Dräger Polytron 3000 User manual

Dräger Polytron 3000
(approved as type P3S)
Transmitter for electrochemical Sensors
Instructions for Use
ST–691–2002.eps

Contents
2
Contents
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
For Your Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Intended Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Installing the transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Preparing for installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Installing the docking station . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
How to install the electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Installing the 4 to 20 mA current loop on the transmitter . . . . . . . . . . . . . 8
Connecting to the central unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Installing the transmitter in areas subject to explosion hazards of zone 0 or
zone 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Installing the transmitters in explosion-hazard areas of zone 2, or in areas
not subject to explosion hazards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Installing the transmitters in non-explosion-hazard areas . . . . . . . . . . . 10
Installing the measuring unit Dräger Polytron 3000 . . . . . . . . . . . . . . . . . . .10
Fitting the sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Maintenance intervals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Unit calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Calibrating the zero point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Calibrating the sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Replacing the sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Fault – Cause – Remedy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Order List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Polytron 3000 measuring units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
ATEX approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
IECEx approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
UL approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
CSA approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Drilling templates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Dräger docking station . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

3
For Your Safety
For Your Safety
Strictly follow the Instructions for Use
Any use of the apparatus requires full understanding and strict observation of
these instructions. The apparatus is only to be used for purposes specified here.
Maintenance
The unit must be inspected and serviced regularly by suitably qualified persons.
Repair and general overhaul of the apparatus may only be carried out by trained
service personnel.
We recommend that a service contract be obtained with DrägerService and that
all repairs also be carried out by them. Only authentic Dräger spare parts may be
used for maintenance.
Observe chapter "Maintenance Intervals".
Use in areas subject to explosion hazards
Equipment and components which are used in explosion-hazard areas and which
have been inspected and approved in accordance with international or European
explosion-protection regulations may be used only under the specified conditions.
The equipment 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 the equipment or components.
If the transmitter has been installed with a suitable safety barrier, its case may be
opened or the sensor may be changed while the transmitter is operating.
Accessories
Use only accessories shown in the Ordering List.
CAUTION
When the transmitter is installed in Ex areas Class II, Div. 1 & 2, Groups E, F, G,
the opening of the housing (inclusive sensor replacement) must not be done
when connected to power (power must be turned off or the area has to be tempo-
rarily declassified). Explosion hazard!
In applications where category 1G (Zone 0) or EPL Ga devices are required,
intense electrostatic charging processes must be avoided.

Intended Use
4
Intended Use
— Calibration by one person even in areas subject to explosion hazards.
— For connection to Dräger central units or to a programmable logic controller (PLC) to warn against physiologically harmful
gas concentrations.
— The optional display on the transmitter indicates the actual gas concentration and makes calibration easier.
False alarms during calibration are avoided by a special maintenance mode with output of a maintenance signal.
_______________
® Polytron is a registered trademark of Dräger.
DrägerSensor is a registered trademark of Dräger.
Dräger Polytron®3000 Transmitter for electrochemical sensors
— For stationary, continuous monitoring of gas concentrations in ambient air, with
built-in DrägerSensor®.
— For indoor and outdoor use.
— Suitable for use either in mines where firedamp may occur in accordance with
device category M1 or in potentially explosive atmospheres of Zone 0, Zone 1 or
Zone 2 in accordance with device category 1G, 2G or 3G.
For further details, see the installation notes.
ST–691–2002–1.eps

5
Design
Design
Polytron 3000 is designed for connection to the Dräger Polytron, Regard, Quad-
Gard or Unigard central units.
The Polytron 3000 transmitter may also be connected to other central units if the
following conditions are met:
— Industrial standard 4 to 20 mA input signal
— Operating voltage at the transmitter 12 to 30 V DC.
On delivery, Polytron 3000 is configured for the measuring range and gas to be
measured. This information can be found on a sticker below the service port and on
the back of the measuring unit. The Order No. of the sensor to be used is also spe-
cified there.
