Teledyne T201 Manuel D’Utilisation

Teledyne API Model T201 NH

Analyzer Operator Manual

Calibration Procedure

07271B DCN6646

Table 2-4. NO Calibration Procedure - NO Gas through the SPAN Port

Step No.

Action

Comment

1. Press

CALS

The T201 enters the calibrate mode from sample
mode. The NO gas is supplied through the SPAN inlet
port on the rear panel of the M501 NH

Table 2.3

Follow Steps 2 to 5 in Table 2-3.

Notes

 Both the TN

and NO

channels must be spanned individually with nitric

oxide gas. When you span the NO

channel both the NO and NO

concentrations must be manually inputted.

 It is recommended that the calibration of both the TN

and NO

channels be done at the same time.

 Always confirm that SPAN gas is flowing past the sample or span port

on the rear of the M501 NH

converter. There should always be some

excess flow. If insufficient flow is supplied to the analyzer ambient gas
will be entrained and the span values will be incorrect. However, it is
important not to over pressurize the analyzer.

 It is a good idea to allow the analyzer to sample span gas for extended

periods following span calibration. Large drifts can signify leaks or
indicate an issue with the span gas source.

 If after spanning with nitric oxide, the analyzer slopes are out of range

conduct the following:
- Confirm the gas sources are good. Usually the bottle is certified to a
known level of nitric oxide. The bottle should be balanced with nitrogen.
- Try not to use the same regulator for nitric oxide as was used on
ammonia. This also holds for the tubing between the different bottles
and the mixing source (calibrator).
- Confirm the zero reading is good by delivering Zero gas.
- Confirm that the concentration delivered to the analyzer is equal to
what you entered under the CONC menu NOx and TNx.
- Leak check both the M501 NH

and analyzer together.

- Using section 11.6.5 of the T200 manual confirm that the PMT sensor
hardware calibration is set correctly.

2.3 S

PANNING THE

NALYZER WITH

MMONIA