installation guide 864 mtt multi thermo sensor … guide 864 mtt multi thermo sensor thermometer...
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Installation guide 864 MTT Page 1
Installation guide 864 MTT Multi Thermo sensor Thermometer
April 2010
Part no. 4416.234
Revision 3
Honeywell Enraf
PO Box 812
2600 AV Delft
Netherlands
Tel. : +31 15 2701 100
Fax : +31 15 2701 111
E-mail : [email protected]
Website : http://www.honeywellenraf.com
Preface
Page 2 Installation guide 864 MTT
Preface
This installation guide is intended for technicians involved in the mechanical installation of the
Enraf series 864 Multi Thermo sensor Thermometer. The electrical installation can be found at the
Installation guide 762 VITO Interface and 764 / 765 / 766 VITO temperature and/or water bottom
probes. The technician must have basic technical skills and knowledge of safety regulations and
explosion-proof equipment in hazardous areas.
EC declaration of conformity
Refer to the EC declaration of conformity, shipped with the instrument.
Legal aspects
The mechanical and electrical installation shall 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 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 safety regulations for handling tools and use of electricity.
The contents, descriptions and specifications are subject to change without notice. Enraf B.V does
not accept responsibility for any errors that may appear in this installation guide.
Additional information
Please do not hesitate to contact Enraf or its representative if you require additional information.
Safety
Installation guide 864 MTT Page 3
Safety
Safety aspects of the 864 MTT
The housing of the 864 MTT is intrinsically safe, certified by KEMA (Netherlands):
II 1 G EEx ia II B T4, KEMA 01ATEX1212 X
The environmental conditions for the 864 MTT are:
operating pressure : max. 5 bar
relative humidity : 0 - 100 %
operating temperature : -20 °C to 90 °C; standard temperature range (Nylon)
-55 °C to 135 °C; standard temperature range (Stainless steel)
-55 °C to 200 °C; high temperature range (Stainless steel)
-55 °C to 250 °C; very high temperature range (Stainless steel)
-200 °C to 70 °C; very low temperature range (Stainless steel)
Safety conventions
“Warnings”, “Cautions” and “Notes” have been 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 does
not deserve a “Warning” or “Caution”.
Warning Do not use the instrument for anything else than its intended purpose.
Safety
Page 4 Installation guide 864 MTT
Personal safety
The technician must have basic technical skills to be able to safely install the equipment.
When the 864 MTT 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.
Do not rub the surface of the 864 MTT with a cloth to avoid the built-up of
electro-static charges. These may cause sparks and explosions
in hazardous areas, if a combustible gas mixture is present.
Make sure no dangerous quantities of combustible gas mixtures
are present in the working area.
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.
Installation
Installation guide 864 MTT Page 5
Installation
Installation conditions
The 864 MTT can be installed either in two ways:
• in a thermowell
• directly in the tank (with anchor weight)
Installation in a vertical thermowell
Minimal, a 1½" thermowell can be used; but we recommend to use a 2" thermowell.
The thermowell flange must be provided with a G ½ threaded opening.
The thermowell can be provided with holes, or it can be closed.
For open thermowells it must be checked, whether the outer sheathing material of the 864 MTT is
resistant against the product. In general, we recommend the use of closed thermowells.
Closed thermowells can be filled with oil for a better heat transfer between the stored product and
the 864 MTT. Normal transformer oil can be applied for this purpose.
Note: We do not recommend to use oil
filled thermowells in tanks with
heated products. Due to the heating
at the lower end, the oil will circulate
in the well which results in a
temperature mismatch.
With oil filled thermowells, take care that
oil can expand when heated, without
creating an over pressure.
Use expansion pipe or vent opening
under flange (refer to figure 1), or other
suitable method. Figure 1 Vent opening and expansion pipe
Caution Water ingression must be
prevented in the thermowell.
When freezing, water becomes ice, which can damage the 864 MTT.
Installation
Page 6 Installation guide 864 MTT
Installing the 864 MTT in a thermowell
Refer to figure 2.
• Before starting the installation of the 864 MTT, use a measuring tape to check the depth of
the thermowell. The overall length of the 864 MTT must be within +200 mm (+8") and
• -100 mm (-4") from the measured depth.
• Take care that the leads are not damaged or twisted. Slowly unroll the 864 MTT while
feeding it into the thermowell. Do not bend the 864 MTT further than it was in its packing.
