Teledyne 7500ZA - Infrared Gas Analyzer - Manual (Page 57)

NDIR Gas Analyzer Settings and Calibration
Teledyne Analytical Instruments 41
2. Select the Ch you want to change by pressing the UP or DOWN
key, then press the ENT key. The setting content is highlighted.
3. Toggle between “both” or “current” using the UP or DOWN key.
 If “both” is selected, zero or span calibration will be
performed on both Range 1 and Range 2 on the selected Ch
when the calibration is performed.
 If “current” is selected, zero or span calibration will be performed
only for the range displayed when calibration is performed.
4. Press the ENT key after the selection, and the specified
calibration is performed.
To close the Calibration Range Settings screen or to abort the entry
midway, press the ESC key. The previous screen will return.
Example:
Ch1
NOx Range 1: 0 to 200 ppm
Range 2: 0 to 2000 ppm
both
Ch 2
SO
2
Range 1: 0 to 200 ppm
Range 2: 0 to 2000 ppm
current
Ch1: Range 1 and Range 2 are calibrated together
Ch2: Only the currently displayed range is calibrated
Note: When “both” is selected, the same calibration gas
concentration must be used for both ranges.