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NGA 2000
90003749(1) [NGA-e (Software CLD 2.3/MLT 3.1.X)] 04/98
Main Menu — Expert controls and set up
↓↓
Expert analyzer controls
↓↓
Zero/Span calibration
↓↓
In the menu "Zero/span calibration" you can set up and start the calibration of the analyzer.
The procedure and the menus are the same as described for the analyzer module in
chapter 5.1.1 (p. 5-5).
How to calibrate:
1) Select the measurement range:
• Press the ENTER key or the →→ -key in the line "Measurement range number" to enter
the parameter. Select the range you want to calibrate with the ↑↑ -key or the ↓↓ -key and
confirm it with ENTER. The zero gas concentration and the span gas concentration of
the range selected will appear in the corresponding lines, automatically.
2) Select the gas component:
• Go to the line "NO/NOx toggle!" with the ↓↓ -key and select the gas component you
want with the ENTER key or the →→ -key. The component selected will appear in the
line "Measurement gas", automatically.
3) Zeroing:
• Change to the submenu "Analyzer zero" with the F3 key (ZERO).
• Pay attention to the notes on the screen !
• Flow enough zero gas through the CLD.
• Wait for a stable signal (look at the headline of the display). Then, start the zero gas
calibration with the F3 key (ZERO). The running procedure will be the same as it is
described detailed in chapter 4.2.1 of the basic controls (p. 4-22pp).
• Go back to the menu "Zero/span calibration" with the F2 key or the ←← -key after the
zero gas calibration will be done (Messages on the display: READY/CAL OK).
HOME FACTORS ZERO SPAN INFO
CLD
F1 F2 F3 F4 F5
95.0 ppm
Zero/span calibration
Measurement range number: 3
Span gas concentration: 100.0 ppm
Sample flow: 1100 ml/min
Raw measurement signal: 521590
Measurement gas: NOx
NO/NOx toggle!
Result...
Calibration adjustment limits: Disabled
Zero gas concentration: 0.0 ppm
Status: READY
5.5.2 Expert Analyzer Controls
Zero/Span Calibration