10 UPC5000/UPC5010 Operation & Maintenance Manual
Figure 3-3. Linearity and Hysteresis Calibration
Starting with the instrument’s lowest pressure range, sequentially perform the thirteen steps described in
Table 3-2, for each pressure range being calibrated. Perform the following for each step:
1. Adjust input pressure to the appropriate value without overshooting the setting. If value is overshot, vent
unit and repeat steps.
2. Perform the action as indicated when the readings are stable. On units below 2000 PSI it should not take
longer than five minutes. Units above 2000 PSI and all absolute only units should take no longer than
fifteen minutes. If it is taking longer, check system for leaks. If no leaks are found, the CPU or transducer
may be defective.
When Step 11 is reached, the display changes so that the left most status symbol is H. This remains for Step 12
and down to approximately 0.00 PSI.
Step Input Pressure % of Range Operator Action Required
Status Symbol in
Left-most Digit
Remarks
10 (see note 4 below) Press ZERO switch L Zero on display
210Press ENTER button L Notes 1 & 2 below
320Press ENTER button L Notes 1 & 2 below
430Press ENTER button L Notes 1 & 2 below
540Press ENTER button L Notes 1 & 2 below
650Press ENTER button L Notes 1 & 2 below
760Press ENTER button L Notes 1 & 2 below
870Press ENTER button L Notes 1 & 2 below
980Press ENTER button L Notes 1 & 2 below
10 90 Press ENTER button L Notes 1 & 2 below
11 100 No Action Required H Note 3 below
12 50 Press ENTER button H Notes 1 & 2 below
13 0 (see note 4 below) No Action Required L
Table 3-2. Linearization and Hysteresis Calibration Sequence
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