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TCD Analyzer
4.5.11.2 C
ONCENTRATION
The signal output for concentration is linear over the currently
selected analysis range. For example, if the analyzer is set on range that
was defined as 0–100 %, then the output would be:
Range 0-100%
0
10
20
30
40
50
60
70
80
90
100
4.5.11.3 4-20
MA CALIBRATION
The 4-20 ma outputs for % Range or range ID can be calibrated. A
button named "4-20 mA Calibration" will appear for % range and range
ID outputs.
When the user presses the "4-20 mA Calibration" button and new
screen will appear with the option to calibrate the low limit, 4.00 mA. A
DVM needs to be connected on the output of the analyzer to monitor the
output while adjustment is being through the front screen.
The user can tune the DAC that drives the 4-20 ma output by
pressing the count option on the screen. When the user presses the count
option, the screen changes to the edit screen as follows. Here the user
can enter the value and press ENT. This will tune the DAC with the new
value and can be measured using a multimeter.
Teledyne Analytical Instruments
Voltage Signal
Output (VDC)
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
Operation
Current Signal
Output (mA dc)
4.0
5.6
7.2
8.8
10.4
12.0
13.6
15.2
16.8
18.4
20.0
71
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