fafnir VISY-Density Guide

Technical Documentation
FAFNIR GmbH • Schnackenburgallee 149 c • 22525 Hamburg • Germany • T.: +49 / 40 / 39 82 07-0 • F.: +49 / 40 / 390 63 39
VISY-X
VISY-Density
Version: 3
Edition:
2020-05
Art. no.: 350213

I Table of Contents
Table of contents
1Introduction...............................................................................................................1
1.1 In this manual … .....................................................................................................................................1
1.2 Safety instructions ................................................................................................................................. 2
2VISY-Density and VISY-Density LPG................................................................... 3
2.1 Design and construction ..................................................................................................................... 3
3Installation ................................................................................................................ 4
3.1 Scope of delivery....................................................................................................................................4
3.2 Assembly...................................................................................................................................................5
3.2.1 VISY-Density with VISY-Stick Advanced........................................................................................ 5
3.2.2 VISY-Density with VISY-Stick Flex.................................................................................................... 6
3.3 Installation................................................................................................................................................7
4Retrofitting the VISY-Density module ............................................................... 8
4.1 Included parts of the VISY-Density extension set...................................................................... 8
4.2 Prerequisites ............................................................................................................................................8
4.3 Removal of existing VISY-Stick level sensors .............................................................................. 8
4.4 Mounting of the VISY-Density module ......................................................................................... 9
4.5 Configuration of the VISY-Stick level sensor .............................................................................10
4.6 Installation of the VISY-Stick level sensor...................................................................................11
5Maintenance ............................................................................................................12
5.1 Servicing..................................................................................................................................................12
5.2 Return shipment...................................................................................................................................12
6Technical Data.........................................................................................................12
6.1 Technical information.........................................................................................................................12
© Copyright:
Re
production and translation are permitted only with the written consent of the FAFNIR GmbH. The FAFNIR GmbH
reserves the right to make product alterations without prior notice.

Table of contents II

Page 1/12 Introduction
1Introduction
The VISY-Density module is an extension of the level sensors VISY-Stick Advanced / Flex
for measuring the product / sump or in the LPG version for measuring the product density
of liquefied petroleum gas (LPG).
The VISY-X system (Volumen Information SYstem) provides highly precise and continuous
level measurements for all commercially available fuels including LPG in up to 16 tanks.
Simultaneously, the product temperature and water level can be measured.
The VISY-X system comprises:
•VISY-Command (central unit)
•VISY-Setup (software for configuring the VISY-Command)
•VISY-Stick (level sensors) as well as other environmental sensors
VISY-Stick Advanced level sensors can be installed in fuel tanks in two versions: via a
screw-in unit with external thread or via the pipe installation (riser).
VISY-Stick Advanced LPG and VISY-Stick Flex can only be installed with a screw-in unit.
The level sensors have to be connected with the VISY-Command central unit installed
inside the petrol station building. VISY-Command collects the data from the level sensors
and transmits them to a higher-level system (e.g. POS) on request.
1.1 In this manual …
… you will be guided through the installation, retrofitting and commissioning of the VISY-
Density module.
Please also observe the additional instructions in following manuals:
Technical documentation VISY-Command VI-4, art. no. 207184
Technical Documentation VISY-Stick and VISY-Reed, art. no. 207194

Introduction Page 2/12
1.2 Safety instructions
The VISY-X system is optimised for use in petrol stations and can be used for all commer-
cially available fuels and liquefied petroleum gas. It serves to measure and evaluate the
filling levels in tanks. Use the system 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 safety instructions in this user guide 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 guide you should observe, appear in italics
and are identified by this symbol.
The following safety precautions must be observed to reduce risk of injury, electric shocks,
fire or damage to the equipment:
Only use original parts. These comply with the technical requirements speci-
fied by the manufacturer.
Installation and maintenance of the VISY-X system and its components may
only be carried out by trained service technicians.
Do not change or modify the system or add any equipment without the prior
consent of the manufacturer.
For the installation and maintenance of the level sensors, the requirements of
the Industrial Health and Safety Regulations and the Equipment Safety Regu-
lations as well as generally accepted rules of engineering and these
instructions must be observed.
Observe also the local safety and accident prevention regulations, which are
not stated in these instructions.
All installation and maintenance work, with the exception of functional testing,
must be carried out with the power disconnected.

