Drager Polytron 8700 User manual

WARNING
Strictly follow the Instructions for Use.
The user must fully understand and strictly observe the
instructions. Use the product only for the purposes specified
in the Intended use section of this document.
!
Dräger Polytron 8700/8720
Instructions for Use
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Contents
Dräger Polytron 8700/8720 3
Contents
1 For your safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
1.1 General safety statements . . . . . . . . . . . . . . . . . . . .4
1.2 Definitions of alert icons . . . . . . . . . . . . . . . . . . . . . .4
2 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
2.1 Product overview . . . . . . . . . . . . . . . . . . . . . . . . . . .5
2.2 Functional description . . . . . . . . . . . . . . . . . . . . . . . .6
2.3 Intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
2.4 Intended area and conditions of use . . . . . . . . . . . . .6
2.5 Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
2.6 Device marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
3 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
3.1 General information for the installation . . . . . . . . . . .7
3.2 Restrictions on the installation . . . . . . . . . . . . . . . . .7
3.3 Impedance range of the signal loop . . . . . . . . . . . . .8
3.4 Mechanical installation . . . . . . . . . . . . . . . . . . . . . . .8
3.5 Electrical installation without e-Box . . . . . . . . . . . . . .8
3.6 Electrical installation with e-Box . . . . . . . . . . . . . . .10
3.7 Connecting the device to a Dräger control unit . . . .10
3.8 Connecting the device to a PC . . . . . . . . . . . . . . . .10
3.9 PolySoft 8000 PC software (optional) . . . . . . . . . . .10
3.10 Installing software dongles . . . . . . . . . . . . . . . . . . .10
4 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
4.1 Operating fundamentals . . . . . . . . . . . . . . . . . . . . .11
4.2 Display and LEDs . . . . . . . . . . . . . . . . . . . . . . . . . .11
4.3 Activating the Info mode . . . . . . . . . . . . . . . . . . . . .12
4.4 Switching to the Quick Menu mode . . . . . . . . . . . .13
4.5 Switching to Menu mode (password protected) . . .13
4.6 Measurement mode . . . . . . . . . . . . . . . . . . . . . . . .13
5 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
5.1 Calibrating the device . . . . . . . . . . . . . . . . . . . . . . .14
5.2 Performing Auto Calibration . . . . . . . . . . . . . . . . . .15
6 Menu overview . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
7 Information menu. . . . . . . . . . . . . . . . . . . . . . . . . .17
7.1 Device settings . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
7.2 Sensor information . . . . . . . . . . . . . . . . . . . . . . . . .17
7.3 Datalogger information (only with data dongle) . . .17
8 Settings menu . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
8.1 Switching SIL lock on or off . . . . . . . . . . . . . . . . . . .18
8.2 Device settings . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
8.3 Communication settings . . . . . . . . . . . . . . . . . . . . .21
8.4 Sensor settings . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
8.5 Datalogger settings (only with data dongle) . . . . . .25
9 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . .27
9.1 Fault reference: . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
9.2 Warning reference . . . . . . . . . . . . . . . . . . . . . . . . .28
10 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
10.1 Maintenance intervals . . . . . . . . . . . . . . . . . . . . . . .29
10.2 Changing the sensor . . . . . . . . . . . . . . . . . . . . . . . .29
10.3 Changing the main electronics . . . . . . . . . . . . . . . .29
11 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
12 Substances in the gas library (PIR 7000). . . . . . 30
12.1 Polytron 8700 Type 334 . . . . . . . . . . . . . . . . . . . . 30
12.2 Polytron 8700 Type 340 . . . . . . . . . . . . . . . . . . . . 31
13 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
13.1 Torques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
13.2 Tightening torque and cable size for field wiring termi-
nals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
13.3 Factory settings . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
14 Order list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
14.1 Dräger Polytron 8700 Type 334 . . . . . . . . . . . . . . 34
14.2 Dräger Polytron 8700 Type 340 . . . . . . . . . . . . . . 34
14.3 Dräger Polytron 8720 . . . . . . . . . . . . . . . . . . . . . . 34
14.4 Sensors for remote versions . . . . . . . . . . . . . . . . . 34
14.5 Replacement sensors (except for remote versions) 35
14.6 Accessories for Polytron 8700/8720 . . . . . . . . . . . 35
14.7 Replacement parts . . . . . . . . . . . . . . . . . . . . . . . . 35
15 Declaration of Conformity. . . . . . . . . . . . . . . . . . 36

4Dräger Polytron 8700/8720
For your safety
1 For your safety
1.1 General safety statements
zBefore using the product, carefully read the Instructions
for Use.
zStrictly follow the Instructions for Use. The user must fully
understand and strictly observe the instructions. Use the
product only for the purposes specified in the Intended use
section of this document.
zDo not dispose of the Instructions for Use. Ensure that they
are retained and appropriately used by the product user.
zOnly fully trained and competent users are permitted to use
this product.
zComply with all local and national rules and regulations
associated with this product.
zOnly 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
recommend a Dräger service contract for all maintenance
activities.
zProperly trained service personnel must inspect and
service this product as detailed in the Maintenance section
of this document.
zUse only genuine Dräger spare parts and accessories, or
the proper functioning of the product may be impaired.
zDo not use faulty or incomplete products, and do not modify
the product.
zThe threads for the explosion proof enclosure do not
conform to the minimum/maximum values in EN/IEC
60079-1. The threads must not be reworked by the user.
zThe measuring function of the transmitter for explosion
protection according to Annex II, Clauses 1.5.5, 1.5.6 and
1.5.7 of Directive 94/9/EG is not covered at present.
zOnly operate the product within the framework of a risk-
based alarm signalling concept.
Safe coupling with electrical devices
zElectrical connections to devices which are not listed in
these Instructions for Use should only be made following
consultation with the respective manufacturers or an
expert.
Use in areas subject to explosion hazards
zDevices 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. The devices 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 devices or components.
1.2 Definitions of alert icons
The following alert icons are used in this document to provide
and highlight areas of the associated text that require a greater
awareness by the user. A definition of the meaning of each
icon is as follows:
WARNING
IIndicates an imminently hazardous situation which, if
not avoided, will result in death or serious injury.
