Zero-Point Calibration Dräger Pir 7000 / Dräger Pir 7200 - Dräger PIR 7000 Technical Handbook

Zero-Point Calibration Dräger PIR 7000 / Dräger PIR 7200
Action Status Indicator
Prepare the device for zero-point calibration:
Place the magnetic Green/yellow flash
wand onto the mark alternately and
» 0 «. quickly.
Remove the magne- Green and yellow
tic wand. are on.
Initiate the zero-point calibration:
Place the magnetic
wand within 2
seconds onto the
mark » 0 « for at least
1 second and then
remove it. Green/yellow flash
alternately.
Place on calibration
adapter Dräger
PIR 7000.
Feed nitrogen or syn-
thetic air with at least
0.5 L/min onto the
sensor.
Make sure that the
gas transmitter was
entirely purged with
the chosen zero gas.
Put magnetic wand Green and yellow
onto the mark » 0 «, are on.
then remove again.
Green/yellow flash
alternately and
slowly.
Display of the zero-point deviation:
Green flashes at a
single rhythm.
Green flashes at a
double rhythm.
Green flashes at a
triple rhythm.
Output Signal Meaning
Measuring mode Unlock device for zero-
point calibration.
Measuring mode Device waits for the start
of calibration.
Maintenance The calibration routine is
signal started.
Maintenance Confirmation that the gas
signal transmitter was purged
with the chosen zero gas.
Maintenance The device determines the
signal current zero-point devia-
tion.
Deviation from 0.0 %LEL
or 0.00 % vol. CO
≤1.5 %LEL resp.
Maintenance
≤0.013 % vol. CO
signal
(configurable)
>1.5 %LEL to ≤3 %LEL
Maintenance
signal resp. >0.013 % vol. CO
to ≤0.03 % vol. CO
Maintenance >3 %LEL resp.
signal >0.03 % vol. CO
Maintenance
Timeout
4 minutes
≈30 minutes
:
2
2
2
2
≈30 minutes
2
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