HF scientific Oil Content Monitor - Manual (Page 22)

OCM Rev. 3.9 (1/03) 16
9.0 Routine Maintenance
9.1 Cleaning the Optical Chamber (Sample Tube)
Proper measurement of the oil content of sample water requires that the sample tube be
free of debris. Cleaning the sample tube is accomplished by first purging the system:
1. Stop the flow of sample water to the OCM.
2. Run oil free water for several minutes through the instrument and then shut off the
flow to the instrument (ensure that the sample tube remains full with clean water).
3. Remove the cleanout plug and then clean the interior of the sample with the brush
provided. If necessary, you may use any common non-abrasive detergent to help in
the removal of any residual buildup on the sample tube.
4. Empty the sample chamber to drain and then re-attach the flow of sample water to the
OCM.
Once cleaned, the OCM can be put back into operation.
9.2 Replacing the Desiccant Cartridge
Proper use of the supplied desiccant cartridge is essential in maintaining the performance
of the instrument. The desiccant cartridge has been designed to have a long life. The
desiccant cartridge should be replaced when the color of the desiccant (as viewed through
the sight glass) has turned pink.
To remove the old desiccant cartridge, simply unscrew the cartridge from the front of the
case by rotating the cartridge counter-clockwise (see Figure 6). Once removed, place the
new cartridge into the instrument with the reverse movements. Then continue using the
instrument as normally instructed.
9.3
Replacing the Source Lamp
Periodically the source lamp will require replacement. Please note that a failed lamp will
indicate a W01 on the LCD screen.
To replace the lamp:
Note: Refer to Figure 7 when following these steps.
1. Open the sensor portion of the OCM by unscrewing the four sensor cover screws.
These screws should remain captive in the sensor cover even when fully loosened.
2. Pull the electronics module out enough to reach the lamp setscrew on the optic ring. If
you pull the module out too far, simply realign the board with the marked slots and
push back in.
3. Use a .050” Allen wrench to loosen the lamp setscrew on the right side of the large
optic ring. Do NOT loosen the setscrew on the lamp collar.
4. Pull the lamp and collar out.
5. Undo the lamp terminal connections by flipping up the terminal block levers.
6. Discard the lamp.
7. Insert the new lamp. Note that the collar controls the alignment of the replacement
lamp. The lamp will only fit in place when the pin of the collar fits into the hole of the
optic ring. Tighten the lamp setscrew.
8. Attach the leads to the terminal block (lamp is not polarity sensitive). Lock the levers
down firmly.
9. Ensure that the lamp is on. Light should be shining into the optic ring.