Honeywell 854 ATG Series User manual

Instruction manual
Series 854 ATG level gauge

Instruction manual 854 ATG Page 1
Instruction manual
series 854 ATG
level gauge
September 2013
Part no. 4416.220
Revision 8
Enraf B.V.
P.O. Box 812
2600 AV Delft
Netherlands
Tel. : [phone]
Fax : [phone]
E-mail : [e-mail]
Website : www.honeywellenraf.com

Page 2
Copyright 1999 - 2013 Enraf B.V. All rights reserved.
Reproduction in any form without the prior consent of Enraf B.V. is not allowed. This manual is for information
only. The contents, descriptions and specifications are subject to change without notice. Enraf B.V. accepts no
responsibility for any errors that may appear in this manual.
The warranty terms and conditions applicable in the country of purchase in respect to Enraf B.V. products are
available from your supplier. Please retain them with your proof of purchase.

Preface
Instruction manual 854 ATG Page 3
Preface
This manual is intended for technicians involved with the commissioning and service of the Honeywell Enraf
series 854 Advanced Technology Gauge.
A description preceding the technical procedures gives the technical information necessary to understand its
functioning. It is recommended to read this description prior to performing any of the procedures.
For mechanical and electrical installation of the 854 ATG, refer to the Installation guide 854 Advanced
Technology Gauge. This manual describes the commissioning, maintenance and trouble shooting of the basic
854 ATG level measurement. Other features such as: level alarm outputs, analog level output, temperature
measurement, pressure measurement, etc. are describes in separate manuals. For an overview, refer to the list
of related documents in Appendix F.
Legal aspects
The information in this manual is copyright property of Enraf B.V., Netherlands.
Enraf B.V. disclaims any responsibility for personal injury or damage to equipment caused by:
•Deviation from any of the prescribed procedures;
•Execution of activities that are not prescribed;
•Negligence of the general safety precautions for handling tools, use of electricity and microwave radiation.
EC declaration of conformity
Refer to the EC declaration of conformity, shipped with the instrument.
Additional information
Please do not hesitate to contact Honeywell Enraf or its representative if you require additional information.

Introduction
Page 4
Table of contents
Preface .......................................................................................................................................................3
1 Introduction....................................................................................................................................................6
1.1 Principle of measurement ...................................................................................................................7
1.1.1 Level measurement ..............................................................................................................7
1.1.2 Interface between two products ............................................................................................7
1.1.3 Relative density.....................................................................................................................8
1.2 Optional functions................................................................................................................................8
1.3 Remote monitoring..............................................................................................................................8
1.4 Approvals (ATEX / IECEx, FM) ...........................................................................................................8
2 Safety.............................................................................................................................................................9
2.1 Safety aspects of the 854 Advanced Technology Gauge....................................................................9
2.2 Personal safety..................................................................................................................................10
2.3 Safety conventions ............................................................................................................................10
3 Commissioning............................................................................................................................................11
3.1 Checks before starting the commissioning .......................................................................................11
3.2 Installation of measuring drum and displacer....................................................................................12
3.2.1 Tools ...................................................................................................................................12
3.2.2 Installation of measuring drum............................................................................................12
3.2.3 Installation of displacer .......................................................................................................13
3.2.4 Unlocking (locking) the motor block....................................................................................13
3.3 Programming (configuring) the gauge...............................................................................................14
3.3.1 Introduction into programming ............................................................................................14
3.3.2 Apply power to the 854 ATG ...............................................................................................16
3.3.3 Selecting dimension and decimal separator .......................................................................17
3.3.4 Tank and gauge data..........................................................................................................18
3.3.5 Alarm settings .....................................................................................................................20
3.3.6 Ullage readout.....................................................................................................................21
3.3.7 Display control and password protection ............................................................................22
3.4 Level calibration ................................................................................................................................23
3.4.1 Standard level calibration....................................................................................................23
3.4.2 Level calibration with a tank top reference stop..................................................................23
3.4.3 Level calibration using the top of ball valve.........................................................................24
3.4.4 Interface measurement.......................................................................................................25
4 Operation.....................................................................................................................................................26
4.1 Display...............................................................................................................................................26
4.1.1 XPU display.........................................................................................................................27
4.1.2 XPU-2 display .....................................................................................................................27
4.2 Repeatability test ...............................................................................................................................29
4.3 Lock test............................................................................................................................................29
4.4 Freeze and block commands ............................................................................................................30
4.5 Unlock ...............................................................................................................................................30
4.6 Interface measurement .....................................................................................................................31
4.7 Dip mode...........................................................................................................................................31
4.8 Servo Auto Test.................................................................................................................................32
4.9 Verify level calibration........................................................................................................................34
4.9.1 Verify level calibration against a tank top reference stop....................................................34
4.9.2 Verify level calibration on top of ball valve ..........................................................................34
4.10Data items and operational commands.............................................................................................35

