Dräger Polytron 8900 UGLD User manual

Dräger Polytron® 8900 UGLD
Firmware version ≥ 4.0.x
Instructions for use
enUS · de · fr · es · ptBR
WARNING
To properly use this product, read and comply with
these instructions for use.

enUS Instructions for use........................................... 5
de Gebrauchsanweisung .................................... 26
fr Notice d'utilisation .......................................... 49
es Instrucciones de uso ...................................... 72
ptBR Instruções de uso........................................... 96
Dräger Polytron® 8900 UGLD

5
1
4
3
2
6
3
4
5
2
1
A B
C

With relay
E
PWR+
PWR-
PWR-
4-20 mA
PE
PWR+
PWR-
PWR-
4-20 mA
PE
E1
F1
F2
F3
PWR+
PWR-
PWR-
4-20 mA
PE
VDC
+
-
mA
4-20 mA / HART (Current source)
PWR+
PWR-
PWR-
4-20 mA
PE
Stand-alone, relay only
VDC
+
-
4-20 mA / HART (Current sink)
PWR+
PWR-
PWR-
4-20 mA
PE
VDC
+
-
4-20 mA / HART (separate power supply)
mA
PWR+
PWR-
PWR-
4-20 mA
PE
VDC
+
-
mA
F1
F2
F3
G
E1
Cable specifications
Power supply and signals: 24 - 12 AWG / 0.2 - 2.5 mm²
Relays: 20 - 12 AWG / 0.5 - 2.5 mm²
Se r ia l N o : XXXX-XXXX
II 2G
II 2D
0158
XTR 0XXX
9N54
Gas Detector for Use in Hazardous Locations as to
Fire, Electrical Shock and Explosion Hazards only
Class I, Div 1, Groups A,B,C,D
Class I, Zone 1, Group IIC
Polytron Xxx0
Part No: XXXXXXX
Type 4X
UL only: Class II, Div 1, Groups E,F,G
T-Code T6/T4
Supply: 10 ...30V , 0.08 ...0.15mA
Ex db IIC T6/T4 Gb
WARNING: Do not open when energized-
risk of Ignition of Harzadous Atmospheres.
AVERTISSEMENT: Lire attentivement le
manuel avant utilisation.
Dräger Safety 23560 Lübeck, Germany
Ex tb IIIC T80/130°C Db
-40°C Ta +40/+80°C
PTB 11 ATEX 1005X
IECEx PTB 11.0005X
IP6X P :
BVS 15 ATEX G 001X
UL only: -40°C Ta +70°C
WARNING: To reduce the risk of Ignition
of Hazardous Atmospheres, the conduit
must be sealed within 18” of the enclosure.
WARNING: Read Manual before operating.
Data
Matrix
Code
C22.2 No. 152
Relays: 5A, 30V or 230V
~
10
SA
when
SAMPLE
I
ons as
on Hazards only
D
C
UL only: Class
T-Code T6/T4
0.08 ...0.15mA
M
L
0/130°C Db
+40/+80°C
P
M

Contents | en
Instructions for use | Dräger Polytron®8900 UGLD Firmware version ≥ 4.0.x 5
Dräger Polytron® 8900 UGLD
Contents
1Safety-related information................................ 7
1.1 Safety statements ................................................ 7
1.2 Operating area and conditions............................. 7
1.3 Mechanical installation......................................... 7
1.4 Electrical installation ............................................ 7
1.5 Commissioning .................................................... 8
1.6 During operation .................................................. 8
1.6.1 Maintenance ........................................................ 8
2Conventions in this document......................... 8
2.1 Meaning of the warnings...................................... 8
2.2 Typographical conventions .................................. 8
2.3 Trademarks.......................................................... 8
3Description ........................................................ 8
3.1 Product overview ................................................. 8
3.2 Feature description .............................................. 9
3.3 Intended use ........................................................ 9
3.4 Ultrasonic gas leak detection (UGLD).................. 9
3.4.1 Gas leaks ............................................................. 9
3.4.2 Background noise ................................................ 9
3.4.3 Alarm settings ...................................................... 9
3.4.4 Placement / detection coverage........................... 10
3.4.5 Mapping survey.................................................... 11
3.5 Interfaces ............................................................. 11
3.6 Approvals ............................................................. 11
3.6.1 ATEX.................................................................... 11
3.6.2 Marking ................................................................ 11
4Installation ......................................................... 12
4.1 Mechanical installation......................................... 12
4.2 Electrical installation ............................................ 12
4.2.1 Wiring tables ........................................................ 12
4.2.2 Figures on the fold-out page ................................ 12
4.2.3 Preparing the electrical installation ...................... 12
4.2.4 Connecting the 4-20mA/HART® interface............ 12
4.2.5 Grounding ............................................................ 12
4.2.6 Closing the instrument ......................................... 12
5Commissioning ................................................. 13
5.1 Commissioning the instrument............................. 13
5.2 Commissioning service ........................................ 13
6Operation ........................................................... 13
6.1 Display ................................................................. 13
6.1.1 Measuring mode .................................................. 13
6.1.2 Special states....................................................... 13
6.1.3 Ending special states ........................................... 13
6.2 LED and symbol indications................................. 13
6.3 Definitions of indicators in the display.................. 13
6.4 User interface keys .............................................. 14
6.5 Info mode and function key.................................. 14
6.5.1 Activating info mode............................................. 14
6.5.2 Navigating in Info mode ....................................... 14
6.5.3 Using function key................................................ 14
6.6 Menu .................................................................... 14
6.6.1 Menu navigation................................................... 14
6.6.2 Passwords........................................................... 14
6.6.3 Entering the menu............................................... 14
6.6.4 Displaying Information......................................... 14
7Calibration .......................................................... 15
7.1 Test gas .............................................................. 15
7.2 Performing a bump test....................................... 15
7.3 Preparing a calibration ........................................ 15
7.4 Performing a zero calibration .............................. 15
7.5 Performing a span calibration ............................. 16
8Troubleshooting ................................................ 16
8.1 Faults .................................................................. 16
8.2 Warnings ............................................................. 17
9Maintenance ....................................................... 18
9.1 Sensor replacement ............................................ 18
10 Instrument settings ........................................... 18
10.1 Alarms and delay ................................................ 18
10.1.1 Changing unit ...................................................... 18
10.1.2 Switching the alarms on or off............................. 18
10.1.3 Configuring alarms .............................................. 18
10.1.4 Adjusting alarm delay time and analyzed time.... 19
10.1.5 Activating delay function ..................................... 19
10.1.6 Setting analog output signal (4-20 mA)
characteristic ....................................................... 19
10.2 Testing alarms/relays .......................................... 19
10.3 Setting passwords............................................... 19
10.4 Setting date and time .......................................... 19
10.5 Setting language ................................................. 19
10.6 Configuring function key...................................... 20
10.7 Resetting to default settings................................ 20
10.8 Deactivating dongles........................................... 20
11 Interface settings ............................................... 20
11.1 HART interface.................................................... 20
11.1.1 Polling address.................................................... 20
11.1.2 Unique Identifier .................................................. 20
11.1.3 Tag ...................................................................... 20
11.1.4 Dräger REGARD................................................. 20
11.2 4-20mA interface................................................. 20
11.2.1 Full scale deflection............................................. 21
11.2.2 Settings at the control unit................................... 21
11.2.3 Setting fault current ............................................. 21
11.2.4 Information regarding the warning signal ............ 21
11.2.5 Switching the warning signal on or off................. 21
11.2.6 Setting warning interval....................................... 21
11.2.7 Setting warning current ....................................... 21
11.2.8 Setting maintenance signal................................. 21
11.2.9 Setting static maintenance current...................... 21
11.2.10 Setting analog offset ........................................... 21
11.2.11 Setting analog span ............................................ 21
11.2.12 Testing the analog interface................................ 21
12 Sensor settings.................................................. 22
12.1 Setting capture range.......................................... 22

