Warning – Snap-On 5000-3 User Manual
Page 34
TORQUE CALIBRATION SYSTEM SETUP
CHAPTER 4
Dial and Bending Beam Torque Wrenches and Screwdrivers
Be sure the SURETEST transducer is capable of handling the intended torque to avoid
damaging the transducer.
WARNING
Do not use this equipment with the power off. Always turn on the Base Unit so the
torque values are indicated on the display.
1.
To program the SURETEST Base Unit refer to Chapter 3 Set Up and Programming to
use HIGH and LOW limit alert, data STORE, display CLEAR, printer SEND and
STATistical analysis features.
2.
Press Setup then Select Unit to select the desired engineering unit of measure on the
display. It is easiest to match that of the tool under test.
3.
Press Setup then Select Mode to select TRACK mode.
4.
Install the tool onto the torque transducer-loader. Slowly apply clockwise (CW) torque
using the Loader crank handle until the indicator displays the full scale torque for the
tool. Release the torque and repeat twice again to exercise the tool and the transducer.
When applying torque by hand, make sure to hold the drive end of the tool perfectly in
line with the transducer drive to minimize side loading errors.
5.
Remove the tool from the transducer-loader and press Zerotare.
6.
Press
Setup then Select Mode to select PEAK HOLD mode.
7.
Reinstall the tool and slowly apply CW torque to the first checkpoint or calibration point
recommended by the manufacturer. If the point is not specified, use the desired working
torque or about 70% of full scale.
8.
Read the tool display. The percentage difference between the SURETEST and tool
readings should not be greater than the sum of their respective accuracies.
Example:
When tool accuracy is 4% and SURETEST System accuracy is 0.25%, readings should
be within ±4.25%.
9.
Release the torque, CLEAR the display, and reapply torque for each of the remaining
check points recommended by the tool manufacturer. If no recommendation is available,
check at 20%, 40%, 60%, 80% and 100% of the tool’s full scale.
10.
Repeat steps 4 through 9 in the counter clockwise (CCW) direction.
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