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ACCoupleOffsetCalibration-PAXH
It is recommended that Input Calibration be performed first.
1. With meter power removed, set the Input Range Jumper for 20 V, the Couple
Jumper for DC, and set the Signal Jumper for voltage by removing the jumper.
2. Connect a wire (short) between Volt (terminal 6) and COMM (terminal 4).
3. Apply meter power.
4. In Module 1, program as follows: Range: ??? ; Couple: ?? ; Decimal Point:
? ; Round: ? ; Filter: ??? ; Band: ?? ; Points: ? ; Style: ??? ; INP1: ????? ; DSP1:
? ; INP2: ?????? ; DSP2: ?????
5. In Module 4, program as follows: Hi-t: ??? ; Lo-t: ??????
6. Press PAR then DSP to exit programming and view the Input Display.
7. The readout displays the DC coupled zero input, record the value.
8. Remove the meter power and set the Couple Jumper to AC by removing the
jumper.
9. Maintaining the short between terminals 4 and 6, reapply the meter power.
10. Keeping all programming the same, view the Input Display.
11. The readout now displays the AC coupled zero input, record the value.
12. In Module 9, Use the arrow keys to display ???? ?? and press PAR .
13. Press the down arrow key twice to ????? and press PAR .
14. Calculate the offset ????? using the following formula:
????? = AC coupled reading (step 11) - DC coupled reading (step 7)
15. Use the arrow keys to enter the calculated ????? .
16. Press PAR three times, to exit programming.
17. Remove the meter power and remove the short from terminals 4 and 6.
18. Restore the original jumper and configuration settings.
PAXS - Input Calibration
WARNING: Calibration of this meter requires a signal source with an
accuracy of 0.01% or better and an external meter with an accuracy of
0.005% or better.
Before starting, connect -SIG (terminal 4) to COMM (terminal 5).
This allows a single ended signal to be used for calibration. Connect the
calibration signal to +SIG (terminal 3) and -SIG (terminal 4). Verify the Input
Range jumper is in the desired position. Allow a 30 minute warm-up period
before calibrating the meter. ?? and PAR can be chosen to exit the calibration
mode without any changes taking place. Perform the following procedure:
1. Press the arrow keys to display ???? ?? and press PAR .
2. Choose the range to be calibrated by using the arrow keys and press PAR .
3. When the zero range limit appears on the display, apply 0 mV between +SIG
and -SIG.
4. Press PAR and ---- will appear, wait for next prompt.
5. When the top range limit appears on the display, apply the corresponding
+SIG and -SIG voltage (20 mV or 200 mV).
6. Press PAR and ---- will appear, on the display for about 10 seconds.
7. When ?? appears, press PAR twice to exit programming.
8. Repeat the above procedure for each range to be calibrated or to recalibrate
the same range. It is only necessary to calibrate the input ranges being used.
9. When all desired calibrations are completed, remove -SIG to COMM
connection and external signal source.
10. Restore original configuration and jumper settings.
PAXT - Input Calibration
Warning: Calibration of this meter requires precision instrumentation
operated by qualified technicians. It is recommended that a
calibration service calibrates the meter.
Before selecting any of the calibration procedures, the input to the meter
must be at 0 mV or 0 ohms. Set the digital filer in Module 1 to 1 second. Allow
a 30 minute warm-up period before calibrating the meter. The ?? and PAR can
be chosen to exit calibration mode without any changes taking place.
10 OHM RTD Range Calibration
1. Set the Input Range Jumper to 10 ohm.
2. Use the arrow keys to display ???? ?? and press PAR . Then choose ????
and press PAR .
3. At ? ? , apply a direct short to input terminals 3, 4 and 5 using a three wire
link. Wait 10 seconds, then press PAR .
4. At ?? ? , apply a precision resistance of 15 ohms (with an accuracy of 0.01%
or better) using a three wire link, to input terminals 3, 4 and 5. Wait 10
seconds, then press PAR .
5. Connect the RTD, return to the Display Mode and verify the input reading
(with 0 Display Offset) is correct. If not correct repeat calibration.
30
100 OHM RTD Range Calibration
1. Set the Input Range Jumper to 100 ohm.
2. Use the arrow keys to display ???? ?? and press PAR . Then choose ?????
and press PAR .
3. At ? ? , apply a direct short to input terminals 3, 4 and 5 using a three wire
link. Wait 10 seconds, then press PAR .
4. At ??? ? , apply a precision resistance of 300 ohms (with an accuracy of
0.01% or better) using a three wire link, to terminals 3, 4 and 5. Wait 10
seconds, press PAR .
5. Connect the RTD, return to the Display Mode and verify the input reading
(with 0 Display Offset) is correct. If not correct repeat calibration.
THERMOCOUPLE Range Calibration
1. Use the arrow keys to display ???? ?? and press PAR . Then choose ?? and
press PAR .
2. At ??? ? , apply a dead short or set calibrator to zero to input terminals 4 and
5. Wait 10 seconds, then press PAR .
3. At ???? ? , apply 50.000 mV input signal (with an accuracy of 0.01% or
better) to input terminals 4 and 5. Wait 10 seconds, then press PAR .
4. Return to the Display Mode.
5. Continue with Ice Point Calibration.
ICE POINT Calibration
1. Remove all option cards or invalid results will occur.
2. The ambient temperature must be within 20 ° C to 30 ° C.
3. Connect a thermocouple (types T, E, J, K, or N only) with an accuracy of 1 ° C
or better to the meter.
4. Verify the readout Display Offset is 0, Temperature Scale is ° C, Display
Resolution is 0.0, and the Input Range is set for the connected thermocouple.
5. Place the thermocouple in close thermal contact to a reference thermometer
probe. (Use a reference thermometer with an accuracy of 0.25 ° C or better.)
The two probes should be shielded from air movement and allowed sufficient
time to equalize in temperature. (A calibration bath could be used in place of
the thermometer.)
6. In the Normal Display mode, compare the readouts.
7. If a difference exists then continue with the calibration.
8. Enter Module 9, use the arrow keys to display ???? ?? and press PAR . Then
choose ??? and press PAR .
9. Calculate a new Ice Point value using: existing Ice Point value + (reference
temperature - Display Mode reading). All values are based on ° C.
10. Enter the new Ice Point value.
11. Return to the Display Mode and verify the input reading (with 0 Display
Offset) is correct. If not correct repeat steps 8 through 10.
ANALOG OUTPUT CARD CALIBRATION
Before starting, verify that the precision voltmeter (voltage output) or current
meter (current output) is connected and ready. Perform the following procedure:
1. Use the arrow keys to display ???? ?? and press PAR .
2. Use the arrow keys to choose ??? and press PAR .
3. Using the chart below, step through the five selections to be calibrated. At
each prompt, use the PAX arrow keys to adjust the external meter display to
match the selection being calibrated. When the external reading matches, or
if this range is not being calibrated, press PAR .
SELECTION EXTERNAL METER ACTION
????? 0.00 Adjust if necessary, press PAR
????? 4.00 Adjust if necessary, press PAR
?????? 20.00 Adjust if necessary, press PAR
???? 0.00 Adjust if necessary, press PAR
????? 10.00 Adjust if necessary, press PAR
4. When ?? appears remove the external meters and press PAR twice.
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