Two different versions of the Polytron 3000 transmitter are available:
Polytron 3000 transmitter with display
This version is intended for installations requiring local indication of the measured
value.
The transmitter is calibrated with the aid of two potentiometers and the display.
Polytron 3000 transmitter without display
This version is intended for installations in which local indication of the measured
value is not required.
A digital voltmeter is required for calibration.
Optional extras:
Duct Extension
For mounting the Polytron 3000 transmitter on a duct.
For measuring the gas concentration in the pipe or duct. This option does not affect
the explosion-protection approval of the transmitter.
ST–691–2002–1.eps
ST–691–2002–2.eps

Installing the transmitter
6
Installing the transmitter
Preparing for installation
The performance and effectiveness of the entire system depends essentially on the
position chosen for installing the transmitter.
The following should be noted during installation:
— Local requirements and regulations governing the installation of gas measuring
systems.
— Relevant regulations concerning the connection and routing of electric power
supply and signal lines.
— The full scope of environmental factors to which the transmitter may be exposed
(ambient conditions: see Technical data, page 19).
— Physical properties of the gas to be measured:
For gases with a density lower than that of air, the transmitter must be lo-
cated above any possible leak or at the highest point at which large concen-
trations of gas may occur.
For gases and vapours with a density greater than that of air, the transmitter
must be located below a possible leak or at the lowest point at which such
gases and vapours may occur.
— The specific uses (e.g. possible leaks, ventilation conditions, etc.).
— Accessibility for the necessary maintenance work (see Installation instructions
for the Polytron docking station).
— All other factors and conditions which could have a negative effect on the instal-
lation and operation of the system (such as vibrations or varying temperatures).
— We recommend installing a reflective shield if the unit is exposed to strong sun-
light.
— The transmitter must be installed vertically (sensor facing downwards).
— The transmitter has been tested with regard to its weather-resistance and may
be installed out of doors. Use of a splash guard is recommended to protect the
sensor from splashing water, dust and wind.
The Dräger Polytron 3000 transmitter consists of two main components:
— Dräger docking station
This can be pre-installed anywhere and contains the electrical installation com-
ponents.
— The measuring unit Dräger Polytron 3000
contains the electronics of the transmitter.
If the measuring unit is not fitted immediately after installing the docking station, the
latter should be covered with the raincover provided (dust and water protection) to
protect against dust and splashing water.
NOTE
In explosion-hazard areas:
Observe the national regulations concerning electrical equipment in
explosion-hazard areas.

7
Installing the transmitter
Installing the docking station
— If the transmitter is to be installed in a Zone 2 explosion-hazard area, select a
location with low exposure to mechanical risk.
— Docking station is installed vertically (transmitter with sensor facing down) in an
area with low vibrations and stable temperatures – near the possible leak.
— A space of at least 15 cm (6") must be maintained above the transmitter for in-
stallation of the measuring unit.
— A space of at least 10 cm (4") – preferably 30 cm (12") – must be maintained be-
low the docking station to permit access for maintenance.
Unpack the docking station.
1Remove raincover (protection against dust and splashing water).
2Remove the 4-pole terminal block (Part No. 83 16 422), keep it in a safe place
and insert it again after completion of the installation work.
A drilling template is provided on page 64. The mounting holes are 66 ±4 mm
(2.6 ± 0.16") apart.
If the measuring unit is not to be mounted at this time:
Refit the raincover (protection against dust and splashing water).
CAUTION
Spacers (e.g. mounting bracket 68 09 951) must be used to prevent any twisting
of the housing when installed on uneven surfaces.
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Installing the transmitter
8
How to install the electrical connections
— The electrical wiring may be laid and connected only by a qualified electrician,
who must also comply with the appropriate regulations – a screened or uns-
creened cable (such as LiY, LiYCY) may be used.
