Teledyne 300 IZS zero/span check Option, Dual Range Calibration, Step, Action, Comment

3.1.3 Dual Range Calibration

If the analyzer is being operated in Dual Range mode or Auto-Ranging mode, then the High and Low ranges must be independently calibrated. When the analyzer is in Dual or Auto Range mode you will be prompted to enter the range to calibrate whenever you enter a calibration command from the front panel. Press HIGH or LOW followed by the ENTR button to proceed with the calibration. To calibrate the other range you must exit to the sample menu and restart the calibration. See Section 4.6 for more information on the Range Modes. The following procedure shows an example of how to calibrate the two ranges with calibration gas coming in through the sample port:

Step	Action	Comment
1.	Press CAL	Analyzer enters M-P calibration mode. Calibration gas
		source should be set to deliver zero gas to the sample port.
2.	Press LOW-ENTR	Select range to calibrate
3.	Wait 15 min.	Wait for CO reading to stabilize at zero value.
4.	Press ZERO-ENTR	Changes calibration equations for Low range so analyzer
		will read zero.
5.	Press CONC	Enter span gas concentration for Low range.
6.	Key in span	Enter span gas concentration for Low Range. Set
	concentration	calibration gas source to deliver span concentration
7.	Press ENTR
8.	Wait 15 min.	Wait for CO reading to stabilize at span value
9.	Press SPAN-ENTR	Changes calibration equations for Low range so analyzer
		will read span value.
10.	Press EXIT	Exits back to sample menu

Repeat steps 1-10 for High range.

3.2 IZS zero/span check (Option)

If the IZS (Internal Zero Scrubber) option has been installed and a source of CO span gas has been connected, the operator can check the zero and span setpoints of the analyzer at any time by pressing the CALZ or CALS button.

Pressing CALZ switches the Sample/Cal valve and allows the analyzer to draw air through the zero air scrubber. After a few minutes the CO reading should go to zero. If it doesn't, the operator may press the ZERO button followed by ENTR.

CALS works like CALZ except that externally supplied span gas is drawn through the analyzer. After a few minutes the CO reading should approach the span level (typically 40 PPM). If it doesn't, the operator may press the SPAN button, followed by ENTR. The expected span gas concentration may be changed by pressing the CONC button.

The operator can exit the IZS calibration only by pressing the EXIT button. If either the ZERO or SPAN buttons were pressed and ENTR was not pressed, the Analyzer will beep once to indicate that no changes have been made.

P/N 02163G1 Teledyne API Model 300 CO Analyzer Instruction Manual - Page 32