Norbar torque wrench calibration

[tscalfa]

I've got a Norbar torque wrench that I would like to calibrate and adjust if required. My other torque wrench has hex socket screw for adjusting the calibration on the Norbar one pictured I can't see any obvious way to adjust it. Does anyone know how to adjust the calibration on Norbar torque wrenches? I have included a couple of photos of my torque wrench.

[Krikkit]

Yours looks slightly different to the latest version (which I have), but I believe the adjust is built into the handle, and would need the end-cap removing to access: https://www.norbar.com/exploded_drawings/130103.pd...

I'd probably just send it to Norbar as they do a calibration service.