Ashcroft A Instruction Manual

IM-BiM/ATEX-EN-Rev E09/2021 page 1 of 19
P/N 095I201-02EN
Installation and Maintenance
Instruction Manual
Bimetal Thermometer Modell A and E
for explosion risk areas in the European Union pursuant to Directive 2014/34/EU & for the United
Kingdom pursuant to Regulation SI 2016, No. 1107 (ATEX)
- according to ASME B40.200: 50=E#=###=ATEX or 50=ERT#=###=ATEX
- according to EN 13190: ###=A#=###=ATEX or ##=ART#=###=ATEX

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Table of Contents:
1General remarks.........................................................................................................................................................4
1.1 Purpose of this manual ......................................................................................................................................4
1.2 Symbols .............................................................................................................................................................4
1.3 Limitation of liability............................................................................................................................................4
1.4 Copyright............................................................................................................................................................4
1.5 Warranty ............................................................................................................................................................4
1.6 Manufacturer address, customer service ..........................................................................................................4
2Safety..........................................................................................................................................................................5
2.1 General sources of danger ................................................................................................................................5
2.2 Intended use ......................................................................................................................................................5
2.3 Operator’s responsibility ....................................................................................................................................5
2.4 Personnel qualification.......................................................................................................................................5
2.5 Signs/safety marking .........................................................................................................................................6
2.6 Safety devices....................................................................................................................................................6
2.7 Environmental protection ...................................................................................................................................6
3Use in potentially explosive atmospheres according to Directive 2014/34/EU ATEX & Regulation SI 2016, No.
1107 ...................................................................................................................................................................................6
3.1 Range of use:.....................................................................................................................................................6
3.2Special operating conditions for safe use in potentially explosive atmospheres...............................................9
4Technical data ............................................................................................................................................................9
5Marking of the device .................................................................................................................................................9
6Structure and function ...............................................................................................................................................9
6.1 Overview ............................................................................................................................................................9
6.2 Functional description........................................................................................................................................9
6.3 Description of the components ........................................................................................................................10
6.4 Accessories......................................................................................................................................................10
7Transportation ..........................................................................................................................................................10
7.1 Delivery ............................................................................................................................................................10
7.1 Storage ............................................................................................................................................................10
8Assembly/Installation................................................................................................................................................11
8.1 Preparation ......................................................................................................................................................11
8.2 Requirements for the installation site...............................................................................................................11
8.3 Process connection..........................................................................................................................................11
8.4 Starting up........................................................................................................................................................12
8.5 Subsequent relocation of the thermometer .....................................................................................................12
9Maintenance .............................................................................................................................................................12
9.1 Function check and recalibration .....................................................................................................................12
9.2 Cleaning and maintenance ..............................................................................................................................12
10 Faults ...................................................................................................................................................................13
10.1 Behaviour after rectifying the fault ...................................................................................................................13
11 Dismantling & disposal ........................................................................................................................................13
11.1 Disassembly.....................................................................................................................................................13
11.2 Disposal ...........................................................................................................................................................13
12 Appendix ..............................................................................................................................................................14

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12.1 Data sheet Bimetal Thermometer Ax / Ex .......................................................................................................14
12.2 EU Declaration of Conformity ..........................................................................................................................15
12.3 UK Declaration of conformity ...........................................................................................................................17

