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Servicing
I/O Expansion Board Replacement (Optional)
I/O Expansion Board
Replacement
(Optional)
7-24
Model 146i Instruction Manual
3. At the Analog Input Cal screen, press
selected in Step 1, and press
4. Press
to scroll to Calibrate Full Scale, and press
The screen displays the current input voltage for the selected channel.
5. Use
and
press
to calibrate the input voltage for the selected channel to the
source voltage.
6. Press
>
Steps 3-5 to calibrate other input channels to the source voltage as
necessary.
Use the following procedure to replace the optional I/O expansion board
(Figure
7-8).
Note After replacing the optional I/O expansion board, calibrate the current
outputs and the analog voltage inputs. See the
on
page 7-21
and the
"Analog Input Calibration"
chapter.
Equipment Required:
I/O expansion board
Nut driver, 3/16-inch
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 instrument OFF, unplug the power cord, and remove the cover.
2. Unplug the I/O expansion board cable from the EXPANSION BD
connector on the motherboard.
.
to enter the source voltage, and
to return to the input channels display and repeat
"Analog Output Calibration"
to scroll to the channel
.
on
page 7-22
in this
Thermo Fisher Scientific
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