Page 3/12 VISY-Density and VISY-Density LPG
2VISY-Density and VISY-Density LPG
The VISY-Density module is available for use in fuel tanks as "VISY-Density" and for use in
LPG tanks as "VISY-Density LPG".
2.1 Design and construction
VISY-Density and VISY-Density LPG differ in the module length and the measuring range
(see chapter 6 Technical Data):
VISY-Density
VISY-Density LPG
Measuring range [g / l]
660 … 900
440 … 660
Dimensions (DxH) [mm]
Ø 50 x 129
Ø 50 x 143
Depending on the position of the VISY-Density module on the probe tube, either the
product density or the sump density is determined, see Figure 1.
With the VISY-Density LPG module, only the product density of liquid gas is determined.
It should be fixed at the lower end of the probe tube.
Figure 1: VISY-Density and VISY-Density LPG
Module length
∅50
2 Set screws
VISY-Density
module
3 transport
locks
Probe tube
Water float
(option)
Circlip
Distance < 190 mm for sump density
Distance > 215 mm for product density
VISY-Density Position of VISY-Density VISY-Density LPG

Installation Page 4/12
3Installation
All installation and maintenance work, with the exception of functional testing,
must be carried out with the power disconnected.
The VISY-Density module is factory calibrated to an associated VISY-Stick level
sensor. If the module is retrofitted, the calibration data of the level sensor must
be updated, see chapter "Retrofitting".
To operate the VISY-Density module, in VISY-Command an 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 3 numbers appearing one after the
other (e.g. 4
 0  6) on the 7-segment display show the version.
If the firmware is below 4.06, please contact our technical support.
After installation of the level sensor, the VISY-Command central unit must be
configured with the VISY-Setup software application.
3.1 Scope of delivery
VISY-Density and optional additional floats are supplied in a box separated from the level
sensor. It must be mounted on the probe tube of the level sensor on site.
The module and probe are
clearly numbered for the
appropriate assignment,
e.g module 1 belongs to
probe 1, etc.
In case of retrofitting, only
the VISY-Density module
with mounting accessories
will be sent, see chapter 4.1.

Page 5/12 Installation
3.2 Assembly
During the assembly, it is important to make sure that the probe tube is not
bent. Protect the floats from knocks at all times. Humidity must not enter the
M12 connector.
The VISY-Density module must be mounted on the probe tube on site.
3.2.1 VISY-Density with VISY-Stick Advanced
1st Pull the VISY-Stick Advanced probe out of the packaging tube
2nd Remove transport locks and rubber bands
3rd Slide the LPG or product float with the TOP marking in the direction of the probe
head onto the probe tube
4th With the VISY-Stick Advanced, slide the spacer onto the probe tube
5th Slide the VISY-Density module with the designation in direction of the probe head
onto the probe tube
6th Slide the water float (option) with the top marking in the direction of the probe
head onto the probe tube
7th Attach the circlip and the plastic safety ring with a circlip pliers at the end of the
probe tube
8th Depending on the application, fix VISY-Density at the appropriate height of the
probe tube with 2 setscrews (see Figure 1: VISY-Density and VISY-Density LPG:
8th a) To measure the sump density: Distance between the end of the probe tube and
the upper edge of the VISY-Density module is less than 190 mm
8th b) To measure the product density: Distance between the end of the probe tube
and the upper edge of the VISY-Density module is more than 215 mm
Transport locking
VISY-Density /
VISY-Density LPG
Product float /
LPG float
Circlip
Carton lid
Carton lid
Probe head
Packaging tube
Probe tube

Installation Page 6/12
8th c) For VISY-Density LPG: mount the module at the lower end of the probe tube
9th Remove the transport locks (3 plastic plugs inserted laterally) from the VISY-
Density Module
3.2.2 VISY-Density with VISY-Stick Flex
VISY-Stick Flex must not be bent during assembly apart from the straightening
when installed in the tank. Protect the floats from knocks at all times. Humidity
must not enter the M12 connector.
1st Lift the VISY-Stick Flex probe out of the box
2nd Remove transport locks and rubber bands
3rd Use an Allen key to loosen the weight from the end of the probe tube and remove it
4th If installed, remove the water float from the probe tube
5th Slide the VISY-Density module with the designation in direction of the probe head
onto the probe tube
6th Push the water float (option) with the top marking onto the probe tube in the di-
rection of the probe head

