Anyone know if theres a national standard to calibrate to for a colorimeter and a spectrophotometer? Lab in our anodize plant has one of each not in the system. Department head told me there is no calibration technique for the colorimeter and that the spectrophotometer is calibrated each time it is used. I found this during last weeks ISO cert audit (they did not find it). I called the producer of these instruments and they said the can calibrate them to the manufacturers spec. Under ISO9001 if theres no known traceable standard you can document your own cal procedure/standard but does this apply if theres a manufacturers calibration ?
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