Chapter Five: Maintenance and Troubleshooting General Information
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Chapter Five: Maintenance and Troubleshooting
General Information
If the 250 instrument fails to operate properly upon receipt, check for shipping damage, and
check the cables for continuity. Any damage should be reported to the carrier and MKS
Instruments immediately. If it is necessary to return the unit to MKS, obtain an ERA number
(Equipment Return Authorization Number) from a MKS Service Center before shipping. Please
refer to the inside back cover of this manual for a list of MKS Calibration and Service Centers.
Maintenance
Periodically check for wear on the cables and inspect the enclosure for visible signs of damage.
How To Clean the Unit
Periodically wipe down the unit with a damp cloth.
How To Replace the Fuses
The line fuses protect the internal circuitry; both sides of the line are fused. The fuse values are:
115 VAC 0.50 A (T) / 250 V / 5 x 20 mm
230 VAC 0.25 A (T) / 250 V / 5 x 20 mm
Caution
Disconnect the line cord from the AC power outlet before replacing
the fuse.
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