Installation Guide

LCD alarm Description
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
(0.04 m3/h or 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. This alarm has a
start and end log.
Intelis is rated as Class 1 (+/-1% accuracy) for
Natural Gas Type H, E, L for reference gases
G20, G21, G23, G25, G26 and G27 which
includes gas compositions with up to 13% pro-
pane. It should be noted that during propane peak
shaving, for example, higher concentrations in
propane or nitrogen can occur which are outside
these reference gases. This can result in the
speed of sound for the gas composition being
closer to that of the speed of sound of air, which
could result in a false indication of air detection.
For this reason, air detect alarms/events should
be compared to incidences of propane peak shav-
ing along with typical homeowner gas usage and
reverse flow detection before considering further
action for suspect tampering.
Time Sync. The meter detected that its time sig-
nificantly differs (5 minutes or greater) from the
network time.
This alarm only applies to network mode. This
alarm should prompt the utility to look at the net-
work read rates for the meter to see if there is a
general network connectivity issue that is occur-
ring with that meter. If the time is getting out of
sync repeatedly, then it is likely the meter is hav-
ing trouble staying connected to the network, per-
haps due to a network coverage issue. This
alarm has a start and end log.
Table 3LCD display alarms and description (continued)
11 December 2019 TDC-1782-005 24
Intelis Gas Meter Installation Guide 4 LCD Operation