Time：2025-09-18
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The tool used to calibrate an electric torque screwdriver is called a calibrator. Calibrators can generally be divided into two types: integrated calibrators and split-type calibrators.
An integrated calibrator refers to a device where the display instrument and sensor shaft are combined into one unit.
Features: Compact size, easy to carry.
As the name suggests, the display instrument and sensor are separate, and they are connected by a cable during use.
Features: Convenient for reading during calibration, and easy to maintain and repair.
The accuracy of calibrators is typically ±0.5%.
There are two methods for calibrating electric torque screwdrivers: static calibration and dynamic calibration.
This is a simple and practical calibration method. To use this method, the user needs a high-precision digital torque wrench.
After the electric torque screwdriver enters the static torque calibration mode, use the wrench to tighten the target head that needs calibration. Then, compare the torque value displayed on the shaft control unit with the value shown on the wrench.
For this type of torque screwdriver, if performed correctly, static calibration can be very accurate. Try it several times to check consistency. Generally, if the operator is not skilled, there may be some difference between the two readings. This is not a problem—as long as the deviation is small or relatively constant, it proves that the electric torque gun is reliable.
If you don’t have a digital torque wrench but do have a shaft-type calibrator, you can connect the calibrator to the tightening head first, then use a regular wrench to tighten the calibrator. After that, compare the value on the calibrator with the value displayed on the shaft control unit.
Dynamic calibration is a more reliable method for calibrating electric torque screwdrivers, but it is more complicated to perform.
When using this method, if there are multiple shafts, you will need multiple shaft-type calibrators to calibrate them simultaneously. However, this can be very expensive for users. Therefore, we provide calibration accessories.
During calibration, place the calibrator on the shaft to be calibrated, and place accessories on the other shafts. After setup, you can proceed with calibration without entering static calibration mode. If each shaft has a calibrator, simply press the start button on the operation box to begin a normal automatic tightening process. Then, compare the torque values from the calibrator and the corresponding shaft control unit to see if they match.
If you only have one calibrator, follow these steps:
A. Set the shaft selection switch on the operation box to the shaft you want to calibrate.
B. Connect the calibrator to the shaft to be calibrated.
C. Place an accessory on the diagonal shaft or another shaft.
D. Press and hold the forward rotation button on the operation box panel (do not release until the system stops automatically). Then, compare the value displayed on the calibrator with the value on the shaft control unit to check for any discrepancy.
During calibration, if a large discrepancy is found and it does not meet production requirements, the electric torque screwdriver may need to be adjusted.
Note: Any adjustment must be approved by a technician. Do not attempt to operate it yourself to avoid damaging the electric torque screwdriver or affecting product quality.
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