FAFNIR TORRIX M12 Level Sensor Technical Documentation
Below you will find brief information for Level Sensor TORRIX M12. The TORRIX M12 is a high-precision magnetostrictive level sensor designed to provide continuous gauging of liquid media levels in tanks; it is largely unaffected by temperature. This method is ideal for applications where accurate level measurements are required, such as in the chemical industry. The TORRIX M12 is available in versions with screw-in unit or flange connection.
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Technical Documentation
TORRIX M12
The magnetostrictive level sensor with PC configuration
Edition: 2014-03
Version: 1
Article no.: 350164
FAFNIR GmbH • Bahrenfelder Str. 19 • 22765 Hamburg • Tel.: +49 /40 / 39 82 07-0 • Fax: +49 / 40 / 390 63 39
I
Table of contents
Connection diagram of the standard version ...................................................... 8
Configuration TORRIX (Ex) C/CI/CV/CVT ........................................................... 14
Table of contents
VISY-Stick / TORRIX … EC type-examination certificate ..................................... 22
Table of contents II
1
Overview
The high-precision TORRIX level sensor is designed to provide continuous gauging of liquid media levels in tanks. The measuring principle used by the sensor exploits the physical effect of magnetostriction and is largely unaffected by temperature. This method is particularly ideal where level measurements are required to be extremely accurate, such as in the chemical industry.
In this documentation, the TORRIX is described as a variant with M12 plug connector. As another option, the TORRIX with cable gland is available, see:
• Technical documentation TORRIX, art. no. 207074
The TORRIX with M12 plug connector is available in versions with screw-in unit or flange connection.
There are several TORRIX versions with different interface. Probe lengths are possible from 100 mm to 6 m, as Flex version up to 10 m, as well as versions for different temperature and pressure ranges.
It also comes in the following versions:
• TORRIX C / CI / CV / CVT: 4 ... 20 mA output signal and configuration via PC
TORRIX C: Compact, media-contacting probe tube made of stainless steel 316TI,
TORRIX CI: Compact, media-contacting probe tube made of stainless steel 304,
TORRIX CV: Compact vibration resistant,
TORRIX CVT: Compact vibration resistant for tank trucks, with wave attenuation
• TORRIX RS485: with MODBUS ASCII or FAFNIR Universal Device Protocol, media-contacting probe tube made of stainless steel, see:
TORRIX RS485 with MODBUS Protocol, Art. No. 350187
• TORRIX SC: with FAFNIR protocol for FAFNIR interface, media-contacting probe tube made of stainless steel
• TORRIX ... FLEX: with all interfaces, media-contacting probe tube (flexible) made of stainless steel
To install the TORRIX Flex version see:
• TORRIX Flex Installation Guide multilingual, art. no. 350118
The level sensor TORRIX Ex … with Ex approval (ATEX, IECEx) can be installed in potentially explosive areas which require equipment protection level Ga (Ex Zone 0),
Ga/Gb (Ex Zone 0/1) or Gb (Ex Zone 1) for electrical equipment.
Page 1/44 Overview
2
Safety instructions
The purpose of the TORRIX level sensor is to gauge liquid levels in tanks. The level sensor must be used exclusively for this purpose. The manufacturer accepts no liability for any form of damage resulting from improper use!
The level sensor has been developed, manufactured and tested in accordance with the latest good engineering practices and generally accepted safety standards. Nevertheless, hazards may arise from its use. For this reason, the following safety information must be observed:
• Do not change or modify the level sensor or add any equipment without the prior consent of the manufacturer.
• The installation, operation and maintenance of the level sensor must be carried out only by expert personnel. Specialised knowledge must be acquired by regular training.
• Operators, fitters and service technicians must observe all applicable safety regulations. This also applies to any local safety and accident prevention regulations which are not stated in these operating instructions.
The safety instructions in this manual are marked as follows:
If these safety instructions are not observed, it may result in the risk of accident or damages to the TORRIX level sensor.
Useful information designed to ensure continued and correct operation of the TORRIX level sensor or helpful advice to make your work easier.
Safety instructions Page 2/44
3
Design and function
The design of the TORRIX level sensor is illustrated in the version with screw-in unit (see following figure).
At the sensor head (1) of the level sensor are the M12 plug connector (2) and the connection for the potential equalization (3). The electrical connection is via M12 plug on the sensor head.