Introduction
Instruction manual 854 ATG Page 5
5 Maintenance ................................................................................................................................................36
5.1 Preventive maintenance....................................................................................................................36
5.2 Instrument covers..............................................................................................................................37
5.3 Drum compartment ...........................................................................................................................38
5.3.1 Detailed description ............................................................................................................38
5.3.2 Removing the measuring drum...........................................................................................39
5.3.3 Replacing the drum bearings..............................................................................................40
5.4 The electronic compartment..............................................................................................................41
5.4.1 Detailed description ............................................................................................................41
5.4.2 Dismantling the electronic compartment.............................................................................42
5.4.3 Replacing software .............................................................................................................43
5.4.4 Initializing NOVRAM............................................................................................................43
5.5 Calibrating force transducer ..............................................................................................................44
5.6 Synchronizing the reference encoder................................................................................................45
6 Trouble shooting..........................................................................................................................................46
6.1 Problems with displacer movement ..................................................................................................46
6.2 XPU error code (item EP) .................................................................................................................47
6.3 SPU error code (item ES) .................................................................................................................47
6.4 SPU status request (item QS)...........................................................................................................48
Appendix A Article and part numbers.....................................................................................................49
Appendix B Additional information on displacers ...................................................................................52
Appendix C ASCII table..........................................................................................................................54
Appendix D Display formats ...................................................................................................................55
Appendix E PCB layout ..........................................................................................................................60
Appendix F Related documents.............................................................................................................61
Index.........................................................................................................................................................62

Introduction
Page 6
1 Introduction
The Honeywell Enraf 854 ATG (Advanced Technology Gauge) measures the liquid level and can be
programmed to measure two additional interface levels.
The 854 ATG has four programmable level alarms, and also provides diagnostic information. This information
can be displayed on the internal display, the Portable Enraf Terminal (PET) as well as on remote systems.
Optionally, the instrument can be provided with software for density measurement of the stored product.
The 854 ATG can be supplied with an optional board (called: HCU board) to interface optional equipment as:
•Spot temperature element (Pt100 RTD)
•Average temperature element (VITO MTT/LT temperature probe, MRT element, MPT element)
•Water bottom probe (VITO water probe, VITO combi probe or external HART water probe)
•Pressure transmitters (for vapour pressure measurement, HIMS density measurement)
•Analog 4-20 mA level output
The above functions are separately available or in combinations as with the previous MPU, HPU, HSU and
TPU optional boards. Refer to the below table:
Sales code
option board
(4th position)
Available functions
HCU board
Emulation
mode
B Spot temperature Pt100 RTD TPU-2/ HSU
C VITO temperature and/or water probe HPU
J VITO temperature and/or water probe + HART device(s) HPU
U Spot temperature Pt100 RTD + HART device(s) HSU
V Analog level output MPU
W Analog level output + VITO temperature and/or water
probe
HCU
X
Analog level output + VITO temperature probe
MPU
Y Analog level output + Spot temperature Pt100 RTD +
VITO temperature and/or water probe + HART device(s)
HCU
Notes:
1 HART device(s) can be:
•HART pressure transmitters for vapour pressure measurement or HIMS density measurement
•HART water bottom probes.
2 With sales code Y (all HCU functions), the spot temperature measurement
is disabled if a VITO temperature probe is present.

