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11. APPENDIX A - 631-X FUNCTIONAL TEST MODULE
The Jerome Hydrogen Sulfide Functional Test Module provides a fast and easy method of
verifying that Jerome 631-X Hydrogen Sulfide Analyzers are within specifications.
The Functional Test Module is beneficial:
• In applications where frequent verification of functionality is required, such as ISO 9000
documentation,
• To verify proper instrument operation when unexpected readings are obtained in normal
sampling,
• As part of a weekly maintenance routine, and
• To determine if analyzer calibration is needed.
Simple Operation
The Functional Test Module includes a permeation tube containing hydrogen sulfide. When
activated, the test module releases this H
2
S from the permeation tube at a specific, known
concentration. The H
2
S flows over the gold film sensor of the Jerome analyzer, which then
measures the amount of exposure to the gas. The flow rate and temperature of this release are
factory set to provide a concentration of approximately 250 ppb (0.250 ppm) " 20%. The user
then compares the reading on the Jerome analyzer with the known concentration from the module.
If the H
2
S level shown on the analyzer’s display falls within the expected range (approximately
250 ppb), the instrument is functioning properly. If the level is not in the expected range, it should
be returned to the factory for NIST-traceable calibration.
See page 30 for a list of the components that make up the FTM and its accessory kit.
The FTM, with the exception of the permeation tube, carries a limited one-year warranty to be free
from defects or workmanship. The permeation tube is warranted for 90 days. Refer to the FTM
Operation Manual P/N SS-112 for complete operation and warranty information.
Page 36 of 50 AZI Customer Service 800-528-7411 or 602-470-1414