Stratus IQ alerts
The following information describes the alarms, errors, and warnings that make up the Stratus IQ available alerts. The meter sends a message to the RNI whenever an alert condition triggers.
The Error or Warning code displayed on the LCD and reported through the FlexNet system is a HEX value, in which non-zero bits represent an error condition. Multiple error conditions may exist at once which produces a value that is the combination of the HEX values for those errors.
| Meter event name | RNI event name | Firmware version |
|---|---|---|
| Metrology THD and TDD Exceeded | 6.1.X.X and up | |
| Metrology THD Exceeded | 6.1.X.X and up | |
| Arc Detect | Metrology Arc Detect | 6.1.2.0 and up |
| Brown Out | Brown Out | |
| Calibration Corrupted | Metrology Calibration Error | |
| Click Count | N/A - Not an alert | |
| Configuration Error | Metrology Configuration Error | |
| Current Auto Open (CAO) | Service Limiting Open Due To High Current | |
| Cut-Wire Tamper | Cut-Wire Tamper | 6.1.3.0 and up |
| Disconnect Corrected | Metrology Switch Auto-correction Initiated | |
| Flash Startup Scan Failed E0008 | Metrology Data Storage Failure | |
| High Temperature | High Temperature Detected | |
| Inversion Detection | Metrology Inversion Tamper | 6.1.2.0 and up |
| Last Gasp | Power Fail | |
| Line Power Unstable | Unstable Power | |
| Load Side Sense | Disconnect Load Side Voltage Sense | |
| Loss of Neutral | Metrology Loss of Neutral | 6.1.2.0 and up |
| Magnetic Tamper | Metrology Magnetic Tamper | 6.1.2.0 and up |
| Optical Port Lockout | Optical Port Lockout | |
| Outage - Momentary (MMD) | Metrology Momentary Outage Threshold Exceeded | 6.1.X.X and up |
| Outage - Temporary (MTD) | Metrology Temporary Outage Threshold Exceeded | 6.1.X.X and up |
| Over Class Amps | Over Current | |
| Over Voltage | Over Voltage | |
| Power Fail | Power Fail | |
| Power Restore | Power Restore | |
| Reverse Energy | Reverse Energy | |
| Sag | Metrology Sag | 6.1.2.0 and up |
| Single Phase Fail | Single Phase Fail | |
| Single Phase Restore | N/A | |
| Swell | Metrology Swell | 6.1.2.0 and up |
| Tamper - Meter Removal | Tamper | |
| TDD Exceeded | Metrology TDD Exceeded | 6.1.2.0 and up |
| Temperature Auto Open (TAO) | Disconnect Open Attempted | |
| THD-I Exceeded | 6.1.2.0 and up | |
| THD-V Exceeded | 6.1.2.0 and up | |
| Theft Tamper | Metrology Theft Tamper | 6.1.2.0 and up |
| Tilt | Metrology Meter Tilt | 6.1.2.0 and up |
| Tilt Exceeded | Metrology Meter Tilt Exceeded | 6.1.2.0 and up |
| Tilt Remote Disconnect | Metrology Meter Tilt Remote Disconnect | 6.1.2.0 and up |
| Meter event name | RNI event name | Event description | Event trigger | Event source | Xylem recommended action |
|---|---|---|---|---|---|
| Metrology THD and TDD Exceeded | Receipt of this alarm indicates that the Total Demand Distortion (TDD) value has exceeded the set threshold. | The THD/TDD feature consists of configurable Priority Alarms and meter logs when various types of harmonic distortion exceed programmable thresholds on average over a time interval. There are up to 6 separate types of measurements which may be selected in any combination to trigger an alarm: THD Voltage Phase A; THD Voltage Phase C (meter forms 2S, 4S, 12S/25S); THD RMS Current Phase A; THD RMS Current Phase C (meter forms 2S, 4S, 12S/25S); TDD (Demand Distortion) Phase A; TDD Phase C (meter forms 2S, 4S, 12S/25S). A separate threshold for alarming may be configured for THD-V, THD-I, and TDD (Phase A and Phase C share the same threshold for each), with units of 0.01% with a maximum threshold of 655.34%. A common time interval is configured for all types of harmonic distortion measurements, with a range from 1 minute to 63 hours (the recommended default is 10 minutes). During the configurated time interval, each type of harmonic distortion measurement is averaged, and a comparison made to each threshold at the end of the interval. The intervals are not synchronized to other meter measurement intervals and begin 15 minutes after either the meter is energized or the Remote Disconnect switch is connected. Once any of the configured harmonic distortion average measurements exceeds its threshold for an interval, a 3-message burst of Priority Alarms is sent to the network with a randomized dither/delay over a 5 second window (to prevent network congestion if many meters experience the same line condition). All of the 6 possible measurements which have exceeded their thresholds in that interval will be indicated in each alarm message. A configurable automatic re-arm timer (for example 24 hours) will automatically resume detection and a new alarm if the condition occurs again. The alarm may also be immediately re-armed by OTA command at any time. THD is calculated using the first 39 harmonics of 60Hz according to standard ANSI equations. Likewise, TDD uses a standard calculation with a continuously-updated long-term Demand RMS reference current, based on a fixed 15 minute averaging interval. | Metrology | Use Device Manager “Get More Info” function to collect and store data associated with the alert. Look for similar alerts from nearby meters and related voltage quality indicators. Contact end customer for info on flickering lights or unwanted electrical events. Inspect meter only if utility feels there is sufficient evidence of an electrical service issue unique to that particular installation. | |
| Metrology THD Exceeded | Receipt of this alarm indicates that the Total Harmonic Distortion (THD) for either voltage, current, or both have exceeded the configured threshold during a configured time interval. | The THD/TDD feature consists of configurable Priority Alarms and meter logs when various types of harmonic distortion exceed programmable thresholds on average over a time interval. There are up to 6 separate types of measurements which may be selected in any combination to trigger an alarm: THD Voltage Phase A; THD Voltage Phase C (meter forms 2S, 4S, 12S/25S); THD RMS Current Phase A; THD RMS Current Phase C (meter forms 2S, 4S, 12S/25S); TDD (Demand Distortion) Phase A; TDD Phase C (meter forms 2S, 4S, 12S/25S). A separate threshold for alarming may be configured for THD-V, THD-I, and TDD (Phase A and Phase C share the same threshold for each), with units of 0.01% with a maximum threshold of 655.34%. A common time interval is configured for all types of harmonic distortion measurements, with a range from 1 minute to 63 hours (the recommended default is 10 minutes). During the configurated time interval, each type of harmonic distortion measurement is averaged, and a comparison made to each threshold at the end of the interval. The intervals are not synchronized to other meter measurement intervals and begin 15 minutes after either the meter is energized or the Remote Disconnect switch is connected. Once any of the configured harmonic distortion average measurements exceeds its threshold for an interval, a 3-message burst