Torque Calibration
British Standard BS 7882:2008: Calibration and Classification of Torque Measuring Devices
• BS 7882:2008 is a standard for calibrating and classifying torque measuring devices.
• Published in 1997, it provides a practical solution for calibration of torque measuring devices.
• It includes technical requirements for high accuracy classes without making calibration too time-consuming or commercially unacceptable.
• Other standards include German standard DIN 51309:2005, an EA reference publication based on DIN 51309, and Chinese calibration standard JJG 995:2005.
• There is no European or International standard for static calibration, but a British standard BS 7996 is being written for continuous calibration of torque measuring devices.
• The torque measuring device is defined as all parts of a system, including electrical, mechanical, hydraulic, or optical torque transducers with associated indicators and cables.
• Calibrations can be performed on analogue or digital devices in torque units or voltage output, in incremental and decrement modes.
• The calibration is performed at an ambient temperature within the range 18°C to 28°C, with the temperature not varying by more than ± 1°C throughout a measurement series.