fafnir torrix Guide

Technical Documentation
FAFNIR GmbH • Schnackenburgallee 149 c • 22525 Hamburg • Germany • T.: +49 /40 / 39 82 07-0 • Web: www.fafnir.com
TORRIX
Version 5.5
The magnetostrictive level sensor
Edition: 2023-05
Version: 3
Art. no.: 350335

I Contents
Table of Contents
1Characteristics........................................................................................................... 1
2Safety Instructions ...................................................................................................2
3Design and Function ...............................................................................................3
3.1 TORRIX Types ..........................................................................................................................................4
4Mounting ...................................................................................................................5
4.1 Mounting with screw-in unit..............................................................................................................6
4.2 Mounting with flange...........................................................................................................................7
4.3 Mounting with Bypass..........................................................................................................................7
5Electrical connection ...............................................................................................9
5.1 Connection Diagrams.........................................................................................................................10
5.1.1 Wiring diagram TORRIX.....................................................................................................................10
5.1.2 Wiring diagram TORRIX Ex...............................................................................................................10
5.2 Length of the connection cable (TORRIX 4 … 20 mA variants)...........................................11
5.3 Wiring.......................................................................................................................................................12
5.3.1 Cable gland ............................................................................................................................................12
5.3.2 M12 Connection...................................................................................................................................13
6Adjustment ..............................................................................................................14
6.1 Measuring span of the level sensor ..............................................................................................14
6.1.1 Adjustment of the measuring span on the TORRIX................................................................14
6.1.2 Adjustment of the measuring span with the PC.......................................................................16
6.2 Current consumption in failure mode..........................................................................................17
6.2.1 Adjustment of the current consumption on the TORRIX......................................................17
6.2.2 Adjustment of the current consumption with the PC ............................................................18
7Maintenance............................................................................................................19
7.1 Servicing ..................................................................................................................................................19
7.2 Return Shipment ..................................................................................................................................19
8Technical Data........................................................................................................ 20
8.1 TORRIX in version 5.5 from device number 30000..................................................................20

Contents II
8.2 Floats ........................................................................................................................................................22
9List of Figures .........................................................................................................23
10 Annex........................................................................................................................24
10.1 EU Declaration of Conformity .........................................................................................................24
10.2 EU-Type Examination Certificate....................................................................................................25
10.3 Instructions.............................................................................................................................................33
10.4 SIL 2 Certificate.....................................................................................................................................40
10.5 SIL 2 Safety Manual.............................................................................................................................44
10.6 Petroleum & Explosives Safety Organisation (PESO) Approval..........................................49
© Copyright:
Reproduction and translation are permitted solely with the written consent of the FAFNIR GmbH. The FAFNIR GmbH
reserves the right to carry out product alterations without prior notice.

Page 1/50 Characteristics
1Characteristics
The TORRIX is a high-precision level sensor for continuous level and interface measurement
of liquids in containers. The measuring principle of the sensor uses the physical effect of the
magnetostriction and is largely unaffected by the temperature. This method is particularly
ideal where level measurement is required to be extremely accurate, such as in the chemical
industry.
This documentation describes the TORRIX in version 5.5 with a cable connection on the side
of the probe head (available from device number 30,000). The cable connection is an
M16 x 1.5 cable connection, an M12 male connector, or an M20 resp. ½ inch NPT female
thread.
Another version is the TORRIX M12 with an M12 connector on the probe head cover, see:
Technical documentation TORRIX M12, art. no. 350164
The TORRIX supplies a 4 … 20 mA output signal that is configured using buttons in the probe
head, or supplies a digital output signal as HART®protocol. Probe lengths are possible from
100 mm to 6 m, as Flex version up to 22 m, as well as versions for different temperature and
pressure ranges.
It also comes in the following versions:
•TORRIX (with screw-in unit for stepless positioning)
•TORRIX Flange (welded to flange)
•TORRIX Flex (with flexible probe tube)
•TORRIX Bypass (for installation on a bypass with magnetic float)
•TORRIX 90 (with 90° angled probe head)
•TORRIX 6 (with 6 mm probe tube)
•TORRIX 6B (with 6 mm probe tube and short cable gland)
For the description of the communication with the HART®protocol, see:
Technical documentation TORRIX Hart, art. no. 207095
For the installation of the TORRIX Flex probe, see:
TORRIX Flex Installation Guide multilingual, art. no. 350118
The TORRIX Sensors can also be supplied in Ex version:
The TORRIX Ex … level sensor with Ex approval (ATEX, IECEx) can be installed in potentially
explosive areas which require protection level Ga (Ex Zone 0), Ga/Gb (Ex Zone 0/1) or Gb (Ex
Zone 1) for electrical equipment.

