Duran Electronica EUROSONDELCO Manual De Instalación página 37

TARGET GAS AND CALIBRATION FLOW
DETECTOR TYPE
CO
H S
2
SO
2
NO
NO
2
HCl
O
2
Cl
2
NH
3
EXP
EURODETECTOR O -Oxygen-: It will be enough to calibrate it in a clean environment adjusting the detector potentiometer
2
called GAIN until obtaining a concentration of 21,0%.
EXP DETECTORS -Explosives-: It will be necessary to use a mixture of Methane at 2.5% v/v balanced in air equivalent to
50% L.E.L. and adjust at this level.
ZEROING -3 modes-
The EURODETECTORS CO that need zeroing will indicate it with the LED lit up when this menu is activated. (Not applicable
to other gases or interface 8 inputs 4-20mA):
LED ON: It needs Zeroing.
LED OFF: It does not need Zeroing.
MODE 1st Looking at the display of the module line.
Check the concentration on the display. If anything other than "000" is displayed slowly adjust the
detector's ZEROING potentiometer until that value is displayed.
MODE 2nd Not looking at the display and without a measuring instrument -only Eurodetector CO-.
With the detectors´ LED lit up, slowly turn the ZEROING potentiometer left to the point where the LED
blinks on and off. Leave it OFF.
MODE 3rd Not looking at the display and with a measuring instrument.
Place the instrument in the 5V scale. Connect the negative to the GND point and the positive to the TP+
point of the detector. Slowly turn the ZEROING potentiometer left or right until obtaining a suitable
millivolts reading (see calibration tables, page nº 36).
For other detectors please consult the information sheet enclosed with the detector.
TARGET GAS (ppm)
200 ppm
20 ppm
20 ppm
20 ppm
10 ppm
20 ppm
Environment or O at 25%
2
20 ppm
20 ppm
2.5% v/v (50% L.E.L.)
MINIMUM FLOW (ml/min)
150
400
450
400
1000
1000
250
1000
500
500
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