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1 General remarks
The thermometer described in these operating instructions is designed using the latest standards, guidelines and
findings. During the manufacturing processes, all components are subject to our high quality and environmental
criteria. For this purpose, we maintain certified management systems according to ISO 9001 and ISO 14001. For the
special requirements of devices for intended use in potentially explosive atmospheres, we maintain a management
system according to ISO 80079-34.
1.1 Purpose of this manual
These operating instructions contain basic instructions that must be followed for the installation, operation and
maintenance of the device. It must be read by the installer, the operator and the specialist personnel responsible for the
device before the device is installed and commissioned. These operating instructions must always be available at the
place of use.
The following sections on general safety instructions 2 as well as the following special instructions on intended use 2.2
to disposal 11.2 contain important safety instructions, the non-observance of which may cause health and safety hazards
to people, in particular to workers, and possibly to domestic and farm animals, as well as property.
1.2 Symbols
Warning!
…...indicates a potentially hazardous situation, the non-observance of which may cause hazards
to the health and safety of people, especially workers, and possibly to domestic and farm animals,
as well as property.
Information!
... highlights important information for efficient and trouble-free operation.
1.3 Limitation of liability
Improper use of the equipment, failure to observe the operating instructions, use of unqualified personnel for
installation and maintenance work, or unauthorized modifications to this equipment will inevitably result in the loss of
liability claims against the equipment manufacturer.
1.4 Copyright
These operating instructions may only be reproduced and passed on as a complete document without the special
consent of the publisher.
Subject to technical changes.
1.5 Warranty
For the product described here we grant warranty according to § 6 warranty for defects, in our General Terms and
conditions of delivery and payment.
1.6 Manufacturer address, customer service
Ashcroft Instruments GmbH
Max-Planck-Straße 1
D-52499 Baesweiler
Tel.: [phone]
Fax.: [phone]
Mail: [e-mail]
Web: www.ashcroft.eu

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2 Safety
2.1 General sources of danger
Temperature measuring devices are usually a part of a DCS system and their failure can lead to dangerous situations.
The selection of the temperature measuring device should be made according to the regulations of EN 13190 or ASME
B40.200.
2.2 Intended use
The devices may only be used for the purpose intended by the manufacturer.
The intended use of the devices, determined by the manufacturer, is the direct indication of temperature in potentially
explosive atmospheres.
When operating the device, care must be taken to ensure that the medium used is harmless to the selected device
material. Process media that exhibit changes in the state of aggregation within a range of application can influence the
functionality. Negative influences must be avoided for this reason. The process condition of these media must be within
the technical limits of the device. In processes measuring temperatures under pressure or other influences, thermowells
have to be used.
Especially when used in potentially explosive atmospheres, the limiting values and technical specifications of the device
manufacturer must be followed.
Further technical data on the intended use are summarized in the product data sheet, see section 12.1these instructions.
2.3 Operator’s responsibility
Instructions for the proper operation of the device must be observed. They are to be provided by the operator, the
respective qualified personnel for installation, maintenance and operation. Hazards due to magnetic fields, electrostatic
charges and leaking media due to improper connection of the device must be excluded. The device must be included in
the equipotential grounding within the system; this can be ensured by selecting electrically conductive seals.
The device must be taken out of operation and secured against unintentional operation if it must be assumed that safe
operation is no longer possible (see chapter 10, Faults).
Opening the device and performing technical modifications by the customer violate the explosion
protection approval and are not permitted.
The operational safety of the device and the manufacturer's warranty are only guaranteed if the device is used as
intended. The device design, as well as a possible housing filling, must be adapted to the medium and potentially
explosive atmosphere used in the plant. The limit values specified in the technical data must not be exceeded.
The safety instructions listed in this operating manual, existing national regulations for accident prevention and internal
work, operating and safety regulations must be observed by the operator. Furthermore, he is responsible for ensuring
that all prescribed maintenance, inspection and assembly work is carried out by authorized and qualified personnel..
The device is to be regarded as a temperature measuring part of a plant in a potentially explosive atmosphere. The
operator of this plant is obliged to carry out an ignition hazard analysis and a zone classification.
2.4 Personnel qualification
The device may only be installed and commissioned by trained specialist personnel.
Specialized personnel are persons who are able to perform the work assigned to them due to their specialized training,
experience and knowledge of the country-specific regulations, applicable standards and guidelines. For explosion-
protected devices, the personnel must be trained or instructed or authorized to work on explosion-protected devices in
hazardous areas.