Probe tube (4) features a screw-in unit (5) (cutting ring fitting or ferrule fitting) for height adjustment capability or a flange (not shown) for fixed installation. Float (6) is the key component for continuous gauging of the product filling level or boundary layer and is held on the probe tube by a guard ring (7).
3
2
1
4
5
6
7
Figure 1: TORRIX with screw-in unit
Different floats for different media are available, see chapter 8.2.
Page 3/44 Design and function
The measuring principle illustrated in the following figure exploits the physical effect of magnetostriction and is largely unaffected by temperature. The probe tube contains a tensioned wire (1) made of magnetostrictive material. The sensor electronics transmit current pulses (2) through the wire, which generate a circular magnetic field (3). A magnet (4) contained in the float acts as the filling level sensor. Its magnetic field applies an axial magnetic field to the wire. The superposition of the two magnetic fields produces a torsional wave (5) at the float position, which then propagates along the wire in both directions. One wave propagates directly to the sensor head; the other propagates down to the bottom of the probe tube and is reflected. The time between the current pulse being transmitted and the waves arriving at the sensor head is measured. From these propagation times, it is possible to determine the current position of the float.
Figure 2: Operating principle of the TORRIX level sensor
Design and function Page 4/44
4
Installation
When installing and maintaining the level sensor in potentially explosive areas, the national rules must be observed (Explosion Protection Regulations, Industrial Health and Safety Regulations, Equipment Safety Regulations and specific conditions of the EC-type examination certificates). The generally accepted rules of engineering and these operating instructions must be observed.
All applicable local safety and accident prevention regulations not included in these operating instructions must also be observed.
This section describes how to install the level sensor depending on the type (see the following figure).
Sensor head
Sensor head
Screw-in unit
Probe tube
ø 12
Flange
Probe tube
ø 12
TORRIX with screw-in unit
Figure 3: TORRIX versions
Float
Guard ring
Page 5/44
Float
TORRIX with flange
Guard ring
Installation
During installation, take great care not to bend the probe tube, and protect the float from shock and impact loads.
Installing a level sensor in areas exposed to a powerful external magnetic field is not permitted because this could impair gauging.
The level sensor can also be fitted into the tank from underneath.
If the float is removed during installation, it must be slid back onto the probe tube afterwards with the “TOP” marking oriented towards the sensor head end, to enable correct measurements to be made.
4.1
Installation with screw-in unit
3
2
1
4
5
Figure 4: Installation with screw-in unit
Removal of the float is necessary only if the float does not fit through the installation opening in the tank. Otherwise, please proceed directly with steps 3, 6 and 7.
Insert the level sensor into the tank (see Figure 4):
(1) Loosen both set screws, remove guard ring (1) and remove float (2) from probe tube (3).
(2) If necessary, slot screw-in unit (4) onto the probe tube.
(3) Insert the level sensor into the tank, provide screw-in unit thread (4) with a suitable sealing material, screw it in and tighten.
(4) Slide float (2) back onto probe tube (3).
For correct gauging, the float must be slid onto the probe tube with the
“TOP” marking oriented towards the sensor head end, to enable correct measurements to be made.
Installation Page 6/44
(5) Refit guard ring (1) on the tube, align the set screws with the groove and tighten.
(6) Adjust the height of the process connection and fix the union nut (5) by hand finger-tight.
(7) Fix the union nut (5) with a 1 ¼ clockwise turn (see following figure).
5
Figure 5: Compression fitting fixing
4.2
Installation with flange
The probe tube is permanently welded to the flange, which means that the installation length cannot be altered.
Secure the flange using the flange screws.
If the float does not fit through the installation opening, see installation instructions
Page 7/44 Installation
5
Electrical connection
5.1
TORRIX (Ex) C / CI / CV / CVT
5.1.1 Connection diagram of the standard version
The level sensor without Ex approval is installed in accordance with the following wiring diagram:
Power supply
Load
Cable resistance
Figure 6: Wiring diagram TORRIX
Power supply: U max
= 50 V DC
Minimum supply voltage: U min
) / 0.0215 A min
= 8 V
Total resistance (including cable resistance and load):
ΣR = (U - U
5.1.2 Connection diagram of the Ex version
The level sensor with Ex approval is installed in accordance with the following wiring diagram:
(Ex version)
Isolation amplifier
(example)
Cable resistance
Power supply
Figure 7: Wiring diagram for TORRIX in a potentially explosive atmosphere
Power supply: U max
= 30 V DC
Minimum supply voltage: U min
) / 0.0215 A min
= 8 V
Total resistance (including cable resistance and load):
ΣR = (U - U
Electrical connection Page 8/44
The intrinsically safe version of the TORRIX Ex C/CI level sensor, when installed in a potentially explosive atmosphere, is permitted to be connected only to associated equipment that have been certified by a recognised inspection authority and offer electrical outputs that meet the following conditions:
U
0
≤ 30 V
I
0
≤ 200 mA
P
0
≤ 1 W
Further data can be found in the EC type-examination certificate (refer to the Appendix).
