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Optional Equipment
Permeation Oven
Determining Permeation
Rate by Weight Loss
9-8
Model 146i Instruction Manual
SAMPLE
12:34
CAL GAS THERM (RESISTOR):
CURRENTLY:
SET TO:
MOVE CURSOR
CHANGE VALUE
RANGE
AVG
Figure 9-3. Cal Gas Therm Resistor Screen
3. Enter the exact value of the attached resistor and press
offset.
4. Remove the resistor and reconnect the gas thermistor.
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 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.
2. Insert the permeation tube carefully. Do not touch with fingers.
3. Turn on the instrument.
4. Wait 48-72 hours for the permeation tube to stabilize.
ALARM
4369 Ohms
04369 Ohms
SAVE
DIAGS ALARM
to save the
Thermo Fisher Scientific
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