Water Level Meter Indicator Light Replacement
High Quality Groundwater and Surface Water Monitoring Instrumentation
(Page 1 of 2)
Model 101/102/102M Mk2
Back of Mk2 Model 101 Water Level Meter Faceplate with
Older Style Light
Push-Release
Fittings
Note: To replace the light in an Mk1 Water Level Meter (yellow circuit
board and tape Molex connection), you will require the Mk2
Circuit Board Assembly (#102977), which includes the light.
Contact Solinst for the repair part and instructions.
Instructions
For Mk2 Water Level Meters (Push-Release Tape Connection)
1. Remove the battery (battery is located inside the reel hub of
a 102M Mini Water Level Meter. Remove the batttery after
Step 2).
2. Unscrew the three screws and remove the faceplate.
3. Press down on the white terminals of the push-release
fittings on the circuit board and pull out to remove the
tape/cable leads.
4. If you have an older style light (leads connected to Sonalert
terminals – see photos below), cut the red and black wires
connected to the light, and push the light out through the
front of the faceplate.
Back of Mk2 Model 101 Water Level Meter Faceplate with
New Style Light
Light
Light Connections
Light
Push-Release
Fittings
5. From the front of the faceplate, use the wrench to unscrew
the nut holding the test button and push the button back
out of the faceplate.
6. Unscrew and remove the two screws holding the circuit
board (and older style light leads) from the Sonalert.
7. Carefully lift the circuit board from the Sonalert so you have
better access to the circuit board.
8. If you have a newer style light, unsolder it from the circuit
board and remove as much of the old solder as possible.
9. If you had an older style light (or the lens needs replacing)
insert the new red lens through the front opening in the
faceplate and secure using the white nut.
10. For a Model 101 or 102 Water Level Meter, insert the
leads of the new light into the two positions labelled “D2”
on the circuit board and solder in place. See photo below.
Back of Mk2 Model 102M Mini Water Level Meter Faceplate
with Older Style Light
Light
Light Connections
Push-Release
Fittings
Light (under
circuit board)
Push-Release
Fittings
Back of Mk2 Model 102M Mini Water Level Meter
Faceplate with New Style Light
Continued overleaf...
Tools and Materials Needed
1. WLM Replacement LED (Light) Assembly (Spare) (#113923)
2. Phillips Screwdriver
3. 10 mm (3/8") Wrench
4. Wire Cutters (if required)
5. Wire Strippers (if required)
6. Solder Wire with Flux
7. Soldering Iron
D2