If the level sensor is to be used in a potentially explosive atmosphere, always make sure that the permissible capacitance and inductance of the associated equipment are not exceeded (refer to the electrical data in the EC typeexamination certificate).
Used in an explosion-proof application, the connecting cable to the associated equipment must be marked, preferably as a blue cable for intrinsically safe electric circuits.
5.1.3 Wiring
The wiring of the level sensors TORRIX (Ex) C / CI may only be carried out with the power disconnected. For wiring, proceed as follows:
• If not already connected, plug the coupling of the FAFNIR connection cable onto the M12 connector of the sensor head. First tighten the union nut of the M12 connector by hand and then use an open-ended spanner to tighten the nut further 180°. The tightening torque should be between 100 … 150 Ncm.
• Connect the cable coming from the evaluation unit with the FAFNIR connection cable, for example using an installation sleeve, in the following assignment:
Signal
Voltage not used
Voltage not used
Colour coding of FAFNIR cables
+ brown white
– blue black
Assignment of the M-12 coupling
Pin 1
Pin 2
Pin 3
Pin 4
Pin 3
Pin 2
Pin 4
Pin 1
Pin assignment of the coupling of the FAFNIR connection cable
The connection cable between the TORRIX ... and the associated equipment must have the following properties:
Page 9/44 Electrical connection
• 2-core unshielded cable
• For Ex applications colour blue or marked blue (cable for intrinsically safe power circuits)
The earthing or equipotential bonding must be carried out by the installer in accordance with the national installation regulations applicable in each case. The earth connector of the sensor head can be used for earthing or equipotential bonding requirements.
Note also the general installation regulations.
5.1.4 Cable length
The maximum cable length depends on the total resistance (see chap. 5.1.1 ), composed
of the line resistances and the load of connected devices.
The cable (length and cross-section) must be chosen so that the supply voltage will not fall below the sensor-specific minimum voltage (8 V) in the event of a maximum current consumption (21.5 mA).
If the level sensor is to be used in a potentially explosive atmosphere, always make sure that the permissible capacitance and inductance of the associated equipment are not exceeded (refer to the electrical data in the EC typeexamination certificate).
Because of the voltage drop of 6 V the terminal housing UM-L (Ex) can be used with TORRIX only at a supply voltage higher than 14 volts.
The following table shows the maximum total resistances at different supply voltages, and cable resistances at various cross-sections:
Supply voltage
[V]
12 (-5%)
24 (-5%)
Max. total resistance
[Ω]
158
688
Cable crosssection
[mm²]
0.5
1.0
1.5
0.5
1.0
1.5
Cable resistance per m copper cable
[Ω/m]
0.0356
0.0178
0.0119
0.0356
0.0178
0.0119
For UM-L (Ex) terminal housing suitable (yes/no)
no no no yes yes yes
Electrical connection Page 10/44
The maximum cable length is calculated as follows:
L = (((U – U min
) / I max
) – R
B
) / R
Q
R
B
R
Q
L = Cable length [m]
U = Supply voltage [V] (with negative tolerance value -5%)
U min
I max
= Minimum supply voltage [V] = 8 V
= Maximum power consumption [A] = 0.0215 A
= Load
= Cable resistance copper cable per m
[Ω] at cable cross-section Q [mm²]
Example:
Supply voltage: 12 V (± 5%)
Supply voltage U = 11.4 V (12 V - 5%)
Minimum supply voltage U min
= 8 V
Highest power consumption I max
= 0.0215 A
Load R
B
= 86.8
Ω
Cable resistance R
Q
= 0.0356
Ω at cable cross-section Q = 0.5 mm²
L = (((11.4 – 8) / 0.0215) - 86.8) / 0.0356 = 2000 m
Thus a cable with forward and return line (2 wires) can be up to 1000 m long.