CAUTION
Indicates a potentially hazardous situation which, if not
avoided, could result in physical injury, or damage to
the product or environment. It may also be used to
alert against unsafe practices.
NOTICE
Indicates additional information on how to use the
product.
!
!
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Description
Dräger Polytron 8700/8720 5
2 Description
2.1 Product overview
2.1.1 Explosion proof device
1 Housing cover
2 Clip
3 Enclosure with main electronics (and optional relay)
4 Lower part of housing
5 Dräger PIR 7000/7200
6 Assembled device
7 Mounting spacer
2.1.2 Explosion proof device with increased safe wiring
compartment (e-Box)
1 Housing cover
2 Clip
3 Enclosure with main electronics (and optional relay)
4 Lower part of housing
5 Dräger PIR 7000/7200
6 Feed through cable
7e-Box
8 Assembled device
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2
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6Dräger Polytron 8700/8720
Description
2.2 Functional description
The device is operated from a 10 to 30 volt DC supply.
The current gas concentration, status messages and menu
items are shown on a backlit LCD display and by three colored
LEDs. The measured gas concentration is output as a 4 to
20 mA analog signal or a digital HART®signal1After the power
is switched on, the device detects whether the 4-20 mA
interface is to be operated as a current source or a current
sink. The flexible design permits fitting even in places that are
difficult to access. The Dräger PIR 7000/7200 can be fitted on
either side of the of the equipment and installation with up to
30 m between the sensing head and the PIR 7000/7200 is
possible. In the variant with the integrated e-Box with the
"increased safety" protection class, the device can be easily
connected to the electrical field wiring. The device can be
configured, calibrated and serviced without declassification of
the area.
2.3 Intended use
The Dräger Polytron 87x0 is an explosion proof transmitter for
continuous monitoring of the concentration of gases and vapors
containing hydrocarbons or carbon dioxide. The housing for the
device consists of robust, non-corroding stainless steel or
aluminum and is suitable for indoor or outdoor applications.
The unit can be connected to a Dräger monitoring system or
a programmable logic controller (PLC) by means of a sealed
conduit or an appropriately approved cable gland. With the
optionally integrated relay module, the device can be operated
without a central controller (with additional local alarm
signalling). The device is designed for fixed installation and is
approved for use in potentially explosive atmospheres,
see chapter 2.5 on page 6.
2.3.1 Dräger Polytron 8700 with PIR 7000 infrared gas
sensor Types 334 and 340
For monitoring flammable gases and vapors containing
hydrocarbons
zMeasuring range of Type 334 (IDS 01x1): 0 to 20 up to
100 %LEL2, for CH4(methane) also 0 to 100 vol.%
zMeasuring range of Type 340 (IDS 01x2): 0 to 5 up to
100 %LEL2
2.3.2 Dräger Polytron 8720 with PIR 7200 infrared gas
sensor Type CO2
For monitoring carbon dioxide.
zMeasuring range (IDS 01x5): 0 to 0.2 up to 30 vol% CO2
2.4 Intended area and conditions of use
Hazardous areas classified by zones:
The device is only designed for use in Zone 1 or Zone 2
potentially explosive atmospheres for which a temperature
range as specified on the device must be observed and in which
gases of Explosion Groups IIA, IIB or IIC and Temperature
Classes T4 or T6 (depending on maximum ambient
temperature) or dust of Groups IIIA, IIIB or IIIC may occur.
Hazardous areas classified by divisions:
The device is only designed for use in potentially explosive
atmospheres of Classes I&II, Div. 1 or 2, for which
a temperature range as specified on the device must be
observed and in which gases or dust of Groups A, B, C, D or
E, F, G and Temperature Classes T4 or T6 (depending on
maximum ambient temperature) may occur.
2.5 Approvals
See printed version for approval markings.
2.6 Device marking
The device marking is reproduced on a separate document
shipped with the device.
Key to the Serial Number: The third letter of the Serial Number
specifies the year of manufacture: A = 2009, B = 2010, C = 2011,
D = 2012, E = 2013, F = 2014, H = 2015, J = 2016, K = 2017 etc.
Example: Serial Number ARBH-0054: The third letter is B,
i.e. the device was manufactured in 2010.
1HART
®is a registered trademark of HCF, Austin, Texas, USA
WARNING
To prevent ignition of explosive atmospheres, strictly
follow the warnings below:
Not tested in oxygen enriched atmospheres (>21%
O2). High off-scale readings may indicate an explosive
concentration.
Exchanging components may compromise the intrinsic
safety. This only applies if the device is intrinsically
safe.
2 Lower Explosive Limit depending on the substance and the locally
applicable regulations.
!
WARNING
Explosive. Not to be used in oxygen enriched
atmospheres. None of the Polytron 8000 transmitters
is certified and approved to be operated in oxygen
enriched atmospheres.
!
DPolytron 8700
ITR 0421
Dräger Safety 23560 Lübeck, Germany
II 2G
II 2D
WARNING: Do not open when energized
I
S
F
S
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E
A
D
L
C
9N54
0158
Class I, Div 1, Groups A,B,C,D | Class II, Div 1, Groups E,F,G
Class I, Zone 1, Group IIC | T-Code T6/T4 | Type 4X | C22.2 No. 152
Supply: 10...30 VDC, 0.1...0.75 A | Relays: 5 A, 30 VDC or 230 VAC
CAUTION: Do not open cover. Opening
cover with circuits alive provokes risk of
Ignition of Hazardous Atmospheres.
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.
Gas Detector for Use in Hazardous Locations as to
Fire, Electrical Shock and Explosion Hazards only
Part No: 4544638
Serial No. XXXX-9999
Ex d IIC T6/T4 Gb
Ex tb IIIC T80/130°C Db
-40°C ≤ Ta ≤ +40/+80°C
PTB 11 ATEX 1005X
IECEx PTB 11.0005X
IP6x | P ≤ 5 W
Sample

Installation
Dräger Polytron 8700/8720 7
3 Installation
3.1 General information for the installation
The selection of a suitable mounting location is crucial for the
effectiveness and performance of the entire system.
