Chapter 7 Servicing
7-12
CAPILLARY REMOVAL
Equipment required:
Capillary (Part No 7336)
Wire to clean old capillary
1. Wear an antistatic wrist strap, see “Safety Precautions,” earlier in this chapter for
more information.
2. Disconnect power and remove cover.
3. Remove the capillary from the inlet elbow fitting on the pump head.
4. Clean with less than 0.015" diameter wire or replace.
5. Install the capillary by following the above directions in reverse.
6. Re-install the instrument cover.
OPTIONAL ZERO/SPAN AND SAMPLE SOLENOID VALVE REPLACEMENT
Equipment required:
Solenoid Valve (Part No. 7368)
Screwdriver
Wrench - 9/16"
1. Wear an antistatic wrist strap, see “Safety Precautions,” earlier in this chapter for
more information.
2. Disconnect power and remove cover.
3. Unplug the solenoid from Main Power Supply Board.
4. Remove Teflon
®
lines from solenoid.
5. Remove both screws holding the solenoid to the rear panel.
6. Install the solenoid by following the above directions in reverse.
7. Re-install the instrument cover.
8. Perform a leak test as described in Chapter 5, “Preventive Maintenance.”
ANALOG OUTPUT ADJUSTMENT
The analog outputs need only be adjusted if the concentration value on the front panel
display disagrees with the analog outputs. To see if the analog outputs need to be
adjusted, compare the front panel display to the analog output voltage. If they differ by
more than 1%, then the analog outputs should be adjusted. This procedure should only be
performed by an instrument service technician.
1. Wear an antistatic wrist strap that is properly connected to earth ground, see “Safety
Precautions,” earlier in this chapter for more information.
2. Remove the instrument cover.
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