fafnir VISY-Density Guide

Technical Documentation
FAFNIR GmbH • Schnackenburgallee 149 c • 22525 Hamburg, Germany • Tel.: +49 /40 / 39 82 07-0 • Fax: +49 / 40 / 390 63 39
VISY-X
VISY-Density (LPG)
Version: 2
Edition:
2016-08
Art. no.: 350213

I Table of contents
© Copyright:
Reproduction and translation is permitted only with the written consent of the FAFNIR GmbH. The FAFNIR GmbH
reserves the right to carry out product alterations without prior notice.

Table of contents II
Table of contents
1Overview ...................................................................................................1
1.1 In this manual ….............................................................................................................................1
1.2 Requirements for service engineers.......................................................................................2
1.3 Safety instructions.........................................................................................................................2
2VISY-Density (LPG)...................................................................................4
2.1 VISY-Density and VISY-Density LPG ......................................................................................4
3Installation VISY-Stick Advanced (LPG) Density...................................5
3.1 Complete scope of delivery of filling level sensor ...........................................................5
3.2 Assembly and commissioning..................................................................................................6
3.2.1 Assembly of VISY-Density (LPG) ...................................................................................................6
3.2.2 Installation and commissioning of the VISY-Stick Advanced ............................................7
4Retrofitting the VISY-Density (LPG) module ........................................8
4.1 Scope of delivery of module for retrofitting ......................................................................8
4.2 Assembly and commissioning..................................................................................................8
5Overhaul................................................................................................. 13
5.1 Maintenance..................................................................................................................................13
5.2 Return shipment ..........................................................................................................................13
6Technical data........................................................................................ 13
7List of figures......................................................................................... 13
8Annex ..................................................................................................... 14
8.1 EC Declaration of Conformity VISY-Stick and TORRIX .................................................14
8.2 Technical information ................................................................................................................15

Page 1/15 Overview
1Overview
The VISY-Density (LPG) module is an extension of the VISY-Stick Advanced level sensor in
the VISY-X system for the measurement of product/sump density of fuel or liquefied
petroleum gas (LPG). The module is available for use in fuel tanks as "VISY-Density" and
for use in LPG tanks as "VISY-Density LPG".
The VISY-X system (Volume Information System) provides highly precise and continuous
filling level measurements for all commercially available fuels and liquefied petroleum gas
in up to 16 tanks. The product temperature and the water level are gauged simultaneously.
The VISY-X system comprises:
•VISY-Command (evaluation unit)
•VISY-Setup (software for configuring the VISY-Command)
•VISY-Stick (filling level sensors)
•Additional environmental sensors
VISY-Density (LPG) can be used only with the sensor VISY-Stick Advanced from
device number 40,000 onwards.
To operate the VISY-Density (LPG) module, interface VI-4 with firmware 4.06
or higher is required. The firmware version is displayed after the reset button
of the VI-4 is pressed. The first three digits of the 7-segment display show the
versions in succession (e.g. 4 – 0 – 6). For firmware below 4.06 please contact
our service department for an update.
To install the VISY-Stick Advanced probe with the VISY-Density module, there are 2 possi-
bilities:
In fuel tanks the filling level sensor can be installed without any difficulty via a screw-in
unit with external thread and also via the pipe installation (riser).
Installation in LPG tanks is only possible with screw-in units.
The sensors have to be connected with the VISY-Command evaluation unit which is to be
mounted inside the petrol station building. Before operating, the VISY-Command must be
configured using a PC or notebook and the VISY-Setup software application.
The VISY-Command collects data from the sensors and transmits this to a higher-level
system (e.g. POS) on request.
1.1 In this manual …
… you are guided through the installation and commissioning as well as retrofitting of the
VISY-Density module.

Overview Page 2/15
This manual contains a description of all steps needed for the implementation. Please also
observe the additional instructions in the following manuals:
Technical Documentation VISY-Command VI-4, art. no. 207184
Technical Documentation VISY-Stick and VISY-Reed, art. no. 207194
1.2 Requirements for service engineers
The complete VISY-X system should only be installed by trained service engineers.
1.3 Safety instructions
The VISY-X system is optimised for use in petrol stations and is compatible with all com-
mercially available fuels and liquefied petroleum gas. It serves to measure and evaluate the
filling levels in tanks. The system must be used exclusively for this purpose. Observe and
follow all product safety notes and operating instructions. The manufacturer accepts no
liability for any form of damage resulting from improper use.
The level and environmental sensors have been developed, manufactured and tested in
accordance with the latest good engineering practices and generally accepted safety
standards. Nevertheless, hazards may arise from their use.
The following safety precautions must be observed in order to reduce the risk of injury,
electric shocks, fire or damage to the equipment:
•Do not change or modify the system or add any equipment without the
prior consent of the manufacturer.
•Only use original parts. These comply with the technical requirements
specified by the manufacturer.
•The installation, operation and maintenance of the sensors and the VISY-
Command must solely be carried out by expert personnel.
•The product may be powered only via the permissible power supply.
The safety instructions in this manual are marked as follows:
If these safety instructions are not observed, it may result in the risk of acci-
dent or damage to the VISY-X system.
Useful tips and information in this manual that should be observed are written
in italics and identified by this symbol.

