Owner manual

PN: 1763 Rev C, 4/2004
Page 5 of 8
C R Y S T A L
engineering corporation
6. Check the kPa pressure points shown on Table 2. Adjust R12 if necessary to bring the
readings to within the tolerances shown on Table 2.
7. Set the switch on the MultiCal to the PSI position.
8. Test the MultiCal at the 30 PSI point. The reading should be within the tolerance shown in
Table 2. If not, adjust R15 until both points are within specification.
9. In the unlikely event that you are unable to adjust the MultiCal so that all of the points
meet the tolerances of Table 2, contact Customer Service for assistance. Do not readjust
linearity. The linearity adjustment is factory set and should never require readjustment,
unless the sensor is replaced.
Figure 1: Potentiometer Locations
FINE ZERO
kPa
PSI
COARSE ZERO
-
LINEARITY
R1
R12
R15
Table 2: Readings in mV @ 23°C ±5°C
True Pressure Acceptable Output (mV)
100 kPa 99.92 to 100.07
200 kPa 199.87 to 200.12
30 PSI 29.98 to 30.03
Specifications
The following specifications apply at 23°C, ±5°C for 1 year after calibration, and when
used with measuring devices having 10MΩ input impedance, or shunted so that their input
impedance is 10MΩ. Also, the module must be "zeroed" prior to taking measurements to
achieve the pressure specifications.