Torq-Tronics 2
® /
Owners Manual
15: Calibrating The Torq-Tronics 2
15.1 Overview
This is the recommended process for Calibration Check of the Torq-Tronics 2 tester.
15.2
Required Equipment
To ascertain the required equipment for any given calibration check, look up the capac-
ity of the tester in the Calibration Check Chart below.
Check each piece of equipment to assure the calibration is current. If any piece of the
equipment is past due for calibration, stop, and notify the supervisor or Laboratory
Manager immediately.
Computer with RS232 port and Terminal Software set for: 4800 baud, 1stop bit, 8 data
bits, no hand shake RS-232 Cable (21175)
15.3
Notes on Terminal Software and Tester Use
To send a command to the tester, first enter the command into the terminal software
then press the Enter key. The command is not processed until the enter key is pressed.
To unlock an ‘OVERLOAD’ condition type:
D<enter>
Z <enter> on the PC. (After the 100% point is captured.)
D<enter>
15.4
General Principles for Every Verification
When torque loads are applied, they shall be applied from lower to higher values.
Whenever the direction of torque is changed, the operator must perform apply three (3)
full scale loads to the tester in the new direction prior to recording and measuring torque
values.
15.5 Procedure
15.5.1 Move Torque Tester into the Torque Tester laboratory and allow unit to acclimate over
night, or for a minimum of 12 hours prior to beginning test.
15.5.2 Attach transducer to torque Tester and turn on the power. Allow tester and transducer
to warm up for 10 minutes in Track Mode. Check if any zero offset, rolling or drifting
occurs. If any defects are found, notify laboratory manager.
15.5.3 Bolt unit onto calibration fixture. Torque bolts to the specification below with torque
wrench. Grade 8 (Class 10.9) are required.
Transducer Capacity
Bolt size
Torque
Up to 300 in.lb
#10-32
8 in.lb min
960 – 7200 in.lb
5/16”
75 in.lb min
15.5.4 Connect torque tester serial port to computer serial port via serial cable or with the serial
to USB converter supplied with the unit. Check if computer causes any offsets, rolling
digits, or other problems with the torque tester. If any defects are found, notify manager.
(Note: You may want to consider purchasing an optically isolated RS-232 device to
eliminate ground loops and noise problems.)
15.5.5 Prepare to record torque data from unit under test.
15.5.6 Use appropriate calibration arm and deadweights from the ‘Calibration Check Chart’
found in Appendix B for the unit under test (UUT), to apply three (3) full scale (100%)
loads to the Transducer in the direction of torque to be measured, either clockwise or
counterclockwise. Remove weights, leave calibration arm attached. Wait one (1) minute
and then press the ZERO Switch.
Owners Manual
Torq-Tronics 2
Sturtevant Richmont
Direct: 1 847/455-8677
U.S. Toll-Free: 800/877-1347
www.srtorque.com
11/16/201
7
REV
E
Document Page 19 of 39
