Teledyne Carbon Monoxide Analyzer 300 User Manual download pdf (Page 37)

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

1 2 ... 32 33 34 35 36 37 38 39 40 41 42 ... 120 121

No comments

Teledyne Carbon Monoxide Analyzer 300 User Manual Page 37