6 Instructions for use | Dräger Polytron®8900 UGLD Firmware version ≥ 4.0.x
en | Contents
12.2 Resetting sensor.................................................. 22
12.3 Setting calibration interval ................................... 22
12.4 Setting sensor lock .............................................. 22
12.5 Sensor test .......................................................... 22
12.6 Gas settings......................................................... 23
13 Factory default settings .................................... 23
13.1 Fixed settings for relays, LED and alarm............. 23
13.2 Settings which can be changed via the menu ..... 23
13.3 Sensor specific values......................................... 23
14 Disposal.............................................................. 24
15 Technical data.................................................... 24
15.1 Signal transmission to control unit....................... 24
15.2 Cable specifications............................................. 24
15.3 Power supply ....................................................... 24
15.4 General specifications ......................................... 24
15.5 Environmental parameters .................................. 25
15.6 Tightening torque................................................. 25
16 Accessories and spare parts............................ 25

Safety-related information | en
Instructions for use | Dräger Polytron®8900 UGLD Firmware version ≥ 4.0.x 7
1 Safety-related information
These instructions for use are available in further
languages and can be downloaded in electronic form via the
database for technical documentation (www.draeger.com/ifu)
or a printed version can be ordered free of charge via Dräger.
1.1 Safety statements
– Before using this product, carefully read these Instructions
for Use and those of the associated products.
– Strictly follow the instruction for use. The user must fully
understand and strictly observe the instructions. Use the
product only for the purposes and under the conditions
specified in this document.
– Comply with all local and national laws, rules, and
regulations associated with this product.
– Only trained and competent personnel are permitted to
inspect, repair and service the product as detailed in these
instructions for use. Further maintenance work that is not
detailed in these instructions for use must only be carried
out by Dräger or personnel qualified by Dräger.
– Dräger recommends a Dräger service contract for all
maintenance activities and that all repairs are carried out
by Dräger.
– Use only genuine Dräger spare parts and accessories.
Otherwise the proper functioning of the product may be
impaired.
– Do not dispose of the Instructions for Use. Ensure that
they are retained and appropriately used by the product
user.
– Only trained and competent users are permitted to use
this product.
– Maintenance must be performed as described, see
9 Maintenance.
– Only operate the product within the framework of a risk-
based alarm signaling concept.
– Before connecting this instrument to electrical devices not
mentioned in the IFU consult Dräger
– Notify Dräger in the event of any component fault or
failure.
– The instruments or components may not be modified in
any manner.
– The use of faulty or incomplete parts is forbidden.
– The appropriate regulations must be observed at all times
when carrying out repairs on these instruments or
components.
–WARNING: Risk of ignition of flammable or explosive
atmospheres! Substitution of components may impair
Intrinsic Safety.
– The flameproof / explosion proof joints are not in
accordance with the relevant minimum or maximum
values of EN/IEC 60079-1. The joints are not intended to
be re-worked by the user.
1.2 Operating area and conditions
– For SIL applications observe the Polytron® 8xx0 Safety
Manual.
– Observe the specifications and restrictions in the
Instructions for Use and/ or data sheets for the sensors.
–CAUTION Risk of ignition of flammable or explosive
atmospheres! Not tested in oxygen enriched atmospheres
(>21% O2).
–Using the product in areas subject to explosion
hazards: Instruments or components for use in explosion-
hazard areas which have been tested and approved
according to national, European or international Explosion
Protection Regulations may only be used under the
conditions specified in the approval and with consideration
of the relevant legal regulations.
–Hazardous areas classified by divisions: The device is
intended to be used in hazardous areas Class I, Div. 1 or
Div. 2, where gases of groups A, B, C, D and temperature
class T4 may be present. The device must not be
operated within ambient temperatures outside the
temperature range marked on the device.
–Hazardous areas classified by zones:
The device is intended to be used in hazardous areas
classified Zone 1 or Zone 2 where gases of explosion
groups IIA, IIB or IIC and temperature class T4 may be
present. The device must not be operated within ambient
temperatures outside the temperature range marked on
the device.
1.3 Mechanical installation
– Strict compliance must be given to the local, state, national
codes and regulations that govern the installation of gas
monitoring equipment.
– The future use of accessories and maintenance
equipment must be kept in mind.
– The instrument must not be exposed to radiant heat that
will cause the temperature to rise beyond the limits stated
in 15.5 Environmental parameters. The use of a reflecting
shield is recommended.
– The instrument may be equipped with a dust plug at the
conduit entry. This plug is not explosion proof nor meant to
be watertight, and must be removed before connecting the
instrument to a sealed conduit or installation of a
flameproof cable gland.
– Unused openings must be closed with a plug. For correct
tightening torques of conduit hubs, cable glands, plugs
and sensor see 15.6 Tightening torque.
– For non-conduit installations, an approved cable gland
must be used (e.g. Hawke A501/421/A/¾” NPT or
equivalent)
–WARNING: Only for conduit installations: To reduce the
risk of Ignition of Hazardous Atmospheres, the conduit
must be sealed within 45 cm (18") of the enclosure.
1.4 Electrical installation
– Strict compliance must be given to the electrical codes
that govern the routing and connection of electrical power
and signal cables to gas monitoring equipment.
– The instrument must have between 10 to 30 VDC at the
instrument.
– Ferrules must be used.

