GESTRA LRGT 16-3 Installation instructions

Original Installation &
Operating Manual
Conductivity Transmitter
LRGT 16-3
LRGT 16-4
LRGT 17-3
819877-00
EN
English

2LRGT 1x-x - Installation & Operating Manual - 819877-00
Contents
Content of this Manual................................................................................................................................... 4
Scope of delivery/Product package............................................................................................................... 4
How to use this Manual.................................................................................................................................. 5
Illustrations and symbols used...................................................................................................................... 5
Hazard symbols in this Manual...................................................................................................................... 5
Types of warning ............................................................................................................................................ 6
Specialist terms/Abbreviations...................................................................................................................... 7
Usage for the intended purpose..................................................................................................................... 8
Applicable directives and standards...........................................................................................................8
Admissible system components, dependent on the required safety level....................................................9
Improper use .................................................................................................................................................. 9
Basic safety information .............................................................................................................................. 10
Required personnel qualifications............................................................................................................... 11
Notes on product liability............................................................................................................................. 11
Functional safety, safety integrity level (SIL) .............................................................................................. 12
Check the secure current output regularly................................................................................................12
Reliability data to EN 61508 ......................................................................................................................... 13
Function ........................................................................................................................................................ 14
Technical data .............................................................................................................................................. 16
Name plate/Identification ............................................................................................................................ 19
Factory settings............................................................................................................................................ 21
Overall view .................................................................................................................................................. 22
LRGT 16-3...............................................................................................................................................22
LRGT 16-4...............................................................................................................................................22
LRGT 17-3...............................................................................................................................................22
Overall view .................................................................................................................................................. 23
Dimensions of the LRGT 16-3....................................................................................................................... 24
Dimensions of the LRGT 16-4....................................................................................................................... 25
Dimensions of the LRGT 17-3....................................................................................................................... 26
Installation.................................................................................................................................................... 27
Additional notes for installation................................................................................................................ 28
Example, LRGT 16-3................................................................................................................................ 29
Installation examples with dimensions....................................................................................................... 31
Conductivity measurement ......................................................................................................................31
Conductivity monitoring and continuous blowdown control ......................................................................32
Conductivity monitoring and continuous blowdown control via a separate level pot.................................. 33
Key for Fig. 12 to Fig. 14.......................................................................................................................... 34

3LRGT 1x-x - Installation & Operating Manual - 819877-00
Contents
Aligning the terminal box............................................................................................................................. 34
Functional elements..................................................................................................................................... 35
Electrical connection.................................................................................................................................... 36
Notes on electrical connection .................................................................................................................36
Connecting the 24V DC power supply ......................................................................................................36
Connecting the actual value output (4-20 mA)..........................................................................................36
Pin assignment of the M12 connector for non pre-wired control cables ...................................................36
Bringing into service .................................................................................................................................... 37
Changing the factory settings if necessary............................................................................................... 37
Changing the cell constant....................................................................................................................... 40
Changing the temperature coefficient ...................................................................................................... 41
Using the “CAL” function..........................................................................................................................41
Using the “FiLt” feature............................................................................................................................42
Changing the scale of the 4-20 mA actual value output ...........................................................................42
Changing the display unit (µS/cm or ppm)................................................................................................ 43
Manually initiating a display test.............................................................................................................. 43
Comparing the reading with the reference reading from a reliable sample ............................................... 44
Starting, operation and testing .................................................................................................................... 45
System malfunctions.................................................................................................................................... 48
Causes ....................................................................................................................................................48
Indication of system malfunctions using fault codes................................................................................. 49
Faults that do not provoke a shutdown.....................................................................................................51
Checking installation and function ...........................................................................................................52
Taking out of service/Disassembly.............................................................................................................. 53
Cleaning the measuring electrodes of the conductivity transmitter.......................................................... 54
Monthly comparison of readings .............................................................................................................54
Cleaning interval...................................................................................................................................... 54
Disposal ........................................................................................................................................................ 55
Returning decontaminated equipment........................................................................................................ 55
EU Declaration of Conformity....................................................................................................................... 55