If the level sensor is to be used in a potentially explosive atmosphere, always make sure that the permissible capacitance and inductance of the associated equipment are not exceeded (refer to the electrical data in the EC typeexamination certificate). The cable capacitance is about 100 pF/m.
Page 11/44 Electrical connection
5.2
TORRIX (Ex) SC
The TORRIX (Ex) SC communicates with a FAFNIR evaluation unit via a
FAFNIR protocol. Therefore it can be operated only together with the LOGI-
Command or the VPI from FAFNIR.
5.2.1 Wiring
The wiring of the level sensors TORRIX (Ex) SC with the evaluation unit LOGI-Command or VPI must be carried out with the power disconnected. For wiring, proceed as follows:
• If not already connected, plug the coupling of the FAFNIR connection cable onto the M12 connector of the sensor head. First tighten the union nut of the M12 connector by hand and then use an open-ended spanner to tighten the nut further 180°. The tightening torque should be between 100 … 150 Ncm.
• Connect the cable coming from the LOGI-Command with the FAFNIR connection cable, for example using an installation sleeve, in the following assignment:
Signal
Voltage
Colour coding of FAFNIR cables
+ brown
Communication A white
Voltage – blue
Communication B black
Assignment of the M-12 coupling
Pin 1
Pin 2
Pin 3
Pin 4
Pin 3
Pin 2
Pin 4
Pin 1
Pin assignment of the coupling of the FAFNIR connection cable
The connection cable between TORRIX (Ex) SC and LOGI-Command/VPI must have the following properties:
• Four-core unshielded cable
• Line cross section (4 x 0.5 mm² up to 100 m and 4 x 1.0 mm² up to 200 m)
• For Ex applications colour blue or marked blue (cable for intrinsically safe power circuits)
• Maximum diameter 6 to 10 mm for reliable sealing by the cable gland in LOGI-
Command.
The earthing or equipotential bonding must be carried out by the installer in accordance with the national installation regulations applicable in each case. The earth connector of the sensor head can be used for earthing or equipotential bonding requirements.
Electrical connection Page 12/44
If the level sensor is to be used in a potentially explosive atmosphere, always make sure that the permissible capacitance and inductance of the associated equipment are not exceeded (refer to the electrical data in the EC typeexamination certificate).
Note also the general installation regulations.
For connection instructions of TORRIX (Ex) SC to connect to LOGI-Command, see:
• Technical documentation LOGI-Command, art. no. 350107
5.3
TORRIX (Ex) RS485
Under preparation!
Page 13/44 Electrical connection
6
User configuration
6.1
Configuration TORRIX (Ex) C/CI/CV/CVT
The configuration is done with the computer by a configuration tool.
The configuration with the computer must not be executed within the potentially explosive zone.
6.1.1 Requirements
• Operating system: Windows XP, 7 (32/64 bit), 8 (32/64 bit)
• USB interface for connecting the TORRIX with a FAFNIR USB adapter, art. no.
900040.
6.1.2 Installation
Copy the TORRIX-C configuration tool to the desired folder on your computer; no installation process is needed.
6.1.3 Preparation and program start
Connect the sensor TORRIX-C with a FAFNIR USB adapter to your computer.
Start the TORRIX-C configuration tool. Once the configuration tool is started, the following window is displayed:
Figure 8: TORRIX configuration
User configuration Page 14/44
In the COM port section select the defined COM port of the FAFNIR USB adapter.
Once the COM port has been selected, the configuration tool tries to get in contact with the probe. If a probe has been found, the following window will be displayed:
Figure 9: TORRIX-C configuration
6.1.4 User interface
The program window displays different sections:
• Probe data
• COM Port
• Measurement Data
• Configuration Data
• User Actions
• User Information
Description:
Probe data
This section shows the serial number and the firmware version number of the connected probe.
COM Port
This section shows the number of the selected COM port and the status of the transmit and receive lines.
Page 15/44 User configuration
Measurement Data
This section shows the measurement data read from the connected probe. To update the measurement data, press the "Read" button in the section "User Actions".
Configuration Data
This section shows the configuration data read from the connected probe. To read the recent configuration data, press the "Read" button in the section "User Actions". To save new configuration data, press the "Write" button in the section "User Actions". Note that the "Write" button is active only after a change to the existing configuration data. If you want to undo changes to the configuration data that have not been transmitted to the probe, press the "Read" button.