8 Instructions for use | Dräger Polytron®8900 UGLD Firmware version ≥ 4.0.x
en | Conventions in this document
– The conductors for the power supply must have an
adequately low resistance to ensure the correct supply
voltage at the instrument.
– Wire insulation must be stripped by 5 to 7mm.
– Secondary circuit intended to be supplied from an isolating
source (N/A for relay circuits).
– When installed at locations exceeding ambient
temperatures of 55 °C, use only appropriate wiring,
specified for at least 25 °C above the maximum ambient
temperature.
Analog interface
– To ensure proper operation of the instrument, the
impedance of the 4 to 20 mA signal loop must not exceed
300 Ohms. With values above 300 Ohms, monitoring of
the supply voltage cannot be guaranteed. Depending on
the operating voltage and according to the application (e.
g. HART® operation), certain minimum impedances must
be observed (see "Signal transmission to control unit",
page 24).
1.5 Commissioning
– Ensure wiring for relays and connections for sensor are
made before applying power.
– Before leaving the instrument for normal operation, check
the configuration and calibration for the proper settings.
1.6 During operation
– After modifying parameters with the PolySoft PC software
or another software, verify all parameters by downloading
from the instrument or by checking them on the Polytron
8xx0.
– IP ratings do not imply that the equipment detects leaks
during and after exposure to those conditions. In case of
dust deposits and submersion/jet water, check the
calibration and the proper functioning of the device.
Risk of ignition of flammable or explosive atmospheres!
–CAUTION: High off scale readings may indicate an
explosive concentration.
(Only for instruments measuring combustible
atmospheres.)
–WARNING: Do not open when energized
1.6.1 Maintenance
– The maintenance intervals must be established for each
individual installation. Depending on safety considerations
and application specific conditions the instrument is used
in, these might need to be shortened.
– Refer to the maintenance section in the transmitter
instructions for use.
2 Conventions in this document
2.1 Meaning of the warnings
The following warnings are used in this document to alert the
user to potential dangers. A definition of the meaning of each
warning is as follows:
2.2 Typographical conventions
2.3 Trademarks
The following webpage lists the countries in which Dräger's
trademarks are registered: www.draeger.com/trademarks.
3 Description
3.1 Product overview
Refer to the figures on the fold-out page
Alert icon Signal word Warning classification
WARNING Indicates a potentially hazard-
ous situation. If not avoided, it
could result in death or serious
injury.
CAUTION Indicates a potentially hazard-
ous situation. If not avoided, it
could result in physical injury. It
may also be used to alert
against unsafe practices.
NOTICE Indicates a potentially hazard-
ous situation. If not avoided, it
could result in damage to the
product or environment.
Text Texts in bold type identifies labels on the device
and screen texts.
► This triangle indicates the possibilities for avoiding
the hazard in warnings.
> The greater-than sign indicates a navigation path
in a menu.
This symbol indicates information that facilitates
the use of the product.
Trademark Trademark owner
Polytron®Dräger
DrägerSensor®Dräger
HART®HART Communication Foundation
A 1 Enclosure lid
A 2 Set screw (2 mm Allen screw)
A 3 Handle
A 4 PCB unit
A 5 Enclosure bottom
A 6 Port for sensor
B Sensor replacement
C Calibration set-up

Description | en
Instructions for use | Dräger Polytron®8900 UGLD Firmware version ≥ 4.0.x 9
3.2 Feature description
Polytron 8000 instruments are housed in a rugged stainless
steel enclosure for indoor and outdoor applications.
The flameproof / explosion proof enclosure provides three ¾"
NPT openings, which can be used for field wiring or direct
attachment of a sensor.
Polytron 8900 UGLD consists of an ultrasonic sensor (remote
or integrated) and the transmitter. The ultrasonic sensor
detects the ultrasonic sound level of the surrounding areas.
The detected ultrasound is then indicated as dB (re 20 µPa)
or percentage of full scale measuring range on the display
and the analog interface.
Level of ultrasound, status messages, and menu choices are
displayed on a backlit graphic LC-display and 3 colored LEDs.
Navigation through the menu is done by taping a magnetic
wand on the glass at the appropriate indicator. The instrument
can be configured, calibrated and maintained non-intrusively
without declassifying the area.
The instrument can be operated as current source or sink.
With the optional remote sensing head, the ultrasonic sensor
can be mounted at a distance of up to 30 m from the
transmitter.
3.3 Intended use
Polytron 8900 UGLD is an explosion proof instrument for
continuous ultrasonic gas leak detection (Ultrasonic Gas Leak
Detection = UGLD).
Dräger Polytron 8900 UGLD can be used to build large and
complex monitoring systems if sufficient power supply and a
sufficient number of HART/4-20 mA input channels are
available in a suitable Programmable Logic Controller (PLC),
e.g. Dräger REGARD 7000.
The instrument can be connected through a sealed conduit or
approved cable gland to a Dräger monitoring system or a
PLC.
The instrument is designed to be installed in permanent
locations and is approved for use in hazardous, classified
areas.
A mapping survey of the installation site should be conducted
to determine environmental conditions. With the obtained data
the instrument is commissioned.
3.4 Ultrasonic gas leak detection (UGLD)
Pressurized gas leaks (minimum pressure 2 bar / 29 psi)
generate both acoustic and ultrasound. Airborne ultrasound
has a frequency range of approx. 16 kHz to >100 kHz.
Dräger Polytron 8900 UGLD frequency range extends from
16 kHz to >80 kHz.
There are three primary factors that influence the intensity of
the ultrasound signal:
– Physical size of the leak (mass flow)
– Pressure drop between the pressurized vessel or pipeline
and the surrounding atmosphere.
– Properties of leaking gas
Gases with lower molecular mass (or higher speed of
sound) appear louder.
Ultrasound travels at the speed of sound and is only slightly
influenced by wind or strong air currents. Thus, the instrument
detects pressurized gas leaks that point detectors could miss
due to environmental conditions. The position of the gas leak
relative to the instrument does not significantly affect the
ability of the system to detect leaks.
Size and ultrasound distribution of a leak
3.4.1 Gas leaks
Point detectors detect gas concentrations (e.g. ppm, %LEL).
UGLD transmitters indicate a change of sound in a known
environment. This is likely to be the onset of a hazard caused
by a leak.
Ultrasound emitted by gas leaks is proportional to the leak
rate. Leak rate is also called mass flow rate and describes the
amount of gas released over time [kg/s].
3.4.2 Background noise
Background noise is recurrent noise from running machinery
or other sound sources that emit ultrasound.
To increase the range, look for a location with as little
background signal as possible (< 54 dB re 20 µPa).
3.4.3 Alarm settings
The instrument displays the ultrasonic sound level in dB.
Alarm threshold
Alarm threshold should be based on the max. recurrent
background noise level. Short lasting, background noise
peaks may conflict with a lower required alarm threshold. For
such cases, an alarm delay can be set.
Dräger recommends the following alarm thresholds.
– Alarm A1: 6 dB above max. recurrent background noise.
– Alarm A2 can be set as a second escalation stage.
37729
Wind
10 % LEL
50 % LEL
Gas leak
UGLD
100 % LEL