Safety Instructions Page 2/50
2Safety Instructions
The TORRIX is used for level and interface measurement of liquids in containers. Only use
the sensor for this purpose. The manufacturer accepts no liability for any form of damage
resulting from improper use. Observe and follow all safety notes and the operating instruc-
tions.
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. Observe the following safety instructions:
•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 only be carried out
by expert personnel. Specialised knowledge must be acquired by regular training.
•Operators, installers and service technicians must comply with all applicable safety
regulations. This also applies to any local safety and accident prevention regula-
tions which are not stated in this guide.
Special instructions are indicated in this manual with the following symbols:
If these safety instructions are not observed, it may result in the risk of accident
or damages.
Useful information which ensures continued and correct operation of the
equipment and makes your work easier.
REACH Regulation
The TORRIX sensors contain a lead-titanium-zirconium-oxide, which belongs to
the substances of very high concern (SVHC) according to Regulation (EG) No.
1907/2006 (REACH). A corresponding note can be found on our website at:
www.fafnir.com.

Page 3/50 Design and Function
3Design and Function
The level sensors consist of a probe head (1) and a probe tube (4) made of stainless steel.
On the probe tube is a screw-in unit (3) (cutting ring fitting or ferrule fitting) for height-
adjustable mounting in the container or a flange for fixed installation or the probe tube is
mounted outside the container on a Bypass. A float (5) moves on the probe tube or in the
Bypass for continuous measurement of the product fill level and optionally another float (6)
for a continuous interface measurement.
Figure 1: How the magnetostrictive measuring principle works
The sensor operates according to the magnetostrictive measuring principle. The probe tube
contains a wire (7) made of magnetostrictive material. The sensor electronics (2) transmit
pulses through the wire, which generate a circular magnetic field (8). Permanent magnets
(9) are used as filling level sensors which are installed in both the product float (5) and the
interface float (6). The magnetic field of the float magnets (9) axially magnetises the wire in
this area. The superposition of the two magnetic fields produces a torsional wave (10) at the
float position, which then propagates along the wire in both directions. One torsion pulse
runs directly to the probe head and the other one is reflected at the bottom end of the
probe tube. The time between the current pulse being transmitted and the two torsion
pulses arriving at the probe head is measured and the float position calculated. The position
of the interface float is calculated by measuring a second pulse.
1 – Probe head
2 – Sensor electronics
3 – Screw-in unit
4 – Probe tube
5 – Product float
6 – Interface float
7 – Magnetostrictive wire
8 – Circular magnetic field
9 – Permanent magnet
10 – Torsion pulse
①
②
③
④
⑤
⑥
⑦
⑧
⑩
⑨
⑩

Design and Function Page 4/50
3.1 TORRIX Types
TORRIX (with screw-in unit) TORRIX Flange TORRIX Bypass
Figure 2: TORRIX Types
The TORRIX Bypass type is supplied without process connection or float.
∅
47
∅47
∅47
Probe head
Probe head
Probe tube
∅12
Probe tube
∅12
Screw-in
unit
Neck tube
Flange
Earth
connection
Earth
connection
Cable
gland
Float
Adjusting
ring
Cable
gland
Probe length
Installation length
Probe length
109
109
112.5
Float
Adjusting
ring
88

Page 5/50 Mounting
4Mounting
This section describes how to install the level sensor depending on the type of the device
(see the following figures).
For the installation and maintenance of the sensors, all national Regulations as
well as the generally accepted rules of engineering and this manual must be
observed.
This also applies to any local safety and accident prevention regulations which
are not stated in this manual.
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 containers from underneath. When in-
stalled without centring or guidance, the maximum length of the level sensor is
2 m.
If the float is removed during assembly, it must be pushed back onto the
probe tube with the “TOP” marking oriented towards the probe head so that
a correct measurement can be made.

Mounting Page 6/50
4.1 Mounting with screw-in unit
Figure 3: Mounting with screw-in unit
Dismantling the floats is only necessary if the floats do not fit through the
mounting hole in the tank. Otherwise, follow steps 4, 7 and, if necessary, 8.
Insert the level sensor into the tank (see Figure 3):
(1) Loosen the threaded pins from the adjusting ring (6) and remove the adjusting ring
(2) Remove the float (5) from the probe tube (4)
(3) If necessary, slide the screw-in unit (1) on the probe tube
(4) Insert the level sensor into the tank, provide the screw-in thread (3) with a suitable
sealing material, screw it in and tighten
(5) Slide the float (5) back onto the probe tube (4)
For correct measurement, the floats must be pushed onto the probe tube with
the “TOP” marking oriented towards the probe head.
(6) Push on the adjusting ring (6), position the threaded pins over the groove and
tighten
(7) Adjust the height of the process connection, grease the union nut (2) with Gliss
Lubricant 5GP or a similar grease paste for pre-assembly of stainless steel cutting
rings and fix it finger-tight by hand
(8) Fix the union nut (2) with a wrench by a 1¼ clockwise turn (see following figure)
Figure4: Tightening the compression fitting
6
5
4
3
2
1 – Screw-in unit
2 – Union nut
3 – Screw-in thread
4 – Probe tube
5 – Float
6 – Adjusting ring
1

