Gas meter Row Details: Alarming tab

Level Alarming

Will allow you to set the alarm limits associated with this gas meter.

Alarm Deadband

This value controls the sensitivity of the high and low alarms.

HiHi/LoLo Alarm Check

Select the checkbox to indicate that a HiHi (HighHigh) / LoLo (LowLow) Alarm Check should be performed.

Hi/Lo Alarm Check

Select the checkbox to indicate that a Hi (High) / Lo (Low) Alarm Check should be performed.

HiHi Alarm Limit

Define the HighHigh Alarm Limit threshold. A HighHigh alarm is generated if the volume is greater than this limit.

Hi Alarm Limit

Define the High Alarm Limit threshold. A High alarm is generated if the volume is greater than this limit but less than the HighHigh limit.

Lo Alarm Limit

Define the Lo (Low) Alarm Limit threshold. A Low alarm is generated if the volume is less than this limit but greater than the LowLow limit.

LoLo Alarm Limit

Define the LowLow Alarm Limit threshold. A LowLow alarm is generated if the volume is less than this limit.

Rate of Change Alarming

Rate of Change (ROC) alarming provides non-persistent alarm information. Such an alarm serves to notify the operator of a condition that has occurred, even though the record may still be well within its normal operational range.

Enable ROC Alarm

Select the checkbox to enable the ROC alarm. If the ROC exceeds the ROC limit, an alarm is generated.

Rate of Change Limit

An alarm is generated if the calculated ROC is greater than this amount.

Creep Alarming

Allows you to set an alarm to detect when the gas meter creeps out of the normal calibrated state over time.

Creep Detection

An alarm is declared when a gas meter value becomes greater than the initial setpoint value plus the creep value, or less than the initial setpoint value minus the creep value.

Deviation Alarm Limit

The maximum deviation value (engineering units) that is acceptable before calibration deteriorates.