Dräger PIR 7000, Instructions For Use Manual

Page: 22 / 420

22
Calibration of zero for Dräger PIR 7000 / Dräger PIR 7200
Calibrating span for Dräger PIR 7000 / Dräger PIR 7200
Action Status display Output signal Meaning
Prepare the device for zero calibration:
Place the magnetic
wand on the " 0 " mark
and hold it there. Green/yellow flashes
quickly alternately Measurement
mode Lock the device for zero-point
calibration.
Remove magnetic
wand. Green and yellow on Measurement
mode
Device is waiting for calibration
to start.
(Timeout after approx. 5 sec.)
Start zero calibration:
Within 2 seconds
apply the magnetic
wand for min.
1 second to the " 0 "
mark and then
remove it.
Green/yellow flashes
alternately Maintenance
signal Calibration routine has started.
(Timeout after approx. 4 min.)
Position PIR 7000
calibration adapter.
Expose sensor to
nitrogen or synthetic
air at min. 0.5 L/min.
Ensure that the
measuring cuvette is
fully purged with the
selected zero gas
(min. 30 seconds,
adjust for local
conditions).
Place the magnetic
wand on the " 0 " mark
and hold it there.
Green and yellow on Maintenance
signal
Confirm that the gas
transmitter is purged with the
selected zero gas.
Remove magnetic
wand. Green/yellow flashes
slowly alternately Maintenance
signal Device calculates the current
zero error.
(Timeout after approx. 30 min.)
Display of the zero error:
Wait approx. 1 to
2 minutes until the
yellow status light is
off. The zero error
can be read from the
flash rhythm of the
green status light. Green flashes in a
simple sequence: Maintenance
signal The zero error is less than the
defined "calibration range limit".
Green flashes in a
double sequence: Maintenance
signal Minor zero error.
Green flashes in a
triple sequence: Maintenance
signal The zero error is greater than
±3 %LEL.
(Timeout after approx. 30 min.)
Action Status display Output signal Meaning
Adjust the zero:
Place the magnetic
wand on the " 0 " mark
and hold it there. Green and yellow on Maintenance
signal
Adjustment is acknowledged.
Remove magnetic
wand. Green/yellow flashes
alternately Maintenance
signal Zero adjustment is completed.
The gas transmitter terminates the calibration automatically and switches to measurement
mode (green on).

At the end of the calibration or if the timeout is exceeded, shut off zero gas and if necessary
remove the gas exposure accessories used for calibration.
Action Status display Output signal Meaning
Prepare the device for span calibration:
Place the magnetic
wand on the " S "
mark and hold it there. Green/yellow flashes
quickly alternately Measurement
mode Lock the device for span
calibration.
Remove magnetic
wand. Green and yellow on Measurement
mode
Device is waiting for calibration
to start.
(Timeout after approx. 5 sec.)
Start span calibration:
Within 2 seconds
apply the magnetic
wand for min.
1 second to the " S "
mark and then
remove it.
Green/yellow flashes
alternately Maintenance
signal Calibration routine has started.
(Timeout after approx. 4 min.)
Position PIR 7000
calibration adapter.
Expose the sensor
to calibration gas at
min. 0.5 L/min.
Ensure that the
measuring cuvette is
fully purged with the
selected calibration
gas (min. 30 seconds,
adjust for local
conditions).
Place the magnetic
wand on the " S "
mark and hold it there.
Green and yellow on Maintenance
signal
Confirm that the gas
transmitter is purged with the
selected calibration gas.
Remove magnetic
wand. Green/yellow flashes
slowly alternately Maintenance
signal Device calculates the current
display error.
(Timeout after approx. 30 min.)