of Priority Alarms is sent to the network with a randomized dither/delay over a 5 second window (to prevent network congestion if many meters experience the same line condition). All of the 6 possible measurements which have exceeded their thresholds in that interval will be indicated in each alarm message. A configurable automatic re-arm timer (for example 24 hours) will automatically resume detection and a new alarm if the condition occurs again. The alarm may also be immediately re-armed by OTA command at any time. THD is calculated using the first 39 harmonics of 60Hz according to standard ANSI equations. Likewise, TDD uses a standard calculation with a continuously-updated long-term Demand RMS reference current, based on a fixed 15 minute averaging interval. | Metrology | Use Device Manager “Get More Info” function to collect and store data associated with the alert. Look for similar alerts from nearby meters and related voltage quality indicators. Contact end customer for info on flickering lights or unwanted electrical events. Inspect meter only if utility feels there is sufficient evidence of an electrical service issue unique to that particular installation. | |
| Arc Detect | Metrology Arc Detect | Arc Detection is enabled automatically when FW v6100 or later is installed. To use the auto-push Alarm, send a new configuration package to the meter with RNI SW v4.10.1 or later. Arc Type: Sustained. Arcing occurring consistently for >=200ms. Sudden change in the harmonic content of the Line side meter voltage consistent with an arc. Possible cause: Loose socket connection. Arc Type: Vibrational. Arcing which re-occurs over several seconds but which lasts less than 1 line cycle. Short term changes in the line voltage from one cycle to the next. Possible cause: Intermittent loose connection. Arc Type: Heating. Arcing which heats up the meter prongs. Heating of the meter load side prongs above the level expected due to heating from current. Possible cause: High resistance socket. | Electrical conditions indicate arcing at the meter bus bar connections to the socket, due to a high-resistance or loose connection. Arc detection operates if the load current is at least 0.5 amps. Arc Detection alarms may be configured on/off, and there is also an optional configuration for Remote Disconnect Auto-Open when an arc is detected. A unique Reason Code has been defined to indicate if the Remote Disconnect switch is opened due to arcing, and any automatic scheduled reconnect actions are cancelled. Arc Detection may be configured on for all meter forms but will be automatically inactive for 3S and 4S meters (where arc conditions are precluded by transformers). Upon detection of an arc event, a Priority Alarm is immediately transmitted to the network, with multiple (6)-burst redundancy (each burst separated by 5 seconds) to ensure delivery. A configurable automatic re-arm timer (for example 24 hours) will automatically resume detection and send new alarms if the condition is still present or occurs again. The alarm may also be manually re-armed using Cmd 61. The Arc Detect Alarm message will report the type of arc detected, and the meter circuit/bus bar. The message reports 3 alarm types: Heating, where heating of the meter load side stabs is changing above the level expected due to heating from current; Sustained, where sudden change in the harmonic content of the Line side meter voltage consistent with an arc during a 1-second interval, or Vibrational, where short term changes in the line voltage from one line-cycle to the next. The meter circuit/bus bar can be Phase A or Phase C. Phase C is applicable for meter forms 2S, and 12S/25S. Note that for Vibrational arcs, alarms use a filter requiring at least 3 events in a 10-second window to trigger. This filter is not adjustable by the customer and is subject to tuning by Sensus in future releases of firmware or the IConfig2 tool. | Metrology | Use Device Manager "Get More Info" function to collect and store data associated with the alert. Inspect meter installation and connections. |
| Brown Out | Brown Out | Low voltage. Set if the minimum voltage is less than the configured Brown Out (low voltage) threshold. | Set if minimum voltage is less than the configured low voltage threshold (measured over 1 second intervals). Real-time alarm is sent upon low voltage detection. The metrology measures the line voltage and the radio module compares to the configured Brownout threshold and triggers an immediate Priority Short Alarm AC82 (configurable) which repeats at each VAW reset while the condition persists, and also sets the BO flag in all FNv1 message transmissions until the end of the VAW during which the voltage recovers. | Metrology | Monitor. |
| Calibration Corrupted | Metrology Calibration Error | Too many unsuccessful attempts to read the calibration occurred. The meter cannot access the calibration data. | At a power restore or metrology processor reset, if the meter cannot read stored calibration data it will latch Error 0002 and use default form 2S tuning. 1 Priority Short Alarm AC82 (or normal alarm if so configured) is immediately transmitted to the HES with the error and then an additional alarm is repeated at the start of each new VAW until the Error is manually cleared. The meter will display error code 0002. | Metrology | Visit meter with Spotlight and clear the Error 0002 using Cmd 61, restart the metrology using Cmd 51 subtype 2, then confirm whether Error 0002 persists. If so, the Error is fatal and replace meter. If the error clears, upgrade FlexNet firmware to 6.0.8.0 |
| Click Count | N/A - Not an alert | The number of times AC voltage gaps that do not result in a power fail alarm. Click counts and history are available but are superseded by Momentary and Temporary Outage alarms and logs for DT 96. | The meter is currently undergoing transformer breaker operations or other causes of short power outages. | Radio Endpoint | Change the voltage source to reduce breaker operations or in case of Stratus, change the voltage threshold for reporting the click count alarm. Or correct other issues with the service. |
| Configuration Error | Metrology Configuration Error | Configuration Error 0040. This can occur at a power restore or after receiving a configuration command. Possible causes: The ratio of demand main intervals to demand sub intervals is greater than or equal to sixteen to zero, or the ratio is not evenly divisible, or the main interval is less than five minutes; There are too many demand sources in the self-read; TOU is enabled and the flash TOU Config block cannot be read after a processor reset; TOU is enabled and the flash TOU Schedule block cannot be read after a processor reset; TOU is enabled and the NTA or CPP tiers are 0; TOU is enabled and a TOU schedule uses a day schedule whose first switch point has a tier value of 0. | Bad configuration detected at Power Restore or immediately after receiving a configuration command. | Metrology | Check meter configuration settings if recently reconfigured. If not intentionally reconfigured and this error occurs, contact Sensus (operation may be impaired). If due to a bad configuration attempt, clear the error (Cmd 61), then reconfigure. |