4LRGT 1x-x - Installation & Operating Manual - 819877-00
Content of this Manual
Product:
 Conductivity Transmitter LRGT 16-3
 Conductivity Transmitter LRGT 16-4
 Conductivity Transmitter LRGT 17-3
First edition:
BAN 819877-00/09-2019cm
© Copyright
All rights reserved. Any misuse, particularly reproduction and dissemination to third parties, is not permitted.
The General Terms & Conditions of GESTRA AG apply.
Scope of delivery/Product package
 1 x conductivity transmitter LRGT 1x-x
 1 x sealing ring, D 33 x 39, form D, DIN 7603-2.4068, bright annealed
 1 x Installation & Operating Manual
Required accessories for LRGT 16-3, LRGT 17-3 and LRGT 16-4 when installing for the first time
 1 x cable jack, Hirschmann ELWIKA 5012

5LRGT 1x-x - Installation & Operating Manual - 819877-00
How to use this Manual
This Installation & Operating Manual describes how to correctly use LRGT 16-3, LRGT 16-4 and
LRGT 17-3 conductivity transmitters. It applies to persons who integrate this equipment in control
systems, install, bring into service, operate, maintain and dispose of this equipment. Anyone carrying out
the above-mentioned activities must have read this Installation & Operating Manual and understood its
contents.
 Read this Manual in full and follow all instructions.
 Please also read the instructions for use of any accessories.
 The Installation & Operating Manual is part of the product package. Keep it in an easily accessible
location.
Availability of this Installation & Operating Manual
 Make sure this Installation & Operating Manual is always available to the operator.
 If you pass on or sell the equipment to a third party, please also hand over the Installation & Operating
Manual.
Hazard symbols in this Manual
Danger zone/Dangerous situation
Illustrations and symbols used
1. Action to be taken
2.
 Lists
 Bullet points in lists
A Keys to illustrations
Additional
information
Read the relevant
Installation & Operating Manual

6LRGT 1x-x - Installation & Operating Manual - 819877-00
Types of warning
DANGER
Warning of a dangerous situation that results in death or serious injury.
WARNING
Warning of a dangerous situation that may possibly result in death or serious injury.
CAUTION
Warning of a situation that may result in minor or moderate injury.
ATTENTION
Warning of a situation that results in damage to property or the environment.

7LRGT 1x-x - Installation & Operating Manual - 819877-00
Specialist terms/Abbreviations
Here, we explain some abbreviations, specialist terms, etc., which are used in this Manual.
IEC 61508
International standard IEC 61508 describes both the type of risk assessment and actions taken to provide
appropriate safety functions.
SIL (safety integrity level)
Safety integrity levels SIL 1 to 4 are used to quantify risk reduction. SIL 4 is the highest level of risk reduction.
International standard IEC 61508 forms the basis for establishing, testing and operating technical safety
systems.
LRGT .. / LRR .. / URS .. / URB .. / SRL .. / etc.
Equipment and type designations of GESTRA AG.
SELV
Safety Extra Low Voltage
Operating point (of the system)
The operating point describes the operating parameters at which a plant or boiler is operated in the
nominal range. In a pressurised steam plant, for example, these parameters would be output, pressure
and temperature.
The design data may be a lot more stringent, however.
A boiler that is operated at 10 bar and 180°C may be designed for a pressure of 60 bar and a tempera-
ture of 275°C, for example, which is not necessarily its operating point.

8LRGT 1x-x - Installation & Operating Manual - 819877-00
Usage for the intended purpose
LRGT 16-3, LRGT 16-4 and LRGT 17-3 conductivity transmitters can be used as conductivity limiters and
continuous blowdown controllers to continually monitor conductivity in pressurised steam and hot-water
plants. They present a linear profile of conductivity in a preset measuring range via a 4-20mA current
output.
 The transmitter’s secure 4-20 mA actual value output (SIL 2) can be used with a suitable conductivity
controller, as a continuous blowdown controller with MIN/MAX alarm, for example.
 To ensure problem-free operation, pay attention to the requirements for water quality as specified in
the technical rules (TRD) and EN standards for pressurised steam plants.
 The equipment may only be used within the admissible pressure and temperature ratings, see
“Technical data” on page 16 and “Name plate/Identification” on page 19.
Applicable directives and standards
LRGT 16-3, LRGT 16-4 and LRGT 17-3 conductivity transmitters have been tested and approved for use in
the scope governed by the following directives and standards:
Directives:
 Directive 2014/68/EU EU Pressure Equipment Directive
 Directive 2014/35/EU Low Voltage Directive
 Directive 2014/30/EU EMC Directive
 Directive 2011/65/EU RoHS II Directive
Standards:
 EN 60730-1 Automatic electrical controls – Part 1:
General requirements
 EN 61508 Functional safety of electronic systems
Standards documents:
 VdTÜV Bulletin BP WÜ 0100-RL
Requirements for the testing of water monitoring equipment
Technical rules for pressurised steam plants - as a knowledge base:
This Manual occasionally refers to the TRD regulations as a knowledge base.
These regulations have not been in force since 1 March 2019 and are no longer updated.
They have been replaced by the TRBS (German Technical Rules for Industrial Health &
Safety).
Always observe the current regulations (EU directives, EN standards, information from emplo-
yers’ liability insurance associations, etc.) in order to comply with the current state of the art.

