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Thermal Conductivity Analyzer
4mA
20mA
H
H
With a equivalent impurity of less than 3% of range 1. The impurity ratio
must remain constant. When the reference gas supply is replaced, the analyzer
must be re-standardized.
Because of the difficulties involved in obtaining a gas in pure form, the zero
gas must be purchased from a supplier who will certify the cylinder as to its
content. The equivalent impurity concentration of the gas must be less than 3%
of range 1. When the zero gas is introduced for standardization, the range
switch must be in Range 1, and the zero control set such that the recorder
indicates the zero gas impurity.
IMPORTANT: At startup, be sure that the span control dial is set to the
number recorded in Section 7.3.
7.2
Output Signal:
Output coincides with 100% analysis.
=
0 ppm
=
50,000 ppm
=
5000 ppm
=
500 ppm
7.3
Span Setting: 555
7.4
Recommended Accessory Gases.
Purity
Zero Gas
2
Purity
Reference Gas
2
Span Gas
7.4.1 Reference Gas.
7.4.2 Zero Gas.
Teledyne Analytical Instruments
N
in H
2
2
- Range #1
N
in H
2
2
- Range #2
N
in H
2
2
- Range #3
N
in H
2
2
99.999
99.999
350-450 ppm
Model 212R
N
in H
2
2
25
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