Setting Temperature With Known Resistance; Determining Permeation Rate By Weight Loss; Figure 9-4. Cal Gas Therm Resistor Screen - Thermo Scientific 43i Instruction Manual

Setting Temperature with
Known Resistance
Determining
Permeation Rate by
Weight Loss
Thermo Fisher Scientific
6. Wait for the permeation gas temperature reading to stabilize.
Use the following procedure to set the gas temperature with an accurate
known resistance.
1. Remove the thermistor from POJ1 on the measurement interface
board.
2. Connect a 4.369 KΩ resistor across pins 1 and 2 of POJ1 (use a
resistance substitution box and an accurate meter, if necessary).
3. From the Permeation Oven menu, select Cal Gas Thermistor, then
select known resistor.
CAL GAS THERM (RESISTOR):
CURRENTLY:
SET TO:
CHANGE VALUE
RANGE
Figure 9–4. Cal Gas Therm Resistor Screen
4. Enter the exact value of the attached resistor and press
the offset.
5. Remove the resistor and reconnect the gas thermistor.
6. Make sure the charcoal scrubber is connected to the ZERO bulkhead
on the rear panel.
7. Wait for the permeation gas temperature reading to stabilize.
Use the following procedure to determine the permeation rate by weight
loss.
1. Make sure the oven has been calibrated as described in the "Permeation
Tube Oven Calibration" procedure described previously.
4369 Ohms
04369 Ohms
MOVE CURSOR
SAVE
AVG DIAGS ALARM
Model 43i Trace Level-Enhanced Instruction Manual
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