9LRGT 1x-x - Installation & Operating Manual - 819877-00
Usage for the intended purpose
Admissible system components, dependent on the required safety level
In accordance with EU Pressure Equipment Directive 2014/68/EU, standards EN12952, EN12953
and EN 61508 and the technical rules of VdTÜV Bulletin BP WÜ 0100-RL, the conductivity electrode can
be operated with safety integrity level SIL 2.
If a diagnostic tester that also has a SIL 2 rating is connected to the 4-20mA output, the entire event
chain system can be operated at this safety integrity level.
A diagnostic tester with a higher SIL rating does not increase the safety of the overall system.
The maximum achievable safety level is dictated by the lowest SIL rating of a participant in the
event chain as a whole.
Systems without SIL rating
In systems without a SIL rating, any controller, display unit or diagnostic tester with an input for a
standard 4-20 mA signal can be connected.
To ensure the proper use of equipment during all types of use, please also read the Installation
& Operating Manuals for the system components used.
 You can find the latest Installation & Operating Manuals for other system components on our
website:
http://www.gestra.com/documents/brochures.html
Improper use
There is a danger of death due to explosion if the equipment is used in potentially explo-
sive atmospheres.
Do not use the equipment in potentially explosive atmospheres.
Do not bring any equipment into service that does not have its own specific rating plate.
The rating plate indicates the technical features of the equipment.

10 LRGT 1x-x - Installation & Operating Manual - 819877-00
Basic safety information
Danger to life from scalding if the conductivity electrode is removed under pressure.
Steam or hot water can spurt forcefully out of the equipment.
 Only remove the conductivity electrode at 0 bar boiler pressure.
Risk of severe burns when working on a conductivity electrodes that has not been
allowed to cool. The conductivity electrode becomes very hot during operation.
 Always allow the conductivity electrode to cool.
 Perform all installation and maintenance work only when the conductivity electrode has
been allowed to cool.
There is a risk of electric shock during work on electrical systems.
 Always switch off the voltage to the plant before performing connection work.
 Check that the plant is not carrying live voltage before commencing work.
Danger to life from a faulty LRGT 1x-x conductivity electrode due to the sudden escape of
hot steam or hot water.
Shocks and impacts during transport or installation can result in damage to or leaks in the con-
ductivity electrode, causing pressurised hot steam or hot water to escape through the pressure
relief hole.
 To prevent damage during transport and installation, do not expose the electrode
rod to hard impacts.
 Before and after installation, check that the conductivity electrode is undamaged.
 When bringing the conductivity electrode into service, check that it is tight.
Attempts to repair the equipment will cause the plant to become unsafe.
 The LRGT 1x-x conductivity electrode may only be repaired by the manufacturer, GESTRA AG.
 Only replace faulty equipment with identical equipment from GESTRA AG.

11LRGT 1x-x - Installation & Operating Manual - 819877-00
Required personnel qualifications
Activity Personnel
Integration in control system Specialist staff Plant designer
Installation/electrical
connection/bringing into service Specialist staff
The unit is an item of equipment with a
safety function (EU Pressure Equipment
Directive) and may only be installed, electri-
cally connected and brought into service by
suitable, trained staff.
Operation Boiler service technician Staff trained by the plant operator.
Maintenance work Specialist staff
Maintenance and conversions may only be
performed by authorised staff who have
undergone specific training.
Refits Specialist staff Persons trained by the plant operator to work
with pressure and temperature.
Fig. 1
Notes on product liability
We the manufacturer cannot accept any liability for damages resulting from improper use of the
equipment.
Basic safety information
A lack of proper maintenance and cleaning can result in damage to the conductivity
electrode and/or false measurement results and warning messages.
 Once a year, check the conductivity electrode by performing reference measurements.
If the “CF” (cell constant) value of 003.0 is exceeded after recalibration, the warning
message “CF.Hi” will appear.
 Keep to the maintenance and cleaning intervals, see page 54.

