Teledyne 300 instruction manual Setup Mode, Setup mode operation

4.0 SETUP MODE

This section describes the setup variables which are used to configure the Analyzer.

4.1 Setup mode operation

ALL the setup variables are stored in the Analyzer's EEPROM and are retained during power off and even when new software revisions are installed.

NOTE

IF A VARIABLE IS MODIFIED, BUT ENTR IS NOT

PRESSED, THE VARIABLE WILL NOT BE CHANGED AND

THE ANALYZER WILL BEEP WHEN EXIT IS PRESSED.

4.2Examining the carbon monoxide formula slope and offset

The slope and offset parameters can be examined by pressing the <TST or TST> buttons until the slope and offset test functions appear. The slope and offset parameters are set only during zero and span calibration routines. These parameters are used to adjust the span and zero values to their exact values.

The current value of the carbon monoxide reading that is displayed on the front panel and output on the D/A terminals on the back panel is computed as follows:

1.Every 160 msec, the analyzer takes a CO MEAS reading (i.e. a reading of the detector output with the IR beam passing through the N2 cell of the Gas Filter Wheel) and a CO REF reading (i.e. a reading of the detector output with the IR beam passing through the CO Cell of the Filter Wheel).

2.A raw (uncorrected, un-linearized) CO concentration value is calculated according to the following equation:

CONCENTRATION = GAIN_CONST x (1-CO_MEAS/CO_REF + ZERO_CONST)

P/N 02163G1 Teledyne API Model 300 CO Analyzer Instruction Manual - Page 39