Hello Mohammed!
As far as an international standard, I am unaware of such an item. Most procedures I have seen for a centrifuge are home grown, and are based on specific mfg. specifications.
There are many different centrifuges; notably ones with a speed display, and ones without a speed display. There is typically a temperature indicator which may need to be verified also.
Most of the time what I have seen is 1 of 2 test setups. First, a disc or a fixture is attached to the main spindle with a piece of reflective tape on it. Usually, you will probably want to use clear tape to hold the reflective tape, due to the high speeds sometimes throwing the reflective tape off. Second, you can find a place on the shaft and attach the piece of reflective tape (again, with clear tape on top of that). Then using a hand-held tachometer, one can measure the RPM of the centrifuge. That reading is then compared to the display, or the mfg. specification for the speed is verified (within appropriate tolerance range).
The temperature could then fall into removing the sensor and placing into an appropriate test environment, or placing a standard probe next to the centrifuge temperature probe and compare.
This is fairly general for calibration. The instruction manual for the centrifuge is really your best bet. Along with calibration, there are maintenance checks for the motors, gaskets, and other parts on the centrifuge.
Depending on the mfg., many have service manuals for the equipment you can purchase. They are not cheap, but may give you the help you need.
Hope that helps.