12 LRGT 1x-x - Installation & Operating Manual - 819877-00
Functional safety, safety integrity level (SIL)
LRGT 16-3, LRGT 16-4 and LRGT 17-3 conductivity transmitters have a secure 4-20 mA actual value
output (SIL 2). If a diagnostic tester that also has a SIL 2 rating is connected to the 4-20mA output, the
entire event chain system can be operated at this safety integrity level.
When combined with the accessories, you will have a type B subsystem. The technical and safety
characteristics in Fig. 2 below are based solely on LRGT 16-3, LRGT 16-4 and LRGT 17-3 conductivity
transmitters.
Check the secure current output regularly
Once a year, check that conductivity transmitters are functioning correctly by initiating the test function
(T1 = 1 year).
The test function is initiated on site using the rotary knob integrated in the terminal box, see page 47.

13LRGT 1x-x - Installation & Operating Manual - 819877-00
Reliability data to EN 61508
Description Characteristic values
Type of electrode LRGT 1x-3 LRGT 16-4
Safety integrity level SIL 2 SIL 2
Architecture 1oo1 1oo1
Type of equipment Type B Type B
Hardware error tolerance HFT = 0 HFT = 0
Overall failure rate for dangerous undetected
failures λDU = < 50 * 10-8 1/h λDU = < 50 * 10-8 1/h
Overall failure rate for dangerous detected
failures λDD = < 5000 * 10-9 1/h λDD = < 5000 * 10-9 1/h
Safe failure fraction SFF > 95.0 % SFF > 90.0 %
Test interval T1 = 1 year T1 = 1 year
Probability of failure on demand PFD < 50 * 10-4 PFD < 50 * 10-4
Diagnostic coverage. Percentage of dangerous
failures detected by a test. DC > 90.0 % DC > 85.0 %
Mean time to failure MTTFd> 30 a MTTFd> 30 a
Diagnostic interval T2 = 1 hour T2 = 1 hour
Performance level (to ISO 13849) PL = d PL = d
Probability of failure per hour PFH < 50 * 10-8 1/h PFH < 50 * 10-8 1/h
Ambient temperature as a basis for calculation Tu = 60 °C Tu = 60 °C
Mean time to repair MTTR = 0
(no repair)
MTTR = 0
(no repair)
Fraction of undetected dangerous failures that
have a common cause beta = 2 % beta = 2 %
Fraction of detected dangerous failures that
have a common cause beta d = 1 % beta d = 1 %
Fig. 2

14 LRGT 1x-x - Installation & Operating Manual - 819877-00
Function
The equipment measures the electrical conductivity of electrically conductive fluids, and converts the infor-
mation into a conductivity-dependent 4-20 mA current signal.
Measuring process of the LRGT 16-3 and LRGT 17-3
LRGT 16-3 and LRGT 17-3 conductivity transmitters use the conductometric two-electrode measuring
process. A measuring current with a suitable frequency for the measuring range is introduced into the
fluid. This produces a potential gradient between the electrode and the measuring tube, which is analysed
as a measuring voltage.
Measuring process of the LRGT 16-4
The LRGT 16-4 conductivity transmitter uses the conductometric four-electrode measuring process. It
consists of two current and two voltage electrodes. The current electrodes introduce a measuring current
with a fixed frequency into the fluid. This gives rise to a potential gradient between these electrodes. This
potential gradient is then picked up by the voltage electrodes and analysed as measuring voltage.
Temperature compensation of readings based on a reference temperature (25°C)
The electrical conductivity changes as a function of the temperature. In order to base the readings on a
reference temperature, an integrated resistance thermometer measures the temperature of the fluid. The
electrical conductivity is calculated from the measuring current and measuring voltage, and then based
on the reference temperature of 25°C through temperature compensation.
Compensation process
Based on a set temperature coefficient, the conductivity reading is corrected to form a linear
characteristic. The coefficient (default 2.1 % per °C) is normally used for steam generating units with a
constant
pressure. Conductivity is established for an ambient temperature of 25 °C.
The gradient is then verified at service pressure using a calibrated conductivity meter.
Transmitter function
The transmitter function is the ability of the electrode to provide a scalable measuring range on the
4-20 mA current output interface and to make this available to one or more recipients for analysis.
Conductivity transmitters do not have any controlling or limiting functions.
Automatic self-test
An automatic self-test periodically monitors the safety and function of the conductivity transmitters and
measured value acquisition.
Faults in the electrical connection or electronic measuring equipment trigger an error message on the
display, and the current output is set to 0mA.