— Connection to central device with at least 2-wire cable, 0.5 to 2.5 mm2.
— For currents of 0 to 22 mA, a DC voltage between 12.0 V DC and 30 V DC must
be present at the transmitter.
Installing the 4 to 20 mA current loop on the transmitter
Fit 2-wire connecting cable in cable gland, cut to length and strip ends
(approx. 80 mm / 3.15").
Shorten the shield (if installed) to prevent short-circuiting:
Connect cable
12-pin terminal for Polytron 3000 – check polarity (marking in the docking station).
Cut excess wires short or
2Fasten in 4-pin terminal.
1Slide connecting terminal back into holder.
Secure cable in holder.
Fold up the installation notes and place them in the Dräger docking station for
future use during commissioning.
Refit raincover (protection against dust and splashing water).
Connecting to the central unit
Connect shield to earth of central unit (e.g. housing, earth bar, etc.).
Connecting the Dräger Polytron 3000 transmitter to a Dräger control unit
(such as Regard, QuadGard, Unigard or Polytron):
— Further information about the connection can be found in the instructions for
the Dräger control unit.
Connecting the Dräger Polytron 3000 transmitter to control units with
a 4 to 20 mA interfaced made by other manufacturers:
— For operation together with control units made by other manufacturers, care
must be taken that the voltage at the transmitter does not drop below 12 V. The
supply voltage, the resistance of the cable and the load and the resistance of any
installed safety barrier must be taken into account.
— Further information about the connection can be found in the instructions for the
control unit being used.
Installing transmitter in mines where firedamp may occur
— Install a safety barrier with the appropriate explosion protection approval
(category M1) between the transmitter and the control unit.
— Only safety barriers or power supply units with the following characteristics may
be used:
UO(VOC) ≤30 V, IO(ISC) ≤0.3 A, PO≤700 mW.
Make sure the maximum permissible capacitance and inductance connected to the
safety barrier or power supply are not exceeded (taking into account the line as
well). The safety-related input parameters of the transmitter are as follows:
Ci = 0 nF, Li = 50 μH.
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9
Installing the transmitter
Installing the transmitter in areas subject to explosion hazards of zone 0
or zone 1
Install a safety barrier with the appropriate explosion protection approval
(category 1, 2 or Div. 1) between the transmitter and the control unit.
— Only safety barriers with the following characteristics may be used: Uo(Voc)
≤30 V, Io(Isc) ≤0.3 A, Po≤700 mW.
— Take care that the maximum permissible capacitance and inductance of connec-
tions to the safety barrier are not exceeded, also taking the cable into account.
The safety-related input parameters of the transmitter are: Ci= 0 nF, Li = 50 µH.
Transmitter supply units
(without HART-communication between Ex/Non-Ex area)
The following safety barriers are provided as examples only. Selected barriers must
be acceptable to the authority having jurisdiction and comply with the assigned P3S
entity parameters also taking the cable into account.
— Connect shielding to earth point and/or 0 V (Ex i).
Installing the transmitters in explosion-hazard areas of zone 2, or in
areas not subject to explosion hazards
— Use only supply units or a safety barrier classified as device category 3.
— Only supply units or safety barriers with the following characteristics may be
used: UO(VOC) ≤30 V, IO(ISC) ≤0.3 A, PO≤700 mW.
— Take care that the maximum permissible capacitance and inductance of connec-
tions to the supply unit are not exceeded, also taking the cable into account.
The safety-related input parameters of the transmitter are:
Ci= 0 nF, Li = 50 µH.
Manufacturer Type suitable for Line (Loop)
MTL MTL 5041 Zone 0, Div. 1 ≤190 Ω
Pepperl & Fuchs KFD2–STC4–Ex1 Zone 0, Div. 1 ≤140 Ω
KFD2–STC1–Ex1 Zone 0, Div. 1 ≤140 Ω
CAUTION
The category 1 marking has to be cut out from the rating-plate label. Once the unit
has been used after installation in the above manner, it may never be installed in
explosion-hazard areas of zone 0 or zone 1 (device category 1 or 2).