Introduction
Instruction manual 854 ATG Page 7
1.1 Principle of measurement
Figure 1.1 Principle of measurement
The principle is based on detection of variations in the buoyancy of a displacer. The displacer is suspended from
a strong, flexible measuring wire which is stored on a precisely grooved measuring drum.
The shaft of the drum is connected to the stepper motor via a magnetic coupling.
The apparent weight of the displacer is measured by a force transducer. The actual output of the force
transducer is compared with a desired value for the apparent weight of the displacer. If a discrepancy exists
between measured and desired value, an advanced software control module adjusts the position of the stepper
motor.
1.1.1 Level measurement
Alevel variation of product, in which the displacer is partially immersed, causes a change in buoyancy, which will
be detected by the force transducer. The resulting difference between measured and desired value will cause a
variation in the position of the stepper motor and consequently raise or lower the position of the displacer until
the measured value equals the desired value.
To avoid oscillations, a certain hysteresis and integration time is software adjustable. This results in a stable and
accurate averaged level measurement.
The stepper motor turns one revolution for every 10 mm of vertical movement of the displacer.
One revolution is divided into 200 steps, therefore one step is equivalent to 0.05 mm. This resolution is direct
consequence of the stepper motor principle. The correct functioning of the stepper motor is continuously
checked. This is achieved by decoding the unique pattern of an encoder disk mounted on the motor shaft.
1.1.2 Interface between two products
Measurement of the interface between two products is achieved by sending an interface command to the gauge.
This causes the stepper motor processor to move the displacer to a position where the apparent weight of the
displacer matches a pre-programmed set point.

Introduction
Page 8
1.1.3 Relative density
To measure the relative density, the displacer is positioned at specific heights and the apparent weight of the
displacer at each height is measured. Knowing the volume of the displacer, its weight in air, and the measured
apparent weight, the relative density of the product at each position of the displacer can be calculated. The
software for the density measurement is available as an option.
1.2 Optional functions
Optional functions as temperature measurement, pressure measurement, water bottom measurement, HIMS
density measurement and analog level output requires the optional HCU board to be installed.
Alarm relays are optionally available on the SPU II board. Density measurement is an optional module of the
SPU software.
The table below gives an overview of all options and related manuals.
Option Board Refer to
Level alarm output relays
(or digital outputs)
SPU II Instruction manual SPU II Hard alarm output contacts
Density measurement SPU II Instruction manual 854 density option
Analog level output (4-20 mA) HCU Instruction manual Spot temperature and Analog
output options
Spot temperature measurement HCU Instruction manual Spot temperature and Analog
output options
Average temperature measurement
via VITO temperature probe or MRT
HCU Instruction manual VITO
Pressure measurement for mass,
density and/or vapour pressure
measurement
HCU Instruction manual HIMS
Water bottom measurement HCU Instruction manual Temperature, Water bottom and
Analog output options
Connection for 977 TSI
Tank Side Indicator
XPU-2 Instruction manual 977 TSI Tank Side Indicator
RS-232C / RS-485 communication XPU-2 Instruction manual XPU-2 option
RS-232C / RS-485
Foundation Field Bus GFC Instruction manual Foundation
TM
Fieldbus interface
1.3 Remote monitoring
Central monitoring of the 854 ATG is possible via tank inventory systems such as Entis Pro and Entis XS.
Remote display can be achieved by using the 877 FDI field indicator, the 977 TSI tank side indicator or the 878
CPI panel indicator.
1.4 Approvals (ATEX / IECEx, FM)
The Honeywell Enraf 854 Advanced Technology Gauges are certified by official testing institutes as KEMA
(ATEX) and Factory Mutual to be explosion proof (suitable for zone 0). The gauges are also approved and
certified by Weights and Measures (W&M) or Custom and Excise authorities for legal use and custody transfer.

