Servicing
Chopper Motor Replacement
Thermo Electron Corporation Model 48i Instruction Manual 7-13
7. Let the instrument sample zero air for about 90 minutes.
8. From the Main Menu, press to scroll to Service > press >
to scroll to Initial S/R Ratio> and press .
The Initial S/R Ratio screen appears.
If the Service Mode is not displayed on the Main Menu, use the
following procedure to display it.
a. At the Main Menu, press to scroll to Instrument Controls >
press > to scroll to Service Mode > and press .
The Service Mode screen appears.
b. Press to toggle the Service Mode to ON.
c. Press > to return to the Main Menu.
d. Continue the procedure at Step 6 to access the Initial S/R Ratio
screen.
9. At the Initial S/R Ratio screen, press to select set the initial S/R
ratio to the value of the current ratio and press to store the value. The
initial S/R ratio should be between 1.14 and 1.18.
10. Calibrate the instrument.
Chopper Motor
Replacement
Use the following procedure to replace the chopper motor (Figure 7-6).
Equipment Required:
Chopper motor
Allen wrenches, 5/32-inch and 5/64-inch
Flatblade screwdriver
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.
To Next Page
Loading...
