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Setting Temperature with Known
Thermo Fisher Scientific
3. From the Permeation Oven menu, in the Service menu, select Cal Gas
Thermistor > Water Bath. Enter the thermistor temperature from the
thermometer and press
SAMPLE
CAL GAS THERM (BATH):
CURRENTLY:
RANGE
Figure 9-2. Cal Gas Therm Bath Screen
4. Remove the thermistor from the water bath, dry, and replace into the
permeation tube oven.
5. Make sure the charcoal scrubber is connected to the ZERO bulkhead on
the rear panel.
6. Wait for the permeation gas temperature reading to stabilize.
Use the following procedure to set the gas temperature with an accurate
Resistance
known resistance.
1. Remove the thermistor from POJ1 on the measurement interface board.
1. Connect a 4.369 KΩ resistor across pins 1 and 2 of POJ1 (use a
resistance substitution box and an accurate meter, if necessary).
2. From the Permeation Oven menu, select Cal Gas Thermistor, then
select known resistor
12:34
45.80
SET TO:
45.00
MOVE CURSOR
CHANGE VALUE
AVG
DIAGS ALARM
(Figure
(Figure
9-2).
ALARMx
o
C
o
C
SAVE
9-3).
Model 146i Instruction Manual
Optional Equipment
Permeation Oven
9-7
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Troubleshooting