Explosion hazard!
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Non-explosion-hazard areaExplosion-hazard area, zone 0, 1 or Div. 1
Safety barrier
Control unit
Ex i
PA
Earth point
4 ... 20 mA
0 V
+
–
+
4 to 20 mA
+24 V

Installing the transmitter
10
Installing the transmitters in non-explosion-hazard areas
Installing the measuring unit Dräger Polytron 3000
Remove the rain cover from the previously installed docking station.
Examine seal for signs of dirt and clean if necessary.
1Check position of eccentric catches and correct if necessary.
The eccentric opening must point upwards, engaged position.
Check the polarity (marking in the docking station) and cable routing and check
that the connector is securely seated; rectify as necessary (see the installation
notes for the Polytron docking station).
Unpack the measuring unit Dräger Polytron 3000.
2Insert the measuring unit about halfway up the docking station and slide it in as
far as it will go.
3Lower the unit along the front edge of the docking station. About 5 mm before its
hits the stop, the resistance will increase as the connector engages with the sok-
ket on the printed circuit board.
1Turn the eccentric catches clockwise with an Allen key to lock the measuring unit
(
= approx. 180o).
CAUTION
The explosion-protection markings has to be removed from the transmitter. Once
the transmitter has been used after installation in this manner, it may never be
installed in explosion-hazard areas.
CAUTION
Use only a 5 mm Allen key without a ball head.
00533020_1_en.eps
Non-explosion-hazard area
Control unit
4 ... 20 mA
0 V
+
–
+
4 to 20 mA
+24 V
Ex-hazard area, zone 2 or non explosion-hazard area
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11
Installing the transmitter
Fitting the sensor
1Remove bayonet ring from transmitter, remove dummy plate.
2Open the front cover of the service port with an Allen key by turning anticlockwise
(approx. 60o).
3Only use the DrägerSensor specified on the sticker on the Polytron 3000 measu-
ring unit.
Remove sensor from packaging.
Remove short-circuit jumper from sensor if installed.
There is a coded connector on the back of the sensor. Place the sensor in the
opening with the connector at the back and the Dräger logo at the front.
Before plugging the connector in the socket, ensure that they are identically co-
ded. Incorrect connection can damage the sensor!
Secure sensor in transmitter with bayonet ring.
If the manufacturer's calibration setting for the sensor is to be used:
Open the front cover of the service port with an Allen key by turning anticlockwise
(approx. 60o). The maintenance switches and potentiometers for calibration are
now revealed.
4Jumper J1 must be set over the two left-hand pins or removed completely.
If the transmitter is specifically to be calibrated with calibration gas:
Open the front cover of the service port with an Allen key by turning anticlockwise
(approx. 60o). The maintenance switches and potentiometers for calibration are
now revealed.
5Jumper J1 must be set over the two right-hand pins.
CAUTION
Use only a 5 mm Allen key without a ball head.
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Polytron
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3

Start-up
12
Start-up
Switch on power supply.
The transmitter begins its warm-up routine.This is indicated by a flashing dis-
play. The warm-up phase takes between 5 minutes and 12 hours, depending
on the sensor installed. Note the information in the sensor data sheet. The
warm-up phase may take longer in extremely high or low temperatures. It is
completed when the display stops flashing.
When the sensor has warmed up:
— Transmitters set for specific calibration with calibration gas
Calibrate sensor, page 14.
— Transmitters set for use of the manufacturer's calibration setting for the sensor
Transmitter is ready for use.
Check signal transmission to the central unit and alarm output.
Analogue signal
— A current between 4 and 20 mA flows through the transmitter during normal ope-
ration. This current is proportional to the gas concentration.