User Actions
This section contains two buttons. The "Read" button to read out the measurement and configuration data of the connected probe and the "Write" button to save the changed configuration data to the probe.
User Information
This section informs the user about the current state of the configuration tool.
6.1.5 Failure mode
If a malfunction is preventing the level sensor from recording a plausible float position, i.e. the measured level is incorrect, the sensor will enter failure mode after a short time.
Failure mode signalling conforms to the NAMUR NE43 recommendation. The failure current is set by default to 21.5 mA but this value can also be set to 3.6 mA.
The adjustment of the power consumption in the failure mode is done via the configura-
tion tool (see Figure 9) with the selection box "Alarm Current".
The adjustment of the power consumption during the failure mode is not saved until the "Write" button has been pressed. The new configuration is retained even if the level sensor is subsequently disconnected from the power supply.
6.2
Configuration TORRIX (Ex) SC
The configuration is done via the LOGI-Command.
6.2.1 Failure mode
The error output is via the protocol.
User configuration Page 16/44
6.3
Configuration TORRIX (Ex) RS485
Under preparation!
7
Maintenance
7.1
Return shipment
Before returning any FAFNIR equipment the returned goods authorization by the FAFNIR customer care is required. Please contact your account manager or the customer care to get the instructions for the return of goods.
The return of FAFNIR equipment is possible only with authorization by the
FAFNIR customer care.
Page 17/44 Maintenance
Sensor head
Probe tube
Communication
8
Technical data
8.1
Sensor
Electrical connection
TORRIX (Ex) C/CI/CV/CVT
TORRIX (Ex) SC
TORRIX (Ex) RS485
Power supply
TORRIX C/…
TORRIX Ex …
Process connection
Two-line terminal
4 … 20 mA (3.8 … 20.5 mA) current consumption for level display
21.5 mA (3.6 mA) current consumption in failure mode
4-wire connection (TTL signal + power supply)
4-wire connection (RS485 signals + power supply)
8 … 50 V DC
8 … 30 V DC
Screw-in unit with possibility of variable height adjustment
Standard G ½ (cutting ring coupling)
Flange (on request)
For material, see probe tube
Height 93 mm
Diameter 47.2 mm
IP68 (in accordance with TÜV NORD test report 13 993 1204 83 of
02.09.2013)
Material: stainless steel
M12 connector
Temperature -40 to +85 °C
Probe lengths from 100 mm … 6 m, as Flex version up to 10 m
Diameter 12 mm (other diameters on request)
Material stainless steel (1.4571 /
1.4301)
(Hastelloy, or other materials on request)
Standard temperature -40 °C ... +85 °C
Normal temperature
(NT) -40 °C … +125 °C
High temperature
(HT) -40 °C … +250 °C
Ultra high temperature
(HHT) -40 °C … +450 °C
Low temperature
(LT) -65 °C … +125 °C
Lowest temperature (LLT) -200 °C ... +85 °C
TORRIX (Ex) C / CI / CV / CVT 4 … 20 mA
TORRIX (Ex) SC FAFNIR protocol
TORRIX (Ex) RS485 MODBUS ASCII / FAFNIR Universal
Device Protocol
Technical data Page 18/44
Accuracy
HT/HHT digital component
Linearity better than ±1 mm or ±0.05%, better than ±0.01% per K
Repetition accuracy better than 0.1 mm
Resolution better than 50 µm
Accuracy
NT/LT digital component
On request
Linearity better than ±0.2 mm or ±0.01 %, better than ±0.001 % per K
Repetition accuracy better than 0.05 mm
Resolution better than 10 µm
Accuracy
Analogue component
Linearity better than ±0.01 %
Temperature drift better than ±0.01 % per K
Resolution better than 0.5 µA (16 bit)
8.2
Floats
The float is a key component of the level sensor that must be matched to the medium in respect of density, pressure resistance and material durability.
The following floats are exchangeable and are available to order separately. Other float types and materials are available on request.
The density and magnet position of floats of the same type may vary slightly, in which case readjustment may be required.
All floats are also suitable for use at a pressure of -1 bar (vacuum).
