Performance Testing; Manual Zero/Span Check; Zero Check - Teledyne 300M Instruction Manual

Carbon monoxide analyzer

Table of Contents

Teledyne API Model 300M CO Analyzer Instruction Manual, 04033, Rev. A

3 PERFORMANCE TESTING

Zero/span checking and calibration of the Teledyne API CO Analyzer is divided into two

sections. Chapter 3 discusses the different methods by which the analyzer's zero and span

settings may be checked and adjusted. The emphasis in Chapter 3 is on the operation of the

buttons and the internal adjustments they make in the instrument.

Zero or span checks can be performed in any order.

Span gas concentration may trigger gas alarms unless the analyzer is

in the calibration mode. Press CAL button prior to introducing

Operators can manually check the zero and span set-points of the analyzer while in sample mode

by allowing the instrument to sample calibration gas and pressing the CAL button. This is also

referred to as a multi-point calibration.

Allow the analyzer to sample zero air through the sample port. Press CAL button. 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. This will force the CO reading to go to zero and modify the internal

formulas used to compute the CO reading. If the ZERO button is not displayed, this means that

the zero reading is too far out of adjustment to do a reliable calibration. The reason for this must

be determined before the analyzer can be calibrated. See Section 10.5 for troubleshooting

calibration problems. Pressing EXIT will bring you back to the sample menu or leave the

instrument in CAL mode if you are also going to make a span check.

NOTE

span gas into the analyzer.

3-1

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