CDI Torque MULTITEST Government - Manual (Page 75)

5-11
Calibration
MULTITEST Indicator Torque/Force Calibration
Improper calibration can result in torque
measurement errors. Follow these procedures
precisely. If an error is made in the procedure, turn
the indicator off and begin again. Users are
responsible for the results of their calibration.
Equipment
• Laboratory grade millivolt meter for calibration measurements
capable of resolving 1/100 millivolts.
• Calibration fixture as shown in Figure 5-1.
Procedure
IMPORTANT
1. With the power off, plug the calibration fixture into the
TRANSDUCER INPUT connector at the back of the
MULTITEST Indicator.
2. Turn the power on. After initialization:
— LED display reads:
NO INPUT
— LCD display reads:
No Transducer Connected
3. Press CAL. LED display reads with least significant digit
(LSD) flashing:
4. Using the DIGIT right and left keys and the up and down
VALUE keys enter the following code into the display:
5. Press ENTER.
— The LCD display reads
Calibrate tester - upper line
STEP 1 Supply mv - lower line
6. Using a laboratory millivolt meter, measure the voltage
across pins 2 (ground) and 19 (gage excitation) of the
calibration fixture.
CODE0000
CODE5111
— The LED display banners the message shown below
followed by the last excitation voltage programmed:
CALIBRATING VOLTAGE (mV)
3023.79 (example voltage)
Example:
3023.79 millivolts