Excerpt from available float range: min. medium density [g/cm³]
Material max. operating pressure
[bar] at 20 °C *)
0.5
0.6
0.7
0.7
0.7
0.85
0.95
Titanium
1.4571 / 316 Ti
1.4571 / 316 Ti
C276
1.4571 / 316 Ti
1.4571 / 316 Ti
1.4571 / 316 Ti
20
20
16
10
40
20
50
Shape
[mm]
Ball ø 50
Ball ø 52
Cylinder ø 53
Cylinder ø 46
Ball ø 52
Ball ø 43
Ball ø 43
*) above 50 °C the maximum operating pressure decreases
Pressure resistance is guaranteed for undamaged floats only. Even the most minor and invisible dents, which can occur if, for example, the float is dropped from a bench onto a stone floor, are sufficient to cause a significant deterioration in pressure resistance.
Page 19/44 Technical data
9
List of figures
Figure 7: Wiring diagram for TORRIX in a potentially explosive atmosphere ...................... 8
List of figures Page 20/44
Annex
10
Annex
10.1 EC Declaration of Conformity
Page 21/44 Annex
10.2 VISY-Stick / TORRIX … EC type-examination certificate
Page 1/3
Annex Page 22/44
Type examination certificate
Page 2/2
Page 23/44 Annex
10.2.1 1st Supplement
Annex Page 24/44
10.2.2 2nd Supplement
Page 25/44 Annex
Annex Page 26/44
10.2.3 3rd Supplement
Page 27/44 Annex
Annex Page 28/44
10.2.4 4th Supplement
Page 29/44 Annex
Annex Page 30/44
Page 31/44 Annex
10.2.5 5th Supplement
Annex Page 32/44
Page 33/44 Annex
10.2.6 6th Supplement
Annex Page 34/44
Page 35/44 Annex
Annex Page 36/44
Page 37/44 Annex
10.2.7 Instructions
Filling level sensors type VISY-Stick … and type TORRIX Ex …
TÜV 99 ATEX 1496
Edition: 12.2013
I Range of application
The filling level sensors are designed for continuous measurement of liquid levels. Floats are used to measure the liquid levels. These slide on a sensor tube. For water detection, a second float is mounted on the sensor tube. In addition, the density of the liquid can be determined via a density module.
The power supply for the filling level sensors VISY-Stick … and the forwarding of the measured data to a superordinate evaluation system is provided by measurement converter VP … or VPI or, in the case of the sensor VISY-Stick … TLS, by the TLS console … from Veeder-Root. If an RS485 interface is used, the sensor
VISY-Stick … RS485 can be used.
The filling level sensors TORRIX Ex … can be produced with different interfaces. These are, for example, interfaces "4 … 20 mA" (TORRIX Ex C…), "RS485" (TORRIX Ex RS485…) or TAG (TORRIX Ex TAG…). The filling level sensors TORRIX Ex SC… are connected to the measurement converter VP-… or VPI.
II Standards
The filling level sensors are designed in accordance with the following European standards
EN 60079-0:2012
EN 60079-11:2012
EN 60079-26:2007
III Instructions for safe …
III.a
… use
Equipment – General Requirements
Equipment protection by intrinsic safety "i"
Equipment with Equipment Protection Level (EPL) Ga
The approval applies to equipment type VISY-Stick … and TORRIX Ex …
The filling level sensors are designed as intrinsically safe apparatuses and are approved for use in potentially explosive areas. The "Advanced" types (TORRIX Ex ...-A, VISY-Stick ... Advanced ...) and the "flexible" types
(TORRIX Ex ... Flex, VISY-Stick ... Flex ...) can be used for all gases of groups IIA and IIB. All other filling level sensors can be used for all gases of groups IIA, IIB and IIC.
To use a non-conductive plastic floats in potentially explosive areas the hazard of static charging must be prevented. Here a few conditions need to be observed:
• The use of the float in strongly flowing, non-conductive liquids is forbidden;
• There must be no agitator/mixer in the tank;
• Frictions on non-conductive components are to be avoided;
• The float must not be cleaned in a dry state.
III.b
… Assembly or disassembly
The assembly and disassembly must solely be carried out with the power disconnected!
Prior to the installation, it may be necessary that the float/s or the density module is disassembled. During the assembly it must be ensured that the floats / the module are/is mounted the right way on the sensor tube.
The housing (sensor head) must not be opened! Disassembly may damage the filling level sensor and void its approval.
Annex Page 38/44
III.c
… Installation
All wiring operations must solely be carried out with the power disconnected. Special rules and regulations, including EN 60079-14 and local installation regulations, must be observed.