| Current Auto Open (CAO) | Service Limiting Open Due To High Current | Auto-Disconnect - Current; Current to the load has exceeded the configurable Current Auto Open time period. The service disconnect switch (if available) is opened to ensure safety. | The service disconnect switch opened upon detection of over current. Current to the load has exceeded the configurable Current Auto open time period. The service disconnect switch (if available) will be opened to insure safety. Priority Short Alarm AC82 (configurable). The CAO alarm messages will also be repeated every 15 minutes until acknowledged by the RNI (Alarm Ping or Load Shed command of any type). The RD switch has opened, thus the CAO event does not clear on its own. An on-site inspection of the meter installation is recommended. Once the installation problem is corrected, the RD switch can be re-closed using the Load Shed command. This is just an event message sequence, it does not have a corresponding latched Error bit. | Metrology | Investigate. |
| Cut-Wire Tamper | Cut-Wire Tamper | Meter internal cut/disconnected wiring, available for FW versions v6130 and later. The meter alarm and detection functions share the same configuration commands (97.28, 126.9.1) and pings (81.28, 103.13.1) as the Theft Bypass Tamper functions. When the alarm for the shared Theft Bypass/Cut-Wire functions is enabled, an on-air Alarm message will be transmitted if the meter detects a disconnected internal sensor wire. This detection work for all meters (with or without an RD switch). Note that other alarms may occur simultaneously or shortly after a cut-wire event, due to possible intermittent sensor connections (for example: high temperature, arc detection). | Alarm message transmitted when the meter detects an internal disconnected sensor wire. When a Cut-Wire event is detected, a log record is created in the meter event log. The detection function automatically re-arms itself when the condition subsides. If intermittent connections cause the detection function to repeatedly re-trigger in a short time period, a throttle may be applied to limit the frequency of logging and notifications. | Metrology | Use Device Manager "Get More Info" function to collect and store data associated with the alert. Inspect meter installation and connections. |
| Disconnect Corrected | Metrology Switch Auto-correction Initiated | Auto-correct the meter switch back to its previous position because of tampering or rare event. If the auto-correct is not successful this error may be sent with the Disconnect Fail error. | RD Switch detected in wrong position for 10 seconds. The meter will display error code 2000. Error 2000 latches until manually cleared using Cmd 61. Priority Short Alarm AC82 for the Error 2000 is immediately sent. Stratus IQ Error codes are also pushed in the Weekly Alarm message AC 77 and can be pinged for with the Alarm Ping (AC44) and Weekly Alarm Ping. | Metrology | Monitor. |
| Flash Startup Scan Failed E0008 | Metrology Data Storage Failure | Failed to read one or more external flash sectors at startup after 3 tries. Data loss possible. For FW version 6100 and later, this error will trigger an immediate Alarm. | Metrology | ||
| High Temperature | High Temperature Detected | When the meter detects high temperature, it sends a Priority Short Alarm burst (or normal alarm if so configured) within 10 seconds. Six alarm messages are transmitted five seconds apart and one alarm message is repeated every 15 minutes until the condition subsides or the HES clears the alarm for each event. When there is a rapid temperature rise, a reduced temperature threshold feature deploys which lowers both the High Temperature Alarm threshold and the Temperature Auto Open thresholds by a common configurable amount. With FW v6110 and later, the threshold is automatically adjusted to compensate for bus bar heating associated with load current. | Triggered immediately when any internal meter bus bar temperature exceeds the configurable High Temperature Alarm (HTA) threshold, or (with FW v6110 and later) if the meter electronics temperature exceeds a fixed threshold. The temperature must drop at least 15 degrees below the threshold before the high temperature detection function will re-arm for another detection. | Metrology | On-site visit is required to investigate the meter socket and service. The meter must be pulled from the socket to inspect the stab contacts. |
| Inversion Detection | Metrology Inversion Tamper | Inversion Detection. The reference angle is set and logging is enabled automatically in FW v6100 and later, but using the auto-push Alarm requires sending the meter a new configuration package with RNI SW v4.10.1 or later. A meter was seated into a vertical meter pan incorrectly. Inversion detection alarms should be disabled for unusual situations where the meter socket is not vertical. | This command configures the Meter Inversion Detection function, which uses the accelerometer to detect a meter placed upside down in a vertically-mounted socket. When enabled, an on-air Alarm message will be transmitted. This function should not be enabled for non-vertical sockets. The inversion is detected if the accelerometer, sampled once per 10 seconds, has any negative vertical reading at or greater than 0.5 times normal gravity. This function is meant to detect meters plugged into sockets upside down, however, it will also trigger if the meter and its socket are moved into a position which meets the above criteria. This function operates independently of the Tilt Detection – if both are active, it is possible to also have a Tilt event when triggering an Inversion. Likewise, the act of unplugging a meter from a live socket to install it upside down should also trigger a legacy Tamper alarm. Meter inversion does not require the install position to be set in order to operate, however the angle from installed position fields in the logs and alarms will not be valid if inversion triggers before the meter has an installed position. Once a meter has triggered an Inversion event, it will automatically log the event time it enters and leaves the inverted condition while powered on. Alarms are not necessarily transmitted for each event trigger based on the alarm setup. When detected to be in the Inverted state, the meter will automatically block the Remote Disconnect switch from opening by command, load limiting, or any scheduled event, since doing so might power off the entire meter. However, other critical events such as Temperature Auto Open will open the switch and potentially permanently disconnect meter communications until the meter inversion is physically corrected, if plugged into the socket upside down. When a Load Shed Open command is blocked, the response will be a generic NAK and an immediate retransmission of the Inversion Alarm, if enabled, to indicate the reason for the NAK. Blocked TOU-scheduled or other open events will not provide any indication. | Radio Endpoint | Use Device Manager "Get More Info" function to collect and store data associated with the alert. Inspect meter installation and connections. |
