Model T200U-NOy Option Manual Addendum
20 07303C DCN6646
5.1 Calibration or Cal Check Procedure Calibration of the analyzer can be checked or adjusted using gas introduced
through the CAL IN (3) port on the 501Y rear panel. The calibration gas is
routed to a tee fitting (see CAL IN (6) in Figure 4), near the sample inlet on the
external Converter assembly.
Since the zero gas concentration is defined as 0 ppb, it is not necessary to enter
the expected zero value. Table 3 details the zero calibration procedure.
Table 3 Manual Zero Calibration Procedure
Step
Number Action Comment
1. Press CAL The analyzer enters the calibrate mode.
2. Wait For Stability
Type STB < 0.1 PPB
Wait for reading to stabilize at zero value.
3. Press ZERO If you change your mind after pressing ZERO, you can still
press EXIT here without zeroing the instrument.
4. Press ENTR Pressing ENTR actually changes the calculation equations.
5. Press EXIT The analyzer returns to sampling. Immediately after
calibration, data is not added to the DAS averages.
Table 4 Enter Expected Span Gas Concentrations Procedure For NO & NOy
Step Action Comment
1. Press
CAL>CONC>NOy This menu sequence causes the analyzer to prompt for the
expected NOy concentration.
Enter the NOy span concentration value by pressing the
applicable touchscreen buttons to set the expected value.
2. Press ENTR ENTR stores the expected NOy span value.
3. Press
CAL>CONC>NO Now enter the expected NO span concentration as in step one.
4. Press ENTR Pressing ENTR stores the NO span value and returns the
prompt to the CONC menu.
5. Press EXIT Returns instrument to SAMPLE mode.
If desired, compensation for converter efficiency (CE) can be included in the
NOy concentration calculation. Prior to calibration, the converter efficiency
should either be set to 1.0 or determined per the procedure in the T200 manual.