Chapter Six: Maintenance General
47
Chapter Six: Maintenance
General
In general, no maintenance is required other than proper installation and operation, and zero
adjustment. If a controller fails to operate properly upon receipt, check for shipping damage, and
check the power/signal cable for correct continuity. Any damage should be reported to the
carrier and MKS Instruments immediately. If there is no obvious damage and the continuity is
correct, obtain an ERA Number (Equipment Return Authorization Number) before returning the
unit to MKS Instruments for service.
Zero Adjustment
For best accuracy and repeatability, you should check the zero setting periodically and reset it, if
necessary. Refer to
How To Zero the Flow Controller
, page 40, for instructions on setting the
zero. The frequency of checking the zero is dependent on the specific accuracy and repeatability
required by your process. It is also recommended that the instrument be recalibrated annually if
no other time interval has been specifically established. Refer to the inside of the back cover of
this instruction manual for a complete list of MKS Calibration and Service centers.