Teledyne 6200A - Sulfides analyzer - Manual (Page 17)

TAI - Thermal Converter Operator Manual - Page 13
When the span gas reading stabilizes, Z3 is subtracted from the span reading, yielding the actual H2S span
gas value as follows:
[H2S]
Actual
= [H2S]
Apparent
– Z3
Where:
Z3 = Zero gas impurity correction factor
[H2S]
Apparent
= Analyzer response to H2S perm tube + impurities in the zero air.
[H2S]
Actual
= H2S span reading corrected for impurities in zero air.
The [H2S]
Actual
is the reading used to compute the span concentration.
2.6.2 Zero and Span Calibration Procedure
The following is a concise summary of the steps required to zero and span calibrate the 6200A. Please
refer to the standard 6200A manual for a more complete description of the calibration procedure.
Table 2.2 – Zero Calibration Procedure
Step
Number
Action Comment
1.
Press CALZ With sample gas flowing into the sample inlet of the
instrument, press CALZ, which routes sample air into the
charcoal scrubber.
2. Press ZERO ZERO starts Phase 1 of the zero calibration procedure,
allowing zero to be measured with the converter in the
pneumatic pathway. Allow 10 min for stable zero.
3.
Press ENTR
After allowing the instrument to stabilize, press ENTR, to
store the Z1 zero value with the converter in the pathway.
The ZERO key now re-appears, which starts Phase 2
of the zero calibration. Allow 10 min for stable zero.
4. Press ENTR The converter is not in the pathway. Allow the
instrument to stabilize on the new zero value, then press
ENTR to store the Z2 zero value.
5.
Press EXIT
Returns instrument to SAMPLE mode.