18 Sentry Equipment Corp
Replacing Totalizer/Display Battery
 NOTE
It is necessary to document programmed values prior to replacement of the totalizer battery.
Failure to do so will result in incorrect scaling and error in totalized volume. The factory
calibrated values are located on the ow meter.
The totalizer/display battery will last up to ve years under normal circumstances.
The factory calibrated values for the ow meter are located on the ow meter. It is
recommended to record the programming values of the totalizer prior to experiencing a
dead battery. If you do not have these values, it will be necessary to recalibrate the ow
meter. To replace the battery and reset the ow totalizer, follow the below procedure.
1. Disconnect power from the unit.
2. Remove dead battery by sliding o battery cover, pulling out the old battery and
installing the new battery, noting the polarity.
3. Verify the display screen is on.
4. Place unit into calibration mode. On some models, using the meter calibration switch
located on the side of the CPS sampler will do this. Otherwise, use a jumper to connect
terminal 5 to terminal 4 on TB1 located in the electrical enclosure.
5. Using your recorded programming values, reenter these values into the display on the
appropriate screen.
6. Take unit out of calibration mode. On some models, using the meter calibration switch
located on the side of the CPS sampler will do this. Otherwise, disconnect terminal 5
from terminal 4 on TB1 located in the electrical enclosure.
Filter Holder
Refer to Figure 3 & Figure 4 for identication of lter assembly components.
The lter retainer is designed to prevent distortion of the lter papers when opening and
closing the lter housing. The retainer can be easily removed by grasping the locating ears
between your thumb and forenger.
Periodically inspect the o-ring for wear. Replace as necessary.
The lter support is made of a delicate microscopic screen; handle it with care. Inspect it
before each use for dents and punctures. Replace if damaged.
On the Standard Filter Housing, keep the threads on both the retaining ring and the lower
housing clean. Dirt may cause galling of the threads. Occasionally the inside surfaces may
become lmed. Clean with commercial grade detergent soap and water.