| Last Gasp | Power Fail | Last Gasp. No power detected for longer than the configured Outage Time threshold. | No power detected for longer than the configured outage time threshold. Waits until Outage Time Threshold met, then up to 4 PF Alarms sent in 4 intervals. Stratus IQ always transmits 4 alarms unless power comes back during the transmission/dither period, or the meter does not have enough reserve capacitor charge to allow it (for example, there is a brief power restore not allowing sufficient charging time, followed by another power fail). | Metrology | Monitor. |
| Line Power Unstable | Unstable Power | No AC line power detected for 24 seconds consecutive after a processor restart. | Metrology | Cycle power to meter or manual clear errors. | |
| Loss of Neutral | Metrology Loss of Neutral | Loss of Neutral logging is automatically available in FW v6100 and later. The auto-push Alarm needs to be enabled with a new configuration package sent to the meter using RNI SW v4.10.1 or later. Meter has detected anomalies in the current and voltage signals that indicate a broken neutral has occurred between the meter and the utility transformer. | The Loss of Neutral Detection alarm feature allows notification for the electrical characteristics of intermittent or sustained loss of the neutral connection for several meter forms. For 2S and 12S/25S meters, a faulty neutral connection can be detected based on perfectly-balanced load conditions anywhere from the transformer to the meter to the residential breaker panel. Note that Loss of Neutral may be enabled for all meter forms to simplify configuration of diverse meter populations, but will have no effect for 1S, 3S or 4S meters. The intermittent detection uses a filter requiring at least 5 separate short periods (of at least 2 seconds each) of unusual electrical phase balance within any 15-minute interval in order to trigger an alarm. This filter is not adjustable by the customer and is subject to tuning by Sensus in future releases of firmware or the IConfig2 tool. The sustained detection allows additional detection of rare cases where a meter powers up in a circuit where the neutral has been completely disconnected for over 30 seconds. This time period avoids interference with typical 240V installation/inspection tests. A built-in low-current cutoff of 1 amp allows operation with all typical residential load transient conditions. Upon detection of a Loss of Neutral event, a Priority Alarm is immediately transmitted to the network, with multiple(6)-burst redundancy (each burst separated by 5 seconds) to ensure delivery. | Metrology | Use Device Manager "Get More Info" function to collect and store data associated with the alert. Any alarm typically warrants a physical inspection of the meter installation. |
| Magnetic Tamper | Metrology Magnetic Tamper | Magnetic Tamper. Magnetic Tamper detection logging is enabled automatically with FW v6100 or later, but you must send a new configuration package to the meter with RNI SW v4.10.1 or later to enable the auto-push Alarm. The meter has detected a magnet is in close proximity to the meter. In meters with FW v60B0 and earlier, some extreme magnetic tampering attempts may result in the meter reporting a Power Fail Alarm. | Gauss rating of roughly 50 present near the meter to trigger alarm. | Metrology | Use Device Manager "Get More Info" function to collect and store data associated with the alert. Inspect meter installation and connections. |
| Optical Port Lockout | Optical Port Lockout | Too many unsuccessful login attempts have locked the optical port. | Excessive number of consecutive unsuccessful attempts to access the optical port. Besides the OTA message defined in the above, the meter will display an error code of 0400. | Metrology | Monitor. |
| Outage - Momentary (MMD) | Metrology Momentary Outage Threshold Exceeded | Outage Momentary (MMD) is automatically logged in FW v6110 and later. Send a new configuration package with RNI SW v4.10.1 or later to use the auto-push Alarm. The meter has experienced an outage that exceeds the Min Momentary Interrupt Duration but less than the Min Temporary Interrupt Duration. | The meter has experienced an outage that exceeds the Min Momentary Interrupt Duration but less than the Min Temporary Interrupt Duration. | Radio Endpoint | Use Device Manager “Get More Info” function to collect and store data associated with the alert. Look for similar alerts from nearby meters and related voltage quality indicators. Contact end customer for info on flickering lights or unwanted electrical events. Inspect meter only if utility feels there is sufficient evidence of an electrical service issue unique to that particular installation. |
| Outage - Temporary (MTD) | Metrology Temporary Outage Threshold Exceeded | Outage Temporary (MTD) is automatically logged in FW v6110 and later. Send a new configuration package with RNI SW v4.10.1 or later to use the auto-push Alarm. The meter has experienced an outage that exceeds the Min Temporary Interrupt Duration but is less than the Outage Time Threshold. | The meter has experienced an outage that exceeds the Min Temporary Interrupt Duration but less than the Outage Time Threshold. | Radio Endpoint | Use Device Manager “Get More Info” function to collect and store data associated with the alert. Look for similar alerts from nearby meters and related voltage quality indicators. Contact end customer for info on flickering lights or unwanted electrical events. Inspect meter only if utility feels there is sufficient evidence of an electrical service issue unique to that particular installation. |
| Over Class Amps | Over Current | Over Current. The current flow exceeds the rated class amps. When the current exceeds the class amps for more than 10 seconds a warning is latched in the meter and an optional Alarm message sent. See also Current Auto Open for meters equipped with Remote Disconnect switches. | Set when the current flow exceeds the rated class amps for more than 10 seconds. The first time the condition is detected, an optional alarm message is sent. As a backup, in case that transmission was not received, the over class amps bit is set in each meter read message until the voltage average window expires even if the over class amps condition has already cleared. The Meter will display the code 0800. This will also show up in the weekly alarm file. There is no direct auto-push notification for when the current recovers, however the meter current may be polled with various ping commands or may be configured in ESM snapshots. | Metrology | Monitor. Alarm clears when the Voltage Average Window resets. |