15LRGT 1x-x - Installation & Operating Manual - 819877-00
Function
Display and signals, see page 45 / 49 *
LRGT 1x-x conductivity transmitters feature a green 4-digit, 7-segment display for showing readings,
status information and fault codes. The operating status is indicated by one red and three green LEDs.
Behaviour when switched on *
The display alternately shows the software version, the type and then the measured conductivity.
Behaviour in normal operation (no faults) *
The display shows the measured conductivity value (4 digits), e.g. 1550, and converts this value into a
current signal from 4-20 mA, in accordance with the predefined measuring range (see page 42, Sout
parameter). When you select an appropriate measuring range, you can expect plausible measurement
signals immediately after installation.
Behaviour in the event of malfunctions *
The error state or malfunction is shown on the display by a fault code, e.g. E.005. For more on fault codes,
see page 49 / 50.
Every time there is a fault, 0 mA is output via the current output.
Electrode faults cannot be acknowledged.
When the fault is corrected, the message also disappears from the display of the conductivity
transmitter, and the LRGT 16-3, LRGT 17-3 or LRGT 16-4 returns to normal operation.
Behaviour when performing the test function *
Initiating the test function by pressing the rotary knob on the LRGT 1x-x causes the maximum output
current of 20 mA to be output. This enables you to check the effect of limit violation on connected
diagnostic testers.
* The tables on page 45 ff. clearly show the relationship between the equipment status,
the display and the status LEDs.
Setting parameters and changing factory settings
If necessary, you can adapt the electrode parameters to suit conditions at the plant. You can set
parameters and change factory settings using a rotary knob on the terminal box, see page 38 ff.

16 LRGT 1x-x - Installation & Operating Manual - 819877-00
Technical data
Model and mechanical connection
 LRGT 16-3, LRGT 16-4, LRGT 17-3 Thread G1 A, EN ISO 228-1, see Fig. 7, 8 and 9
Nominal pressure rating, admissible service pressure and temperature
 LRGT 16-3 PN 40 32 bar (g) at 238 °C
 LRGT 16-4 PN 40 32 bar (g) at 238 °C
 LRGT 17-3 PN 63 60 bar (g) at 275 °C
Materials
 Terminal box 3.2581 G AlSi12, powder-coated
 Sheath 1.4301 X5 CrNi 18-10
 Measuring electrodes 1.4571 X6CrNiMoTi17-12-2
 Electrode insulation PTFE
 Screw-in body:
 Measuring tube/screw of
LRGT 16-3, LRGT 17-3 1.4571, X6CrNiMoTi17-12-2
 Spacer disc of
LRGT 16-3, LRGT 16-4, LRGT 17-3 PEEK
Available electrode lengths (do not shorten)
 LRGT 16-3, LRGT 17-3 200, 300, 400, 500, 600, 800,1000 (mm)
 LRGT 16-4 180, 300, 380, 500, 600, 800,1000 (mm)
Temperature sensor
 Resistance thermometer Pt 1000
 Fluid temperature measuring range 0 to 280 °C
Conductivity range at 25 °C
 LRGT 16-3, LRGT 17-3 0.5 μS/cm to 6000 μS/cm, 0.25 - 3000 ppm *
 Preferred measuring range up to 1000 µS/cm
 LRGT 16-4 50 μS/cm to 10,000 μS/cm, 25 - 5000 ppm *
 Preferred measuring range from 500 µS/cm
* Conversion of µS/cm to ppm (parts per million): 1 μS/cm = 0.5 ppm
Measuring cycle
 1 second

