Manual

10 UPC5100/UPC5110 Operation & Maintenance Manual
3.3 Zero/Span Calibration
Selecting the ZERO/SPAN position on the Condec Calibration Module (PN 60109) places the instrument into its
ZERO/SPAN calibration mode. The display is shown in Figure 3-2.
Figure 3-2. Zero/Span calibration for Gage-Only Units
The unit needs to be calibrated to only one positive and one bi-directional range. All bi-directional ranges are
calibrated over 0 to +14 PSI and 0 to -14 PSI. All the positive ranges from 0 to 100 PSI. Starting with one of the
instrument’s ranges, perform the steps shown in Table 3-1. Perform the following for each step:
1. Adjust input pressure to the appropriate (either 0 or full-scale) value.
2. Perform the action indicated in Table 3-1 when pressure input readings are stable.
NOTE: A vacuum pump will be required to enable calibrating the -14 PSI of the bi-directional ranges.
Step No.
Pressure Input Value
Operator Action Required
Resulting Calibration Standard
Display Indication
Remarks
(For Bi-directional
range)
+/-30"
Hg
+/-400"
H
2
0
+/-100
kPa
10 PSI
Press ENTER
button
0.000 0.000 0.000 Note 1 below
2 +14 PSI Press ENTER button 28.505 387.95 96.52 Notes 2 & 3
below
30 PSI Press ENTER button 0.000 0.000 0.000 Note 1 below
4 -14 PSI Press ENTER button -28.50
5
-387.9
5
-96.52 Notes 2 & 3
below
Step No.
(For positive direction
range)
Operator Action Required
100
PSI
2700"
H
2
O — Remarks
10 PSI Press ENTER button 0.00 0.00 Note 1 below
2 100 PSI Press ENTER button 100.00 2771.0 Notes 2 & 3
below
Table 3-1. Zero and Span Calibration Sequence