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12.1.7 Setting the warnings of the Dräger
SensorAlive
This menu can be used to set various parameters of the
warning current:
● To set the warning current, select Settings >
Communication > Analog interface > DSA warn
current and enter the value.
● To set the threshold value for the warning, select Settings
> Communication > Analog interface > DSA warn limit
and enter the value.
● To enable or disable the warning, select Settings >
Communication > Analog interface > Set DSA warning
and confirm.
Select Enable or Disable and confirm.
12.1.8 Setting maintenance signal
1. Select Settings > Communication > Analog interface >
Maint. signal and confirm.
2. Set the signal type and confirm.
static
A constant current that can be configured.
dynamic
A square wave signal with the following
characteristics:
[mA]
5
3
12.1.9 Setting the maintenance current
The maintenance current can only be set if the maintenance
signal has been set to static.
1. Select Settings > Communication > Analog interface
>Maint. current and confirm.
2. Set the current and confirm.
12.1.10 Setting analog offset
This function adds an offset to the analog output at 4 mA. The
offset adjusts the current at 4 mA without affecting the 20 mA
set point.
1. Select Settings > Communication > Analog interface
>Analog offset and confirm.
2. Select the line for editing the offset (range: -0.5 to 0.5 mA,
SIL: -0.1 to 0.1) and confirm.
3. Set the current and confirm.
The setting for the Analog offset is displayed.
4. Select Confirm and confirm with [OK].
Instructions for use
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Dräger Polytron
0,7
t
[s]
1,1
®
8000 Series
12.1.11 Setting analog span
This function adjusts the analog output at 20 mA without
affecting the 4 mA set point.
1. Select Settings > Communication > Analog interface >
Analog span and confirm.
2. Select the line for editing the offset (range: -0.5 to 0.5 mA,
SIL: -0.1 to 0.1) and confirm.
3. Set the current and confirm.
The setting for the Analog span is displayed.
4. Select Confirm and confirm with [OK].
12.1.12 Testing the analog interface
These functions change the current of the analog interface for
test purposes (e.g., to check the programming of the
controller). It may be necessary to temporarily inhibit the
alarms at the controller to avoid false alarms. After exiting
these functions, the currents automatically return to the
maintenance signal. During the test, the maintenance symbol
is displayed.
● To set the current or concentration:
1. Select the desired option via Settings > Communication
> Analog interface.
Set Current
Set concentr.
2. Once the alarms at the controller are inhibited, confirm the
message Inhibit all alarms with Next.
3. Select the line for editing and confirm with [OK].
4. Set the desired value.
5. Select and confirm Next.
6. Select the desired option:
Set concentr. out /
set current out
concentration off /
current off
7. Select and confirm Next.
The function is aborted.
8. Once the alarms at the controller are enabled again,
confirm the following message: Enable all alarms.
Interface settings
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This function sets the current
to any value between 0 and
22 mA. Offset current and
analog span are not used in
this function.
This function sets the current
to any measured value
between 0 ppm and full scale
deflection.
This function simulates the
preset measured value or
test current value.
During the test, the mainte-
nance symbol
is displayed.
This function aborts the
transmission of the preset
test value.
en
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