Considerable thought must be given to every detail of
installation, particularly:
zthe local and national rules and regulations for the
installation of gas monitoring systems,
zthe applicable regulations for running and connecting
power and signal cables to gas monitoring systems,
zthe full extent of environmental influences to which the
device will be subjected,
zthe physical properties of the gases and vapors to be
measured,
zthe details of the particular application (e.g., potential
leaks, air movements/flows, etc.),
zaccessibility for required maintenance activities,
zthe geometric of the accessories that are used with
the system,
zall other limiting factors and stipulations that may affect the
installation of the system.
zFor installation without a conduit, an approved cable gland
(e.g. Hawke A501/421/A/¾" NPT or equivalent) must be
used (see chapter 13 on page 32). To increase the RF
interference immunity, it may be necessary to connect the
cable screen to the cable gland and to the control unit.
zThe explosion proof enclosure has three ¾" NPT
connections, which can be used for field wiring, the direct
attachment of a sensor or wiring an external sensor. For the
correct tightening torques for cable bushings, plugs and
sensors, see chapter 13 on page 32.
zThe secondary are supposed to be supplied from an
isolating source (does not apply to relay contacts).
zThe optional e-Box has up to four 20 mm connections,
which can be used for field wiring or wiring an external
sensor. The permissible cable diameter is 7 to 12 mm.
zIf the device is installed in locations where ambient
temperatures of over 55 °C prevail, appropriate cables
which are designed for use at temperatures of 25 °C above
the maximum ambient temperature must be used.
zStrip back the insulation on conductors by 5 to 7 mm.
zConnect the cable as shown in Chapter 3.5 on page 8
(shown here also with protective ground).
zThe use of a mounting spacer (Order Number 68 12 617)
is recommended as a matter of principle if the device is to
be mounted on a wall or on a very uneven substrate.
zThe connecting wires for the optional relay module must be
selected and fused according to the rated voltages,
currents and environmental conditions.
zWhen stranded conductors are used, an end ferrule must
also be used.
3.2 Restrictions on the installation
zThe device requires a DC voltage between 10 and 30 V.
The minimum supply voltage of 10 V and the cross-section
of the conductors used determine the distance of the
device from the supply or the central controller
(see chapter 13 on page 32). The device is designed for
cables of sizes 12 to 24 AWG (0.2 to 2.5 mm2). A three-
wire, screened cable must be used as a minimum.
zThe device must not be subjected to any radiant heat
(e.g. direct sunlight) as this may result in a temperature rise
above the specified thresholds (see chapter 13 on
page 32). The use of a reflective screen is recommended.
zIf a splash guard (Order Number 68 11 911 or 68 11 912) is
used, it is essential to make sure that the LEDs on the
status display are aligned vertically and the "Dräger" logo
on the splash guard is aligned horizontally. A maximum
deviation of ±10 degrees from the horizontal position is
permissible. Greater deviations will increase the response
time (see Instructions for Use for the PIR 7000/7200).
zObserve the preferred position: The PIR 7000/7200 must
be aligned so that the lights on the status display are above
one another. At the same time, the "Dräger" lettering on the
splash guard must read horizontally. A deviation from the
horizontal of ±10° maximum is permissible.
zAny other alignment is only permissible if the PIR 7000/
7200 is used without a splash guard, e.g. applications in
exhaust ducts. When the sensor is fitted in an exhaust duct,
there is an increased risk that residues will form on the
optical surfaces.
zThe housing is weather resistant and suitable for outdoor
applications. The use of the optional splash guard is
recommended to protect the sensor from water and dust.
zThe device must be installed and operated in an
environment which conforms to the stated specifications
(see chapter 13 on page 32).
zTo insure proper operation of the device, the impedance of
the 4 to 20 mA signal loop must not exceed 500 ohms.
Depending on the operating voltage and according to the
application (e.g. HART operation), certain minimum
impedances must be adhered to (see chapter 3.3 on
page 8). The conductors for the power supply must have
an adequately low resistance to insure the correct supply
voltage at the device.
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8Dräger Polytron 8700/8720
Installation
3.3 Impedance range of the signal loop
Devices with a HART interface can be operated with HART
communication or in HART Multidrop mode.
3.4 Mechanical installation
zUse the supplied drilling template for mounting on a wall.
zThe mounting surface should be even and free of
sharp edges.
zDräger recommends using M6 Allen bolts.
zTake care that the conditions at the mounting location do
not result in the gas feed openings of the PIR 7000/7200
being covered or obstructed.
zThe openings must be readily accessible to the
surrounding atmosphere.
3.5 Electrical installation without e-Box
Connection diagram for operation as a current source
Connection diagram for operation as a current sink
NOTICE
A dust cap can be fitted to the cable entry of the device.
This cap is only used for transport purposes and must
be removed before the device is connected to a sealed
conduit.
Operating mode Impedance range of the
signal loop Supply voltage range
Operation
without HART
communication
0 to 230 Ωat 10 V DC
Rising linearly with the
supply voltage from:
0 to 230 Ωat 10 V to
0 to 500 Ωat 16 V
10 to 18 V DC
0 to 500 Ω18 to 30 V DC
Operation with
HART
communication
(HART mode)
230 to 270 Ωat 13 V DC
Rising linearly with the
supply voltage from:
230 to 270 Ωat 11 V to
230 to 500 Ωat 16 V
11 to 16 V DC
230 to 500 Ω18 to 30 V DC
HART Multidrop
operation 230 to 500 Ω10 to 30 V DC
NOTICE
There must be a free space of 5 cm next to the
PIR 7000/7200 to permit fitting/removal of the splash
guard and the later fitting of accessories.
To ensure an adequate distance between the
PIR 7000/7200 and the wall, use the mounting
spacer (Order Number 68 12 617).
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CAUTION
First connect the cables for the relays and make
the connections to the sensor before connecting the
device to the power supply.
!
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mA

Installation
Dräger Polytron 8700/8720 9
3.5.1 Power and signal cables
1. Release the retaining
screw (1) and unscrew the
housing cover from the
device.
2. Lift the handle and remove
the enclosure with the main
electronics.
3. Connect the device
electrically to ground.
4. Rotate the main electronics
and disconnect the 5-way
plug.
5. Connect the three cables for
the power supply and the
signal to the corresponding
terminals (see following
table of connections for the 5-way plug).
Connections for 5-way plug (power supply and signal):
6. For operation without a central controller: connect
Terminal 3 to Terminal 4.
