7-1-1. Operating Temperature
Measuring should be conducted at temperature in 18-28°C range. Temperature fluctuation
should be within ±1°C.
7-1-2. Check the Following before Calibrating the Torque Screwdriver.
(1) Torque screwdriver tester should be set at stable working table.
(2) For calibration of direct reading torque screwdriver, make sure to read the value from
upright position to avoid reading errors by angle.
(3) For calibration of click-type torque screwdriver (RTD/LTD), apply training torque at the
maximum value for 5 times without measuring prior to the official calibration. Do the same
training for the other direction as well.
(4) For calibration of direct reading torque screwdriver (FTD, STC), apply training torque to the
max torque value once and release the torque. Then set the digital display back to zero.
Repeat the same procedure for the other direction as well.
7-2. Attention for Measuring Torque Screwdrivers
(1) For measuring click-type torque screwdrivers (RTD/LTD), apply torque slowly and evenly.
Except for preset type (such as RNTD/NTD), click-type torque screwdrivers (such as
RTD/LTD) must measure from the lower point, and adjust to respective torque value.
(2) For measuring direct-reading type torque screwdriver (FTD/STC, etc), use torque
screwdriver tester to apply torque to the measurement value. If the applied torque exceed
the measurement point, it needs to be redone.
* LTA loading device is an optional kit.
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7
Measuring a Torque Screwdriver (Recommended)
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