Honeywell VXP, System Maintenance Manual, Page: 48 / 105

4-4 Honeywell
Maintenance
4.2.1.5 Photocell
The Photocell should be inspected per Table 4-6.
4.2.1.6 Cables
All Cables should be inspected per Table 4-7.
4.3 FUNCTIONAL TESTS
This section contains instructions to test the VXP system performance parameters. If a test step
fails, refer to the “Troubleshooting Guide” in Section 4.4 to locate the faulty component.
The functional tests provide a high confidence level that the instrument is operating properly and
within specifications. The functional test setups use, as much as possible, all the components
(transducers, cables, etc.) that are used in the field. This allows the user to verify the proper
operation of these components and aids in fault isolation.
4.3.1 Test Setup
Connect equipment as shown in Figure 4-1.
Table 4-6. Photocell Inspection
Inspection Remedy
Inspect the cable connector for bent or broken
pins. Return to Chadwick-Helmuth for repair.
Inspect the light aperture for dirt or
obstructions. Clean with water or alcohol and a soft, lint-
free cloth.
Inspect housing for loose screws. Remove any loose screws and apply Loctite
before reinstalling them.
Table 4-7. Cable Inspection
Inspection Remedy
Inspect the cable for breaks, tears, fraying,
burrs, or other damage. Repair or replace the cable as necessary. See
Chapter 5.
Check connectors for bent and/or broken pins,
corrosion, arcing, or other damage. Repair or replace the cable as necessary. See
Chapter 5.