7. Fit the plug back in the socket and tighten the screws.
8. The screen of the cable must only be connected to the
control unit.
9. Insert the main electronics back in the housing.
10. Screw the cover on again and tighten the retaining screw.
3.5.2 Version with relays
When the relay module is fitted, the wires for the alarm device
are connected to the 9-way plug.
1. Disconnect the 9-way plug on the rear of the main
electronics.
2. Connect the wires for Alarm Relay 1, Alarm Relay 2 and the
Fault relay to the corresponding terminals, (see following
table of connections for the 9-way plug).
3. The relays are energized when the default settings are used
and in the measurement mode. This insures "fail-safe"
operation. The terminal assignments in the connection table
below apply when the default settings are used and in
measuring mode (see chapter 4.6 on page 13).
4. Fit the plug back in the socket and tighten the screws.
5. Fit the enclosed protective cover over the plug and secure
it with cable ties if necessary.
Connections for 9-way plug (relays):
(NO = Normally open, NC = Normally closed, C = Common)
3.5.3 Remote sensor
The remote junction box (Order Number 45 44 098 for
stainless steel / Order Number 45 44 099 for aluminum)
permits the installation of the sensors remote from the device
electronics. This installation enables operation of the device in
difficult to access or unfavourable positions (see the
Instructions for Use for the Dräger Polytron 5000 Junction Box
in this respect). The maximum permissible distance between
the Polytron 87X0 and the PIR 7000/7200 is 30 m.
5-way plug (power supply and signal)
Terminal 1 2 3 4 5
Ident. PWR+ PWR- PWR- 4 to 20 mA signal PE
Function V+ V- V- 4 to 20 mA signal
(Operation as
source or sink)
PE
WARNING
At voltages >30 V AC or >42.4 V DC, the relay cables
must be enclosed in protective tubing, or double-
insulated cables must be used.
00933300.eps
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!
NOTICE
For clear and far-ranging detection of a device fault,
an alarm device should be switched by the fault relay.
9-way plug (relays)
Fault relay A2 relay A1 relay
Terminal123456789
Ident. FLT
NO FLT CFLT NC A2 NO A2 CA2 NC A1 NO A1 CA1 NC
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10 Dräger Polytron 8700/8720
Installation
3.6 Electrical installation with e-Box
zInstall the e-Box in accordance with the Installation
Instructions for the Polytron 5000/8000 e-Box.
3.7 Connecting the device to a Dräger
control unit
Electrical connections to the control unit
zConnect the screen for the wires to the grounding point in
the control unit (e.g., chassis, grounding rail).
3.8 Connecting the device to a PC
The separately available Polytron 5000/8000 IR connection kit
is intended for use with the Polytron 5000/8000 and enables
communication between the Polytron 5000/8000 and a PC.
3.9 PolySoft 8000 PC software (optional)
The PolySoft 8000 PC software is used to display device
information, edit configuration settings and read out from the
measurements memory.
3.10 Installing software dongles
The following SW dongles are available for the device:
To install a SW dongle:
1. Switch off the power to the unit or declassify the area
according to the local regulations.
2. Release the retaining screw and unscrew the housing
cover from the device.
3. Lift the handle and remove the enclosure with the main
electronics.
4. Insert the dongle in the slot with the Dräger lettering facing
upwards.
5. Insert the main electronics back in the housing.
6. Screw the cover on again and tighten the retaining screw.
The dongle is installed.
7. Switch on the power.
NOTICE
The e-Box can be pre-installed, wired and closed off
with the supplied cover. As soon as the installation is
ready for commissioning, the device is connected to
the e-Box and put into operation. This prevents the
device from being damaged during the construction
phase.
NOTICE
Information on connection can be found in the
Instructions for Use accompanying the particular
Dräger control unit (e.g. Regard, QuadGard).
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Datalogger dongle
83 17 618
Enables the datalogger and the
graphic display of concentrations.
Sensor test dongle
83 17 619
Enables the sensor self test
(for certain versions only)
Diagnostic dongle
83 17 860
Enables the sensor self test,
the display of the remaining
sensor activity and the sensor
diagnostic function
(for certain functions only)
Combi-dongle (datalogger and sensor test dongle)
83 23 218
Combi-dongle (datalogger and diagnostic dongle)
83 23 219
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Operation
Dräger Polytron 8700/8720 11
4 Operation
4.1 Operating fundamentals
4.1.1 Menu navigation
It is possible to scroll throught he menu items by tapping the
and symbols with the magnetic wand (Part Number
4544101, blue). confirms a function.
Graphic symbols facilitate navigation in the various menus.
4.1.2 Changing parameter values or the parameter status
1. Select the desired menu item with and .
2. Confirm the menu item with .
The current value or status will be displayed.
3. Using and , the value of a numerical parameter can
be changed or preset values can be selected.
4. As soon as the desired value or the selection is displayed,
tap to validate/confirm the new parameter.
5. Tap to access the next higher level.
zIf exiting using Back to menu or Previous, all changes will
be discarded.
4.1.3 Exiting menus
zTap Back to measurement and to exit the menu.
4.2 Display and LEDs
In measurement mode, the current gas concentration,
the name of the gas and the measurement units are shown on
the display. The green LED lights.
In addition, the following symbols may be displayed:
z"", if the measurement range is exceeded
z" - - - - " and " X" in the event of a malfunction. The yellow
LED lights, (see chapter 4.2.2 on page 12).
z"SIL", when SIL status is activated.
When the optional relay PCB is used:
zIf the first alarm has been triggered, the red LED gives
single flashes.
zIf the second alarm has been triggered, the red LED gives
double flashes.
NOTICE
The housing cover should be fitted when using the
magnetic wand. If the housing cover is not fitted,
the magnetic wand might activate two or more buttons
at the same time (crosstalk).
Together with the text » Back «, » Menu «, etc., exit the
menu or go back 1 step.
Closed folder
Further functions or sub-menus are located under
this item.
Opened folder
The functions and sub-menus available here are listed
under this item.
Function
When activated, functions can be executed in one or
more steps.
Selection activated
For functions that can be selected and activated,
the activation is initiated by pressing » «.
List closed above / complete
There are no further functions, menus or sub-menus
listed above.