— Polytron 3000 uses various current values to indicate the operating status of the
transmitter:
Display (optional)
Current Meaning
4 mA Zero point
20 mA Full-scale value
<3.2 mA Transmitter fault
3.8 mA ... 4 mA Sensor drift below zero point
20 mA ... 20.5 mA Full-scale value exceeded
3.4 mA ±0.2 mA
constant
Maintenance signal
— In measuring mode, the display shows the actual gas concentration, e.g.:
— The following symbols may be displayed during measurement:
— If a fault has been detected:
— If the measuring range has been exceeded:
— If the zero point is too low (sensor drift below the zero point):
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13
Maintenance
Maintenance
Maintenance intervals
Before starting operation:
Check the calibration, see page 14.
Check the transmission of signals to the control unit and the triggering of alarms.
At regular intervals,
to be defined by the person responsible for the gas warning installation:
Check the transmission of signals to the control unit and the triggering of alarms.
If a selective filter specific to the sensor is being used:
Replace the selective filter –
See the related operating instructions for the sensor for details of the capacity
of the selective filter being used.
At regular intervals defined in accordance with the sensor being used by the
person responsible for the gas warning system:
Calibrate the sensor, see page 14.
The interval for regular calibration depends on the sensor being used and on the
operating conditions.
Specific calibration data for the sensor, see the operating instructions for the
sensor.
Every six months:
Inspection by specialists.
The inspection intervals must be established in each individual case and shor-
tened if necessary, depending on technical safety considerations, engineering
conditions and the technical requirements of the equipment.
We recommend that a service agreement be concluded with DrägerService
and that repairs also be carried out by them.
As required:
Replace sensor, page 17.

Maintenance
14
Unit calibration
— Ensure that the sensor is warmed up before it is calibrated. See the sensor data
sheet for the warming-up time.
— Only the zero point is checked if an oxygen sensor has been fitted. The zero
point of an oxygen sensor does not require calibration.
— The transmitter can be calibrated by the operator on site.
—For critical applications, the calibration intervals should be defined in accor-
dance with the recommendations in EN 500731), EN45544-42) and national re-
gulations.
Note the calibration sequence!
First check the zero point and correct it necessary, Immediately after this, check
the sensitivity and adjust it as necessary.
— Never calibrate the sensitivity before calibrating the zero point.
— Zero gas and test gas: see the information in the sensor data sheet.
Open the front cover of the service port with an Allen key by turning anticlockwise
(approx. 60o). The maintenance switch and potentiometers for calibration are
now revealed.
Measuring / maintenance mode
1Maintenance switch with two positions.
2Measuring mode position (left-hand position) – measured values are relayed to
the analogue output.
3Maintenance mode position (right-hand position) – a maintenance signal (3.4
mA ±0.2 mA constant) is relayed to the analogue output and prevents alarms
being triggered.
CAUTION
When the transmitter is installed in Ex areas Class II, Div. 1 & 2, Group E, F, G,
the opening of the housing (required for calibration) must not be done when con-
nected to power (power must be turned off or the area has to be temporarily
declassified). Explosion hazard!
1) EN 50073 – Guidelines for selection, installation, use and maintenance of devices for
the detection and measurement of flammable gases and oxygen.
2) EN 45544-4 – Electrical devices for the direct detection and direct concentration
measurement of toxic gases and vapours – Part 4: Guidelines for selection, installa-
tion, use and maintenance.
CAUTION
Test gas must not be inhaled. Risk to health! Care must be taken about the
risks which can arise when using test gas; hazard instructions and safety advice
must be observed.
For details, see appropriate DIN Safety Data Sheets.
CAUTION
Use only a 5 mm Allen key without a ball head.
NOTE
The Dräger Polytron 3000 does not support the storage of calibration data in the
sensor data base.
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15
Maintenance
Output for calibration
4Connect voltmeter (mV setting, Ri > 10 MΩ) to test points TP1 and TP2 (required
for the version without display).
— If a fault is detected, the voltmeter shows –200 mV.
