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NGA 2000
90003482(2) [NGA-e (MLT-Software 3.2.X)] 07/98
• Change to the line you want with the ↓↓ -key or the ↑↑ -key.
• Select the tag of the reference channel with the 88 -key or the →→ -key:
The display will go back to the menu "Differential Measurement" automatically. You
can see the channel selected in the line "Source channel".
3) Status determination of the reference channel:
• Change to the line "Source concentration" with the ↑↑ -key or the ↓↓ -key and press the
88 -key or the →→ -key to select the parameter. Adjust the parameter with the ↑↑ -key or
the ↓↓ -key and confirm it with the 88 -key.
• Use actual value:
The reference value to calculate the difference concentration will always be the
current value of the reference channel.
• Use stored value:
The reference value to calculate the difference concentration will be fixed during the
whole differential measurement.
4) Give up reference gas to the reference channel:
• You have to give up a defined concentration of the measurement gas to the reference
channel to determine the reference value.
• If the reference signal is stable, you have to change to the line "Store source con-
centration !" with the ↑↑ -key or the ↓↓ -key. Press the 88 -key or the →→ -key to start this
function. If asked, confirm with the F2 key (Yes) or cancel and go back to the menu
page with the F4 key (Back...) or the ←← -key:
The current signal will be fixed for the differential measurement.
5) Give up measurement gas to the measurement channel:
• You have to give up the measurement gas to the measurement channel while the
reference signal is stable to measure the differential concentration.
6) Enable the differential measurement:
• Press the 88 -key or the →→ -key in the line "Function is" and adjust "Enabled" with the
↑ -key or the ↓ -key. Confirm it with the 88 -key:
The differential measurement will start and the differential concentration will be
determined.
Measure Back...
MLT25/CH2/R2
F1 F2 F3 F4 F5
95.00 ppm
-- Channels --
MLT25/CH1
MLT25/CH2
MLT25/CH3
MLT25/CH4
MLT25/CH5
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