Application - HBM TTS Mounting Instructions

3

Application

1)
Guideline DKD‐R 3‐8 "Statische Kalibrierung von Kalibriereinrichtungen für Drehmoment­
schraubwerkzeuge" (Static calibration of calibrating devices for torque tightening tools), pub­
lished by the German Calibration Service.
2)
Guideline DKD‐R 3‐7 "Statische Kalibrierung von anzeigenden Drehmomentschlüsseln" (Static
calibration of indicating torque wrenches), published by the German Calibration Service.
TTS
The transfer torque wrench is used as a transfer stan­
dard for calibrating torque wrench calibrating devices.
Generally, when a torque wrench calibrating device is
used, torque is generated by exerting force on the lever
of the torque wrench to be calibrated (e.g. the triggering
torque wrench to be used in the workshop). When cali­
brating the torque wrench calibrating device, on the other
hand, a transfer torque wrench (the indicating torque
wrench) is inserted into the calibrating device instead of a
torque wrench in need of calibration. The torque is gener­
ated in the same way as for normal use, so that the mea­
surement conditions for the calibrating device are identi­
cal. This is of particular importance with respect to the
parasitic loads acting at the same time as the actual cali­
bration torque, namely lateral force and bending moment.
The design of the TTS transfer torque wrench is adapted
to German Calibration Service guideline DKD‐R 3‐8
which regulates the calibration of torque wrench calibrat­
ing devices.
To conform to the strict requirements regarding the trace­
ability of a transfer standard, a transfer torque wrench
must be calibrated in an accredited calibration laboratory
(in Germany, this is a DKD laboratory). The DKD calibra­
tion certificate in accordance with guideline DKD‐R 3‐7
has to be ordered separately.
A1571-3.0 HBM: public
Application
1)
,
2)
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