Delta OHM HD37AB1347, Руководство пользователя

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2. Let the inlet open if you want to perform a calibration at 400 ppm: For this second calibration
procedure,
ensure the instrument is really in clean air.
3. For the calibration at 0 ppm, after connecting the CO
2
input to the small tube from the nitrogen
bottle, adjust the bottle flow meter to get a constant flow from 0.3 to 0.5 l/min.
4. Wait about 15 minutes before continuing.
5. Supply CO
2
for at least 2 minutes so as to stabilize the measurement.
6. Press ENTER on the HD37AB1347 instrument. After few seconds, the new value read by the
probe will appear. Wait the two minutes necessary for calibration without changing the
working conditions.
7. At the end, close the bottle spigot, unscrew the small tube from the instrument and close the
hole using the M6 hexagon slot peg.
4.7.2 CO Calibration – only P37AB147
You can calibrate the zero of the CO sensor in clean air (the CO concentration is lower than 0.1
ppm outdoor) or using nitrogen bottles (code MINICAN.12A).
Use the arrows
▲▼ to select the 2) Calibration CO item:
PROBE CALIBRATION
1) Calibration CO
2
2) Calibration CO
3) Calibration RH
▼▲
select
<ESC> exit/cancel
<ENTER> confirm
Confirm with ENTER. The following screen will appear:
PROBE CALIBRATION
CALIBRATION CO
1) Cal zero
2) Sensitivity set
▼▲
select
<ESC> exit/cancel
<ENTER> confirm