Zero Point Calibration Variogard 3000 Ec / Variogard 3200 Cat / Variogard 33X0 Ir - Dräger VarioGard Notice D'utilisation

Maintenance
9.1

Zero point calibration VarioGard 3000 EC / VarioGard 3200 CAT / VarioGard 33x0 IR

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