CDI Torque SURETEST Torque Calibration System - Manual (Page 50)

CALIBRATION CHAPTER 5
5-49
Torque Calibrations
SURETEST New Transducer Calibration
Improper calibration can result in torque measurement errors. Follow these procedures precisely.
If an error is made in the procedure, turn the Suretest off and begin again. Users are responsible for
the results of their transducer calibration.
SURETEST series Torque transducers can only be calibrated using the SURETEST Base Unit.
Calibration data is calculated and then stored in the FLASH memory chip of the transducer by the
microcontroller in the Indicator.
WARNING
Always be alert to the potential for personal injury and equipment damage that may be
caused by excessive torque applications, careless handling of heavy weights, and out-of-
balance or unsafe weight distribution.
Equipment
• Precision test arms and certified calibration weights.
• Test stand.
Procedure
1. Turn the SURETEST ON. Refer to the calibration check point table in this chapter for the
transducer calibration check points, as well as the specified arms, hangers and weights.
2. Install the transducer being calibrated and allow a 5 minute warm up period to stabilize the
electronic circuits and transducer elements.
3. Mount the 4-in-1 transducer upright, drives horizontal, as shown in Figure 5-3, or mount
single transducers horizontally using the accessory stand and block as detailed in Figure 5-2.
Attach the specified torque arm, secured with the drive retention screw, and install the
specified hanger for clockwise (CW) torque application. Use the “S” hook on the 2-1/2" or 5" bars.
4. Apply and release full scale torque to the transducer three times in the CW direction, then remove
the weights and hanger. Leave the torque arm installed. Press Soft Key Setup to select Setup
Menu.
5. Use DOWN Cursor key to scroll down to Calibration Item. Press ‘ENTER’.