— Voltage output –200 to 1100 mV:
–200 mV corresponds to a fault
–0 mV corresponds to zero concentration
–1000 mV corresponds to the 100 % measuring range end value
Jumper
5Jumper J1 can be set to two positions.
6The left-hand position or complete removal of jumper J1 in order to use the ma-
nufacturer's calibration setting for the sensor.
7The right-hand position for calibration with calibration gas and the potentiome-
ters for zero point and sensitivity.
— Only the manufacturer's calibration setting for the sensor can be used when jum-
per J1 is set over the two left-hand pins.
— Calibration with calibration gas can be performed when jumper J1 has been set
over the two right-hand pins.
Operating elements
8Potentiometer (left) for calibration of the zero point.
9Potentiometer (right) for calibration of the sensitivity.
CAUTION
For operation in explosion-hazard areas:
Only use intrinsically safe voltmeters with electrical parameters to the following
specifications:
Ui (Vmax) ≥ 7.6 V; Ii(Imax) ≥ 1 mA; Uo(Voc) ≤10.4 V; Ci≤2.5 µF; Li≤10 mH (Co
(Ca) and Lo(La) are not relevant as Ciand Liof the test point circuit are zero)
MiniGrabber©Test Clips from Pomona Electronics (order no. 4723 or 4826) shall
be used for connecting the voltmeter.
The jumper J1 must be connected to the right-hand pin, when connecting the volt-
meter.
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–
TP1 TP2
4
mV
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7
J1
5
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Maintenance
16
Calibrating the zero point
For all sensors except oxygen sensor:
The zero point can be calibrated without the use of nitrogen (zero gas) when the
ambient air is free from measuring gas and other interfering gases. Alternatively:
1Use the calibration adapter.
Set maintenance switch to maintenance position, see page 14.
Let nitrogen flow through the calibration adapter at a rate of approx. 0.5 L/min.
Synthetic air may also be used, except when calibrating oxygen sensors.
Wait for the measured value to stabilise – approx. 3 minutes. Note the informa-
tion in the sensor data sheet.
2Set potentiometer for zero point so that the display shows 0 and the digital volt-
meter 0 mV ±2 mV.
Oxygen sensors:
The zero point cannot be calibrated for these sensors. The zero point is merely
checked.
Switch off calibration gas and remove calibration adapter.
Set maintenance switch to measuring position, see page 14.
Calibrating the sensitivity
— The recommended calibration gas concentration for optimum accuracy is bet-
ween 40 % and 100 % of the measuring range end value.
1Use the calibration adapter.
Set maintenance switch to maintenance position, see page 14.
Let calibration gas flow through the calibration adapter at a rate of approx. 0.5 L/
min.
— Wait for the measured value to stabilise – approx. 3 minutes. Note the informa-
tion in the sensor data sheet.
3Set the potentiometer for sensitivity so that the display shows the concen-
tration of the calibration gas or the digital voltmeter shows the calculated
voltage mV.
Calculation of the voltage Vexp between test points TP1 and TP2:
Vexp = Concentration of calibration gas ÷ Measuring range x 1000 mV
Switch off calibration gas and remove calibration adapter.
Wait until the measured value drops below the alarm threshold set on the central
unit. Otherwise an alarm will be triggered when the maintenance switch is retur-
ned to the measuring position immediately after calibration.
1Set maintenance switch to measuring position, left-hand position. The 4 to 20
mA output changes to measuring mode.
Refit the front cover of the service port and lock it in place by turning clockwise
with an Allen key (approx. 60o).
CAUTION
Test gas must not be inhaled. Risk to health!
Care must be taken about the risks which can arise when using test gas; hazard
instructions and safety advice must be observed.
For details, see appropriate Safety Data Sheets.
Example: Concentration of calibration gas 250 ppm CO
Measuring range 0 to 300 ppm CO
Calculated voltage: 250 ppm
Vexp = x 1000 mV = 833 mV
300 ppm
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17
Maintenance
Replacing the sensor
The sensor can be replaced, if necessary, without interrupting the power supply in
the explosion-hazard area.