List can be scrolled upwards
There are further functions, menus or sub-menus
listed above.
00733300.eps
M
OK
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OK
List closed below / complete
There are no further functions, menus or sub-menus
listed below.
List can be scrolled downwards
There are further functions, menus or sub-menus
listed below.
Next
Perform context-related action.
Number / total number of steps (screens) within
the function.
Entry
Enter data with » « and » «.
3/3
2/2
M
M
OK
M
OK
OK
OK

12 Dräger Polytron 8700/8720
Operation
4.2.1 Special symbols
The following special symbols, which indicate the device state,
may be displayed on the right hand side in measurement
mode.
4.2.2 LED symbols
When the optional relay PCB is used:
zIf the first alarm has been triggered, the red LED gives
single flashes. A1 relay is activated.
zIf the second alarm has been triggered, the red LED gives
double flashes. A2 relay is activated.
zIf an alarm can be acknowledged and is acknowledged,
the LED stops flashing and lights continuously instead until
the alarm condition is no longer present. The corresponding
relay is deactivated.
4.3 Activating the Info mode
The Info mode is used to present information about the central
device settings and states.
zTap and hold for 3 seconds.
The device information appears on several displays.
No changes can be made.
zTap or briefly to switch between the displays.
zThe Info mode can be ended at any time by selecting .
zIf no button is selected within 30 seconds, the device
reverts automatically to the measurement mode.
Example of the Info mode
(Displays vary depending on sensor):
1. Display - Device information:
zDate and Time
zSoftware version
zPart number of the device
zSerial number of the device
zDevice code
2. Display - Sensor information:
zSensor description
zPart number of sensor
zSerial number of the sensor
zSoftware version
zSoftware revision
3. Display - Sensor configuration:
zGas description
zMaximum measurement limit and measurement units for
the sensor
zMeasurement range and measurement units for the analog
interface. Only displayed when the 4-20 mA interface is
enabled.
Warning message present – to display warnings,
see chapter 7.1.1 on page 17.
Information can be called up in Info mode, see chapter 4.3
on page 12.
Error message present – to display the error,
see chapter 7.1.2 on page 17
Maintenance signal will be output on the interface,
see chapter 8.3.2 on page 21.
Measurement range of analog interface exceeded
Measurement less than range of analog interface
Analog interface is set to a fixed value (e.g. Multidrop HART
communication) and is not transmitting any measurements.
"Preventive" maintenance: The sensor is ready for operation.
"Preventive" maintenance: The sensor is ready for operation
but is close to the end of its life cycle.
"Preventive" maintenance: The sensor is still ready for
operation but should be changed as soon as possible.
The datalogger is active in rolling mode.
To activate/deactivate, see chapter 8.5.2 on page 25.
The datalogger is active in stacking mode.
To activate/deactivate, see chapter 8.5.2 on page 25.
SIL SIL is activated (observe Safety Manual - Order Number
9033307).
Symbol LED Description
red Alarm triggered
yellow Malfunction / Warning
green Switched on
Measurement mode
NOTICE
The alarm triggering function is only available when
the optionally integrated relay module is used.
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A001.eps
07.11.2003 12:34
SW Version
: 1
Part No.
: 8317778
Serial No.
: ARUA0001
DeviceCode: 00006317
Instrument Info
1/3
A002.eps
2/3
Sensorname: O 2
Part No. : 6809630
Serial No.
: XXXXXXX
EEPROM Typ
: 1
EEPROM Vers.: 1
Sensor Info
A003.eps
3/3
Gasname : O 2
Range : 25.00 Vo
4–20 SP : 25.00 Vo
Alarm A1 : 19.00 Vo
Alarm A2 : 23.00 Vo
Sensor Config.

Operation
Dräger Polytron 8700/8720 13
zA1 Alarm limit and measurement units1
zA2 Alarm limit and measurement units1
4.4 Switching to the Quick Menu mode
zTap and hold for 1 to 2 seconds.
The Quick Menu will open. This menu is displayed without
any password request. No changes can be made.
The selected information about status and device settings
can be retrieved (e.g. warning messages, error messages,
installed modules and calibration data).
4.5 Switching to Menu mode
(password protected)
1. Tap and hold for longer than 3 seconds.
The password request will be displayed.
2. Enter the password and confirm.
The screen for password entry will be displayed.
3. Set the password and confirm the entry.
The menu hierarchy corresponding to the entered password
will open.
zAn error message will be displayed if the entered password
is invalid.
Password presets:
Password for the Calibration menu: _ _ _ 1
Password for the Settings menu: _ _ _ 2
4.6 Measurement mode
zSwitch on the power.
{The device runs through a start-up sequence (LCD test
by inverting the video, LED test, software version and
initialization) and starts the warm-up phase. The display
indicates that the sensor is ready to start in hh:mm:ss
(the countdown begins) and the Polytron 87X0 sends
the Maintenance signal.
{After the warm-up phase, the device passes into the
measurement mode.
{The current gas concentration, the selected gas and
the units of measure appear on the display.
{The LED lights green.
4.6.1 Analog signals
In measurement mode the output current of the device is
between 4 and 20 mA and is proportional to the measured gas
concentration.
The device uses various current values to indicate different
operating modes. This conforms to the NAMUR NE43
recommendation. The 4-20 mA interface on the device can be
customized and configured to individual requirements.
The device is provided with suitable standard settings at the
factory (see chapter 13.3 on page 33).
1 Only displayed when relay is configured.
WARNING
The configuration and calibration settings must be
checked before the device is operated in measurement
mode.
NOTICE
The correct date and time settings are important for
many functions (see chapter 8.2.3 on page 20).
M
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14 Dräger Polytron 8700/8720
Calibration
5 Calibration
Repeat the calibration of the device at regular intervals as
specified in the particular sensor data sheet.
5.1 Calibrating the device
1. Connect the pressure reducer to the calibration gas cylinder.
2. Attach the calibration adapter to the sensor.
3. The gas flow should be between 0.5 and 2.0 l/min.
4. Connect the hose to the calibration adapter.
1 Test gas cylinder
2 Pressure reducer
3Hose
4 Calibration adapter
5.1.1 Zero point calibration
1. Select Calibration > Zero Calibration and confirm.
The Maintenance signal is transmitted.
