Dräger VarioGard, Инструкция по эксплуатации, Страница: 46 / 280

46 Dräger VarioGard
Maintenance
9.1 Zero point calibration VarioGard 3000 EC / VarioGard 3200 CAT / VarioGard 33x0 IR
Action
Status
display Output
signal
Meaning
Prepare the device for zero-point calibration:
Use USB-PC-adapter
(order no. 83 22 016) to
connect Vario Gard centre
with PC.
Green on or off
depending on
configuration
Measurement
mode
Launch VarioCal software.
Select the instruments to
be calibrated (individual
or groups of the same
type or all transmitters).
Set the maintenance
mode.
Green flashes Maintenance
mode
Transmitters switch
from measurement
mode to
maintenance mode.
Insert the instrument for the zero-point calibration:
Place the magnetic wand
on the marking »
«
for 2 seconds and then
remove it again.
Green/yellow
flashes
alternately
Maintenance
mode
Calibration routine
has started.
Measurement value
outside the permitted
calibration range.
Attach the calibration
adapter VarioGard 3x00.
Expose the transmitter to
nitrogen or synthetic air
with min. 0.5 L/min.
Ensure that the sensor is
fully purged with the
selected zero gas.
Action
Status
display Output
signal
Meaning
Stabilise the zero-point signal:
Continue supplying the
selected zero gas.
Yellow flashes
slowly Mainte-
nance mode
Measurement value
within the calibration
range.
Stability of
measurement value
2 times greater than
calibration limit.
Yellow flashes
quickly Mainte-
nance mode
Measurement value
within the calibration
range.
Stability of
measurement value
1 times greater than
calibration limit.
Yellow on
Mainte-
nance mode
Measurement value
within the calibration
range.
Stability of measure-
ment value is OK.
Can be adjusted.
Carry out the zero-point adjustment:
Place the magnetic wand
on the marking »
«
for 2 seconds and then
remove it again.
Green flashes Mainte-
nance mode
Being adjusted.
Stop the zero gas.
Remove the calibration
adaptor VarioGard 3x00. When the action has been completed and if no
subsequent span calibration is needed, the transmitter
must be switched back to measurement mode using
the VarioCal software, or if no actions have been
carried out on the transmitter for 3 hours, it will
automatically switch from maintenance mode to
measurement mode.