Use only DrägerSensors which are approved for use with the Dräger Polytron 3000
transmitter.
Open the front cover of the service port with an Allen key by turning anticlockwise
(approx. 60o). The maintenance switch and potentiometers for calibration are
now revealed.
1Set maintenance switch to right-hand position. The 4 to 20 mA output changes
to maintenance mode. In this position, a maintenance signal is relayed to the
analogue output and prevents alarms being triggered.
2Remove bayonet ring from transmitter; pull out old sensor.
3Remove sensor from packaging. Ensure that the sensor is of the same type as
that specified on the sticker on the measuring unit.
Remove the short-circuit strap from the sensor (if it is fitted).
There is a coded connector on the back of the sensor. Place the sensor in the
opening with the connector at the back and the Dräger logo at the front.
Before plugging the connector in the socket, ensure that they are identically co-
ded. Incorrect connection can damage the sensor!
2Secure sensor in transmitter with bayonet ring.
Wait until the measured value drops below the alarm threshold set on the central
unit. Otherwise an alarm will be triggered when the maintenance switch is retur-
ned to the measuring position immediately after the sensor replacement.
1Set maintenance switch to left-hand position.
The 4 to 20 mA output changes to measuring mode.
Refit the front cover of the service port and lock it in place by turning clockwise
with an Allen key (approx. 60o).
When the sensor has warmed up:
— Transmitters set for specific calibration with calibration gas
Calibrate sensor, page 14.
— Transmitters set for use of the manufacturer's calibration setting for the sensor.
Transmitter is ready for use.
Disposal of electrochemical sensors:
— Sensors must be disposed of as special waste.
Note the relevant waste disposal regulations.
Further information can be obtained from the relevant local authority and
from appropriate waste disposal companies.
CAUTION
When the transmitter is installed in Ex areas Class II, Div. 1 & 2, Group E, F, G the
opening of the housing (inclusive sensor replacement) must not be done when
connected to power (power must be turned off or the area has to be declassified)!
Explosion hazard!
CAUTION
Use only a 5 mm Allen key without a ball head.
CAUTION
Do not throw sensors into the fire – explosion hazard.
Do not open sensors forcibly – risk of caustic burns.
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Fault – Cause – Remedy
18
Fault – Cause – Remedy
Fault Cause Remedy
Flashing display Sensor warms up Wait for warm-up phase to end.
Display Equipment fault,
e.g. wrong sensor installed
Only use a sensor with the gas type, Part No.
and measuring range indicated on the sticker.
Display Measuring range end value exceeded Wait until the gas concentration is within the
measuring range.
Display Value too far below zero point Calibrate zero point if fault occurs frequently.

19
Technical Data
Technical Data
The measuring range and the measuring properties depend on which type of sensor is installed – see the operating instructi-
ons for the sensor being used.
CE markings — Devices and protective systems for use for the intended purpose in explosion-ha-
zard area (Directive 94/9/EC)
— Electromagnetic compatibility (Directive 2004/108/EEC) max. influence on sen-
sor: ≤2 x repeatability
Ingress protection IP 66 / IP 67, according to EN 60 529 / IEC 529 (NEMA 4)
Approvals Polytron 3000 is certified as type P3S.
