Operation Manual

WESROC Residential LTE Cellular Tank Monitor - Operation Manual
72-70-214, Rev. D Page 23 06/25/2018
Battery Replacement
The WESROC Residential LTE Cellular Tank Monitor (RTM) uses a field replaceable 3.6V
lithium thionyl chloride battery supplied by WESROC Monitoring Solutions. The RTM
operates on a very small amount of power, but eventually the battery will need
replacement. The RTM must be moved to a non-hazardous location before opening
the enclosure for battery replacement! The following steps and photos illustrate how to
replace the RTM battery.
1] Remove the six screws from the bottom of the RTM enclosure and remove the bottom
half of the enclosure, sliding the circuit board out of the top half of the enclosure.
2] Depress the small tab on the sensor cable connector and remove it from the connector
on the circuit board.
3] Clip the cable tie securing the old battery and remove the battery from the battery
holder. Place a new battery in the battery holder and secure using a new cable tie.
Make sure the battery is properly seated into the holder and that the polarity
markings are correct! Do NOT try to use a 1.5V alkaline or lithium battery!
4] Reconnect the sensor cable, place the circuit board into the upper half of the enclosure,
fit the bottom half of the enclosure to the top half, and replace the six enclosure screws.
(Make sure the small tab at the end of the enclosure bottom is properly aligned with the
small notch on the edge of the enclosure top.)
Be sure to tighten the screws enough to compress the enclosure gasket and make a
weather tight seal, but do not over tighten the screws and strip the threads from the
RTM enclosure. (Proper screw torque is about 10 inch pounds.)