Page 7/50 Mounting
4.2 Mounting with flange
Because of the risk of bending, the TORRIX Flange must not be held by the probe
tube.
The bolts or nuts and the seals are the responsibility of the operating company
and must be selected depending on the fluid.
The probe tube is firmly welded to the flange, so the installation length cannot be changed.
(1) Fasten flange and seal with the flange bolts and nuts.
(2) If the float does not fit through the installation opening, see chapter “Mounting
with screw-in unit“.
4.3 Mounting with Bypass
The level sensor is mounted at the side of the bypass tube using suitable non-magnetic
fasteners.
To ensure reliable gauging, the probe tube must be fitted with no deformation
on the outside.
The distance between the probe and bypass tubes must be as small as possible.
Only floats approved by FAFNIR can be used.

Mounting Page 8/50
Figure 5: Installation on the bypass
montiert (unverformt)
Magnetposition
min.
max.
Magnetposition
Magnetposition
Bypassrohr
TORRIX Bypass
Sondenrohr spannungsfrei
Bypass-Schwimmer
70 min. Messbereich
Schwimmermitte: max. Abstand
abhängig vom Bypass-Schwimmer
Abstand Sondenrohr zu
50 min.
Sondenlänge
AA
SCHNITT A-A
Abstandshalter
Sondenbefestigung
(unmagnetisch)
Distance between probe tube
and float centre:
max. distance depends on the bypass float
Bypass float
Probe tube tension-
free
mounted (undeformed)
Bypass tube
Magnet position
Spacer
Probe mounting
(non-magnetic)
Probe length
max.
Magnet position
min.
Magnet position
Measuring range
Section A-A
TORRIX Bypass

Page 9/50 Electrical connection
5Electrical connection
The electrical connection is made on the side of the probe head via an M16 x 1.5 cable
connection, an M12 connector, or an M20 resp. ½ inch NPT internal thread.
The earth connector on the probe head can be used for earthing the probe or for equipo-
tential bonding.
The earthing or equipotential bonding must be carried out by the installer in
accordance with the respective national installation regulations.
Protect the probe head against the ingress of water. A secure sealing must be
guaranteed. Make sure that the cable glands and the probe head cover are
screwed tight.
For TORRIX Ex… versions, the technical data of the EU-Type Examination Cer-
tificate and the instructions must be observed (see appendix).
In the intrinsically safe version, the TORRIX Ex level sensor may be connected in
potentially explosive atmospheres only to associated equipment that have been
certified by a recognised inspection authority.
If the level sensor is used in a potentially explosive atmospheres, the permissible
external capacitance (Co ) and inductance (Lo ) of the associated equipment must
not be exceeded, see electrical data of the equipment.
The connecting cable to the associated apparatus must be marked if used in
potentially explosive atmosphere, preferably as blue cable for intrinsically safe
electric circuits.

Electrical connection Page 10/50
5.1 Connection Diagrams
5.1.1 Wiring diagram TORRIX
The level sensor without Ex approval is installed according to the following wiring diagram:
Figure 6: Wiring diagram TORRIX
Power supply: Umax = 50 VDC
Minimum supply voltage: Umin = 8 VDC
Maximum current consumption: Imax = 21.5 mA
5.1.2 Wiring diagram TORRIX Ex
The level sensor with Ex approval is installed in a potentially explosive atmosphere
according to the following wiring diagram:
Figure 7: Wiring diagram TORRIX Ex
Power supply: Umax = 30 VDC
Minimum supply voltage: Umin = 8 VDC
Maximum current consumption: Imax = 21.5 mA
+
+
_
Y
I
R1
R2
R3
U
TORRIX
Spannungsquelle
Leitungswiderstände
Bürde
U= 30 V
max
U = 8 V
min
Y
I
+
-
R1
R2
TORRIX (Ex-Ausführung)
Leitungswiderstände
Trennverstärker (Beispiel)
Hilfsenergie
4...20 mA
+
-
4...20 mA
8...30 V
Line resistances
Load
Isolating amplifier (example)
Line resistances
Power Supply
(Ex version)
Power supply
U
max
= 50 VDC
Umin = 8 VDC
8 … 50 VDC
4 … 20 mA
8 … 30 VDC
4 … 20 mA

