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Computation of
Concentrations
Oven Installation
and Configuration
Thermo Fisher Scientific
7. Tighten the knurled screw finger tight. Do not use tools to tighten.
8. Tighten the white plastic retaining collar.
9. Replace the oven cover being careful to place the tubing and wiring
into the cover slot.
The computation of SO
information. Note that is assumed that all devices are properly calibrated
and that all flows are corrected to 25
Permeation Tube:
Where:
R = permeation rate in ng/min
Q
= flow rate of gas (scc/min) into the charcoal scrubber during span mode
0
K = constant for the specific permeant = 24.45 / MW
MW = molecular weight
K(SO
) = 0.382
2
Use the following procedure to install and configure the permeation oven.
1. Physically install the permeation oven and valves into the instrument
and connect the cables and plumbing.
2. From the Perm Oven Settings menu in the Service menu, select Perm
Oven Selection, then select 45
3. Remove the thermistor from POJ1 on the measurement interface
board.
4. Connect a resistance of approximately 3.8 KΩ across pins 1 and 2 of
POJ1.
output level is shown in the following
2
C and 1 atm.
°
(R)
(K)
Output
(ppm)
=
Q
o
C.
°
Model 43i Trace Level-Enhanced Instruction Manual
Optional Equipment
Internal Permeation Span Source
9-3
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Troubleshooting
