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.