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Instrument Maintenance
8.3.5. MAINTAINING THE H
8.3.5.1. Predicting When the Converter Catalyst Should Be Replaced.
8.3.5.2. Checking the Efficiency of the H
206
The catalyst contained in the H
periodically in order for the analyzer to continue measuring H2S accurately and
reliability.
This material is capable of efficiently converting H
ppm/hours. This means that if the H
ppb, the scrubber will function for approximately 10 000 hours, a little over 13 months.
If, however, the typical ambient H
would only last for approximately 6000 hours or about 8 months.
To determine how long the H
1. Measure the amount of H
2. Divide 6000 by the H
EXAMPLE: If the H
Operational hours= 6000 ppm/hr ÷ 0.75 ppm
Operational hours= 6,000,000 ppb/hr ÷ 750 ppb
Operational hours= 8000 hrs
To check to see if your H
1. Set the analyzer to SO
2. Supply a gas with a known concentration of SO
of the analyzer.
3. Wait until the analyzer's SO
can be determined by setting the analyzer's display to show the SO2
STB test function (see Section 4.2.1) SO2 STB should be 0.5 ppb or
less before proceeding.
4. Record the stable SO
5. Set the analyzer to H
6. Supply a gas with a known concentration of H
gas used in steps 2-4 above, to the sample gas inlet of the analyzer.
7. Wait until the analyzer's SO
can be determined by setting the analyzer's display to show the H2S
STB test function (see Section 4.2.1) H2S STB should be 0.5 ppb or
less before proceeding.
8. Record the stable H
9. Divide the H
S concentration by the SO
2
EXAMPLE: If the SO
500 ppb:
Measured SO
concentration
2
Measured H
S concentration
2
S SO
CONVERTER
2
2
S SO
converter of your T101 must be replaced
2
2
S content of the sample gas is typically around 600
2
S level of the sample gas is 1000 ppb, the scrubber
2
S SO
converter will operate efficiently:
2
2
S in the sample gas.
2
S concentration.
2
S concentration is 750 ppb:
2
S SO
2
S SO
converter is operating properly:
2
2
measurement mode (see Section 4.5.1).
2
concentration measurement stabilizes. This
2
concentration
2
S measurement mode (see Section 4.5.1).
2
concentration measurement stabilizes. This
2
S concentration
2
and H
S concentration of the two test gases used is
2
2
=
=
Teledyne ML - T101 Operation Manual
S into SO
for up to 6000
2
2
Converter
2
to the sample gas inlet
2
S, equal to that of the SO
2
concentration
2
499.1 ppb
490.3 ppb
2
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