10 Instructions for use | Dräger Polytron®8900 UGLD Firmware version ≥ 4.0.x
en | Description
In the example, A1 is triggered at 66 dB and A2 is triggered at
72 dB.
Alarm delay and analyzed time
If there is a possibility of short background noise peaks, it is
reasonable to install an alarm delay. An alarm delay helps to
avoid false alarms by ignoring spurious sound peaks not
generated by a leak. Ultrasound peaks not created by a leak
can arise e.g. by the fizz of detaching compressed air hoses,
active pressure release valves, the jingling of tools falling to
the ground or similar incidents. These sounds shall not trigger
an alarm even if the detected sound levels breaches the
alarm thresholds for a short time. Real leaks are
characterized by generating a continuous signal. An alarm
shall be triggered only if the signal is breaching the alarm
threshold for a defined alarm delay time (Delay) within a time
frame (Analyzed time) set to be analyzed.
Concept of the parameter ‘Delay’ in the menu
All measurement data points (one per second) within 60
seconds are sorted by value. The parameter Delay (say e.g.
20 seconds) will provide the 20th largest value measured in
this time frame. Here, it does not matter whether the larger
data are received in one sequence or at different moments
within the 60 seconds.
Concept of the parameter ‘Analyzed time’ in the menu
The parameter Analyzed time defines the number of
measurement data points (length in seconds) that are used to
determine the measurement value given by the parameter
Delay. The default value of the analyzed time is 60 seconds.
This parameter can be changed by the DrägerService.
Examples
A If a normal delay is wanted, like: within the delay time the
signal shall not drop below the alarm threshold and after
the delay time the alarm shall be triggered. Here, the
parameters Delay and Analyzed time shall be set to the
same number.
Possible disadvantage: In usual industrial setups the
ultrasonic signal by a leak can vary by e.g. shadowing
effects (passing vehicles, changing environments, moving
pressure vessels, etc.). Once the signal drops below the
alarm threshold, the delay time starts over again. It is
recommended to allow a few data points to drop below
alarm level without losing too much time in detecting the
leak. If a delay of 20 seconds within an analyzed time of
60 seconds is used, the alarm is triggered as soon as 20
measurement data points within 60 seconds are higher
than the alarm threshold. If there is no repeated or
persistent background signal to be expected, it reacts
exactly like a normal delay. This may be a valid setup.
B If there is a recurring background signal (e.g. the UGLD is
located near a large metal punch or release valve with
regular gas deflation events) that extends repeatedly
beyond the alarm level, the delay shall be set to a longer
time, preventing to trigger an unwanted alarm by adding
up background noise events.
Possible disadvantage: the delay may be too long for a
quick detection of a leak and a safe reaction to it. In order
to react to a leak quickly, the parameter Analyzed time
shall not be chosen to be much larger than the delay.
Thus, the alarm is triggered once the moments between
the background signals that are usually below the alarm
threshold are filled by the sound of the leak.
These examples show the concept of the parameters Delay
and Analyzed time. The alarm delay and analyzed time,
which define the time where no alarm is triggered, should be
optimized for each installation. Dräger recommends alarm
delays of 10-30 seconds depending on the duration of
spurious ultrasound events. Alarm delays of up to 60 seconds
can be set by the customer. If longer delays are needed, the
DrägerService can install delays of up to 240 seconds.
3.4.4 Placement / detection coverage
Instruments are normally installed at heights of 3-5 m (approx.
10- 16 ft.) above possible gas leak locations.
The recommendation that the instruments have to be installed
above possible gas leaks may result in installations awkward
to reach for maintenance and configuration.
The optional remote sensing head that can be installed
remotely from the transmitter allows the display to be easily
accessible for configuration. Remote sensor cables are
available in lengths of 5 m, 15 m, and 30 m (approx. 15 ft., 50
ft. and 100 ft). The remote sensing head can also be used to
avoid interferences such as vibrations or precipitation.
37176
Background
noise level
60 dB
A1 at
66 dB
110 dB
50 dB
+ 6 dB
+ 12 dB
A2 at
72 dB
55034
Signal
No of datapoints >A
Alarm 2
time
time
Alarm 1
analyzed
time
Background signals
UGLD signal
delay timing for A1 delay timing for A2
leak
signal
delay
Alarm 1
Alarm 2

Description | en
Instructions for use | Dräger Polytron®8900 UGLD Firmware version ≥ 4.0.x 11
Placement of the ultrasonic sensor should not be obstructed
by solid objects like walls or pipework. Such obstacles might
deflect or absorb the ultrasound on its way to the instrument.
To optimize installation the sensor surface can be pointed at
different directions.
Sensor orientation and coverage
The instrument detects ultrasound within a 360° coverage.
However, coverage is not spherical since the sensor is more
sensitive to the front than off to the side or back. Therefore,
coverage range is affected by the sensor's orientation towards
possible leaks.
Detection range for different leaks sizes of CH4 at different
alarm thresholds.
Limits to sensor orientation
The sensor surface should be facing potential gas leak
sources. In most cases, the orientation of the sensor will be
best facing downwards. In any case, objects (e.g. raindrops)
falling onto the sensor surface generating a signal due to
physical impact should be prevented.
3.4.5 Mapping survey
Mapping surveys should be conducted before an instrument
is installed. A mapping survey is conducted by using a field
survey device to record background ultrasound noise.
Background noise readings serve as the basis for defining
alarm set points. A background noise level must be
determined for each installation location so that an
appropriate alarm threshold can be defined for that location.
A mapping survey can be requested through the
DrägerService organization.
The following environmental conditions need to be
considered, because they can affect the measurement radius
of the sensor.
– Typical temperature and humidity range
UGLD range is higher with cold, dry air and lower with
warm, humid air
– Typical and maximum background noise
A field survey device may be used to log background
noise and suggest suitable delay times.
There are two initial situations for a mapping survey.
– Green field
The site to be mapped does not yet exist. During the
planning stage, possible installation locations are
determined based on estimated background levels.
– Brown field
The site to be secured does already exist and is in
operation. Measurements of typical and maximum
background levels may be performed on site.
3.5 Interfaces
● 4 to 20 mA analog (per NAMUR recommendation NE43)
● Digital HART® output signal
● Relays with alarm delay functionality1)
3.6 Approvals
The approvals and the declaration of conformity can be found
in the document "Notes on Approval" (order no. 4544300).
3.6.1 ATEX
See approval label. There is also a printout of the approval
label inside the shipping box of the instrument.
3.6.2 Marking
The marking is reproduced on a separate piece of paper
shipped with the instrument.
Serial Number key: The third letter of the serial number
specifies the manufacturing year: M = 2019, N = 2020, P =
2021, R = 2022, S = 2023, T = 2024, U = 2025, W = 2026, X =
2027, Y = 2028, Z = 2029, etc. (Letters G, I, O, Q are omitted)
Example: Serial Number ARMB-0001: the third letter is M,
which means that the unit was manufactured in 2019.
3772837143
Gas leak
UGLD
Remote sensing head
2 4 6 8 10 12 14 16 18 20
Distance [m]:
1
2
3
4
5 m above ground
1
2
3
4
100,0 g/s, alarm ≥ 70 dB
50,0 g/s, alarm ≥ 70 dB
25,0 g/s, alarm ≥ 70 dB
12,5 g/s, alarm ≥ 70 dB
or 50,0 g/s, alarm ≥ 70 dB
or 50,0 g/s, alarm ≥ 64 dB
or 50,0 g/s, alarm ≥ 76 dB
or 50,0 g/s, alarm ≥ 82 dB
1) Alarm delay functionality will be available in a future firmware release.