Safety
Instruction manual 854 ATG Page 9
2 Safety
2.1 Safety aspects of the 854 Advanced Technology Gauge
For medium pressure versions (till 6 bar), the 854 ATG drum compartment housing is of aluminum, and for
chemical version it is of stainless steel.
For high pressure version (max. 25 bar), the 854 ATG housing is of stainless steel.
The housing of the 854 ATG is explosion-proof:
•II 1/2 G Ex d IIB T6 Ga/Gb or II 1/2G Ex de IIB T6 Ga/Gb or
II 1/2 G Ex d [ia Ga] IIB T6 Ga/Gb or II 1/2G Ex de [ia Ga] IIB T6 Ga/Gb;
acc. to KEMA 01ATEX2092 X, certified by KEMA, Netherlands
•Ex d [ia Ga] IIB T6 Ga/Gb or Ex de [ia Ga] IIB T6 Ga/Gb; acc. to IECEx KEM 10.0007X, certified by
KEMA, Netherlands
•Class I, Division 1, Groups B, C & D acc. to ANSI/NFPA no. 70, certified by Factory Mutual Research
USA (FM no.: 3Q2A9.AX)
Environmental conditions for the 854 ATG are:
ambient temperature : -40 to + 65 °C (-40 to +149 °F)
operating pressure : max. 6 bar for medium pressure and chemical version
max. 40 bar (25 bar according PED) for high pressure version
relative humidity : 0 - 100 %
ingress protection : IP65 (NEMA 4), suitable for outdoor installation
The drum compartment, which is in contact with the tank atmosphere, is separated from electronic
compartment. A magnetic coupling transfers the drum movement (hence, displacer movement) to electronic
compartment.
Wiring for intrinsically safe options, such as temperature or pressure measurement, is fed via two separate
cable entries.
The 854 ATG covers can optionally be provided with sealing facilities on blocking devices, which prevents
unauthorized opening.
Warning
The 854 ATG is designed to measure the liquid level in storage tanks. The instrument is
suitable for flammable liquids (refer to the explosion proof certification data below).
For other applications contact Honeywell Enraf.
Warning
Do not use the instrument for anything else than its intended purpose.
Warning
Improper installation of cable glands, conduits or stopping plugs
Will invalidate the Ex approval of the 854 ATG.

Safety
Page 10
2.2 Personal safety
Safe execution of the procedures in this manual requires technical experience in handling tools, and
knowledge of safety regulations in handling electrical installation in hazardous environments.
The sequence of steps in a procedure may also be important from the point of view of personal safety and
prevention of damage; it is therefore advised not to change the sequence of procedure steps or modify any
procedure in any other way.
2.3 Safety conventions
"Warnings", "Cautions", and "Notes" have been used throughout this manual to bring special matters to the
immediate attention of the reader.
•A Warning concerns danger to the safety of the technician or user;
•A Caution draws attention to an action which may damage the equipment;
•A Note points out a statement deserving more emphasis than the general text, but does not deserve a
"Warning" or a "Caution".
Warning
In hazardous areas it is compulsory to use personal protection and safety gear such as:
hard hat, fire resistive overall, safety shoes, safety glasses and working gloves.
Avoid possible generation of static electricity. Use non-sparking tools and explosion proof testers.
Do not open any of the instrument covers while power is still connected.
Never start working before the work permit is signed by all parties.
Pay attention to the kind of product in the tank. If any danger for health, wear a gas mask
and take all necessary precautions.

