Honeywell Enraf 854 ATG User manual

Installation guide 854 ATG Page 1
Installation guide 854
Advanced Technology Gauge
July 2008
Part no. 4416.225
Rev. 6
Enraf B.V.
P.O. Box 812
2600 AV Delft
Netherlands
Tel. : [phone]
Fax : [phone]
E-mail : [e-mail]
Website : http://www.honeywellenraf.com

Preface
Page 2 Installation guide 854 ATG
Preface
The Honeywell Enraf 854 ATG is a servo gauge which measures the liquid level and can also be
programmed to measure two additional interface levels.
This installation guide is intended for technicians involved in the mechanical and electrical
installation of the Honeywell Enraf Series 854 ATG (Advanced Technology Gauge).
EC declaration of conformity
Refer to the EC declaration of conformity, shipped with the instrument.
Note:
All connections to the instrument must be made with shielded cables with exception of the
mains, alarm outputs and Honeywell Enraf field bus cable. The shielding must be grounded in
the cable gland on both ends of the cable.
Legal aspects
The mechanical and electrical installation shall only be carried out by trained personnel with
knowledge of the requirements for installation of explosion-proof equipment in hazardous areas.
The information in this installation guide is the 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;
$Neglect of the general safety precautions for handling tools, use of electricity and
microwave radiation.
The contents, descriptions and specifications in this installation guide are subject to change without
notice. Enraf B.V. accepts no responsibility for any errors that may appear in this installation guide.
Additional information
Do not hesitate to contact Honeywell Enraf or its representative if you require additional
information.

Safety
Installation guide 854 ATG Page 3
Safety
Safety aspects of 854 ATG
Warning
Do not use the instrument for anything else than its intended purpose.
For medium pressure versions (till 6 bar), the 854 ATG drum compartment housing is of aluminium,
and for chemical version it is of stainless steel.
For high pressure version (max. 40 bar ; max. 25 bar in acc. to PED), the 854 ATG housing is of
stainless steel.
The housing of the 854 ATG is explosion-proof:
$II 1/2 G EEx de [ib/ia] IIB T6 acc. to KEMA 01ATEX2092 X, 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 ; max. 25 bar in acc. to 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
Improper installation of cable glands, conduits or stopping plugs
will invalidate the Ex approval of the 854 ATG.

Safety
Page 4 Installation guide 854 ATG
Personal safety
The technician must have basic technical skills to be able to safely install the equipment.
When the 854 ATG is installed in a hazardous area, the technician must work in accordance with
the (local) requirements for electrical equipment in hazardous areas.
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.
Make sure no dangerous quantities of combustible gas mixtures
are present in the working area.
Never start working before the work permit has been 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.
Safety conventions
AWarnings@, ACautions@and ANotes@are used throughout this installation guide 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 the attention to an action which may damage the equipment;
$A Note points out a statement deserving more emphasis than the general text, but not
requiring a AWarning@or a ACaution@.

General precautions
Installation guide 854 ATG Page 5
General precautions
Caution
During transport of the gauge the motor block
should be locked.
This is for protection of the weighing system.
Caution
The box in which the 854 arrives also contains
the measuring drum.
This is a precision measuring device and shall only
be installed by a qualified commissioning engineer.
Accurate measurement requires an undamaged
and clean drum.
Figure 1 Motor(un)locking
Special tools
Screw driver for Hex Allen-key screws M4 (length min. 22 mm) Part No.: 2998.506
Tommy bar Part No.: 2998.026

Mechanical installation
Page 6 Installation guide 854 ATG
Mechanical installation
Note:
The entire installation procedure shall be in accordance with national, local and company
regulations.
Preparation for transportation of the gauge
Caution
Do not transport the instrument with the motor unlocked. Refer to figure 1 for motor locking.
Drum should be transported in original protective box. Drum and displacer shall only be installed by
a qualified commissioning engineer.
Process connection
The 854 ATG can be ordered with race face or flat face flange. Select gasket that is suitable for
flange type, maximum pressure and product to be stored. Mount instrument flange horizontally.
Warning
Verify that tank or drum compartment is depressurized before opening
the tank or drum compartment cover of 854 ATG.
The 854 ATG can be adapted to various process connection flanges via adapters/calibration
chambers as specified in Appendix B. Verify that maximum working pressure of adapter/calibration
chamber complies with pressure in your tank.
Note:
When using 854 ATG on pressurized tank, it is recommended to install a suitable valve
between tank and 854 ATG to isolate the instrument from the process when required.
The valve shall have an opening large enough to feed through the displacer.

Mechanical installation
Installation guide 854 ATG Page 7
Orientation of 854 ATG gauge on tank
Mount the gauge in one of the following two ways.
Figure 2 Orientation of the gauge on a tank (top view)
On a stilling well or guide pole, the orientation of the gauge may be chosen freely.
Note:
The weight of the 854 ATG for: - medium pressure version is : 16 kg (35 lbs);
- chemical version is : 21 kg (46 lbs);
- high pressure version is : 26 kg (57 lbs).

Mechanical installation
Page 8 Installation guide 854 ATG
Bolts
Secure the gauge adapter by using appropriate bolts. *)
Flange type Number of bolts Diameter x minimum length
NW50, ND6 4 M12 x 50
NW50, ND40 4 M16 x 60
2", 150 lbs 4
5
/
8
" x 3" (M16 x 80)
2", 300 lbs 8
5
/
8
" x 3" (M16 x 80)
6", 150 lbs 8
3
/
4
" x 3
1
/
4
" (M20 x 80)
6", 300 lbs 12
3
/
4
" x 4" (M20 x 100)
*) Bolt dimensions (acc. to DIN 2527, ANSI B16.5) are given in the table.
Mounting a pressure gauge set
1 Connect T-piece horizontally to drum house.
2 Check whether manometer is suitable for the maximum pressure in the tank.
3 Mount manometer and vent valve (figure 3).
4 Close vent valve.
5 Gently open valve between tank and drum compartment and check for leakage on all
connections.
Figure 3 Mounting a pressure gauge set on a 854 Servo gauge

Mechanical installation
Installation guide 854 ATG Page 9
Grounding
Warning
For proper grounding of the 854 ATG, install a copper strip under one of
the flange bolts for each flange.
Place shark rings between flange and strip (figure 4).
Figure 4 Example of flange ground
Note:
Also in case of tanks with cathodic protection, the 854 ATG must be grounded to the tank.
Cathodic protection can be maintained by isolating the cable screen/armouring or conduit.

Electrical installation
Page 10 Installation guide 854 ATG
Electrical installation
The entire electrical installation shall be in accordance with International Standard IEC 79-14 for
electrical equipment to be installed in hazardous areas.
Warning
Make sure that all power to the instrument is switched off before opening
the cover of the electronic and terminal compartment.
Failure to do so may cause danger to persons or damage the equipment.
All covers of the 854 ATG must be closed before switching on the power.
Figure 5 Blocking / sealing facilities
Caution
Before opening the electronic and terminal compartment cover, remove the optional
blocking devices which locks the covers: > A = : for electronic compartment cover and
terminal compartment cover; > B = : for drum compartment cover.
Caution
Do not damage the thread of the covers and instrument and keep the thread free of dirt.
After opening, grease it lightly with anti seize grease.
When closing, never tighten the covers before the threads are properly engaged.
The covers should be turned counter-clockwise until the thread A clicks @ in place,
then turn clockwise until the covers are fully closed.
After closing the covers, do not forget to place the blocking devices.