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LCD display Description
• E LF: Encoder Legal Fixed Firmware;
UMU: Ultrasonic Measurement Unit CRC
Intelis Gas Meter LCD display alarms
The Intelis Gas Meter reports the following alarms on the LCD. Active alarms are logged.
Events that create alarms are logged with a start and an end time. Users may cross check
alarms over the network or with a device loaded with FDM T
ools. For more information, see
Cross checking Events with FDM.
LCD event or alarm Description
Reverse flow detect. The meter is currently detecting
reverse flow; gas flowing from out to in.
The reverse flow event is an alarm for utilities that alert
them about possible tampering. If a reverse flow is
detected, the meter may be installed backwards.
Ext. high flow detect. The meter detected flow that
exceeded the customer configured or Itron configured
high flow threshold of 500 CFH over 5 counts (about 10
seconds).
High temp detect. The meter detected that the
temperature exceeded the customer configurable high
temperature threshold.
Air in pipe detect. The meter detected air in the meter.
The air in pipe alarm will be set to ‘ready to detect’ state
after measuring more than 1.4 CFH (40 L/H). The speed
of sound of the gas being measured is periodically
compared to the speed of sound of air to determine if an
air in pipe alarm/event is triggered. The minimum flow
rate was chosen to reduce nuisance air in pipe alarms
upon initial installation.
Intelis is rated as Class 1 (+/-1% accuracy) for Natural
Gas T
ype H, E, L for reference gases G20, G21,G23,
G25, G26 and G27 which includes gas compositions
with up to 13% propane. It should be noted that during
Intelis Gas Meter LCD Operation
Intelis Gas Meter Installation Guide TDC-1782-002 17
Proprietary and Confidential
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