Commissioning
Instruction manual 854 ATG Page 11
3 Commissioning
3.1 Checks before starting the commissioning
Examine the mechanical and electrical installation after the 854 ATG is installed on the tank.
Refer to the installation guide 854 Advanced Technology Gauge.
•Check the correct orientation of the gauge with respect to the tank.
•Check that the gauge is leveled within 2°.
•Check that the O-ring and gaskets are supplied.
•Check that the mains voltage selector of the 854 ATG indicates the local mains supply.
•Check the connections of all electrical cabling.
•Check the ground connection of the 854 ATG to the tank.
•Check that non-used cable inlets are sealed with appropriate stopping plugs.
•Close carefully all covers (mind the O-rings) before any electrical power is applied.
Caution
Keep screw thread from the compartment covers free from dirt.
Grease them lightly with an acid-free grease before closing the instrument.
When closing, turn the covers counter-clockwise until the thread clicks into place, then turn clockwise.

Commissioning
Page 12
3.2 Installation of measuring drum and displacer
3.2.1 Tools
It is recommended to use an 847 PET (Portable Enraf Terminal) to load the different parameters.
A tool set for commissioning and maintenance is available from Honeywell Enraf (see figure 3.1).
Item Description
1 Allen key 2 mm
2 Allen key 3 mm
3 Allen key 4 mm
4 Allen key 5 mm
5 Allen key 8 mm
6 Drum bearing puller
7 test magnet
8 Screwdriver for Allen key screws M4
9 Screwdriver for Allen key screws M6
10 Pipe wrench 27 mm
11 Tommy bar
Figure 3.1 Tool set for 854 ATG (part no. A1854062)
3.2.2 Installation of measuring drum
•Remove the drum compartment cover (rear cover).
•Check whether the drum shaft is properly positioned in the
drum.
•Attach the smallest of the four test weights (or another small
weight) to the measuring wire, remove the rubber band
securing the measuring wire and feed the wire and test weight
through the neck of the gauge (see figure 3.2).
•Insert the measuring drum onto its bearings.
•Check the axial free-play of the drum as follows:
•Push the drum towards the magnet cap in such a way that the
drum shaft meets the magnet cap. Release the drum.
•Bring the drum in a slight vibration. The drum and drum Figure 3.2 Installing drum
shaft should now move towards you with a axial movement of
minimum 1 mm and maximum 2.5 mm.
•Note the engraved drum circumference value on a piece of paper for later use. There are several
numbers engraved on the measuring drum. The number you are looking for has a value of
approximately 338 mm (for example: 338.028).

Commissioning
Instruction manual 854 ATG Page 13
3.2.3 Installation of displacer
•If a density displacer is used, note the engraved displacer weight
and displacer volume on a piece of paper for later use.
•Remove the test weight and attach the displacer to the wire
through a mounting hatch.
Note:
If there is no mounting hatch available, the displacer can be
installed by temporarily removing the gauge from the nozzle.
To provide electrical contact between the measuring wire and
displacer, thus permitting the discharge of static electricity and
preventing loss of the displacer, the displacer must be secured
to the measuring wire.
•Take an extra piece of wire and fasten one end to the measuring
wire, pass the other end through the hole in the end of the
displacer hook. Secure this end several times around the hook Figure 3.3 Mounting displacer
(see figure 3.3).
•Close the drum compartment cover.
3.2.4 Unlocking (locking) the motor block
The motor block is locked during transport to protect the force transducer.
After installing the measuring drum and displacer, the motor block locking device must be unlocked.
•Open the electronic compartment cover (front cover).
•Locate the transport bracket (see figure 3.4).
Loosen (do not remove) the Allen key screw and
turn the transport bracket the opposite way.
Use screwdriver for Allen key screws M4
(item 8 of the Honeywell Enraf tool set).
•Fix the Allen key screw of the transport bracket.
•Check the span wire. It should always be under tension
while both ends are correctly positioned in the levers of
the motor block and force transducer.
•Close the electronic compartment cover.
Figure 3.4 Motor block (un)locked
Note:
Use the same procedure for locking the motor block if the 854 ATG needs to be removed.