| Over Voltage | Over Voltage | High Voltage. The meter has detected that the voltage exceeds the high voltage threshold. | Set when the maximum voltage (updated each second during each voltage averaging window) exceeds the configured high voltage threshold. The comparison of the max voltage to the threshold is done every 60 seconds for FW version v6120 (and later), every 90 seconds in earlier versions. The first over-voltage detected triggers an optional alarm message. As a backup, in case that transmission was not received, the over voltage bit is set in each meter read message until the voltage average window expires even if the over voltage condition has already cleared. There is no direct auto-push notification for when the voltage recovers, however the meter voltage may be polled with various ping commands or may be configured in ESM snapshots. For the 12S/25S meter form, both phase voltages are monitored and either can trigger the alarm if above the threshold. | Metrology | Monitor or investigate at customer's discretion. |
| Power Fail | Power Fail | Last Gasp; No power detected for longer than the configured Outage Time threshold. | No AC power detected for longer than the configured outage time threshold. Waits until Outage Time Threshold met, then up to 4 PF Alarms sent in 4 intervals. Loss of AC line power is declared by the metrology when voltage on Phase A stab/circuit drops below 80V or there are not consistent zero crossing for 3 or more line cycles. AC must return above the threshold for 500ms to end the line-lost condition. Stratus IQ always transmits 4 alarms unless power comes back during the transmission/dither period, or the meter does not have enough reserve capacitor charge to allow it (for example, there is a brief power restore not allowing sufficient charging time, followed by another power fail). | Metrology | Monitor the meter. |
| Power Restore | Power Restore | AC Power is detected for a longer period than the configured restore time threshold. Waits until Restoral Time Threshold met, then 5 PR Alarms sent in 5 intervals with random dither (unless interrupted by another Power Fail, removal Tamper event, or Single Phase Failure detection). | AC Power is detected for a longer period than the configured restore time threshold. | Metrology | Informational. |
| Reverse Energy | Reverse Energy | Reverse Energy flow has been detected. The detection and associated indicator flag, meter Error, and alarm are configurable. Reverse energy and reverse power are the same and the terms are often used interchangeably. | Reverse Power greater than the low power cutoff (~20mA) has been detected continuously for at least 1 second. RP bit stays set until VAW reset. There is no clear event, so if another reverse power alarm does not show up in the next hour (after the VAW resets), then the reverse power situation has stopped. The meter will display Error 8000. Reverse Energy can be configured as a latching meter Error 8000, non-latching Error 8000, or no error at all. If configured as an Error, it triggers an immediate Priority Alarm message and is also indicated in the Weekly Alarm message. The status can be pinged for with the Alarm Ping and Weekly Alarm Ping. It also indicated in Single/Dual Parameter Read messages (Walk-by/Drive-by read response). If Rev Power is configured as a non-latching Error, the same delivery messages apply. But when the condition stops, the Error automatically clears itself and will show up as zero in the next normal message which happens to contain meter Errors (Weekly Alarm, etc.). Other indicators (other than the Error bit) behave the same way in both latched and non-latched cases. | Metrology | Investigate. |
| Sag | Metrology Sag | The voltage has dropped below the sag tolerance percentage for the configured threshold beyond the defined length of time. Sags are mutually exclusive with interruptions that involve deeper voltage drops. Sags may be logged or alarmed independently, or at the same time as the Brownout alarm depending on the thresholds. | The meter may be configured to detect, store (log), and send Priority Alarms when the measured line voltage falls below or rises above its nominal level by a configured amount (%) for a minimum amount of time and then recovers back beyond the level of configured threshold. Note that Sags are mutually exclusive with interruptions (Momentary, Temporary, Sustained outages and Clicks) which involve deeper voltage drops. A Sag event may be ended by the start of an interruption (the voltage drops further). Note also that a Sag may be logged or alarm independently, perhaps at the same time as the legacy Brownout alarm, depending on the thresholds set for each. Likewise a Swell may be detected at the same time as a legacy Overvoltage alarm or not, depending on the configurations. The Brownout and Overvoltage alarms have a fixed measurement interval of one second compared to the configurable minimum time period for Sags and Swells. Log records and alarms are created at the end of sag or swell events, so that their full duration may be measured and communicated/logged. There is no “early” alarm while the sag or swell event is still in progress, even if it lasts for a long period of time. The meter is able to record details for up to 640 total sag and/or swell events, including the following information: Time stamp, total duration of the event, and whether a sag (or swell) ended with a full power loss. The following voltage characteristics are configurable by the customer to classify a disturbance as a Sag or Swell: Threshold (volts below or above nominal), in units of 0.01 %, separate threshold for Sag and Swell; Minimum Duration required to record an event (in line cycles), one setting applied to both. Priority Alarms may be enabled and configured separately (if logging is also enabled), with the following adjustable parameters: Number of (total) events required to trigger an alarm; Time Window to count events (if Number of Events is set > 1); Automatic Alarm Re-arm Time: used to prevent more than one alarm notification within a certain number of hours, if many sags or swells are occurring. Each alarm event consists of 3 repeated bursts, randomly dithered over 5 second intervals to prevent network congestion if many meters experience the same line condition. The alarm may also be immediately re-armed by OTA command at any time. | Metrology | Use Device Manager “Get More Info” function to collect and store data associated with the alert. Look for similar alerts from nearby meters and related voltage quality indicators. Contact end customer for info on flickering lights or unwanted electrical events. Inspect meter only if utility feels there is sufficient evidence of an electrical service issue unique to that particular installation. |
