Thermo Scientific 43iQ, Instruction Manual

Page: 151 / 284

Calibration
Equipment Required
Thermo Scientific 43iQ Instruction Manual 4-5
Figure 4–2.
Permeation Tube System
The SO
2
output level is calculated from:
F
K x P
= ]
SO
[
T
OUT
2
Where:
[SO
2
]
OUT
= SO
2
output concentration in ppm
P = permeation rate in µg/min
F
T
= total flow rate of gas after mixing chamber (F
P
+ F
D
) in liters/minute
K (SO
2
) = 0.382 constant for SO
2
permeant
Commercial permeation systems, such as the Thermo Scientific 146iQ
Multigas Calibration System, are available for this requirement. Refer to
the instrument instruction manual for more information.
In addition to the 146iQ and other commercial permeation systems, the
43iQ can also be configured with an optional permeation oven to supply
calibration gas for the instrument. The operation of the internal
permeation oven is described in Chapter 9, “ Optional Equipment ”.
Commercial Permeation
Systems