Commissioning
Page 14
3.3 Programming (configuring) the gauge
3.3.1 Introduction into programming
The 854 ATG is a field-configurable multi-processor
instrument. The instrument can be totally programmed
out in the field, or remotely, without opening the gauge.
It is recommended to use an 847 PET (Portable Enraf
Terminal) to load the different parameters.
It is coupled to the 854 ATG via an infra-red coupling.
The 847 PET is intrinsically safe and waterproof (IP65)
and consists of a full ASCII membrane keyboard and
an LCD display (refer to figure 3.5).
Alternatively, the Honeywell Enraf service tool Engauge
can be used to configure the instrument.
The Engauge program runs on a PC under Windows®.
It is recommended to use the service tool to make a
log file of the instrument. A log file contains all
important settings and the information is stored on the
hard disk.
For more information, refer to the Instruction manual
Engauge service tool.
Figure 3.5 Programming the 854 ATG by using
the 847 Portable Enraf Terminal
The item concept
All parameters, settings, etc, are accessible via so-called items. These items all have unique 2-letter
abbreviations which allow easy access and programming. In this manual, items are printed bold.
There are three different type of items:
Type of item Description
Commands
These will force the gauge to execute a special task or function.
For example: EX (exit). After the EX command the instrument start initialising and
modified NOVRAM settings become active.
Data requests
Items for request of setup or measuring data from the gauge.
For example: JS (jumper setting). Item JS returns the jumper setting on the XPU(-2)
board. Some of the data items are read-only.
NOVRAM settings
All parameters which can be programmed and should not be lost after power break
down, are stored in NOVRAM. The NOVRAM is a non-volatile RAM memory which
does not require battery back up.
Data stored in NOVRAM can be protected by a password and by the Weights & Measures (W&M) jumper on
the XPU(-2) board (refer to figure 3.6).
Protection levels are provided for all NOVRAM items, depending on the importance of an item. Protection
level 1 is protected by password 1 (W1) and protection level 2 is protected by password 2 (W2).
If the NOVRAM is protected by the W&M jumper J(A)3 level 2 NOVRAM items cannot be changed without
opening the gauge, thereby breaking off the sealing.
Most data requests and commands are not password protected.

Commissioning
Instruction manual 854 ATG Page 15
Protection level 1
Access to items which are not directly measurement related, such as high level alarm (HA), tank identifier
(TI), etc. is protected by password 1 (W1). It is possible to modify these data only after entering the correct
level 1 password W1=XXXXXX, where XXXXXX is the level 1 password.
Password W1 itself can be read protected by means of jumper J(A)1 on the XPU(-2) board.
Protection level 2
All NOVRAM items which affect the (remote) level reading, such as reference level (RL), transmission
address (TA), etc. are protected by password 2 (W2). It is possible to modify these data only after entering
the correct level 2 password W2=XXXXXX, where XXXXXX is the level 2 password. Additional measurement
related items, such as temperature items, can also be protected by password 2.
Password W2 itself can be read protected by means of jumper J(A)2 on the XPU(-2) board.
In protection level 2, the items which reside under protection level 1 can also be modified.
W&M protection
Items under protection level 2 can also be protected by jumper J(A)3 on the XPU(-2) board. If this jumper is
placed in position 1, the write access is completely disabled. Also issuing the correct level 2 password will not
work.
The table below gives an overview of the XPU(-2) jumper functions (refer also to figure 3.6).
Jumper (XPU / XPU-2) Function Position “0” Position “1”
JA1 / J1 read password 1 not protected protected
JA2 / J2 read password 2 not protected protected
JA3 / J3 W&M protection not protected protected
JA4 NOVRAM initialising active not active
JA5 - JA7 / J4 - J6 spare
Figure 3.6 Jumpers on XPU and XPU-2 board