Page 7/12 Installation
7th Slide the weight onto the probe tube
8th Using an Allen key, turn the setscrews of the weight in the groove of the probe
tube until the stop is reached.
9th Depending on the application, fix VISY-Density at the appropriate height of the
probe tube with the 2 setscrews (see Figure 1: VISY-Density and VISY-Density LPG:
9th a) To measure the sump density: Distance between the end of the probe tube and
the upper edge of the VISY-Density module is less than 190 mm
9th b) To measure the product density: Distance between the end of the probe tube
and the upper edge of the VISY-Density module is more than 215 mm
The VISY-Density module must not be fixed to the corrugated hose of the
VISY-Stick Flex probe.
10th Remove the transport locks (3 plastic plugs inserted laterally) from the VISY-
Density Module
3.3 Installation
The installation of the level sensors must be carried out only with the power
disconnected.
Before installation, move the floats down as far as possible on the probe tube
to prevent them from falling and being damaged when the probe is erected.
For installation in LPG tanks all corresponding safety precautions must be
observed. The LPG tank must be properly emptied before installing the VISY-
Density LPG module.
The transport lock of the VISY-Density module (3 plastic plugs inserted laterally)
must be removed before installation.
For installation of the VISY-Stick level sensors see:
Technical Documentation VISY-Stick and VISY-Reed, art. no. 207194

Retrofitting the VISY-Density module Page 8/12
4Retrofitting the VISY-Density module
An existing VISY-Stick Advanced, VISY-Stick Advanced LPG, or VISY-Stick Flex level sensor
can be retrofitted with a VISY-Density module. The level sensor must be updated on-site
with the calibration data of the VISY-Density module with the aid of a PC/laptop.
The VISY-Density module can only be operated with VISY-Stick Advanced
probes from device number 40,000.
The VISY-Density module can only be operated with VISY-Stick Flex probes
which are updated with a special firmware. Please contact our technical sup-
port.
The FAFNIR USB adapter (item no.900040) is required for retrofitting the VISY-
Density module and for firmware updates, see installation instruction: FAFNIR
USB adapter, art. no. 350000
During the assembly, it is important to make sure that the probe tube is not
bent. Protect the floats from knocks at all times. Humidity must not enter the
M12 connector.
4.1 Included parts of the VISY-Density extension set
When you order the VISY-Density extension set, you will receive the following components:
•VISY-Density or VISY-Density LPG
•Circlip and plastic safety ring
•Spacer for VISY-Stick Advanced
•Calibration data
4.2 Prerequisites
•VISY-Density configuration software
•Circlip pliers
•Hexagon (Allen) key for M4 setscrew (2 mm)
4.3 Removal of existing VISY-Stick level sensors
All installation and maintenance work, with the exception of functional testing,
must be carried out with the power disconnected.
For installation in LPG tanks all corresponding safety precautions must be
observed. The LPG tank must be properly emptied before removing or in-
stalling a level sensor.

Page 9/12 Retrofitting the VISY-Density module
For the removal of the level sensor, see also:
Technical Documentation VISY-Stick and VISY-Reed, art. no. 207194
1st Disconnect the power supply of the VISY-Command
2nd Remove the equipotential cable and M12 connector from the probe head
3rd Write down the sensor number and tank number (assignment for the installation)
4th If available, unscrew the screw-in unit from the thread of the tank without loosen-
ing the probe tube from the screw-in unit, otherwise a new adjustment of the
probe will be required
5th Carefully pull the probe out of the tank or the riser of the tank and …
5th a) VISY-Stick Advanced: … place it on a clean surface
5th b) VISY-Stick Flex: … carefully roll it up
6th Loosen and remove from the end of the probe tube …
6th a) VISY-Stick Advanced: … the circlip and the plastic safety ring using a circlip pliers
6th b) VISY-Stick Flex: … the weight using an Allan key
7th If installed, remove the water float from the probe tube
4.4 Mounting of the VISY-Density module
1st Slide the VISY-Density with the designation in direction of the probe head onto
the probe tube
2nd Slide the water float (option) with the top marking in the direction of the probe
head onto the probe tube
3rd Attach the circlip and the plastic safety ring with a circlip pliers at the end of the
probe tube
4th Depending on the application, fix VISY-Density at the appropriate height of the
probe tube with 2 setscrews (see Figure 1: VISY-Density and VISY-Density LPG:
4th a) To measure the sump density: Distance between the end of the probe tube and
the upper edge of the VISY-Density module is less than 190 mm
4th b) To measure the product density: Distance between the end of the probe tube
and the upper edge of the VISY-Density module is more than 215 mm
4th c) For VISY-Density LPG: mount the module at the lower end of the probe tube
The VISY-Density module must not be fixed to the corrugated hose of the
VISY-Stick Flex probe.
5th Remove the transport locks (3 plastic plugs inserted laterally) from the VISY-
Density Module

