Snap-On 5000-3 - Manual (Page 35)

TORQUE CALIBRATION SYSTEM SETUP CHAPTER 4
Adjustable or Preset “Click” 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 (F3) then Select Unit to select the desired engineering unit of measure as
displayed on the display. It is easiest to match that of the tool under test.
3. Press Setup Select Mode to select TRACK mode.
4. Adjust the tool for maximum “click” setting. Install the tool on the torque transducer-
loader. Slowly apply torque using the loader crank handle until the tool clicks or the
SURETEST displays 100% of the full-scale capacity 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 MODE to select FIRST PEAK mode.
When testing “click” screwdrivers, it may be easier to use the PEAK HOLD mode on
the SURETEST to capture the maximum applied torque reading.
7. If featured, adjust the micrometer or preset knob on the tool to the first check point
recommended by the manufacturer, or the desired working torque, or approximately 70%
of its full scale torque.
8. Reinstall the tool and apply torque until the wrench “clicks.”
9. Release the torque and note the FIRST PEAK or PEAK HOLD reading. The
percentage difference between the SURETEST reading and tool setting should not be
greater than the sum of their respective accuracies.
Example:
When the tool accuracy is 4%, and the SURETEST accuracy is 0.25%, then readings
should be within ±4.25%.).
10. CLEAR the display and reapply torque for each of the remaining checkpoints
recommended by the tool manufacture. If no recommendation is available, test at
minimum torque, 60% and 100% of full scale.
11. Repeat steps 4 through 10 in the opposite direction, if required.
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