ATEX Device markings in accordance with 94/9/EC
P3S
II 1G / I M1
Ex ia IIC T4 Ga (–40 oC ≤Ta ≤+65 oC)
Ex ia IIC T6 Ga (–40 oC ≤Ta ≤+40 oC)
Ex ia I Ma
II 3G
Ex ic IIC T4 Gc (–40 oC ≤Ta ≤+65 oC)
Ex ic IIC T6 Gc (–40 oC ≤Ta ≤+40 oC)
BVS 03 ATEX E 406 X
Power Supply: Ui= 30 V, Ii= 0,3 A, Pi= 700 mW, Ci= 0 nF, Li= 50 µH
Meter Circuit, II 1G/3G: Uo = 7.6 V, Io = 1 mA, Ui = 10.4 V, Co = 2.5 µF, Lo = 10 mH
Year of manufacture (indicated by Serial No.) 1)
Dräger Safety, 23560 Lübeck, Germany
1) Year of construction is coded by the third letter in the serial number shown on the rating plate: A = 2009, B = 2010, C = 2011, D =
2012, E = 2013 etc.
Example: Serial No. ARDH-0054: the third letter is D, which means that the unit was manufactured in 2012.
Safety parameters for the supply-voltage and signalling circuit (centre terminals of
the docking station):
Ui= 30 V, Ii= 0,3 A, Pi= 700 mW, Ci= 0 nF, Li= 50 mH
IECEx P3S
Ex ia IIC T4 Ga (–40 oC ≤Ta ≤+65 oC)
Ex ia IIC T6 Ga (–40 oC ≤Ta ≤+40 oC)
Ex ia I Ma
IECEx BVS 04 0003 X
Power Supply: Ui= 30 V, Ii= 0,3 A, Pi= 700 mW, Ci= 0 µF, Li= 50 µH
Year of construction (via serial number) 1)
Dräger Safety, 23560 Lübeck, Germany
0158
0158

Technical Data
20
UL (Underwriters Laboratories Inc.) P3S
Only as to Intrinsic Safety for use in Hazardous Locations
Class I, Div. 1, Groups A, B, C, D
Class II, Div. 1, Groups E, F, G
Use in accordance with Dräger Control Drawing SE20105.
T4: –40 ≤Ta ≤+65 oC, T6: –40 ≤Ta ≤+40 oC.
Not tested in oxygen enriched atmospheres (>21 % O2).
Power Supply: Vmax = 30 V, Imax = 0.3 A, Pi= 700 mW,
Ci= 0 nF, Li= 50 µH
Meter circuit: Voc = 7.6 V, Isc = 1 mA, Vmax = 10.4 V, Ca= 2.5 µF, La= 10 mH,
Ci= 0, Li= 0
CSA (Canadian Standards Associa-
tion)
P3S
Intrinsic safe
Class I, Div. 1, Groups A, B, C, D
Class II, Div. 1, Groups E, F, G
Use in accordance with Dräger Control Drawing SE20106.
Power supply: Vmax = 30 V, Imax = 0.3 A, Pmax = 700 mW,
Ci= 5 nF, Li= 50 µH
Signal transmission to central unit
Analogue
— Measured-value signal 4 mA to 20 mA
— Drift below zero point 3.8 mA to 4 mA
— Full-scale value exceeded 20 mA to 20.5 mA
— Unit fault <3.2 mA
— Maintenance signal 3.4 mA ±0.2 mA constant
Power supply
Power supply 12 V DC to 30 V DC
Protection against polarity reversal.
Terminals for 0.5 to 2.5 mm2(20 to 14 AWG).
Physical specifications
Cable inlet M20x1.5, for cable diameter 6 to 12 mm (0.24" to 0.47")
Dimensions (H x W x D) 166 mm x 135 mm x 129 mm (6.54" x 5.31" x 5.08)
Weight approx. 0.9 kg / 2.0 lbs.
Ambient conditions Specifications for the sensor: see sensor data sheet
for operation –40 to 65 oC (–40 to 160oF) 1)
700 to 1300 hPa (20.7 to 38.4 inch Hg)
0 to 100 % relative humidity, non condensing
1) The legibility of the display is restricted at temperatures below –20 oC (–5 oF).
during storage –40 to 70 oC (–40 to 150oF)
700 to 1300 hPa (20.7 to 38.4 inch Hg)
0 to 100 % relative humidity, non condensing
NRTL/C
®
LR97594