Page 11/50 Electrical connection
5.2 Length of the connection cable (TORRIX 4 … 20 mA variants)
The cable (length and cross-section) must be chosen so that the supply voltage
will not fall below the sensor-specific minimum voltage (Umin) for the level
sensor in the case of the highest current consumption (Imax).
The maximum resistance (supply voltage ÷ maximum current consumption) consisting of
the cable resistances and the load of connected devices must not be exceeded. The maxi-
mum cable length is calculated as follows:
L = cable length [m]
U = supply voltage [VDC] minus tolerance value (e.g. ±5 %)
Umin = minimum supply voltage at the level sensor [VDC]
Imax = maximum current consumption [A]
RB= maximum load resistance [Ω]
RA= cable resistance per m [Ω/m] at cable cross-section A [mm²]
Cable length L
L = (((U – Umin) / Imax) –RB) / RA
The following table shows the cable resistance RAper m copper cable of different cross-
sections:
Cable cross-section A [mm²]
Cable resistance RAper m copper cable [Ω/m]
0.5
0.0356
1.0
0.0178
Example calculation for determining the cable length:
Supply voltage U = 12 VDC – 5 % = 11.4 VDC
Minimum supply voltage at the level sensor Umin = 8 VDC
Maximum current consumption Imax = 21.5 mA
Maximum load RB = 86.8 Ω
Cable resistance RA= 0.0356 Ω/m with cable cross-section A = 0.5 mm²
L = (((11.4 – 8) / 0.0215) -86.8) / 0.0356 = 2000 m
A copper cable (2-core) can theoretically be up to 1000 m long with the parameters of this
example.

Electrical connection Page 12/50
5.3 Wiring
The level sensors may only be wired with the power disconnected.
5.3.1 Cable gland
The connection terminals and adjustment buttons are located inside the probe head of the
level sensor and protected by the cover.
For the wiring of the level sensor, proceed as follows:
(1) Unscrew probe head cover (1) using an open-ended spanner.
(2) Loosen union nut (2) of screwed cable gland (3).
Figure 8: Wiring
(3) Feed the two-core cable (4) into the union nut (2) and tighten the nut.
The cable must have an outside diameter of 4 to 8 mm.
(4) Remove screw terminal (5).
(5) Connect the two-core cable (4) to the (+) and (–) marked pols of the screw terminal (5).
(6) Plug the screw terminal (5) back on. Use only the two middle pins as slot (red
arrows in Fig. 9). The cable must have no traction!
Figure 9: Removable screw terminal
(7) If necessary, set reference points (see chapter 6.1).
(8) Screw probe head cover (1) back on.
1
3
2
4
5
5
5

Page 13/50 Electrical connection
5.3.2 M12 Connection
•If not already connected, plug the M12 female connector of the FAFNIR connection
cable onto the M12 male connector of the probe head. First tighten the union nut
of the M12 female connector by hand and then fix the nut with an open-ended
spanner by a 180° turn. The tightening torque should be between 100 … 150 Ncm.
•Connect the cable coming from the central unit with the FAFNIR connection cable,
for example using an installation sleeve, in the following pin assignment:
Signal Colour coding
of the FAFNIR
cable
Pin assignment of
the M12 female
connector
Voltage
+
brown
Pin 1
used internally
white
Pin 2
Voltage – blue Pin 3
used internally
black
Pin 4
Pin assignment of the M12 female connector of the FAFNIR connection cable
The connection cable between the TORRIX … and the associated equipment must have the
following properties:
•2-wire unshielded cable
•For Ex applications colour blue or marked blue (cable for intrinsically safe power
circuits)
Pin 4
Pin 1
Pin 2
Pin 3

