Preamp Board Calibration - Thermo Scientific 48i Instruction Manual

Servicing

Preamp Board Calibration

Preamp Board
Calibration
Pump Replacement
7-20 Model 48i Instruction Manual
Note If Service Mode is not displayed, refer to
Mode" on page 7-4, then return to the beginning of this step.
8. Calibrate the instrument. Refer to the "Calibration" chapter in this
manual.
Use the following procedure to calibrate the preamp board.
Equipment Damage This adjustment should only be performed by an
instrument service technician.
1. Let the instrument sample zero air for about 90 minutes.
2. From the Main Menu, choose Service > Preamp Board Calibration.
The Preamp Board Cal screen appears.
Note If Service Mode is not displayed, refer to
Mode" on page 7-4, then return to the beginning of this step.
3. At the Preamp Board Cal screen, use
Sample or Reference value reads more than 150,000 then press
to save the value.
Use the following procedure to rebuild the pump
Equipment Required:
Pump
Nut driver
Philips screwdriver, #2
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. Turn the instrument OFF, unplug the power cord, and remove the
cover.
"Accessing the Service
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"Accessing the Service
(Figure
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until either the
7–10).
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