We have recently been advised that we need to calibrate the light meter that we monitor lighting levels with around our production facility. However I am unaware of how this can be done. I imagine as with the other testing tools we use here, when we send them away for calibration and it can be an expensive exercise. So for a handheld light meter that is worth about $100 this seems not to be the best option. I guess we could just purchase a new light meter annually to meet the calibration requirements; however this seems very wasteful to me. Has anyone encountered this before, or have any knowledge of how we may be able to meet the requirement?
Any assistance is greatly appreciated.