12 Instructions for use | Dräger Polytron®8900 UGLD Firmware version ≥ 4.0.x
en | Installation
4 Installation
Obey the safety statements mentioned in 1 Safety-related
information!
4.1 Mechanical installation
The instrument can be mounted for measuring ultrasound in
ambient air.
1. Use M6 (1/4’’) bolts with hex socket caps to mount the
enclosure to one of the following options.
Mechanical installation impacts
Vibrations might have influence on the ultrasonic sensor
measurements. Machinery and conduits might cause
vibrations in the ultrasonic frequency range.
Conduits protect cable routing and are screwed into the
enclosure. Conduits might transmit high-frequency vibrations
into the transmitter enclosure.
To prevent vibrations, order and use the following spare parts.
● Flexible conduit cable glands
● Remote installation-kit
4.2 Electrical installation
For recommended tightening torques and admissible wire
specifications see 15.2 Cable specifications.
4.2.1 Wiring tables
4-20mA / HART® interface
4.2.2 Figures on the fold-out page
4.2.3 Preparing the electrical installation
1. Loosen set-screw (2) and unscrew lid from instrument
(Figure A on the fold-out page).
2. Pull-out the PCB unit.
3. Proceed with the figure on the fold-out page
corresponding to your Polytron model and signal output.
4.2.4 Connecting the 4-20mA/HART® interface
For connections to a control unit (PLC), refer to the
documentation corresponding to the control unit.
1. Pull off the 5-pin connector.
2. Connect the three wires for power and signal to the
appropriate terminal as indicated in the wiring table and
figure.
3. Plug connector back into socket and tighten screws.
4. Close the instrument, see 4.2.6 Closing the instrument.
4.2.5 Grounding
1. Ground the enclosure of the instrument locally at the
grounding lug.
2. Connect the shield of the wires only to the instrument
earth ground of the controller (e g. chassis, ground
busbar, etc.).
Unless special measures are taken (e. g. capacitive
earthing), the shield must only be connected at one end.
4.2.6 Closing the instrument
1. Ensure the following connections are properly made:
a. Wiring screws are tightened to the correct torque.
b. All cable connectors are secured with screws.
c. The sensor connector is plugged.
d. The grounding cable coming from the enclosure is
connected to the lug on the PCB unit (Figure E on the
fold-out page)
2. Place PCB unit back into the enclosure.
3. Screw the lid back on, until it is seated with correct torque,
and tighten set-screw.
Option
Mounting on a flat surface Drilling template 4544299
Mounting on a pole Pole mount kit (part number
4544198)
Pin Mark Function
1 PWR+ V+
2 PWR- V-
3 PWR- V-
To be used when the instrument is not pow-
ered by the control unit (separate power sup-
ply), see figures F3 and E1 on the fold-out
page.
4 4-
20 mA
4 to 20 mA signal (Operation as source or
sink)
5 PE Protective earth
Optional PE for relay connection. Connecting
PE together with the 4-20 mA analog output
may cause ground loops.
Figure Connecting diagram for instruments
E With relay
F1 4-20 mA / HART (Current source)
F2 4-20 mA / HART (Current sink)
F3 4-20 mA / HART (separate power supply)
Figure Connecting diagram for instruments

Commissioning | en
Instructions for use | Dräger Polytron®8900 UGLD Firmware version ≥ 4.0.x 13
5 Commissioning
5.1 Commissioning the instrument
1. Switch power supply on.
The fault relay is switched.
The instrument will go through a start-up sequence
(LCD / LED test, software version, and initialization)
and start the warm-up period.
The maintenance signal on the 4-20 mA interface
remains pending until the sensor is warmed-up.
The display shows that the sensor will be ready for
measurement in hh:mm:ss (countdown) and the
instrument transmits the maintenance signal.
After the countdown, the instrument goes into normal
operation. The display shows the currently detected
signal, UGLD (ultrasonic gas leak detection) and the
units of measurement. The green LED is lit.
2. Check date and time.
3. Perform bump test.
5.2 Commissioning service
After the system is installed, it is recommended to schedule a
system commissioning service through DrägerService.
A commissioning service ensures that customer required leak
rate at each potential leak location will be detected by the
corresponding instrument. The instrument shall not be
operated permanently with a background signal above
100 dB. However, permanent high signal above 100 dB does
not harm the device.
A commissioning device simulates a real gas leak in a short
burst and is proof for proper installation. A calibration of the
instrument is not necessary.
6 Operation
6.1 Display
6.1.1 Measuring mode
6.1.2 Special states
If the instrument is in a special state, a proper measurement
can no longer be guaranteed.
This is the case:
– When the ultrasonic signal exceeds the measuring range.
– When a fault occurs.
– During calibrations.
– During bump tests.
– During maintenance.
6.1.3 Ending special states
Fault / warning indication
Faults and warnings are non-latching. If the fault or warning
condition clears, the message disappears.
To solve warning and fault conditions, display the error code
or warning message (see "Displaying Information", page 14)
and begin troubleshooting (see "Troubleshooting", page 16).
6.2 LED and symbol indications
6.3 Definitions of indicators in the
display
Display example Description
In normal operation, the detected sig-
nal of the instrument is displayed1).
1) The value changes according to the background noise emitted by
machinery or personnel. Thus a changing value does not immediately
indicate a leak. To prevent misinterpretation from personnel, the dis-
play can be switched off.
UGLD dB
54
Display example Description
Exceeding measuring range
Fault indication
The current output of the analog inter-
face is set to fault current and the fault
relay is asserted (if relay option is
installed).
For calibration, bump test and mainte-
nance the symbol is displayed on
the right side of the display. On the left
side corresponding information is
given.
Symbol LED Description
Red Alarm Triggered
Yellow Fault
Green Power on
Symbol Explanation
Error message available.
Warning message available.
Maintenance signal is transmitted.
Measuring range of analog interface
exceeded.
Measurement value less than range of
analog interface.
HART® operation is active. Analog inter-
face is set to a fixed value and is not trans-
mitting any measurement signal.
UGLD dB
UGLD dB
54