| Single Phase Fail | Single Phase Fail | For form 12S or 25S meters, power to the "Phase C" line stab has failed (but not Phase A). Three Priority (or Normal if so configured) Alarm messages will be transmitted and the SPF header bit will be set in all messages during FNv1 mod while the condition persists. When a single phase outage event ends, three additional alarm messages with the single phase fail indication reset. If the single phase fail condition clears while still sending the initial alarm message sequence, the device will skip the remaining “alarm” messages and begin the “cleared” message sequence. | Line voltage on the Phase C stab has either fallen below 80V or the waveform is corrupted such that 3 consecutive line cycles have incorrect zero-crossing timing or voltage below a threshold necessary to power the meter’s circuits. | Metrology | The alarm auto-resolves when AC power is restored. If power has been restored but the alarm persists then an on-site visit is required to investigate the status of the meter. |
| Single Phase Restore | n/a | For form 12S or 25S meters, power to the "Phase C" line stab has failed (but not Phase A). Three Priority, or Normal if so configured, Alarm messages will be transmitted. When a single phase outage event ends, three additional alarm messages with the single phase fail indication reset. If the single phase fail condition clears while still sending the initial alarm message sequence, the device will skip the remaining “alarm” messages and begin the “cleared” message sequence. | In two phase meters such as the 12S or 2S, indicates the main phase power is back. Restoral of Phase C of mains power for a 12S or 25S meter. 3 alarm messages randomly spaced. Single Phase Restore isn’t explicitly sent via MS/CMEP and should be n/a, n/a. The fail bit will clear and that should be interpreted as a restoral. For example: CMEP; 12:00 - Single Phase Fail; 12:15 - Single Phase Fail; 12:30 - no alarm, restoral implied. This is only applicable to 12S/25S meters for Stratus IQ. Priority Short Alarm is sent immediately, and there is also a FNv1-only header bit in every transmitted message indicating the most-recent status. In FNV1, there is a choice to have priority alarms enabled or disabled. That is why it was in the header bit of every message. In FNV2, priority alarms are always enabled. | Metrology | Informational. |
| Swell | Metrology Swell | Swell events are automatically logged with FW v6110 and later. The auto-push Alarm should be enabled by sending a new configuration package to the meter with RNI SW v4.10.1 or later. The voltage has exceeded the swell tolerance percentage for the configured threshold beyond the defined length of time. | The meter may be configured to detect, store (log), and send Priority Alarms when the measured line voltage falls below or rises above its nominal level by a configured amount (%) for a minimum amount of time and then recovers back beyond the level of configured threshold. Note that Sags are mutually exclusive with interruptions (Momentary, Temporary, Sustained outages and Clicks) which involve deeper voltage drops. A Sag event may be ended by the start of an interruption (the voltage drops further). Note also that a Sag may be logged or alarm independently, perhaps at the same time as the legacy Brownout alarm, depending on the thresholds set for each. Likewise a Swell may be detected at the same time as a legacy Overvoltage alarm or not, depending on the configurations. The Brownout and Overvoltage alarms have a fixed measurement interval of one second compared to the configurable minimum time period for Sags and Swells. Log records and alarms are created at the end of sag or swell events, so that their full duration may be measured and communicated/logged. There is no “early” alarm while the sag or swell event is still in progress, even if it lasts for a long period of time. The meter is able to record details for up to 640 total sag and/or swell events, including the following information: Time stamp; Total duration of the event; Whether a sag (or swell) ended with a full power loss. The following voltage characteristics are configurable by the customer to classify a disturbance as a Sag or Swell: Threshold (volts below or above nominal), in units of 0.01 %, separate threshold for Sag and Swell; Minimum Duration required to record an event (in line cycles), one setting applied to both. Priority Alarms may be enabled and configured separately (if logging is also enabled), with the following adjustable parameters: Number of (total) events required to trigger an alarm; Time Window to count events (if Number of Events is set > 1); Automatic Alarm Re-arm Time: used to prevent more than one alarm notification within a certain number of hours, if many sags or swells are occurring. Each alarm event consists of 3 repeated bursts, randomly dithered over 5 second intervals to prevent network congestion if many meters experience the same line condition. The alarm may also be immediately re-armed by OTA command at any time. | Metrology | Use Device Manager “Get More Info” function to collect and store data associated with the alert. Look for similar alerts from nearby meters and related voltage quality indicators. Contact end customer for info on flickering lights or unwanted electrical events. Inspect meter only if utility feels there is sufficient evidence of an electrical service issue unique to that particular installation. |
| Tamper - Meter Removal | Tamper | Tamper - meter removal; Activated when the accelerometer detects motion within an outage time window. | Activated when the accelerometer detects physical movement during an outage time window, that is, the meter was removed from socket. Priority Short Alarm (AC 82) sent immediately when the meter is removed from the socket. Upon detection of tamper, power fail alarms with tamper flag set will be immediately transmitted, up to 4 alarm messages randomly spaced in a burst. After transmitting the alarms, the meter shuts down. If the meter is re-inserted in the socket it will transmit power restore alarms, which indicates the end of the tamper condition. The meter records a log of the tamper event, which can be retrieved by a Ping message. | Metrology | Doublecheck if there was a work order for this time. If not, on-site visit is required to investigate the status of the meter. |
