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MODEL 2230R, Process Hydrogen Analyzer
Page 20
5. MAINTENANCE
5.1 CLEANING
If the unit is exposed to process streams containing debris, condensates or other material that
may collect over the sensor tip then the unit should be removed from the stream periodically
and the tip cleaned by a gentle wiping with a clean lint-free cloth or paper.
5.2 CALIBRATION INTERVAL
TELEDYNE ANALYTICAL INSTRUMENTS recommends that the system calibration be carried out if
the unit fails Verification. Field Verification can occur as often as needed and is recommended
when the tolerated sensor drift may result in unacceptably high errors. Anticipated drift rates
and error calculations are explained in the Verification section of this manual. The user has two
choices in calibrating the unit:
Factory
Calibration
Contact TELEDYNE ANALYTICAL INSTRUMENTS to make arrangements
for a comprehensive Factory Calibration using high accuracy gases by
TELEDYNE ANALYTICAL INSTRUMENTS’s factory trained technicians;
optional NIST traceable certificate available upon request. An annual
Factory Calibration is advisable to optimize performance.
Field
Calibration
Refer to Sections 4.4 and 4.5 for the operational procedure. Customer-
specific Field Calibration Kits for the Model 2230R analyzer is available
from TELEDYNE ANALYTICAL INSTRUMENTS. Field Calibration is a 3 stage
process:
1. Run Field Verification,
2. Run Field Calibration,
3. Repeat the Field Verification to confirm a successful Field Calibration.
In the event the Field Calibration procedure seems to not be effective, TELEDYNE ANALYTICAL
INSTRUMENTS recommends the unit be shipped back to the factory for a comprehensive
evaluation and Factory Calibration.
5.3 FIELD VERIFICATION & FIELD CALIBRATION GASES
Field Verification and Field Calibration require the availability of at least two certified known
gases at values specific to the user’s application. For optimization, the hydrogen concentrations
of the gases implemented in Field Verification and Field Calibration must be the same. Flow
rate recommended is 0.5 ± 0.2 slpm.
Verification / Calibration in an Inert (i.e. nitrogen) Background Gas:
For a unit calibrated in an inert gas (i.e. nitrogen) background, carry out Verification and
Calibration in an inert (i.e. nitrogen) gas background.
Gas Connection
Gases are applied to the unit through user’s piping.