14 Instructions for use | Dräger Polytron®8900 UGLD Firmware version ≥ 4.0.x
en | Operation
6.4 User interface keys
The instrument is designed for the magnetic wand (part
number 4544101: blue body, white logo) to be used with the
enclosure lid in place. If the enclosure lid is not in place, the
magnetic wand may activate two or more buttons at once
(cross-talk).
6.5 Info mode and function key
6.5.1 Activating info mode
The Info mode is used to show instrument relevant
information. This does not interrupt the normal operation of
the instrument.
● Tap and hold for 3 seconds in measuring mode.
6.5.2 Navigating in Info mode
If no key is tapped within 30 seconds, the instrument will
automatically return to normal operation.
6.5.3 Using function key
Using the function key, a pre-set function can be executed. By
default the faults are displayed.
● Tap and hold for 1 seconds in measuring mode.
To configure the function key, see 10.6 Configuring function
key.
6.6 Menu
6.6.1 Menu navigation
6.6.2 Passwords
To change passwords, see 10.3.
6.6.3 Entering the menu
● To directly enter the Information menu:
a. Tap and hold for 1 second in the measuring mode.
● To enter the Calibration menu:
a. Tap and hold for 3 seconds in measuring mode
b. Select Enter password
c. Enter Calibration PWD.
● To enter all menus:
a. Tap and hold for 3 seconds in measuring mode
b. Select Enter password
c. Enter Settings PWD
6.6.4 Displaying Information
Select the appropriate menu item in the Information menu:
The data logger is active in Roll mode.
The data logger is active in stack mode.
SIL SIL operation mode is activated.
Button Function
Upwards / Function key
Downwards / Menu key
Different functions depending on the type of menu
Button Function
Switches to the next screen
Switches to the previous screen
Ends info mode
Button Function
Scrolls upwards.
Sets values.
Scrolls downwards.
Sets values.
Symbol Explanation
M
OK
OK
M
Confirms entry.
Selects menus and functions.
Calibration
PWD Access to information (Information menu) and calibration settings (Calibration
menu)
Default: _ _ _ 1
Settings PWD Access to all configurations and menus
Default: _ _ _ 2
Instrument
Warnings Displays warning messages in plain text
and the corresponding number.
If there are several warning messages
available, there is an indicator (e.g. 1/3 =
Screen 1 of 3).
Faults displays fault messages in plain text and
the corresponding number
If there are several faults, there is an indica-
tor (e.g. 1/3 = Screen 1 of 3).
Device flag This function displays warning and fault
codes as a table. If all codes are 00 there
are no warning or fault messages available.
Modules Displays an overview of the installed hard-
ware modules. To access detailed informa-
tion select the appropriate module.
= installed modules
= not installed modules
Sensor
Last cal.
date The calibration date, unit, gas and concen- tration of the last calibration are displayed.
Next cal.
date Displays the next calibration due date.
Button Function
OK
M
M
M

Calibration | en
Instructions for use | Dräger Polytron®8900 UGLD Firmware version ≥ 4.0.x 15
7 Calibration
Obey the safety statements mentioned in 1 Safety-related
information!
A bump test (calibration check) and adjustment of the
measurement accuracy can be performed with the Dräger
Polytron 8900 UGLD Calibration Kit. Only the sensor span
should be calibrated if the bump test result is out of spec.
Severe ambient conditions or physical impacts to the sensor
may cause sensor drifts. Sensor drifts have a negative impact
on the measurement accuracy. Calibrations restore this
accuracy.
Dräger ultrasonic sensors are life-time calibrated. Under
normal conditions sensor drifts should not occur and a
recalibration should not be necessary.
To verify the sensor is providing correct measurement data,
the sensor should undergo a regular bump test utilizing the
calibration kit.
In general calibration is not necessary. To check whether a
calibration is necessary, first perform a bump test.
7.1 Test gas
The acoustic sound pressure emitted by a leak varies by the
type of target gas, the leak size and the distance to the
device.
Test gas for ultrasonic sensors is compressed air or nitrogen.
The calibration adapter generates the ultrasonic sound
pressure at defined flow rate.
Thus, the calibration adapter generates the needed ultrasonic
signal to calibrate the system span.
7.2 Performing a bump test
Once installed, the instrument typically does not need regular
calibrations. Nevertheless, the calibration can be checked and
performed if a deviation outside the acceptable tolerance is
detected.
A bump test checks alarm activation and sensor sensitivity
without setting off the alarms.
Prerequisites:
– Background noise is < 80 dB.
– Environmental temperatures within 0 °C to 40 °C (+32 °F
to +104 °F).
Calibration equipment:
– Dräger Polytron 8900 UGLD Calibration Kit (8328042)
To perform a bump test:
1. Place the calibration adapter onto the sensor up to the
stop.
2. Enter the menu, see 6.6.3 Entering the menu.
3. Select Settings > Instrument > Bump test and confirm.
The maintenance symbol is displayed
The analog output is set to the maintenance signal.
4. Open calibration gas cylinder valve.
After a short period of stabilization time (~ 10 s), the
displayed value should stabilize at the dB number (or
percentage of measurement range) that is indicated on
the calibration adapter.
If the value deviates by > 3 dB (or 6 %), perform a
span calibration.
5. Press OK to return to measurement.
The calibration adapter must not be soiled. Store the
calibration adapter in a clean environment. Dräger
recommends storing the calibration adapter in the calibration
kit case.
7.3 Preparing a calibration
A calibration needs to be performed in a controlled
environment with the following prerequisites:
– Background noise is < 70 dB.
– Environmental temperatures within +15 °C to +35 °C
(+59 °F to +95 °F).
Calibration equipment:
– Dräger Polytron 8900 UGLD Calibration Kit (83 28 042)
To prepare a calibration:
1. Remove the sensor from the instrument or the remote
sensing head.
2. Take the sensor to a controlled environment.
3. In the controlled environment insert the sensor into a
Polytron 8900 UGLD instrument.
4. Calibrate the sensor by using the calibration kit.
● Performing a zero calibration, see 7.4 Performing a
zero calibration.
● Performing a span calibration, see 7.5 Performing a
span calibration.
5. Re-insert the sensor in it‘s previous location.
6. Re-integrate the instrument into the alarming system.
7.4 Performing a zero calibration
NOTICE
Zero calibrations may cause malfunctions
Zero calibrations should not be necessary.
Zero calibrations set the zero point of the measurement
range.
The zero point of the measurement is < 54 dB and should only
be calibrated if background noise is < 54 dB.
► Do not calibrate the zero point at the installation site with
background noise present.
Sensor
tempera-
ture
The current and the highest sensor tem-
perature is displayed.
Data logger
Logger
status Display the data-logger status (active or non-active)
Graph Displays the history of the past 15 minutes
on a time/concentration graph.