The message Apply zero gas is displayed.
2. Connect zero gas (synthetic air or nitrogen) to the sensor.
3. Select Next and confirm.
The current value is displayed.
After the displayed value is stable:
4. Select Calibrate and confirm.
The message Please wait… is displayed.
The actual value is displayed.
CAUTION
Danger to health! Do not inhale the test gas. Observe
the hazard information in the corresponding safety
data sheets. Provide venting into a fume cupboard or
outside the building.
Always calibrate the zero point first before the
sensitivity. Otherwise the calibration will be faulty!
NOTICE
Calibration is not possible if the date and time are not
set (see chapter 8.2.3 on page 20).
NOTICE
To perform a zero point or span calibration of the
Polytron 87X0 with a PIR 7000/7200, the PIR 7000/
7200 must be adequately warmed up. Dräger
recommends performing a calibration no sooner
than 3 hours after the device is switched on. For
a calibration, use the splash guard (Order Number:
68 11 911/68 11 912) and the calibration adapter
(Order Number: 68 11 610) (does not apply for duct
mounting or when the process cuvette / process
adapter is used) Observe the installation instructions
for the PIR 7000/7200 accessories.
!
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NOTICE
Ambient air can also be used instead of nitrogen or
synthetic air to zero the sensor, provided it is insured
that the ambient air contains no measured gas or any
other gas for which the sensor may exhibit cross-
sensitivity (see the details in the sensor data sheet).
In this case, neither a gas cylinder nor a calibration
adapter is required for the zero point calibration.
For the Polytron 8720 (with PIR 7200 to detect carbon
dioxide), only nitrogen or synthetic air without any CO2
content may be used for a zero point calibration.
00433300.eps
2
1
4
3PIR 7000
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Calibration
Dräger Polytron 8700/8720 15
zActual value within the permissible range:
{Select Next and confirm.
{Shut off the test gas and remove the calibration adapter
from the PIR 7000/7200.
zActual value outside the permissible range:
{Select Next and confirm.
{Wait until the measurement is stable.
5.1.2 Span calibration
1. Select Calibration > Span calibration and confirm.
The Maintenance signal is transmitted.
The values for the calibration gas are displayed, e.g.:
All three paramrters can be changed:
zSelect Gas and confirm.
{Select the desired calibration gas from the list and
confirm.
zSelect Unit and confirm.
{Select the desired unit from the list and confirm.
zSelect Conc. and confirm.
{Set the desired concentration of the calibration gas.
When the settings are correct:
2. Select Next and confirm.
A message such as, e.g. Gas flow to METHANE
is displayed.
3. Connect the calibration gas to the sensor.
4. Select Next and confirm.
The current value is displayed.
After the displayed value is stable:
5. Select Next and confirm.
The message Please wait… is displayed.
The actual value is displayed.
zActual value within the permissible range:
{Select Next and confirm.
{Shut off the test gas and remove the calibration adapter
from the PIR 7000/7200.
zActual value outside the permissible range:
{Select Next and confirm.
{Wait until the measurement is stable.
zA calibration can be aborted at any time.
5.2 Performing Auto Calibration
The device offers the option of an automatically sequenced
calibration. This reduces the number of otherwise manual
interactions with the device. The auto calibration is only
suitable for experienced users, as calibration errors can occur
here as a result of tightened procedures.
1. Select Settings > Sensor > Autocal. set. to enable or
disable the function.
2. Supply fresh air or feed nitrogen or compressed air at
a flow rate of 0.5 - 2.0 L/min to the sensor.
3. Select Calibration > Auto cal. and confirm.
{Please wait... is displayed and a calibration of the zero
point is performed automatically.
{After a successful zero point calibration, the span
calibration is started.
{The calibration gas concentration, the units and, where
appropriate, the calibration gas are displayed and can
be changed.
4. Start the calibration with Next; Back to menu aborts the
calibration.
5. Feed the relevant calibration gas to the sensor at a flow
rate of 0.5 - 2.0 L/min.
{When the measured value is stable, the device performs
the calibration automatically.
{After a successful calibration, the measurement and
the message Value OK? are displayed.
6. When the measurement is stable, shut off the calibration
gas and wait until the measurement is below any possible
alarm thresholds again.
zThe calibration is performed again with Redo.
zComplete the calibration with Accept value.
The device returns to the measurement mode.
Gas Methane
Unit %LEL
Conc. 50.0
NOTICE
Not all of the available sensors and gases support auto
calibration. If the function is not available, a manual
calibration must be performed.
WARNING
It must be insured that during the zero point calibration,
no measured gas is present in the supplied calibration
gas. Particularly with a fresh air calibration, Dräger
recommends performing a second, independent
measurement. Some sensors may only be calibrated
with synthetic air or nitrogen (observe the relevant
sensor data sheets).
NOTICE
After 10 minutes without confirmation, the device
reverts to measurement mode without performing
a calibration.
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16 Dräger Polytron 8700/8720
Menu overview
6 Menu overview
◄Back to
measure
Information page 17 Instrument page 17 Warnings page 17
Sensor page 17 Faults page 17
Calibration page 14 Data logger page 17 Device codes page 17
Modules page 17
Settings page 18
Last cal. date page 17
Zero calibration page 14 Next cal. date page 17
Span calibration page 15
Auto CAL page 15 Logger status page 17
Graph page 17
SIL activation page 18
Instrument page 18 Alarm page 18 Alarm on/off page 18
Communication page 21 Passwords page 20 Relay A1 page 18
Sensor page 24 Date and time page 20 Relay A2 page 18
Data logger Language page 20 Alarm A1 page 18
Function key page 20 Alarm A2 page 19
Device init page 20 Set alarm A1 page 19
Datalogr. on/off SW dongle page 20 Set alarm A2 page 19
Set Datalogger Display page 20 Set fault page 19
Clear datalogr
Calibration PWD page 20
Sample time Settings PWD page 20
Peak/Average
Trigger on/off Display contrast page 20
Trigger value Operating mode page 20
Stack/Roll Display test page 21
HART interface page 21
Analog interface page 21 Polling address page 21
Profibus address page 23 Unique identifier page 21
Tag page 21
Auto CAL page 24 Dräger REGARD page 21
Sensortest page 24
Sensor lock page 23 Fault current page 21
Sensor type page 23 Warning page 21
Gas settings page 23 Warning interval page 21
Reset sensor
required!
page 23 Warning current page 22
Cal. interval page 23 Maintenance signal page 22
Set Sensortest page 23 Maintenance current page 22
Fast response page 23 Beamblock on/off page 22
Beambl. current page 22
Analog offset page 22
Set current page 23
Set concentr. page 23
Set fault page 23
Set warning page 23
Set mainten. page 23
Set beamblock page 23

Information menu
Dräger Polytron 8700/8720 17
7 Information menu
Specific data about the device, the sensor used and the
measured gas are summarized in this menu. The menu can be
accessed without a password. Changes to the data are not
possible.