Retrofitting the VISY-Density module Page 10/12
4.5 Configuration of the VISY-Stick level sensor
The level sensor must not be programmed in the installed state or in the
potentially explosive environment.
1st Plug the FAFNIR USB adapter into a free USB port on the PC (the PC must have
Internet connection to install the drivers), see also:
FAFNIR USB adapter, art. no. 350000
2nd Plug the M12 connector of the FAFNIR USB adapter into the probe head
3rd Install and start the VISY-Density configuration software on the PC / laptop
4th Entering the calibration data in the configuration program:
- Serial number : automatically read by the configuration program
- VN: … Default value
- SN Module: … (See calibration data)
- Par. A0: … (See calibration data)
- Par. A1: … (See calibration data)
- Par. A2: … (See calibration data)
- CRC16: … (See calibration data)
The calibration data of the VISY-Density module are included in the scope of de-
livery.
5th Press the button "Write Density Configuration” to save the values
6th Remove the M12 connector of the FAFNIR USB adapter from the probe head
7th Plug the M12 connector of the VISY-Command in the probe head
8th Connect the power supply of the VISY-Command
9th Setting the level alarm in VISY-Command:
−Connect the VISY-Command with the PC / laptop and start the VISY-Setup
software application
−Move the product float on the probe tube directly to the VISY-Density module

Page 11/12 Retrofitting the VISY-Density module
−In the VISY-Setup menu "current measured values -> product height in mm”,
read out the product height (corresponds to the product float position)
−Set the low alarm threshold to a value slightly higher than this product height
4.6 Installation of the VISY-Stick level sensor
The installation of the level sensors must be carried out only with the power
disconnected.
For installation in LPG tanks all corresponding safety precautions must be
observed. The LPG tank must be properly emptied before installing the VISY-
Density LPG module.
Before installation, move the floats down as far as possible on the probe tube
to prevent them from falling and being damaged when the probe is erected.
The transport lock of the VISY-Density module (3 plastic plugs inserted laterally)
must be removed before installation.
For installation of the VISY-Stick level sensors see:
Technical Documentation VISY-Stick and VISY-Reed, art. no. 207194

Maintenance Page 12/12
5Maintenance
5.1 Servicing
The level sensors and associated floats are maintenance-free if they are operated accord-
ing to the manufacturer's specifications and not used to measure other media.
5.2 Return shipment
Before returning any FAFNIR equipment, the Return Material Authorization (RMA) from
FAFNIR customer service is required. Please contact your account manager or the custom-
er service to receive the instructions on how to return goods.
The return of FAFNIR equipment is possible only with authorization by the
FAFNIR customer service.
6Technical Data
VISY-Density
VISY-Density LPG
Measuring range [g/l]
660 … 900
440 … 660
Accuracy (VISY-Stick Advanced) [g/l]
< 1.0
Accuracy (VISY-Stick Flex) [g/l]
2.0
Resolution (VISY-Stick Advanced) [g/l]
0.1
Temperature range [°C]
-40 … +85
Dimensions (diameter x height) [mm]
Ø 50 x 129
Ø 50 x 143
Operating pressure [bar]
≤ 16
Material
Stainless steel
6.1 Technical information
•For details on explosion protection, permissible ambient temperature (probe
head), and the connection data please refer to the approvals and operating in-
structions.
•With a battery-powered radio transmitter, all level sensors can be used as wireless
versions.
•All level sensors have protection class IP68 according to EN 60529 (IPX8: Immer-
sion depth of 2 metres for 30 days).
For a detailed list of technical data see:
VISY-Stick VISY-Reed Data, multilingual, art. no. 350105

FAFNIR GmbH
Schnackenburgallee 149 c
22525 Hamburg, Germany
T: +49 / 40 / 39 82 07-0
F: +49 / 40 / 390 63 39
E-mail: [e-mail]
Web: www.fafnir.com