| TDD Exceeded | Metrology TDD Exceeded | Available in FW v6110 and later. Receipt of this alarm indicates that the Total Demand Distortion (TDD) value has exceeded the set threshold. | The THD/TDD feature consists of configurable Priority Alarms and meter logs when various types of harmonic distortion exceed programmable thresholds on average over a time interval. There are up to 6 separate types of measurements which may be selected in any combination to trigger an alarm: THD Voltage Phase A; THD Voltage Phase C (meter forms 2S, 4S, 12S/25S); THD RMS Current Phase A; THD RMS Current Phase C (meter forms 2S, 4S, 12S/25S); TDD (Demand Distortion) Phase A; TDD Phase C (meter forms 2S, 4S, 12S/25S). A separate threshold for alarming may be configured for THD-V, THD-I, and TDD (Phase A and Phase C share the same threshold for each), with units of 0.01% with a maximum threshold of 655.34%. A common time interval is configured for all types of harmonic distortion measurements, with a range from 1 minute to 63 hours (the recommended default is 10 minutes). During the configurated time interval, each type of harmonic distortion measurement is averaged, and a comparison made to each threshold at the end of the interval. The intervals are not synchronized to other meter measurement intervals and begin 15 minutes after either the meter is energized or the Remote Disconnect switch is connected. Once any of the configured harmonic distortion average measurements exceeds its threshold for an interval, a 3-message burst of Priority Alarms is sent to the network with a randomized dither/delay over a 5 second window (to prevent network congestion if many meters experience the same line condition). All of the 6 possible measurements which have exceeded their thresholds in that interval will be indicated in each alarm message. A configurable automatic re-arm timer (for example 24 hours) will automatically resume detection and a new alarm if the condition occurs again. The alarm may also be immediately re-armed by OTA command at any time. THD is calculated using the first 39 harmonics of 60Hz according to standard ANSI equations. Likewise, TDD uses a standard calculation with a continuously-updated long-term Demand RMS reference current, based on a fixed 15 minute averaging interval. | Metrology | Use Device Manager “Get More Info” function to collect and store data associated with the alert. Look for similar alerts from nearby meters and related voltage quality indicators. Contact end customer for info on flickering lights or unwanted electrical events. Inspect meter only if utility feels there is sufficient evidence of an electrical service issue unique to that particular installation. |
| Temperature Auto Open (TAO) | Disconnect Open Attempted | Auto Disconnect - temperature. The temperature has exceeded the configurable Temperature Auto Open temperature. The service disconnect switch (if available) is opened to ensure safety. | The temperature has exceeded the configurable Auto Open temperature. Metrology has a configurable Temperature Auto Open (TAO) threshold value where meters equipped with a remote disconnect (RD) switch will shed the load when the Metrology Temperature exceeds this configured value. Upon opening the load, the meter will send 6 Alarm Messages (with HS - Hot Socket set) interlaced with 6 Load Shed Ack responses indicating that the load has been shed. Load Shed Ack messages are automatically transmitted immediately with a Reason code indicating Temperature Auto Open (TAO). In FlexNet Firmware v60A0 and later, the Priority Short Alarm (configurable) for High Temperature is also sent with an indicator for TAO. A single alarm message will also be repeated every 15 minutes until acknowledged by the RNI (via Alarm Ping or Load Shed command of any type). | Metrology | The RD switch has opened, thus the TAO event does not clear on its own. An on-site inspection of the meter installation is recommended. Once the installation problem is corrected, the meter temperature can be confirmed using Ping 40 (Load Limit Status) and the RD switch re-closed using the Load Shed command. When there is a rapid temperature rise, a reduced temperature threshold feature deploys which lowers both the High Temperature Alarm threshold and the Temperature Auto Open thresholds by a common configurable amount. |
| THD-I Exceeded | Available in FW v6110 and later. The Total Harmonic Distortion (THD) value has exceeded the configured threshold for load current on one or more phases. | The THD/TDD feature consists of configurable Priority Alarms and meter logs when various types of harmonic distortion exceed programmable thresholds on average over a time interval. There are up to 6 separate types of measurements which may be selected in any combination to trigger an alarm: THD Voltage Phase A; THD Voltage Phase C (meter forms 2S, 4S, 12S/25S); THD RMS Current Phase A; THD RMS Current Phase C (meter forms 2S, 4S, 12S/25S); TDD (Demand Distortion) Phase A; TDD Phase C (meter forms 2S, 4S, 12S/25S). A separate threshold for alarming may be configured for THD-V, THD-I, and TDD (Phase A and Phase C share the same threshold for each), with units of 0.01% with a maximum threshold of 655.34%. A common time interval is configured for all types of harmonic distortion measurements, with a range from 1 minute to 63 hours (the recommended default is 10 minutes). During the configurated time interval, each type of harmonic distortion measurement is averaged, and a comparison made to each threshold at the end of the interval. The intervals are not synchronized to other meter measurement intervals and begin 15 minutes after either the meter is energized or the Remote Disconnect switch is connected. Once any of the configured harmonic distortion average measurements exceeds its threshold for an interval, a 3-message burst of Priority Alarms is sent to the network with a randomized dither/delay over a 5 second window (to prevent network congestion if many meters experience the same line condition). All of the 6 possible measurements which have exceeded their thresholds in that interval will be indicated in each alarm message. A configurable automatic re-arm timer (for example 24 hours) will automatically resume detection and a new alarm if the condition occurs again. The alarm may also be immediately re-armed by OTA command at any time. THD is calculated using the first 39 harmonics of 60Hz according to standard ANSI equations. Likewise, TDD uses a standard calculation with a continuously-updated long-term Demand RMS reference current, based on a fixed 15 minute averaging interval. | Metrology | Investigate. | |