16 Instructions for use | Dräger Polytron®8900 UGLD Firmware version ≥ 4.0.x
en | Troubleshooting
If a zero calibration is still necessary, the ultrasonic sensor
can be detached and calibrated with a separate Polytron 8900
UGLD instrument under workshop conditions.
Calibration can be aborted at any time. To abort calibration
select back.
Prerequisites:
– Calibration is prepared.
To perform a zero calibration:
1. Attach silencer cap to the sensor up to the stop.
2. Enter the menu, see 6.6.3 Entering the menu.
3. Select Calibration > Zero calibration and confirm.
The Maintenance signal is transmitted by the analog
interface, no alarm or fault relays are switched and the
symbol is displayed.
The message Apply zero gas is displayed.
4. Ignore the message Apply zero gas, select Next and
confirm.
The current value is displayed.
5. Once the displayed value is 54 dB, perform calibration.
a. Select calibrate and confirm.
The message please wait... is displayed.
The new zero value is displayed.
b. Select Next and confirm.
6. Select Next and confirm.
The instrument returns to the calibration menu.
7. Detach the silencer cap.
The silencer cap must not be soiled. Store the silencer cap in
a clean environment. Dräger recommends storing the silencer
cap in the calibration kit case.
7.5 Performing a span calibration
Calibration can be aborted at any time. To abort calibration
select back.
Prerequisites:
– Calibration is prepared.
Refer to figure C on the fold-out page.
To perform a span calibration:
1. Check the tubing for holes. The tubing must be leak-proof.
2. Attach the pressure regulator to the compressed air (or
nitrogen) cylinder.
3. Fit calibration adapter to the sensor up to the stop and
orientate the pipe parallel to the mark on the sensing head
housing (figure B 5 on fold-out page).
4. Make sure the gas escapes the calibration adapter freely
within 25 cm (10 inch) from the calibration adapter.
5. Connect the tubing to the barbed fitting.
6. Enter the menu, see 6.6.3 Entering the menu
7. Select Calibration > Span calibration and confirm.
The Maintenance signal is transmitted by the analog
interface, no alarm or fault relays are switched and the
symbol is displayed.
The parameters for calibration are displayed:
Gas : UGLD
Unit: dB (or %)
Concentr.:50
8. Adjust the number at concentration to the number printed
on the calibration adapter.
9. Select Next and confirm.
The message Gas flow ON is displayed.
10. Select Next and confirm.
The current value is displayed
11. Apply the gas flow.
After the displayed value is stable by +/- 1 dB:
12. Select Next and confirm.
The message please wait... is displayed.
The new current value is displayed.
13. Select Next and confirm.
14. Turn off air flow and remove the calibration adapter from
the sensor.
If the current value is not within the alarm range:
15. Select Next and confirm.
The instrument returns to the calibration menu.
The calibration adapter must not be soiled. Store the
calibration adapter in a clean environment. Dräger
recommends storing the calibration adapter in the calibration
kit case.
8 Troubleshooting
8.1 Faults
Fault
number Cause Remedy
001, 003
004
012-014
020-024
043, 060
067
Serious instrument
fault, various causes.
Have the instrument
checked by DrägerSer-
vice.
005 Supply voltage outside
range.
Check power supply.
002
025-027
030-034
041, 042
044, 050
052, 081
085
Serious data error in
the instrument, various
causes.
Reset the instrument to
factory default settings.
If this fault occurs
again: Have the instru-
ment checked by
DrägerService.

Troubleshooting | en
Instructions for use | Dräger Polytron®8900 UGLD Firmware version ≥ 4.0.x 17
8.2 Warnings
010 4 to 20 mA interface
cable not connected.
Disconnect the power
supply, connect the 4 to
20 mA interface and
reconnect the power
supply.
If operated as a stand-
alone instrument with-
out a central controller,
wire pin 3 to pin 4.
011 Serious instrument
fault, various causes.
Have the instrument
checked by DrägerSer-
vice; in case of
repeated occurrence,
check the load or cable.
045 Instrument not detect-
ing any sensor.
Check connections. If
this fault occurs again:
Have the instrument
checked by DrägerSer-
vice.
051, 054 Faulty zero calibration. Perform zero calibra-
tion.
055 Faulty span calibration. Perform span calibra-
tion
076
080-084
Instrument fault. Check electrical con-
nections. If this fault
occurs again: Have the
instrument checked by
DrägerService.
081 Sensor fault (Self test
failure) or Ultrasound
noise level > 100 dB for
more than 1 h detected.
Mute ultrasound noise
or temporarily cover
sensor with silencer
cap. If error remains
longer than 1 h, replace
sensor.
090 Sensor lock function is
activated. A sensor with
a different part number
has been connected.
Use a sensor with the
same part number or
disable the sensor lock
function.
105 Instrument fault. Have the instrument
checked by DrägerSer-
vice.
137 Instrument fault. Cycle power.If this fault
occurs again: Have the
instrument checked by
DrägerService.
064
071
Communication fault. Check connection to
Polytron 8900 UGLD.
086 Supply voltage outside
range.
Check supply voltage.
087 4 to 20 mA fault at
UGLD sensor.
Check 4 to 20 mA con-
nection to Polytron
8900 UGLD.
Fault
number Cause Remedy
094
095
Data error in the instru-
ment.
Reset the sensor to fac-
tory default settings. If
this fault occurs again:
Have the instrument
checked by DrägerSer-
vice.
096 SIL password does not
match.
Enter password again.
Warning
number Cause Remedy
101 Data-logger in Stack
mode is 100 % full and
is not logging any more
data.
Have the instrument
checked by DrägerSer-
vice.
102 Data-logger in Stack
mode is 90 % full.
Download the data as
soon as possible and
clear the data-logger.
103
106
Data error in the instru-
ment. Some dongle
functions like data-log-
ger, sensor test, etc.
may no longer be avail-
able.
Reset the instrument to
factory default settings.
If this error occurs
again: Have the instru-
ment checked by
DrägerService.
104 Date or time setting not
valid.
Set date and time
105 Instrument fault. Have the instrument
checked by DrägerSer-
vice.
107 Battery for data mem-
ory empty.
Have the instrument
checked by DrägerSer-
vice.
110
111
112
SW dongle has been
removed without being
deactivated.
Deactivate SW dongle.
113 Alarms inhibited. Enable alarms
164
165
Sensor warm-up phase
has not ended.
Increased measure-
ment error must be
expected.
Wait until the sensor
has warmed up. Do not
calibrate before sensor
is fully warmed-up.
167
170
Calibration interval
expired.
Recalibrate the instru-
ment.
163 Sensor temperature is
very high.
171 Zero drift too high. Perform zero calibra-
tion
182 Auto calibration not
possible.
Perform new zero and
span calibration
Fault
number Cause Remedy

