I/O Expansion Board (Optional) Replacement - Thermo Scientific 48i Instruction Manual

Servicing

I/O Expansion Board (Optional) Replacement

I/O Expansion Board
(Optional)
Replacement
7-34 Model 48i Instruction Manual
TEMP) on the measurement interface board, and enter the temperature
reading. ▲
A 1 °C change corresponds to a ±5% change in resistance, thus this
alternative procedure can be quite accurate as a check; however, it clearly is
not NIST traceable. ▲
3. From the Main Menu, choose Service > Temperature Calibration.
The Calibrate Ambient Temperature screen appears.
Note If Service Mode is not displayed, refer to
Mode" on page 7-4, then return to the beginning of this step.
4. Wait at least 10 seconds for the ambient reading to stabilize, use
and
press to save the temperature value.
5. Install the cover.
Use the following procedure to replace the optional I/O expansion board
(Figure 7–15).
Note After replacing the optional I/O expansion board, calibrate the
current outputs and the analog voltage inputs. See
Calibration" on page 7-30
this 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 the instrument OFF, unplug the power cord, and remove the
cover.
"Accessing the Service
to enter the known temperature, and
and "Analog Input Calibration" on page
▲
"Analog Output
7-31
▲
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