Adjustment Page 14/50
6Adjustment
The adjustment settings described below can also easily be done remotely for
versions with HART®protocol without the probe head having to be opened.
6.1 Measuring span of the level sensor
6.1.1 Adjustment of the measuring span on the TORRIX
The adjustment of the 4 mA and 20 mA measuring points on the TORRIX level sensor can
be done with a green (2) and a red (3) button and the green LED (light emitting diode) in
the terminal housing of the probe head.
By default, the level sensor (probe length minus 100 mm) is set to a maximum measuring
span with 4 mA at the probe foot and 20 mA at the probe head. The measuring span can be
changed according to the tank concerned. However, a minimum clearance of 10 mm must
be observed.
If this minimum clearance is not observed, the display direction of the level sensor will be
reversed automatically (ullage measurement).
By adjustment, it is also possible to output the measured value inverted: e.g. the level sen-
sor can be set to maximum measuring span with 4 mA at the probe head and 20 mA at the
sensor base.
Figure 10: Terminal housing of the probe head
(1) Unscrew probe head cover (1) using an open-ended spanner.
(2) Press and hold green button (2) or red button (3) for at least 3 seconds. The green
LED (4) begins to flash.
(3) The level sensor is now in configuration mode. The current consumption of the level
sensor is 12 mA. If no button is pressed again, the level sensor remains in configu-
ration mode for 20 seconds before reverting to measuring mode and discarding
any changes. The 4 mA and 20 mA reference point can be modified in the configu-
ration mode in any order.
1
1. Probe head cover
2. 4 mA button (green)
3. 20 mA button (red)
4. Cal/Err LED (green)
4
2
3

Page 15/50 Adjustment
(4) To define a reference point:
−Move the float to the desired reference point
−Briefly (0.1 to 2 seconds) press the green button (2) to define a current consump-
tion of 4 mA at this position
−Briefly (0.1 to 2 seconds) press the red button (3) to define a current consumption
of 20 mA at this position
After pressing the green button, the LED goes out for 5 seconds, after pressing the red
button, the LED lights up permanently for 5 seconds.
The sensor then remains in configuration mode for another 15 seconds before saving the
change and reverting to the measuring mode automatically.
The adjustment is only saved when the level sensor automatically changes from
configuration mode to measuring mode and the LED goes out. The adjustment
remains unchanged, even if the level sensor is disconnected from the power
supply.
For bypass sensors with “dry” settings, you need a magnetic system with
spacer bracket from the manufacturer of the bypass. Configuration can then
be carried out even with the sensor removed.

Adjustment Page 16/50
6.1.2 Adjustment of the measuring span with the PC
The TORRIX can be adjusted with the TORRIX Configuration Tool on a PC, see technical
documentation:
TORRIX Configuration Tool, art. no. 350258
The configuration with the PC must only be done outside the potentially explo-
sive area.
To connect the TORRIX to the PC, the FAFNIR USB adapter [TORRIX] and the M12 adapter
are required (item no. 900223):
(1) Unscrew probe head cover (1) using an open-ended spanner
(2) Attach the M12 adapter to the 4-way terminal of the TORRIX
(3) Connect the plug of the M12 adapter to the FAFNIR USB adapter
(4) Connect the FAFNIR USB Adapter with the PC
Figure 11: Connection of the M12 adapter
For further information see the technical documentation:
FAFNIR USB adapter, art. no. 350000
No M12 adapter is required for TORRIX with M12 connector.
The FAFNIR USB adapter is plugged directly onto the M12 connector.

Page 17/50 Adjustment
6.2 Current consumption in 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 the failure mode after a short time.
Failure mode signalling conforms to the NAMUR NE43 recommendation. The failure cur-
rent is set by default to 21.5 mA but this value can also be set to 3.6 mA.
6.2.1 Adjustment of the current consumption on the TORRIX
To configure the current consumption in failure mode (see Figure 10).
(1) Unscrew probe head cap (1) using an open-ended spanner.
(2) Press and hold both the “4 mA” (2) and “20 mA” (3) simultaneously for at least 3
seconds.
Green LED (4) “Cal/Err” flashes rapidly. The current consumption of the level sen-
sor is 16 mA. After 5 seconds, the LED stops flashing and indicates the selected
failure current consumption for 2.5 seconds. If the LED is on permanently, Ifailure is
21.5 mA, if the LED turns off, Ifailure is 3.6 mA.
If no button is pressed again, the level sensor remains in failure mode for a further
2.5 seconds before reverting to measuring mode and discarding any changes.
(3) To set a current consumption
−of 3.6 mA during the dwell time (10 sec) in the failure mode, briefly press the "4
mA" (2) button (0.1 … 2 seconds).
−of 21.5 mA during the dwell time (10 sec) in the failure mode, briefly press the "20
mA" (3) button (0.1 … 2 seconds).
The adjustment is only saved when the level sensor automatically changes from
configuration mode to measuring mode and the LED goes out. The adjustment
remains unchanged, even if the level sensor is disconnected from the power
supply.
(4) Screw on the probe head cover (1) again.
If, during operation, the level sensor detects that the level cannot be output
correctly due to an insufficient supply voltage, it enters the failure mode and
sets the current consumption to 3.6 mA (regardless of the failure current set-
tings).