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90003749(1) [NGA-e (Software CLD 2.3/MLT 3.1.X)] 04/98
NGA 2000
5 - 5
Span gas calibration notes:
♦ The span gas setpoint of NO and NO
x
have to be the same value, because both
components will be calibrated simultaneously!
♦ You can calibrate all ranges together or each range separately with span gas. You have
to set up the parameter you want in the menu "Calibration Parameters" (see chapter 5.1.2
p. 5-9).
♦ If it will not be possible to calibrate all ranges with the same span gas, you have to
calibrate each range separately!
♦ The desired value of span gas has to be (!) a value between 10% and 110% of each end
of range. Otherwise, no calibration will be running:
• Example:
End of range 1: 50 ppm → Potential span gas setpoints: 5 – 55 ppm
End of range 2: 250 ppm → Potential span gas setpoints: 25 – 275 ppm
End of range 3: 1000 ppm → Potential span gas setpoints: 100 – 1100 ppm
End of range 4: 2500 ppm → Potential span gas setpoints: 250 – 2750 ppm
How to calibrate:
Change to the menu "Zero/span calibration" via the menu line "Calibration...":
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.
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