4-6
PC100 Series
Installation and Operation Manual
X-PR-PC100-Series-PC-eng
Part Number: 541B207AAG
May, 2017
Section 4 Maintenance & Troubleshooting
Table 4-2 PC100 Series Troubleshooting Guide (Continued)
Symptoms & Possible Causes
Corrective Action
8. OEM tool does not read correct PC100 Series
pressure or flow meter
zero reading.
Is the differential pressure across the
PC100 Series valve leakage.
PC100 Series really zero?
Incorrect MFC zero.
Is the PC100 Series mounted in the proper attitude?
Is the flow output signal of the PC100 Series
really zero?
9. Zero Drift.
Improper zero of the PC100 Series?
PC100 Series aging or sensor stabilization.
Excessive Valve leakage?
Zero is not correct.
10. PC125 Flow Meter Calibration Drift.
Gas box temperature too high?
Zero is not correct.
Is it linear offset?
11. PC100 Series indicates Overshoot.
Additional PID adjustments may be required
Contact the factory for support.
per the application.
12. Tool display output doesn’t match PC125 Series flow meter output.
Improper zeroing of the PC125 flow meter?
Check PC125 Series zero.
