Instruction Manual

Calibration and Adjustment Procedure 27
value of the Negative Delta Pressure, -0.05 PSI as in this example.
6. Depress the ENTER push-button on the UPS3110. The display reads zero. Without touching the VERNIER
(11) knob repeat this step for the middle and high ranges.
7. Using the STEPPER push-button, as shown in Figure 3-2 on page 20, place the unit into SHUNT RESISTOR
CALIBRATION mode. The display will be as shown in Figure 3-5 on page 23.
8. With UPS3110 RANGE SELECT switch (6) switched in the high range, depress the ZERO push-button on
the front panel. Verify that the display reads 0.00. Upon release of the push-button the display will be as
shown in Figure 3-5 on page 23.
9. Depress the ENTER push-button. The display will respond with “[] [] [] [] [] []” until the button is
released.
10. Pressing the STEPPER push-button bring the indicator back to its initial Data Recall display condition as
shown in
Figure 3-2 on page 20. The display shows 1 XXX (three arbitrary digits).
11. Depress the DATA ENTER switch, S2, located approximately in the middle of the circuit board. See Figure
2-7 for the switch location
12. If the data is accepted, the three-digit number on the right side of the display will indicate 377 for as long
as the DATA ENTER switch, S2, is depressed.
13. The barometric offset is now complete and CALIBRATE/OPERATE switch, S3, must be returned to its
normal operating positions as shown in Table 3-1 on page 20.