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Interface settings
10.6 Configuring function key
1. Select Settings > Instrument > Function key and
confirm.
2. Select a function and confirm.
Graph
The measurements of the past 15 minutes
are displayed as a time/concentration
graph.
Faults
Fault messages are displayed in plain text.
Warnings
Warning messages are displayed in plain
text.
Bump test
The bump-test allows applying gas to the
sensor without generating an alarm. The
maintenance signal is transmitted. After 15
minutes or tapping [OK] again ends the
bump test and the instrument returns to nor-
mal operation.
10.7 Resetting to default settings
This function resets the instrument to factory default settings.
1. Select Settings > Instrument > Device init and confirm.
2. Select Confirm and confirm with [OK].
10.8 Deactivating dongles
This function deactivates the sensor self-test dongle to safely
remove the dongle or if the dongle is faulty. Dräger
recommends not to deactivate the dongle.
A dongle can only be reactivated by cycling the power to the
instrument.
1. Select Settings > Instrument > SW dongle and confirm.
2. Select Deactivation func.
The selected dongle is deactivated.
11
Interface settings
HART interface and 4-20mA interface are available for
Polytron 8900 UGLD.
11.1 HART interface
11.1.1 Polling address
The polling address configures the instrument for analog
operation (4 to 20 mA) or multidrop operation. In multidrop
operation the analog interface is deactivated and set to a
constant current of approximately 1 mA. To allow the central
controller to request the Unique Identifier (unique HART
address) with HART command #0, all the devices on a line
must be configured with different polling addresses. It is
advised to choose a sequence starting with 1 and continuous
increments. This function corresponds to HART command #6
(Write Polling Address).
1. Select Settings > Communication >HART interface >
Polling address and confirm.
2. Select the line for editing the address and confirm.
3. Set the polling address and confirm.
20
Address
0
0 - 15
4. Select Confirm and confirm with [OK].
11.1.2 Unique Identifier
This function reads the Unique Identifier (unique HART
address). It has to be known for almost all HART addressing
commands. However, this information is only required for
systems which are not able to read back the Unique Identifier
using the HART command #0 in Short-Frame Format or
HART command #11. The display corresponds to the address
for HART command #0 (Read Unique Identifier) or #11 (Read
Unique Identifier associated with Tag).
1. Select Settings > Communication > HART interface
>Unique Identifier and confirm.
The Unique Identifier is displayed.
11.1.3 Tag
The tag can be used to identify an instrument. It can contain
up to 8 alphanumeric characters. The tag can also be used as
an address for reading the unique identifier using HART
command #11 (Read Unique Identifier Associated with Tag),
even if the polling address is unknown. This requires that a
unique tag has been configured for each instrument.
1. Select Settings > Communication > HART interface >
Tag and confirm.
2. Select the line for editing the tag and confirm.
3. Set the tag and confirm.
4. Select Confirm and confirm with [OK].
11.1.4 Dräger REGARD
This function switches between different HART protocols.
1. Select Settings > Communication > HART interface >
Dräger REGARD and confirm.
2. Select the desired option and confirm.
REGARD SW 2.0
REGARD SW 1.4
11.2 4-20mA interface
The current output of the instrument during normal operation
is between 4 and 20 mA. Between 4.5 and 18 mA the current
changes proportionally to the detected ultrasonic sound
levels. Whereas 4 mA < 54 dB and 20 mA represents about
110 dB.
Alarms are not transmitted via the analog interface. Alarm
thresholds must be set at the control unit.
Instructions for use
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Dräger Polytron
Description
Setting the polling address to
0 activates analog operation
(4 to 20 mA).
Setting the polling address to
0 activates analog operation
(4 to 20 mA).
Default setting
For REGARD controllers with
SW 1.4
®
8900 UGLD Firmware version ≥ 4.0.x
