The Class 1–4 Test Jig is a Norbar‑designed torque verification unit.
It is used to provide pre‑dive, topside confirmation of torque‑tool calibration. The unit consists of a standard ISO Class 1–4 torque‑reaction bucket with a sturdy base and a built‑in torque sensor.
The Test Jig Transducer system is delivered as a complete kit (instrument/load cell + test jig).
The verification unit is calibrated once a year and offers Class 1 accuracy (±0.5% of reading from 20% to 100% of full scale).
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