LevelMaster 7100 User manual 2105835 Rev AA
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Cable for test box (2100979-001)
Digital multi meter (DMM)
To test the LevelMaster sensor:
IMPORTANT NOTE:
Refer to section 8,
to review procedures involving removal and
reconnection of terminal connectors/wiring, electronics boards, and other LevelMaster components. Review the
site guidelines for safety and hazardous locations. Sensor testing may require removal of the unit from the tank, if
physical access to the top of the tank for this procedure is not allowed.
1.
Remove enclosure cover as described in section 8.1,
.
2.
Disconnect the power and communication terminal connector(s) (green Phoenix
®
connector).
3.
Remove the yellow fiberglass tension support.
4.
Remove the electronics board as described in section 8.12.1,
Remove the existing board
. Place it in a safe place during
the test.
5.
Disconnect the ribbon cable.
6.
Connect the sensor ribbon cable to the test box cable.
7.
Set the DMM to the 2K ohms range and attach the leads to the test box.
8. Record the readings.
IMPORTANT NOTE:
On the backside of the test box there is a resistance table with different windings for each
sensor length supported. If the winding readings are +/- 5.0% of the resistance table, then the sensor passes the
test. If the reading is open or shorted, then the sensor has failed the test, and will need to be replaced.
9.
Disconnect the ribbon cable from the test box cable.
10. Reconnect the ribbon cable to the electronics board.
11. Set the board in enclosure.
12. Replace the yellow fiberglass tension support.
13. Reconnect the communication and power connector(s) (green Phoenix
®
terminal connector).
14. Replace the enclosure cover.
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