7.1 Device settings
7.1.1 Displaying warning messages
To display warnings in plain text with warning numbers,
see chapter 9 on page 27.
The symbol is displayed when there is a warning present.
zSelect Information > Instrument > Warnings and confirm.
Warnings are displayed in plain text.
If several warnings are present, this is indicated in the upper
right-hand corner of the display, e.g., 1/3 = Screen 1 of 3.
7.1.2 displaying fault messages
To display faults present in plain text with fault numbers,
see chapter 9 on page 27.
The symbol is displayed when there is a fault present.
zSelect Information > Instrument > Faults and confirm.
Faults are displayed in plain text.
If several faults are present, this is indicated in the upper
right-hand corner of the display, e.g., 1/2 = Screen 1 of 2.
7.1.3 Displaying device codes
Display of codes for faults/warnings in a numerical table
(hexadecimal).
The symbol is displayed when there is a fault present.
zSelect Information > Instrument > Device codes and
confirm.
Faults are displayed as a hexadecimal numerical code in
tabular form. If all the numerical groups are displayed as 00,
there are no faults or warnings present.
7.1.4 Displaying installed modules
Display of the installed hardware modules.
zSelect Information > Instrument > Modules and confirm.
A list of all possible modules is displayed. The installed
modules are identified by a , those not installed by a .
zMark a module and request detailed information with .
7.2 Sensor information
This menu contains the functions for retrieving the calibration
data.
7.2.1 Display last calibration date
Display the date of the last calibration.
zSelect Information > Sensor > Last cal. date and confirm.
The date of the last calibration is displayed
7.2.2 Display next calibration date
Display the date of the next calibration.
zSelect Information > Sensor > Next cal. date and confirm.
The date when the next calibration of the sensor is due is
displayed.
7.3 Datalogger information (only with
data dongle)
This menu contains the functions for querying the datalogger.
7.3.1 Displaying the datalogger status
zSelect Information > Datalogger > Logger status
and confirm.
The current status of the datalogger is displayed: Datalogr. :
on or off (datalogger on or off)
zTo switch the datalogger on/off, see chapter 8.5.1 on
page 25.
7.3.2 Displaying a graph of measured values
Show the measurements from the sensor on a 15-minute
time axis.
zSelect Information > Datalogger > Graph and confirm.
NOTICE
The fault code is very helpful for technical support and
should always be stated in full in the event of a fault.
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18 Dräger Polytron 8700/8720
Settings menu
8 Settings menu
This menu contains all the functions that are required for the
individual configuration of the device.
8.1 Switching SIL lock on or off
With this function, the device can be protected against
unauthorized changes to the configuration with a password.
Changing the configuration (e.g., changing the measurement
range from 100 %LEL to 50 %LEL) will cause the device to
display all the safety-relevant parameters to the user once
more before it returns to the measurement mode. The
correctness of the parameters and settings must be confirmed.
1. Select Settings > Instrument > Set SIL.
2. Select the desired state On or Off and confirm.
8.2 Device settings
8.2.1 Alarm settings (only with installed relay module)
Alarms issued via relays and LEDs.
Switching the alarm on or off
1. Select Settings > Instrument > Alarm > Alarm on/off.
2. Select the desired state On or Off and confirm.
Configuring Relay A1 or A2
This function is used to define whether the alarm relay is
energized in standard operation or in an alarm state. If the
configuration of the relay is set to "Normally energized", the
corresponding relay contact is closed in the normal case and
drops out in the event of an alarm. This configuration results in
an alarm being triggered in the event of a loss of power to the
transmitter (fail-safe). The fault relay is factory-configured to
"Normally energized" and cannot be changed.
1. Select Settings > Instrument > Alarm > Relay A1 or
Relay A2 and confirm.
2. Select Normal energy supply oder Energy supply
during alarm and confirm.
Configuring Alarm A1 or A2
1. Select Settings > Instrument > Alarm > Alarm A1 or
Alarm A2 and confirm.
2. Select the line for entering the alarm limit and confirm.
3. Set the threshold and confirm.
The setting for the alarm threshold is displayed.
4. Select Next and confirm.
The setting for the alarm direction is displayed.
5. Select Rising or Falling and confirm.
6. Select Next and confirm.
The setting for the alarm direction is displayed.
7. Select Latching or Non Latching and confirm.
8. Select Next and confirm.
The setting for the acknowledgement is displayed.
9. Select Acknowledgeable or NonAcknowledgeabl or
PreAcknowledgeabl and confirm.
10. Select Next and confirm.
The functional relationship between the various settings is
explained in the following table:
NOTICE
SIL lock is only available for certain sensors (see also
the sensor data sheets or the Dräger Polytron 8X00
Safety Manual).
NOTICE
When SIL is activated, the device displays all the
important parameters and setting before returning to
measurement mode. Check the parameters and
settings carefully and confirm.
CAUTION
In the normal state, the relays in the relay module are
energized. That is, the relays change their state if the
power supply is interrupted!
CAUTION
If the alarm is inactive, the alarm state will not be
issued by the LEDs or the relay interface! A warning
message will be shown on the display!
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!
Latching and
acknowledgeable
The alarm must be acknowledged
manually. The alarm can be
acknowledged when the alarm
condition is still present.
Latching and not
acknowledgeable
The alarm must be acknowledged
manually. The alarm can only be
acknowledged when the alarm
condition is no longer present.
