Optical Bench Temperature Calibration - Thermo Scientific 49i Instruction Manual

Servicing

Optical Bench Temperature Calibration

Optical Bench
Temperature
Calibration
7-26 Model 49i Instruction Manual
5. Perform the previous steps in reverse to install the new optical bench.
6. Calibrate the instrument. Refer to the "Calibration" chapter in this
manual.
Use the following procedure to calibrate the optical bench temperature.
Equipment Required:
Calibrated thermometer or 10K ±1% Resistor
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 instrument cover.
2. Tape the thermistor (plugged into the measurement interface board) to a
calibrated thermometer.
Note Since the thermistors are interchangeable to an accuracy of ±0.2 °C,
and have a value of 10K ohms at 25 °C, an alternate procedure is to connect
an accurately known 10K resistor to the thermistor input (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, press
to scroll to Temperature Calibration > and press
to scroll to Service > press
Thermo Fisher Scientific
>
.