Commissioning
Page 16
How to program?
When the 847 PET is plugged into the 854 ATG and the instrument is powered, the PET can be switched on.
By operating the keyboard, items can be requested and settings can be changed.
For example:
Item (+ setting) Description
(typing in on PET keyboard)
RL <enter> Request for the current value of item RL (reference level).
The reply on the PET display will be: RL+000.0000
This means: the reference level is: 0 metres.
W2=ENRAF2 <enter> Enter protection level 2 (default level 2 password is: ENRAF2).
RL=+012.3400 <enter> Give the required setting for the reference level
(here, as an example: 12.34 metres).
EX <enter> Exit protection level 2.
The 854 ATG will now initialise and the new entered value of the
reference level will become active after the re-start.
Recommended programming sequence
The 854 ATG is already pre-programmed at the factory. However, several parameters, application depended,
must be programmed at commissioning.
Step 1 Start with programming / checking of the format depended items (refer to section 3.3.3)
Step 2 Proceed with programming / checking of the items for the standard level measurement without
optional functions (refer to sections 3.3.4 to 3.3.7).
Step 3 Check with the identification code on the label of your 854 ATG whether the gauge is equipped with
one or more optional functions, and program the items for that options (refer to the appropriate
option manuals).
3.3.2 Apply power to the 854 ATG
To program the gauge, power must be switched on. That should be done in this stage.
Note:
After the initialisation of the gauge, the displacer is moving down, because the default level setting is at 26
metres.
If the displacer movement is unwanted in this stage, issue the FR command by the PET. This action freezes
the displacer position. This command must be repeated after each EX (exit) or RS (reset) command.
The freeze command can be cancelled by the UN (unlock) command.

Commissioning
Instruction manual 854 ATG Page 17
3.3.3 Selecting dimension and decimal separator
When one of the dimension items are changed, all items with related formats have to be changed and the
values must be converted to the new dimension. The same applies for the decimal separator.
Note:
When the 854 ATG is equipped with an XPU-2 board (can be recognised by requesting the software
version item SV reads: XPU ... Hx.x), then all dimension depended items will be automatically changed
and the values will be automatically converted.
Item Name Description
W2= Protection level 2 Enter protection level 2 (default password: ENRAF2)
LD= Level dimension Selects and converts the level dimension.
This item contains one character, which can be:
M : metres; format: sign X X X separator X X X X
F : feet; format: sign X X X X separator X X X
I : inches; format: sign X X X X X separator X X
P : fractions; format: sign X X ‘ X X “ X X
DP= Decimal separator The item DP (decimal separator) can be:
.: point or
,: comma
. . = format depended items Not required with XPU-2 board.
Program all level dimension and/or decimal separator depended items
to the new dimension and/or separator. Refer to the table below for an
overview of these items.
EX Exit Exit protection level
Items from which the format depends on the level
dimension and decimal separator
Additional items from which the format
depends on the decimal separator
AH HL LP *) MP *)
AM *) IL *) LS *) MZ
AN *) L2 MG *) RL
DB L3 MH RP *)
DH LA MI *) TT
DZ LL MK *) UR
HA LM *) ML
HH LN *) MO *)
28 *) M1 *)
29 *) M2 *)
DL *) M3 *)
DU *) O1 *)
H1 *) O2 *)
H2 *) O3 *)
H3 *) PH *)
HD *) RO *)
*) The presence of these items depends on the installed option board
Standard floating point format
Some items are expressed in a floating point format. The floating point format is a fixed format;
•Standard floating point format: sign point M M M M M M M M E sign P P
where: M = Mantissa
P = Exponent

Commissioning
Page 18
3.3.4 Tank and gauge data
Refer to figure 3.7 for the tank related data.
Figure 3.7 Tank related level items