17LRGT 1x-x - Installation & Operating Manual - 819877-00
Technical data
Measurement quality (figures for value ranges between the on-site calibration points)
 LRGT 1x-3
Resolution for internal processing * Measurement error Linearity error
 Range 1: 0.5 µS - 10 µS 7 % 2 %
 Range 2: 10 µS - 250 µS 3 % 2 %
 Range 3: 250 µS - 2600 µS 3 % 1 %
 Range 4: 2600 µS - 21000 µS 3 % 1 %
 LRGT 16-4
Resolution for internal processing * Measurement error Linearity error
 Range 1: 10 µS - 100 µS 2 % 2 %
 Range 2: 100 µS - 2000 µS 2 % 1.5 %
 Range 3: 2000 µS - 50000 µS 2 % 1 %
* Resolution for internal processing based on 15 bits with plus or minus sign (16 bits).
The above figures refer to the uncompensated conductivity.
Time constant “T” (measured using the two-bath process)
Temperature Conductivity
 LRGT 16-3, LRGT 17-3 9 seconds 14 seconds
 LRGT 16-4 11 seconds 19 seconds
Temperature compensation
 The temperature compensation process is linear and set via parameter tC, see page 41.
Supply voltage
 24 V DC +/-20 %
Power consumption
 Max. 7 VA
Current input
 Max. 0.35 A
Internal fuse
 T2A
Safety cutout at excessive ambient temperature
 The cutout takes place at an excessive ambient temperature of Tamb. = 75 °C
Electrode voltage
 < 500 mV (RMS) at no load

18 LRGT 1x-x - Installation & Operating Manual - 819877-00
Technical data
Analogue output
 1 x actual value output 4-20 mA
 Max. output load 500 Ω
 M12 connector, 5-pole, A-coded
Indicators and controls
 1 x 4-digit green 7-segment display for indicating actual values and status information
 1 x red LED for indicating an error state
 3 x green LEDs for indicating the unit μS/cm / ppm and OK status
 1 x rotary knob IP65 with button for menu navigation and test function
Protection class
 III Safety Extra Low Voltage (SELV)
IP rating to EN 60529
 IP 65
Admissible ambient conditions
 Service temperature: 0 °C – 70 °C
 Storage temperature: - 40 °C – 80 °C
 Transport temperature: - 40 °C – 80 °C
 Air humidity: 10 % – 95 %, non-condensing
Weight
 LRGT 16-3, LRGT 16-4, LRGT 17-3 approx. 2.1 kg

19LRGT 1x-x - Installation & Operating Manual - 819877-00
Name plate/Identification
IEC 61508 SIL 2
Betriebsanleitung
beachten
See installation instructions
Voir instructions de
montage
LRGT 16 - 3
0525
GESTRA AG
Münchener Str. 77
28215 Bremen
GERMANY
TÜV. XXX . XX-XXX
Leitfähigkeitstransmitter
Conductivity Transmitter
Transmetteur de mesure
de conductibilité
70°C (158 °F)T
PmaxPmax
TmaxTmax
P 40 G1 1.4571 IP65N
32 bar (464psi)
238°C (460°F)
7 VA
0,5-6000µS/cm0,25-3000ppm
OUT:
4-20 mA / 500 
V 20%24 ±
IP rating
Supply voltage
CE marking
Appointed authority
Disposal information
Protection class
Fig. 3
The date of production (quarter and year) is stamped on the screw-in body of each
conductivity transmitter.
Power consumption
Safety
note
Equipment designation
Equipment function
Nominal pressure rating,
connection thread,
material of
screw-in body
Current
approval
Manufacturer
Serial number
Admissible service pressure,
admissible temperature
Admissible ambient
temperature
Measuring range
Safety integrity level
Data interface

20 LRGT 1x-x - Installation & Operating Manual - 819877-00
Name plate/Identification
Fig. 4
IEC 61508 SIL 2
Betriebsanleitung
beachten
See installation instructions
Voir instructions de
montage
LRGT 16 -4
0525
GESTRA AG
Münchener Str. 77
28215 Bremen
GERMANY
TÜV. XXX . XX-XXX
Leitfähigkeitstransmitter
Conductivity Transmitter
Transmetteur de mesure
de conductibilité
70°C (158 °F)T
PmaxPmax
TmaxTmax
P 40 G1 1.4571 IP65N
32 bar (464psi)
238°C (460°F)
7 VA
50-10000µS/cm25-5000ppm
OUT:
4-20 mA / 500 
V 20%24 ±
IEC 61508 SIL 2
Betriebsanleitung
beachten
See installation instructions
Voir instructions de
montage
LRGT 17 - 3
0525
GESTRA AG
Münchener Str. 77
28215 Bremen
GERMANY
TÜV. XXX . XX-XXX
Leitfähigkeitstransmitter
Conductivity Transmitter
Transmetteur de mesure
de conductibilité
70°C (158 °F)T
PmaxPmax
TmaxTmax
P 63 G1 1.4571 IP65N
60 bar (870psi)
275°C (527°F)
7 VA
0,5- 000µS/cm60,25-3000ppm
OUT:
4-20 mA / 500 
V 20%24 ±