If the filling level sensor is supplied with screw-in unit, the thread of the screw-in unit must be fitted with a suitable sealing material, screwed into the existing sleeve and tightened. In case of a riser installation the plastic centering aid is plugged onto the sensor head. Then allow the sensor to slide into the riser tube until it stands firmly on the bottom. If the filling level sensor is supplied without process fitting, the installer is responsible for compliance with the EX requirements.
General information (see also EN 60079-26, clause 4.6):
If the filling level sensor is installed into the boundary wall between Zone 0 and Zone 1, it is essential to ensure that a minimum protection of IP67 is achieved after installation.
Flexible filling level sensor (TORRIX Ex … Flex …, VISY-Stick … Flex …)
This type can be produced with different sensor bases to serve for stabilizing the sensor. A base can be a magnetic base. The magnet is then encapsulated in an electricity conducting plastic and can therefore be used in potentially explosive areas.
LPG filling level sensor VISY-Stick LPG …
The adjustable installation kit for LPG tanks was developed to allow the sensor to be installed and removed at any time without any additional work and without having to open the tank. The adjustable installation kit for LPG tanks consists of a jacket pipe with special LPG float made of BUNA and a ¾“ NPT cutting ring fitting. In the case of installation with a cutting ring fitting, the position of the sensor can no longer be altered after the union nut has been tightened.
Environmental sensor VISY-Stick Sump …
This environmental sensor can be fixed with the mounting kit.
When wiring the sensor to the evaluation unit (preferably blue coloured cable), the approved inductance and capacitance of the associated equipment must not be exceeded. The terminals of the sensor must be connected to the same terminals of the transducer.
Pin assignment:
Pin Wire M12 (Female)
1
2
3
+
A
-
4 B
Table 1: Pin assignment of the filling level sensor
A PA connecting terminal on the sensor head is available for integration of the filling level sensors into the potential equalization.
III.d
… Calibration
To operate the filling level sensors, security settings are not necessary.
III.e
… Commissioning
Before commissioning, all equipment must be checked to ensure it is properly connected and installed. The power supply, as well of connected equipment, must be checked.
Page 39/44 Annex
III.f
… maintenance, overhaul and repair
In general, the filling level sensor is maintenance-free. In case of a defect it must be send back to FAFNIR or one of his representations.
In accordance with the requirements for dielectric strength in EN 60079-11, clause 6.3.13 there is compliance with the insulation test between the intrinsically safe circuit and the chassis of the filling level sensor with a voltage of 500 V a.c.
Warning: The type VISY-Stick Sump … and float made of non-conductive plastic must only be cleaned with a damp cloth, to minimize the risk of electrostatic charging.
IV Equipment marking
1 Manufacturer: FAFNIR GmbH, Hamburg
2 Type designation: VISY-Stick … or
TORRIX Ex …
3 Serial number:
4 Certificate Number:
5 Ex marking:
Ser. N°: …
TÜV 99 ATEX 1496
Type TORRIX Ex SC… or
VISY-Stick …
II 1 G
Ex ia IIC T4 Ga
II 1/2 G
Ex ia IIC T6…T4 Ga/Gb
II 2 G Ex ia IIC T6…T4 Gb
Type TORRIX Ex SC…-A or TORRIX Ex SC… Flex or
VISY-Stick … Advanced or VISY-Stick … Flex
II 1 G
Ex ia IIB T4 Ga
II 1/2 G
Ex ia IIB T6…T4 Ga/Gb
II 2 G Ex ia IIB T6…T4 Gb
Type TORRIX Ex C… or TORRIX Ex RS485… or TORRIX Ex TAG… or
VISY-Stick … RS485 or VISY-Stick … TLS
II 1 G
Ex ia IIC T4 Ga
II 1/2 G
Ex ia IIC T4…T3 Ga/Gb
II 2 G Ex ia IIC T4…T3 Gb
Type TORRIX Ex C…-A or TORRIX Ex RS485…-A or TORRIX Ex TAG…-A or
TORRIX Ex C… Flex or TORRIX Ex RS485… Flex or TORRIX Ex TAG… Flex or
VISY-Stick … Advanced RS485 or VISY-Stick … Advanced TLS or
VISY-Stick … Flex RS485 or VISY-Stick … Flex TLS
II 1 G
Ex ia IIB T4 Ga
II 1/2 G
Ex ia IIB T4…T3 Ga/Gb
II 2 G Ex ia IIB T4…T3 Gb
6
*Warning:
CE marking:
8 Technical data:
WARNING – Potential electrostatic charging hazard – See instructions
0044
See instruction manual for technical data
* Warning applies only to sensor VISY-Stick Sump … and sensors with a plastic float
Annex Page 40/44
V Technical data
The following electrical input values apply to the filling level sensors:
Electrical variable
TORRIX Ex SC…
VISY-Stick …
VISY-Stick … TLS
TORRIX Ex C…
TORRIX Ex RS485…
TORRIX Ex TAG…
VISY-Stick … RS485
U i
I i
P i
≤
≤
15 V
60 mA
13 V
200 mA
30 V
200 mA
≤
100 mW 625 mW 1 W
C i
< 10 nF 20 nF 10 nF
L i
< 100 µH 410 µH 20 µH
Table 2: Electrical input data of filling level sensors
When using the equipment in potentially explosive atmospheres, please consult table 3 and table 4 for the maximum temperatures depending on temperature classes and categories.
