Teledyne 201A manual Zero, Entr, Exit, Cal-Conc-Tnx

Teledyne API Model 201A NH3 Analyzer Instruction Manual, 04689, Rev. B1

Table 2.1 - Zero Calibration Procedure - Zero Gas Through the Sample Port

Step No.	Action	Comment
1.	Press	The M201A enters the calibrate mode from
	CAL	sample mode. Input zero gas through the
		sample port.
2.	Wait 20	Wait for reading to stabilize at zero value.
	min
3.	Press	If you change your mind after pressing ZERO,
	ZERO	you can still press EXIT here without zeroing
		the instrument.
4.	Press	Pressing ENTR actually changes the
	ENTR	calculation equations.
5.	Press	M201A returns to sampling. Immediately after
	EXIT	calibration, data is not added to the DAS
		averages.

Table 2.2 - Enter the Expected Span Gas Concentrations Procedure

Step No.	Action	Comment
1.	Press	This key sequence causes the M201A to
		prompt for the expected TNX concentration.
	CAL-CONC-TNX	Enter the TNX span concentration value by
		pressing the key under each digit until the
		expected value is set. This menu can also be
		entered from CALS or CALZ.
2.	Press ENTR	ENTR stores the expected TNX span value.
3.	Press	Now enter the expected TN span concentration
	CAL-CONC-TN
		as in step one.
4.	Press ENTR	Pressing ENTR stores the TN span value and
		returns the prompt to the CONC menu.
5.	Press EXIT	Returns instrument to SAMPLE mode.

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