Instruction Manual

24 UPS3000/UPS3110/UPS3210 Operation and Maintenance Manual
3.7.1 For UPS3000/UPS3210 Absolute/Gage Switch Selectable Units ONLY
If the current barometric pressure is below 14.7 PSIA, the offset is positive, see Example 1. If the current
barometric pressure is above 14.7 PSIA, the offset is negative, see Example 2. If the current barometric pressure
is 14.7 PSIA, then no offset is needed.
Example 1:
If the current barometric pressure is lower than 14.70 PSIA, subtract the current barometric pressure from 14.70.
14.70 PSI: UPS3110 reference point
-14.55 PSI: Current barometric pressure
0.15 PSI: Positive Delta Offset
Complete the following steps
NOTE: UPS3000 refer to Figure 2-1 on page 5 and Figure 2-4 on page 6. UPS3210 refer to Figure 2-3 on page 6 and
Figure 2-6 on page 8.
1. Connect Test Standard to UPS3000/UPS3210 Input Port similar to Figure 3-1 on page 19.
2. Open the vent valve connected between Test Standard and UPS3000/UPS3210.
3. Using the RANGE SELECT switch (6), select the lowest pressure range on the UPS3000/UPS3210.
4. Press the ENTER push-button, as shown in Figure 3-2 on page 20, on the UPS3000/UPS3210. The
display reads zero. Repeat this step for the middle and high ranges.
5. Close the vent valve connected between Test Standard and UPS3000/UPS3210. Select the lowest
pressure range of the UPS3000/UPS3210.
6. Input a pressure into the UPS3000/UPS3210 until the display reads the value of the Positive Delta
Pressure, 0.15 PSI as in this example.
7. Depress the ENTER push-button on the UPS3000/UPS3210. The display reads zero. Without touching the
input pressure repeat this step for the middle and high ranges.
8. 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.
9. With UPS3000/UPS3210 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.
10. Depress the ENTER push-button. The display will respond with “[] [] [] [] [] []” until the button is
released.
11. 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).
12. Depress the DATA ENTER switch, S2, located approximately in the middle of the circuit board. See Figure
2-7 for the switch location.
13. 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.
14. 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. The Test Standard may now be
disconnected.