Self Correction; Output Data - Abb Gla231 Series User Manual

Self Correction

Small drifts in laser wavelength are compensated by adjusting the laser temperature, thus
providing a dynamic response. To deactivate this feature, uncheck the Disable Laser Frequency
Lock box in the Laser Adjust
to return the peaks to their respective targets.

Output Data

The output data collected and processed by the PC104 computer stack provides a DC signal level,
representing the ppm in the
converts this DC voltage signal (ranging from 0 to 5 volts) to a 4–20 mA signal. This DC voltage
signal is also ported to both an external 9 pin D connector, and the Modbus (Optional). The 9-pin D
Analog Out (Figure 15) is configured to provide gas concentration data scaled from 0-5 VDC. The
pin assignments can be seen in Table 15. The scaling can be configured with the User Interface via
screen. (Figure 34)
Analog Outputs
the
Gas Concentration #1 analog +
Gas Concentration #1 analog -
Gas Concentration #2 analog +
Gas Concentration #2 analog -
Gas Concentration #3 analog +
Gas Concentration #3 analog -
Gas Concentration #4 analog +
Gas Concentration #4 analog -
ABB GLA231 Series_Rackmount User Manual_ 3KXG162001R4601_09_2016
.
screen Deactivate this feature if the peaks are outside target window
Numerical display
Table 15 : 9 Pin D Raw Signal Output
Gas Concentration
of the measured gas sample. A signal isolator
9 Pin D Assigned Pins
Pin 1 (+)
Pin 6 (-)
Pin 2 (+)
Pin 7 (-)
Pin 3 (+)
Pin 8 (-)
Pin 4 (+)
Pin 9 (-)
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