
Manual CWD 2005
Software
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Manual CWD2005.doc
63
Range Cfg.
Code (binary) for measuring status during a range change.
-1
Range not selected or displayed.
1
Wobbe jet set 2 or jet set 1.
2
Combustion air jet on or off.
4
Carrier gas (combustible gas) on or off.
8
Carrier gas (non combustible gas) on or off.
16
Carrier gas (combustible or non combustible gas) on or off.
Number 6: Range with jet combination 1 , combustible carrier gas with an air jet.
Number 2: Jet combination 1 with an air jet.
Calibr.gas:
Number of calibration gases for the total range. The first jet set=1 and
the lower set shows number 2.
Blending:
After a range change, the change is blended to the new value.
No.:
Range switch point 1 or 2
Signal:
Wobbe, Calorific Value or Specific Gravity
Unit:
Engineering units selected.
Value:
Example 1 shows a switch to the second range at 650 + 5% kcal/Nm
3
.
Switch (%: )
Range overlap between ranges in %. Example: 5% hysteresis above.
Change range:
Range switching can be done manually or automatically. If manual
is chosen an additional menu appears, see section 6.2.1.3.9. for more details.
A 2 point calibration
is an additional function for 2 point calibration with 2 calibration
gases. In the screen page 58 in the line change range are 4 different indications
possible
non
automatic
manuel
calculate
„Calculate“ calculates 2 calibration gases in one line. Under „Range No“ third line
“range cfg” enter -1 for suppressing the third range. Now the instrument is prepared
for calibrating with 2 calibration gases. The input line 3 calibr gas is without any
influence.
Now every calibration takes 2 calibration gases automatically. It is necessary to up
date the screen in menu 7.2.1.3.8. with the values of the two calibration gases. After
finishing the new screen inputs, the instrument calibrates always at every time with
the two calibration gases one after another. 2 calibration gases have to be
connected.
Burner time constant:
This is a burner specific factor. Different burner types for
Natural gas, BF gas, LPG gas etc. have there own specific factor.
Max temp inside tube:
Shut down immediately if the thermopile temperature is too
high (50 °C limit).
Calibration constant off:
System offset in running time, application specific only.