| THD-V Exceeded | Available in FW v6110 and later. The Total Harmonic Distortion (THD) value has exceeded the configured threshold for one or more phase voltages. | The THD/TDD feature consists of configurable Priority Alarms and meter logs when various types of harmonic distortion exceed programmable thresholds on average over a time interval. There are up to 6 separate types of measurements which may be selected in any combination to trigger an alarm: THD Voltage Phase A; THD Voltage Phase C (meter forms 2S, 4S, 12S/25S); THD RMS Current Phase A; THD RMS Current Phase C (meter forms 2S, 4S, 12S/25S); TDD (Demand Distortion) Phase A; TDD Phase C (meter forms 2S, 4S, 12S/25S). A separate threshold for alarming may be configured for THD-V, THD-I, and TDD (Phase A and Phase C share the same threshold for each), with units of 0.01% with a maximum threshold of 655.34%. A common time interval is configured for all types of harmonic distortion measurements, with a range from 1 minute to 63 hours (the recommended default is 10 minutes). During the configurated time interval, each type of harmonic distortion measurement is averaged, and a comparison made to each threshold at the end of the interval. The intervals are not synchronized to other meter measurement intervals and begin 15 minutes after either the meter is energized or the Remote Disconnect switch is connected. Once any of the configured harmonic distortion average measurements exceeds its threshold for an interval, a 3-message burst of Priority Alarms is sent to the network with a randomized dither/delay over a 5 second window (to prevent network congestion if many meters experience the same line condition). All of the 6 possible measurements which have exceeded their thresholds in that interval will be indicated in each alarm message. A configurable automatic re-arm timer (for example 24 hours) will automatically resume detection and a new alarm if the condition occurs again. The alarm may also be immediately re-armed by OTA command at any time. THD is calculated using the first 39 harmonics of 60Hz according to standard ANSI equations. Likewise, TDD uses a standard calculation with a continuously-updated long-term Demand RMS reference current, based on a fixed 15 minute averaging interval. | Metrology | Use Device Manager “Get More Info” function to collect and store data associated with the alert. Look for similar alerts from nearby meters and related voltage quality indicators. Contact end customer for info on flickering lights or unwanted electrical events. Inspect meter only if utility feels there is sufficient evidence of an electrical service issue unique to that particular installation. | |
| Theft Tamper | Metrology Theft Tamper | Theft(Bypass). When this function is enabled, an on-air Alarm message will be transmitted if the meter detects a bypass around an open remote disconnect switch. This function works only for meters equipped with an RD switch that is in the open position. Bypasses may result in other switch errors such as E4000 when the theft bypass detection is configured off. | Alarm message transmitted when the meter detects a bypass around an open remote disconnect switch. When a Theft Bypass is detected, a log record is created in the meter event log. The detection function automatically re-arms itself when the bypass condition subsides. If intermittent connections cause the detection function to repeatedly re-trigger in a short time period, a throttle will be applied to limit the frequency of logging and notifications. | Metrology | Use Device Manager "Get More Info" function to collect and store data associated with the alert. Inspect meter installation and connections. |
| Tilt | Metrology Meter Tilt | Tilt Detection. The reference angle is set and logging automatically with FW v6100 or later, but using the auto-push Alarm requires sending a new configuration package to the meter with RNI SW v4.10.1 or later. The meter has moved an incremental amount from its original install position, enough to be aware of but not enough to require immediate correction. Sent when the sensed angle of the meter’s accelerometer relative to the Delta Reference Angle reaches or exceeds (>=) the threshold. The relative tilt angle change (tilt angle delta) of the meter has exceeded the configured threshold value. | Delta Angle Trigger: When the sensed angle of the meter’s accelerometer relative to the Delta Reference Angle reaches or exceeds (>=) this threshold, a Tilt event is recorded and an alarm can be transmitted. The value 0 sets the angle to the firmware default. Delta Alarm operation: A new detection event (and Alarm if configured on) will occur each time the Tilt angle changes by the amount of Delta Angle Threshold (vs. the previous event). The event will automatically re-arm itself when it triggers and use the present angle as a new reference point (Delta Reference Angle). The Delta Reference Angle is saved in non-volatile memory and remains valid through power failures. A power restore (or processor reset) will automatically restart (re-arm) the event detection. If there is not yet an auto-calibrate install position, there is no install reference and this event cannot be detected. | Radio Endpoint | Use Device Manager "Get More Info" function to collect and store data associated with the alert. Inspect meter installation and connections. |
| Tilt Exceeded | Metrology Meter Tilt Exceeded | Tilt Detection. The reference angle is set and logging automatically with FW v6100 or later, but using the auto-push Alarm requires sending a new configuration package to the meter with RNI SW v4.10.1 or later. The meter has moved from its original install position and needs to be corrected. The absolute tilt angle of the meter has exceeded the configured threshold value. | Absolute Angle Trigger: When the sensed angle of the meter’s accelerometer relative to the Install Reference Angle reaches or exceeds (>=) this threshold (in degrees), a Tilt event is recorded and an Alarm can be transmitted. The value 0 sets the angle to the firmware default. | Radio Endpoint | Use Device Manager "Get More Info" function to collect and store data associated with the alert. Inspect meter installation and connections. |
| Tilt Remote Disconnect | Metrology Meter Tilt Remote Disconnect | Tilt Detection. The reference angle is set and logging automatically with FW v6100 or later, but using the auto-push Alarm requires sending a new configuration package to the meter with RNI SW v4.10.1 or later. The meter has moved from its original install position enough that the Remote Disconnect switch disconnects. Sent when the sensed angle of the meter’s accelerometer relative to the Install Reference Angle reaches or exceeds (>=) the threshold (in degrees). Also indicates the remote disconnect switch is open. The meter tilt angle has exceeded the threshold configured to trigger an autonomous remote disconnect. | RD Open Angle Threshold: When the difference between the tilt angle and installation angle reaches or exceeds (>=) this threshold, an Alarm sequence is triggered AND the Remote Disconnect switch is automatically opened (if the meter had a Remote Disconnect switch and it is closed). If the Tilt RD Open condition is satisfied (even if the RD was already open due to another reason), the RD cannot be closed until the Tilt condition is cleared. A value of 0 configures the angle to the firmware default. The Clear Errors/Warnings/Events command with the appropriate bit set or a power restore or FlexNet processor reset will re-arm all Tilt event detections including using the RD Open Angle Threshold. If there is not yet an auto-calibrate install position, there is no install reference and this event cannot be detected. | Radio Endpoint | Use Device Manager "Get More Info" function to collect and store data associated with the alert. Inspect meter installation and connections. |