Environnement
S.A
CO12M
Duplication prohibited
DECEMBER 2011
3–60
This screen is used to program the ranges of each displayed parameter. There are 4 available ranges.
Ranges correspond to the full scale of the analog output, units are those of the parameters displayed
in the « Signal » column:
Range 1: from 0 to 1,
Range 2: from 1 to 10
Range 3: from 10 to 100
Range 4: from 100 to 1000.
Operation principle of ranges:
If range 1 AND 0–1V on the analog output, 1 ppb corresponds to 1 V on the analog output.
If range 2 AND 0–1V on the analog output, 10 ppb correspond to 1 V on the analog output.
If range 3 AND 0–1V on the analog output, 100 ppb correspond to 1 V on the analog output.
If range 4 AND 0–1V on the analog output, 1000 ppb correspond to 1 V on the analog output.
Idem for 1–10 V, 0-20 mA and 4–20 mA.
When signal value is higher than the full scale of the current range, the analyzer switches to the next
higher range. It switches again to the lower range when measurement again passes under 85% of the
full scale of the current range.
Automatic scale adjustment of the output signal depends on the selected range. When the user
operates on several measurement ranges and only one analog range for the output values, he can
obtain an output identical value for different measurement values, as the here-below curve shows it.
1
2
3
4
0
1V
M
EASUREMENT
RANGES
O
UTPUT
SIGNAL
0-1V
0-10 V
0-100 V
0-1000 V
To avoid the ranges commutation, the user can assign the same value to the 4 parameter ranges he
will send to an analog output.
The linearization curve of Ax+B size is used to format the mV signal of the analog output: the A and B
coefficients are used to adjust the calibration curve of the analog output, they are calculated as a
function of the output measured value.
