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Thermo Fisher Scientific
Equipment Required:
Vacuum pump
Vacuum gauge
Shut-off valve
WARNING The service procedures in this manual are restricted to qualified
service representatives.
If the equipment is operated in a manner not specified by the manufacturer,
the protection provided by the equipment may be impaired.
Equipment Damage Some internal components can be damaged by small
amounts of static electricity. A properly grounded antistatic wrist strap must
be worn while handling any internal component.
1. Remove the cover.
2. With the instrument running, cap all external ports on the rear panel
except the EXHAUST port.
3. If the instrument is equipped with a permeation oven, activate the
permeation oven from the front panel controls. Refer to the
"Operation" chapter for additional permeation oven operation
information, if necessary.
4. Connect a shutoff valve between the external vacuum pump intake and
the vacuum gauge.
5. Attach the external vacuum pump/vacuum gauge assembly with the
vacuum gauge side to the calibrator EXHAUST port.
6. Apply vacuum until the gauge stabilizes, then trap the vacuum with the
shut-off valve.
Leak Test and Pump Checkout - without Photometer Option
Model 146i Instruction Manual
Servicing
7-13
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Troubleshooting