Latching and pre-
acknowledgeable
The alarm must be acknowledged
manually. The alarm can be
acknowledged when the alarm
condition is still present but will only
be reset when the alarm condition is
no longer present.
Non-latching and
acknowledgeable
The alarm is acknowledged
automatically when there is no longer
any alarm condition present, or it can
be acknowledged manually.
Non-latching and not
acknowledgeable
The alarm is acknowledged
automatically when there is no longer
any alarm condition present.
The alarm cannot be acknowledged
manually.
Non-latching and pre-
acknowledgeable
Corresponds to the alarm behavior
for "Non-latching" and "Not
acknowledgeable".

Settings menu
Dräger Polytron 8700/8720 19
Overview of standard alarm settings (for Polytron 8700
with PIR 7000, configured for methane, full scale reading
of 100 %LEL)
The function for setting the A1 hysteresis is opened.
This function permits the setting of a zone within which
a triggered relay maintains its status until the gas concentration
is outside the zone. This function prevents relays from
chattering at an alarm threshold.
Example: A2 at 40 %LEL methane
Maximum possible hysteresis: 3 %LEL
Alarm activation at measured values ≥40 %LEL
Alarm deactivation at measured values ≤37 %LEL (40 %LEL -
3 %LEL)
11. Select the line for entering the hysteresis and confirm.
12. Set the hysteresis for A1 and confirm.
The hysteresis setting for A1 is displayed.
13. Select Next and confirm.
The settings for A1 are displayed.
14. Select and confirm with Confirm.
The settings for the A1 alarm are now complete.
Testing Alarm A1
This function simulates the A1 alarm status.
1. Select Settings > Instrument > Alarm > Set Alarm A1
and confirm.
2. Select On or Off and confirm.
When the function is activated, the relay and the interface are
set to the A1 alarm status and the red LED gives single flashes.
Testing Alarm A2
This function simulates the A2 alarm status.
1. Select Settings > Instrument > Alarm > Set Alarm A2
and confirm.
2. Select On or Off and confirm.
When the function is activated, the relay and the interface are
set to the A2 alarm status and the red LED gives double flashes.
Testing Fault status
This function simulates the Fault alarm.
1. Select Settings > Instrument > Alarm > Set fault
and confirm.
2. Select On or Off and confirm.
When the function is activated, the Fault relay and the 4-20 mA
interface are set to the fault current and the yellow LED lights.
A1/Relay 1 A2/Relay 2
Alarm threshold 20 %LEL 40 %LEL
Hysteresis 0 %LEL 0 %LEL
Relay Normally
energized
Normally
energized
Relay alarm:
Direction
Rising Rising
Latching mode Non-latching Latching
Acknowledgement
mode
Acknowledgeable Not
acknowledgeable
NOTICE
When the function Set Alarm A1 is exited in the menu,
the Polytron 87X0 reverts automatically to measurement
mode.
NOTICE
When the function Set Alarm A2 is exited in the menu,
the Polytron 87X0 reverts automatically to measurement
mode.
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NOTICE
When the function Set fault is exited in the menu,
the Polytron 87X0 reverts automatically to measurement
mode.
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20 Dräger Polytron 8700/8720
Settings menu
8.2.2 Changing passwords
The passwords for calibration (zero and span calibrations) and
for the settings (full configuration) can be defined in this menu.
1. Select Settings > Instrument > Passwords > Calibration/
Settings PWD and confirm.
2. Select the line for the password settings and confirm.
3. Set the password and confirm.
The setting for the password is displayed.
4. Select Confirm and confirm.
8.2.3 Setting the date and time
1. Select Settings > Instrument > Date and time and confirm.
2. Select the desired line and confirm in order to switch to the
Change mode.
3. Set each digit and confirm each setting.
4. Select Confirm and confirm.
8.2.4 Changing the display language
1. Select Settings > Instrument > Language and confirm.
2. Select the desired language from the list and confirm.
8.2.5 Configuring the function key
This function is used to assign a predefined function to the
key. The selected function is activated by briefly taping the
key.
1. Select Settings > Instrument > Function key and confirm.
2. Select the desired function and confirm.
zRepeating the confirmation deactivates the selected
function.
zIf Bumptest is selected:
The maintenance symbol is shown on the right hand
side of the display and the maintenance signal is output.
Repeating the confirmation ends the bump test and the
device reverts to the normal measurement mode.
zIn measurement mode, the selected function can be
activated by briefly pressing .
Selection options:
8.2.6 Resetting the device to factory settings
The following device parameters are reset to the factory
settings with this function (see chapter 13.3 on page 33).
zAlarm parameters
zPasswords
zLanguage
zFunction key
zHART interface
zData logger
zAnalog interface
zRelay configuration
1. Select Settings > Instrument > Device init. and confirm.
2. Select Confirm and confirm in order to reset the device to
the factory settings.
8.2.7 Deactivating the software dongle
This function allows the SW dongles to be deactivated before
they are removed or in the event of a fault.
A dongle can only be reactivated by switching the power to the
device off and on.
1. Select Settings > Instrument > SW dongle > Dongle
datalogger/Dongle sensortest/Dongle diagnostic and
confirm.
2. Select Deactivate func. and deactivate Dongle datalogger/
Dongle sensortest/Dongle diagnostic with .
8.2.8 Display settings
Changing the contrast
1. Select Settings > Instrument > Display > Display contrast
and confirm.
2. Change the contrast and confirm.
Changing the display mode
The display of measured values can be turned on or off with
this function.
1. Select Settings > Instrument > Display > Display mode
and confirm.
2. Select Standard or Non display and confirm.
If "Non display" has been selected, the display shows the start
screen and the symbols.
If the relay option is set and an alarm is triggered, the display
shows the current gas concentration and the red LED flashes,
regardless of the selected display mode.
Graph (only with
data logging)
The measurements from the sensor
are displayed graphically on a time axis
(see chapter 7.3.2 on page 17).
Faults Faults are displayed in plain text
(see chapter 7.1.2 on page 17).
Warnings Warnings are displayed in plain text
(see chapter 7.1.1 on page 17).
Bump test The bump test allows gas to be applied
without an alarm being issued. The
maintenance signal is output on the
4-20 mA output.
Sensor vitality Shows the remaining sensor vitality
(only available for certain sensors).
OK