Page 3/15 Overview
When installing and servicing the sensors, the requirements of the Explosion
Protection Regulations, the Industrial Health and Safety Regulations and the
Equipment Safety Regulations as well as generally accepted rules of engineer-
ing and these operating instructions must be observed.
Observe also the the local safety and accident prevention regulations which
are not stated in these operating instructions.
All installation and maintenance work, with the exception of function testing,
must be carried out with the power disconnected.
During the assembly, it is important to make sure that the probe tube is not
bent. Protect the floats from knocks at all times. Moisture must not be allowed
to enter the M12 connector.
Before installation move the supplied floats to the bottom end of the probe
tube, otherwise they will slip down suddenly when you erect the sensors and
could be damaged when striking the circlip.
During the installation, following data of the VISY-Stick sensors, tanks, and
products are to be noted for configuring the VISY-Command:
- Device numbers of the sensors,
- Tank assignments of the sensors,
- Tank assignments of the product qualities,
- Terminal assignment of the sensors in the VISY-Command,
- Sensor distances from the central vertical axes of the tank

VISY-Density (LPG) Page 4/15
2VISY-Density (LPG)
The VISY-Density (LPG) module allows the determination of the product density or the
sump density (level below the suction pipe) of commercially available fuels or liquefied
petroleum gas. For fuel tanks the module is available as "VISY-Density" and for LPG tanks
as "VISY-Density LPG“".
2.1 VISY-Density and VISY-Density LPG
VISY-Density and VISY-Density LPG differentiate themselves in the length of their modules
and the measuring range (see Technical data):
VISY-Density
VISY-Density (LPG)
Measuring range
660 … 900 g/l
440 … 660 g/l
Dimensions (DxH)
Ø 50 mm x 129 mm
Ø 50 mm x 143 mm
The set screws are intended for fixing the module, the 3 transport locks must be removed
before operating the VISY-Density.
Figure 1: VISY-Density and VISY-Density LPG module
Module length
∅50
2 Set screws
VISY-Density (LPG) module
3 Transport locks
Probe tube
Water float (option)
Circlip
Distance < 190 mm for sump density
Distance > 210 mm for product density

Page 5/15 Installation VISY-Stick Advanced (LPG) Density
3Installation VISY-Stick Advanced (LPG) Density
The VISY-Density (LPG) module with VISY-Stick Advanced filling level sensor is calibrated
at the factory and can be operated after simple installation.
3.1 Complete scope of delivery of filling level sensor
VISY-Density and, if required, additional floats are supplied in a carton separate from the
VISY-Stick Advanced probe. For the appropriate assignment the module and probe are
numbered, e.g module 1 belongs to probe 1, etc.

Installation VISY-Stick Advanced (LPG) Density Page 6/15
3.2 Assembly and commissioning
3.2.1 Assembly of VISY-Density (LPG)
(1) Pull the VISY-Stick Advanced probe out of the packaging tube
(2) Remove transport locks and rubber bands
(3) Push the LPG or product float with the TOP marking onto the probe tube in the
direction of the sensor head
(4) If available, push the spacer onto the probe tube below the product float
(5) Push the VISY-Density (LPG) module with the sensor designation onto the probe
tube in the direction of the sensor head
(6) Push the water float (option) with the top marking onto the probe tube in the di-
rection of the sensor head
(7) Attach the circlip to the end of the probe tube with circlip pliers
(8) Depending on the application (product density/sump density), fix the VISY-
Density (LPG) on the probe tube at the appropriate height (2 set screws)
VISY-Density must not be fixed on the corrugated hose of the VISY-Stick Flex
probe.
At a smaller distance than 190 mm between the probe tube end and the upper
edge of the VISY-density module, the sump density is determined. At a dis-
tance higher than 210 mm, the product density is determined (see Fig. 1).
(9) Remove the transport locks (3 plastic pins) from the VISY-Density Module
The float of the VISY-Density is protected by a transport lock, which consists of
three lateral inserted plugs. The transport lock must be pulled out before oper-
ating the VISY-Density.
Transport locking
VISY-Density or
VISY-Density LPG
Product or
LPG float
Circlip
Carton lid
Carton lid
Sensor head
Packaging tube
Probe tube

Page 7/15 Installation VISY-Stick Advanced (LPG) Density
3.2.2 Installation and commissioning of the VISY-Stick Advanced
All wiring operations must solely be carried out with the power disconnected.
The relevant safety precautions must be adhered to for the installation in LPG
tanks. The LPG tank must have been properly emptied before the VISY-Density
LPG module is installed.
Depending on the application, 2 options are available for the installation of the VISY-Stick
Advanced probe:
Figure 2: Riser installation and installation with screw-in unit
For installation and commissioning of the VISY-Stick Advanced probe, see:
•Technical Documentation VISY-Stick and VISY-Reed, art. no. 207194
Pipe installation (riser)
for fuel tanks only
Installation with screw-in unit
for fuel tanks and LPG tanks