• Place a G ½ nut (2) on the MTT extension tube (1) when the flange (3) is not provided
with a screw thread. This nut is not included with the 864 MTT.
• Screw the flange (3) on the 864 MTT and adjust the inside length of the 864 MTT. Apply
some acid free grease or Teflon® tape at the location of the flange on the 864 MTT
extension tube.
• Secure the flange on top of the thermowell with bolts and nuts.
• Place lock washer (4) over MTT extension tube and fasten G ½ locknut (5) on flange.
• Place 864 MTT indication plate (6) over locknut and secure it with a second G ½ nut (7).
Figure 2 Installing 864 MTT
Installation
Installation guide 864 MTT Page 7
Installation directly in the tank, suspended from roof nozzle
This is only suitable with tanks at a low pressure
(max. 0.5 bar vapour pressure). It must be checked,
whether the outer sheathing material of the 864
MTT is resistant against the stored product.
The 864 MTT has a lug at the lower end to which an
anchor weight can be attached. The installation
requires a suitable flange, provided with an G ½
threaded opening (refer to fig. 3).
Refer to figure 2.
• Attach the anchor weight to the 864 MTT
lug.
• Take care that the leads are not Figure 3 Anchor weights
damaged or twisted.
• Slowly unroll the 864 MTT while lowering it through the roof nozzle. Do not bend the 864
MTT further than it was in its packing.
• Place a G ½ nut (2) on the MTT extension tube (1) when the flange (3) is not provided
with a screw thread. This nut is not included with the 864 MTT.
• Screw the flange (3) on the 864 MTT and adjust the suspended length of the 864 MTT.
Apply some acid free grease or Teflon® tape at the location of the flange on the extension
tube of the 864 MTT.
• Secure the flange on top of the roof nozzle with bolts and nuts.
• Place lock washer (4) over MTT extension tube and fasten G ½ locknut (5) on flange.
• Place 864 MTT indication plate (6) over locknut and secure it with a second G ½ nut (7).
Warning Only install the 864 MTT with Nylon outer
sheathing on products which cannot
built-up an electro-static charge.
Caution When an anchor weight is attached,
the maximum static load is:
23 kg (50 lbs) for Stainless Steel version
13 kg (30 lbs) for Nylon version
Installation
Page 8 Installation guide 864 MTT
Zone 0 adapter
For Germany only.
Refer to figure 4.
• Place G ½ nut (1) and toothed lock
washer (2) on 864 MTT extension tube.
• Remove carefully the braided plastic
insulation from the flying leads, starting
within 1 cm from the end of the
extension tube.
• Disassemble the zone 0 adapter.
• Screw part (3) on the 864 MTT
extension tube. Lock with nut (1).
• Feed the MTT wiring through the
• rubber (6).
• Slide rubber in position.
• Place plastic gland (5).
• Turn part (7) in place and fix locking
screw (4).
The 762 VITO Interface will be installed directly
on top of the zone 0 adapter
(refer to installation guide 762 VITO Interface
and 764 / 765 / 766 VITO temperature and/or
water bottom probes).
Figure 4 Zone 0 adapter
Caution For zone 0 applications only:
The 864 MTT has been approved by PTB for zone 0 applications.
When the German zone 0 requirements are applicable and the 864 MTT is directly
installed in the zone 0 (no closed thermowell), then a zone 0 adapter must be
installed on top of the 864 MTT.
Appendix
Installation guide 864 MTT Page 9
Appendix A Dimensional drawings
Note: Sensitive length in this figure is at maximum value.
Highest temperature element can be positioned lower
(refer to identification code in product sheet 864).
Appendix
Page 10 Installation guide 864 MTT
Appendix B Related publications
Installation guide 862 MIT / MIR
Installation guide 762 VITO Interface and 764 / 765 / 766 VITO temperature and/or water bottom
probes
Instruction manual Temperature, Water bottom and Analog output options
Instruction manual 862 MIT
Installation guide 864 MTT Page 11
Page 12 Installation guide 864 MTT
Delftechpark 39 2628 XJ Delft Tel. :+31 15 2701 100 E-mail : [email protected] Webiste: www.honeywellenraf.com PO Box 812 2600 AV Delft The Netherlands We at Honeywell Enraf are committed to excellence. Information in this publication is subject to change without notice Enraf is a registered trade mark. Enraf B.V. Netherlands