18 Instructions for use | Dräger Polytron®8900 UGLD Firmware version ≥ 4.0.x
en | Maintenance
9 Maintenance
– The maintenance intervals must be established for each
individual installation. Depending on safety considerations
and application specific conditions the instrument is used
in, these might need to be shortened.
Every 12 months
– Inspection by trained service personnel.
– Check signal transmission to the control unit, LEDs and
triggering of alarm devices.
– Perform bump test
9.1 Sensor replacement
A sensor can be replaced in the hazardous, classified area,
without interrupting the power supply.
Sensor change function
With the menu function Change Sensor, a sensor can be
changed during operation without triggering a fault signal at
the control unit. It also ensures that all sensor data in the
microprocessor can be saved in the sensor memory
(EEPROM) before disconnecting the sensor.
Replacing the sensor
Refer to figure B on the fold-out page.
A sensor can be replaced at any time.
1. Select Settings > Sensor > Change Sensor and confirm.
The maintenance signal is generated on the 4-20mA
interface. The display shows Please remove the
sensor.
The Maintenance symbol is displayed.
2. Replace the old sensor with a new sensor:
a. Loosen set-screw (2)
b. Unscrew bayonet ring (3)
c. Remove old sensor.
d. Insert sensor (4) into the opening. The Dräger logo on
the sensor must point to the mark on the sensing head
housing (5).
e. Lock sensor with bayonet ring (3)
f. Tighten set-screw (2).
The display shows: Loading data, please wait
3. When the sensor data are loaded, the display shows: Data
loaded.
4. Select Back to menu and confirm.
The maintenance signal on the 4-20mA interface
remains pending until the sensor is warmed-up.
5. Perform bump test to check the instrument for proper
operation.
6. Check the installation requirements and instrument for SIL
status.
10 Instrument settings
10.1 Alarms and delay
To avoid false alarms triggered by short ultrasonic peaks,
do not use alarm settings of the instrument without alarm
delay.
10.1.1 Changing unit
The displayed unit can be changed to the relative unit % of
the measuring range.
1. Select Settings > Sensor > Gas settings > UGLD > %
and confirm with OK.
Range /% 100.00 is displayed.
Do not change this range!
2. Select Next and confirm with Confirm.
✓The unit is changed.
10.1.2 Switching the alarms on or off
If the alarm is set to Off, an alarm condition will not be shown
by the LEDs or asserted relays! Using relays the maintenance
signal is transmitted via the 4-20 mA interface and the symbol
is displayed.
1. Select Settings > Instrument > Alarm > Alarm on/off.
2. Select Enable or Disable and confirm.
10.1.3 Configuring alarms
1. Select Settings > Instrument > Alarm > Alarm A1 or
Alarm A2 and confirm.
The current alarm threshold is displayed.
2. Apply settings and confirm the configuration steps
successively with Next.
a. Set value for alarm threshold.
b. Set alarm direction.
c. Set latching mode.
d. Set acknowledgement mode.
Rising The alarm direction is called rising, if the
gas concentration has to exceed a certain
value to activate an alarm.
Falling The alarm direction is called falling, if the
gas concentration has to fall below a certain
value to activate an alarm.
Latching Once the alarm threshold is reached, the
instrument will trigger the alarm. It will
remain in alarm status even if the gas con-
centration does not meet the alarm condi-
tion any more. To clear a latching alarm it
has to be acknowledged.
Non-latching The alarm status clears if the gas concen-
tration does not meet the alarm condition
anymore.

Instrument settings | en
Instructions for use | Dräger Polytron®8900 UGLD Firmware version ≥ 4.0.x 19
e. Set the hysteresis mode.
The hysteresis function defines an interval where a
triggered relay maintains its status until the gas
concentration is outside the defined interval. Example:
Alarm threshold is set to 75 dB and hysteresis to 3 dB.
The alarm stays active until the value falls below
72 dB. This prevents relays from chattering at an alarm
threshold.
When the direction of an alarm was changed (from
falling to rising or vice versa), the value of the
hysteresis must be checked and corrected again if
necessary.
A confirmation screen shows all settings.
f. Select Confirm and confirm with OK.
✓The new settings are saved.
10.1.4 Adjusting alarm delay time and analyzed
time
The alarm delay time is per default set to 30 seconds and can
be adjusted between 1 second and the analyzed time.
The analyzed time is per default set to 60 seconds and can
be adjusted by DrägerService only between 1 second and
240 seconds.
1. Select Settings > Sensor > UGLD delay > Delay and
confirm.
2. Enter new alarm delay time in seconds and confirm with
OK.
3. Select Confirm and confirm with OK.
✓The new alarm delay time is saved.
10.1.5 Activating delay function
The delay function can be individually activated for the
display, the alarm relays and the 4-20 mA output signal.
1. Select Settings > Sensor > UGLD delay and confirm.
2. Select desired output and confirm: Display, Alarm
Relays and 4-20 mA.
3. Select Enable or Disable for each output and confirm with
Back to menu.
✓The delay function is activated for the selected output(s).
10.1.6 Setting analog output signal (4-20 mA)
characteristic
1. Select Settings > Communication > Analog interface >
UGLD signals and confirm.
2. Select analog output signal characteristic and confirm:
3. Select Back to menu and confirm.
✓The new settings are saved.
10.2 Testing alarms/relays
These functions change the status of a relay and LED for test
purposes (e.g. to check the function of alarm devices
connected to the relay) and the symbol is displayed. After
exiting this function, the status of the relay and LED will
automatically return to their previous status.
1. Select Settings > Instrument > Alarm the desired alarm
condition and confirm.
2. Select Enable or Disable and confirm.
✓If the function is activated, the fault relay is de-energized
and the 4 to 20 mA interface is set to the fault current. The
yellow LED is lit, the symbol for maintenance is shown.
10.3 Setting passwords
1. Select Settings > Instrument > Passwords the desired
password and confirm.
2. Select the line for editing the password and confirm.
3. Set the password and confirm.
4. Select Confirm and confirm with [OK].
10.4 Setting date and time
1. Select Settings > Instrument > Date and time and
confirm.
2. Select the line for editing the date or time and confirm.
3. Select Confirm and confirm with [OK].
10.5 Setting language
1. Select Settings > Instrument > Language and confirm.
2. Select a language from the list and confirm
Acknowledge-
able Alarm relay and LED can be reset before alarm condition clears.
Non-acknowl-
edgeable Alarm relay and LED can not be reset until the alarm condition clears.
Pre-Acknowl-
edgeable Alarm status is acknowledgeable before the alarm condition clears. However, the alarm
relay and LED stay active until the alarm
condition clears.
Alarm normal The 4-20 mA reacts proportional to the
detected ultrasonic signal.
Alarm
enhanced The 4-20 mA reacts proportional to the detected ultrasonic signal until an alarm is
reached. The signal then jumps to 16 mA if
A1 is triggered and to 20 mA if A2 is trig-
gered.
Alarm only The analog output signal stays at 4 mA until
an alarm is reached. The signal then jumps
to 16 mA if A1 is triggered and to 20 mA if
A2 is triggered.
Set Alarm A1 Simulates pre-alarm
Set alarm A2 Simulates main alarm
Set fault Simulates fault signal
Calibration
PWD Access to zero and span calibration
Settings PWD Access to all configuration parameters

20 Instructions for use | Dräger Polytron®8900 UGLD Firmware version ≥ 4.0.x
en | Interface settings
10.6 Configuring function key
1. Select Settings > Instrument > Function key and
confirm.
2. Select a function and confirm.
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.
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.
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.
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.
Address Description
0 Setting the polling address to
0 activates analog operation
(4 to 20 mA).
0 - 15 Setting the polling address to
0 activates analog operation
(4 to 20 mA).
REGARD SW 2.0 Default setting
REGARD SW 1.4 For REGARD controllers with
SW 1.4