Dräger VarioGard 2300, Instructions For Use Manual

Page: 13 / 84

Dräger VarioGard 2300 / 2320 13
Maintenance
6.1 Zero point calibration VarioGard 23x0
Action
Status
display Output
signal
Meaning
Prepare the device for zero-point calibration:
Use USB-PC-adapter
(order no. 83 22 016) to
connect the transmitter
with the PC.
Green on or off
depending on
configuration
Measurement
mode
Launch VarioCal
software.
Adjust calibration gas
concentration and unit
Set the maintenance
mode. Place the magnetic
wand on the marking
»
« for 5 seconds and
then remove it again.
Green flashes Maintenance
mode
Transmitters
switch from
measurement
mode to
maintenance
mode. Current
signal = 3.0 mA
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 23x0.
Expose the transmitter to
nitrogen or synthetic air
with a min. flow of
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 Maintenance
mode
Measurement value
within the calibration
range.
Stability of
measurement value
2 times greater than
calibration limit.
Yellow
flashes
quickly
Maintenance
mode
Measurement value
within the calibration
range.
Stability of
measurement value
1 times greater than
calibration limit.
Yellow on
Maintenance
mode
Measurement value
within the calibration
range.
Stability of
measurement 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 Maintenance
mode
Being adjusted.
Stop the zero gas.
Remove the calibration
adaptor VarioGard 23x0. 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 magnetic wand. Place the magnetic
wand on the marking »
« for 5 seconds and then
remove it again.