Vaisala GMP252 - Figure 12 Example of Analog Output Overrange Behavior; Table 31 Asel Command

Syntax Description
Output
voltage (V)
Time
0.00
In error state at
>2200 ppm
(2000 ppm + 10%)
5.00
5.25
Clipped at
2100 ppm
(2000 ppm + 5%)
Regular
measurement
Output clipping limit
Error level
Figure 12 Example of analog output overrange behavior
The example shown above uses output scaled to 0 ... 5 V and 0 ... 2000 ppmCO
2
, has error level set to 0 V,
clipping set to 5 % overrange, and error limit set to 10 % overrange. CO
2
concentrations (ppm) are indicated for
the clipping point and error limit point
Table 31 Asel Command
Syntax Description
asel [channel]<cr>
Show the parameter and scaling of the analog output
in ppm.
channel = Analog output channel
• 1 = voltage output (V)
• 2 = current output (mA)
asel [channel] [parameter lowlimit
highlimit]<cr>
Set the parameter and scaling of the analog output.
channel = Analog output channel
parameter = Parameter that is output on analog
channel. The only parameter available is CO
2
(in ppm).
lowlimit = Lower limit of channel scaling in ppm.
Minimum value is -1000000 ppm (= - 100 %).
highlimit = High limit of channel scaling in ppm.
Maximum value is 1000000 ppm (= 100 %).
GMP252 User Guide M211897EN-D
48