Replace The Sensor Assembly - ABB LevelMaster 7100 User Manual

Update configuration to reflect float change
If the float type or number has changed, then the float configuration must be updated.
To update configuration:
1. Connect to the LevelMaster as described in section 8.8, Establish local communication with electronics board.
2. When the communication is succesful and the monitor tab displays, click the Setup tab.
3. Under Make Hardware change, click Hardware change.
4. In the Select category drop down list, select Float Configuration.
5. Click Next.
6. Select the appropriate float configuration.
7. Click Next, and follow on-screen instructions.
8. Click the Monitor tab when complete to verify the new readings. If the readings look correct, this concludes the setup
portion.
9. Disconnect the laptop.
10. Reinstall the unit back into the tank as described in section 8.5, Reinstall the unit into the tank.

Replace the sensor assembly

The following procedure will instruct how to replace the sensor assembly and then use the MasterLink software program to
update the configuration to reflect the change.
IMPORTANT NOTE: Sensor assembly replacement requires removing field wiring and taking the unit out of the
tank.
DANGER - Serious damage to health/risk to life. When performing service, or using a laptop in a classified area,
ensure explosive gasses are not present.
Tool and materials required:
Slotted screwdriver
Wooden blocks to support the unit on the floor once extracted from the tank
Replace sensor assembly and casing
A replacement sensor assembly is typically shipped inside its casing to prevent damage to the sensor coil. This procedure
removes the existing casing and installs a new one in order to replace the internal sensor assembly. If only the sensor assembly
is available, see section 8.14.2, Replace sensor assembly only (no casing).
To replace both the sensor assembly and casing:
1. Remove the power and cover as described in section 8.1, Remove the enclosure cover.
2. Remove field wiring as described in section 8.2, Remove field wiring.
3. Reinstall the cover back on the enclosure to protect the board during extraction from the tank.
4. Remove the unit from the tank as described in section 8.4, Remove the unit from the tank.
5. Remove the enclosure as described in section 8.6, Remove the enclosure from the casing.
6. Remove the casing from the support wooden blocks and position the new one on the blocks.
7. Reinstall the enclosure on the new casing as described in section 8.7, Reinstall the enclosure on the casing.
LevelMaster 7100 User manual 2105835 Rev AA | 78