Technical InformationGas MetersVarious Auxiliary EquipmentTechnical DocumentsControllers /Shutoff ValvesAlarmsClassi-cationItemOperating conditionsEvent displayFlow rate shutoffTotal maximum ow rateover shutoffThe total gas consumption of the combustion appliances at the installation site exceeds the specied shutoff value ⇒ UH6:10.8 m3/hQIndividual maximum ow rateover shutoffThe gas ow rate increases, if there is an abnormally large increase in the ow rate, compared to the appliance with the largest consumption among the combustion appliances at the installation site ⇒ UH6:8.4 m3/HKSafety durationover shutoffThe operating time of the combustion equipment is abnormally longThe gas ow exceeds the time limit without any uctuation in the gas ow rateJBackow detection shutoffBackow exceeding the specied value is detectedRWith ow during shutoffshutoffThe ow rate is detected in the “ガス止” (Gas Stop) mode due to some eventPre-shutoff event display After 20 times shutoff outputAlternate display with ■Recovery leak check shutoffA shutoff valve that has been shut down is recovered and a pressure drop is detected, indicating that there is a leakPre-shutoff event displayOutside sensor shutoffAlarm shutoffThe alarm detects a leak and a signal is inputASeismic isolationThe seismic sensor detects an earthquake with a seismic intensity of more than 5GPressure drop shutoffThe pressure value drops below the set value (value set upon request)PPressure rise shutoffThe pressure value rises below the set value (value set upon request)OOther shutoffSensor error shutdownThe ultrasonic sensor becomes abnormal • Sensor error shutoff (resettable): “ガス止” (Gas Stop) is lit • Sensor error shutoff (not resettable): “ガス止” (Gas Stop) ashesXTest shutoffThe shutoff valve is instructed to close by a magnetT(within 40 seconds)Shipping mode40 seconds after test shutoff (plugged state)BlankNormal battery voltagedrop shutoffThe battery voltage checked periodically drops below the prescribed value twice in a row • Normal battery voltage drop shutoff (resettable): “ガス止” (Gas Stop) is lit • Normal battery voltage drop shutoff (not resettable): “ガス止” (Gas Stop) ashesVContinuous battery voltage drop shutoff The battery voltage checked normally drops below the prescribed value twice in a rowY/VCenter shutoffThe shutoff valve is “Closed” by center communicationCDate/time designation centershutoffThe specied date and time that you want to perform center shutoff by center communicationis reachedCShutoff after release • A message to cancel test shutoff by center communication is received in the test shutoff or shipping mode • A message to cancel center shutoff is received during a center shutoffDInner pipe leak alarmA minor leak is detected between the meter outlet and the combustion appliance and a minute gas ow rate is observed for 30 consecutive daysNAlarm / displayRecovery leak check displayDisplay during gas meter recoveredLNormal battery voltage low alarm (Before successful communication call)The battery voltage drops below the specied valueVNormal battery voltage low alarm(After successful communication call)The battery voltage drops below the specied valueVBattery voltage dropgrace period displayThe predetermined conditions are satised after the battery voltage drop shutoff(After a shutoff, the information is displayed for 7 days if special operations are carried out within 14 days)VSensor error alarmThe ultrasonic sensor becomes abnormal(In this case, the indicator value ashes)XWaiting for gain to drop after recovery is nishedAppears until status returns to the normal measurement mode at the end of recovery due to sensor error shutoffXData write errorThe indicator value is not written normally in the non-volatile scalemLine A short circuitdisplayA short circuit occurs due to incorrect connection to Line A etc.EUH Meter Event Display40UH Meter Event Display
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