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Teledyne 300 Performance Testing, Manual zero/span check, Zero Check, Span Check

Models: 300

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3.0 PERFORMANCE TESTING

3.0 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.

3.1 Manual zero/span check

Operators can manually check the zero and span setpoints 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.

NOTE

ZERO OR SPAN CHECKS CAN BE PERFORMED IN ANY

ORDER.

3.1.1 Zero Check

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

3.1.2 Span Check

Allow the analyzer to sample span gas through the sample port. Press CAL button. After a few minutes the CO reading should be at the expected concentration. If the correct concentration is not reached, then the instrument can be adjusted to read the correct value. To do this, press CONC and enter the expected concentration for calibration. The SPAN button should now be displayed on the front panel. Pressing SPAN and ENTER will modify the internals formulas used to compute the CO reading. If the SPAN button is not displayed, this means that the span 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.

P/N 02163G1 Teledyne API Model 300 CO Analyzer Instruction Manual - Page 31

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Teledyne 300 instruction manual Performance Testing, Manual zero/span check, Zero Check, Span Check
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FAQ

What is zero/span check?

Zero/span check allows operators to manually check the zero and span setpoints of the Analyzer. This is also referred to as a multi-point calibration.

How to perform zero check?

Allow the analyzer to sample zero air through the sample port and press the CAL button. If the CO reading does not go to zero, follow the instructions to modify the internal formulas used to compute the CO reading.

What to do if the span reading is out of adjustment?

If the span reading is too far out of adjustment, the reason for this must be determined before the analyzer can be calibrated. Refer to Section 10.5 for troubleshooting calibration problems.