CDI Torque MULTITEST Government - Manual (Page 69)

5-5
Calibration
Quick Check
Always be alert to the potential for personal injury
that may be caused by excessive torque
applications, careless handling of heavy weights,
and out-of-balance or unsafe weight distribution.
1. With the MULTITEST Indicator ON, select TORQUE
measurement, TRACK mode, and select the UNITs of
measure appropriate to the transducer as specified in the
calibration check point table in this chapter.
2. Install the transducer to be checked and allow a 5 minute
warm up period to stabilize the electronic circuits and
transducer elements.
3. Transducers are mounted vertically for calibration as
instructed in Mounting Details in this chapter. Mount the
4-in-1 transducer to a sturdy bench using the bracket
provided. Mount single transducers vertically using
the accessory stand and block. Attach the specified
torque test bar, wheel or butterfly, secured with its drive
retention screw, and install the specified hanger for
clockwise (CW) torque application.
4. Apply and remove the full range torque for the transducer
three times.
5. Remove the weights and hanger, but leave the arm
attached, and wait approximately 30 seconds then press
ZERO TARE.
6. At each of the check points specified for the transducer
in the calibration check point table (in this chapter), apply
torque in the CW direction and verify the display
readings are within 0.25% of applied torque. If any
reading is out of specification, proceed to Calibrating
MULTITEST Torque/Force Transducers in this chapter.
7. Repeat Steps 3 through 6 in the counter clockwise
(CCW) direction.
When using the 2-1/2" or 5" test wheel, a small “S”
hook is supplied to provide a positive zero bias in the
direction (CW or CCW) that the calibration is
performed. Do not remove the “S” hook P/N 2000-151-4
when setting zero tare.
WARNING