Type TORRIX Ex SC… or VISY-Stick …
Temperature class T a
T4, T3, T2, T1
Category 1 or equipment protection level Ga
(filling level sensor completely installed in Zone 0)
-20 °C … +60 °C
T
F
T6
Category 1/2 or equipment protection level Ga/Gb
(sensor head installed in Zone 1, and sensor tube in Zone 0)
-40 °C … +50 °C
T5 -40 °C … +65 °C
-20 °C … +60 °C
T4, T3, T2, T1
T6
T5
T4
-40 °C … +85 °C
Category 2 or equipment protection level Gb
(filling level sensor completely installed in Zone 1)
-40 °C … +50 °C -40 °C … +85 °C
-40 °C … +65 °C -40 °C … +100 °C
-40 °C … +135 °C
T3 -40 °C … +200 °C
T2
T1
-40 °C … +85 °C
-40 °C … +300 °C
-40 °C … +450 °C
Table 3: Operating temperatures of the filling level sensors in basic version (without interface board)
Page 41/44 Annex
TORRIX Ex C… or TORRIX Ex RS485… or TORRIX Ex TAG… or VISY-Stick … RS485 or VISY-Stick … TLS
T
F
Temperature class T a
T4, T3, T2, T1
Category 1 or equipment protection level Ga
(filling level sensor completely installed in Zone 0)
-20 °C … +60 °C
T4
Category 1/2 or equipment protection level Ga/Gb
(sensor head installed in Zone 1, and sensor tube in Zone 0)
-40 °C … +75 °C
-20 °C … +60 °C
T3, T2, T1 -40 °C … +85 °C
T4
Category 2 or equipment protection level Gb
(filling level sensor completely installed in Zone 1)
-40 °C … +75 °C -40 °C … +135 °C
T3
T2 -40 °C … +85 °C
-40 °C … +200 °C
-40 °C … +300 °C
T1 -40 °C … +450 °C
Table 4: Operating temperatures of the filling level sensors with 4 … 20 mA, RS485 or TAG interface
For use in category 1G or 1/2G, the following applies:
The process pressure for the media must be between 0.8 bar and 1.1 bar where explosive vapor-air mixtures are present. If no explosive mixtures are present, the equipment may also be operated outside this area according to the manufacturer's specification.
It must be ensured through appropriate measures that the temperature (T a class is not exceeded at any point on the sensor head.
) for the respective temperature
General information (see also EN 60079-0, clause 1):
Zone 0 exists only under atmospheric conditions:
Temperature range: -20 °C … +60 °C
Pressure range:
Oxidants:
0.8 bar … 1.1 bar
Air (oxygen content approx. 21 %)
The filling level sensors achieve a degree of protection:
Protection rating: IP68
VI Specific conditions
The environmental sensors VISY-Stick Sump … are enclosed in a protective tube made of aluminium. The risk of ignition due to impact or friction is to be avoided.
Annex Page 42/44
Page 43/44 Annex
Annex Page 44/44
FAFNIR GmbH
Bahrenfelder Str. 19
22765 Hamburg, Germany
Tel.: +49 / 40 / 39 82 07–0
Fax: +49 / 40 / 390 63 39
E-mail: [email protected]
Web: www.fafnir.com
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Key Features
- Magnetostrictive level sensor
- PC configuration
- High precision
- Screw-in unit or flange connection
- Temperature-independent
- Continuous gauging
- For liquid media levels