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2.5 Signs/safety marking
The device is provided with a label. The label shows the type designation, measuring range, serial number, year of
manufacture, certificate of approval number, filling medium, Ex marking (including X for special conditions of use) and
manufacturer.
On the dial the manufacturer, measuring unit, accuracy class, note Silicone-free and the applied standard are visible.
The device may have other labels and safety marks indicating special conditions of use:
Hot surface
Note on calibration
The operator must check the label, which is important for the use in potentially explosive atmospheres, at regular
intervals to ensure that it remains legible.
The outer packaging is labelled with the type designation, order number, item number, measuring range and
manufacturer's data.
2.6 Safety devices
The window is made of laminated safety glass, no other material options are permitted here.
2.7 Environmental protection
This device may optionally contain filling liquid (silicone oil). The provisions of the Regulation on Registration, Evaluation,
Authorization and Restriction of Chemicals (REACH) 2006/1907/EC must be observed, the corresponding safety data
sheets of the manufacturers of the chemicals, are available for download on our website. At the end of the product life
cycle we recommend to recycle the devices, as they are mostly made of stainless steel. Instructions for disassembly,
material separation and disposal can be found in chapter 11
3 Use in potentially explosive atmospheres according to Directive
2014/34/EU ATEX & Regulation SI 2016, No. 1107
3.1 Range of use:
Potentially explosive atmospheres Zone 1 and 2, as well as 21 and 22, hazard due to gases and dry dusts.
The permissible environment has the usual oxygen content (21%), ambient pressure 80 kPa (0.8 bar) to 110 kPa (1.1
bar).
The requirements of the applicable standards EN ISO 80079-36, EN ISO 80079-37, EN 60079-0 were considered by
an ignition hazard assessment. The applicable requirements of these standards have been met.
For the European Union the documentation has been filed with TÜV-Nord-Cert NB 0044 (see Declaration of
Conformity). For the United Kingdom, the documentation has been filed with Element Materials Technology AB 0891
(see Declaration of Conformity).
Ambient temperatures:
Execution Min. / Max. permissible ambient temperature
Dry finish -20°C to +60°C
Silicone filled devices

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Process media temperatures:
Permissible max. media temperature
Dry finish Overload temperature
short term
Silicone filled devices Overload temperature
short term
max. 500°C
<120°C
= 100 % F.S.
>120°C up to
289°C
= 50% F.S.
≥290°C up to 500°C
no overload
max. 300°C <120°C
= 100 % F.S.
>120°C up to
200°C
= 50% F.S.
>200°C up to 300°C
no overload
F.S. = full scale value
The medium temperature depends on the ignition temperature of the surrounding gas, vapours or dust, on the design
of the device, especially the convection heat and the surface, as well as the ambient temperature and other external
heat sources. The device itself does not have its own heat source.
Temperatures in explosive atmospheres - Gases and vapours
The maximum surface temperature including
the ambient temperature, for the application
on site, depends on the device type with its
technical specifications. The lowest
temperature limits apply in each case.
For the device type with a compression fitting, the stem length "S" is adjustable. If a part of the
stem is not inserted in the process, the temperatures transmitted by the protruding stem must be
determined. These temperatures are to be included in the user's ignition hazard assessment.
In order to ensure proper functioning of the thermometer, a minimum immersion depth of the stem in the media of
65 mm to 100 mm, depending on the instrument type, must be observed.
Temperatures in explosive atmospheres - Dusts
For the determination of the ignition temperature, the method according to ISO/IEC 80079-20-2 is to be used. This can
only be carried out by the user on site for the individual case. The device-specific properties as well as the limit
temperatures of the dusts and their form as a deposited layer or in the form of a surrounding dust cloud must be taken
into account here. For this reason, the ignition temperatures must be determined separately. In the case of dust layers,
the thickness of the dust layer must be taken into account as a further criterion.
EPL
Temperature classes
Ignition temperatures
for gases and vapours
Permissible, max. surfaces
incl. ambient temperature
Dry finish Liquid filled
devices
Gb T1 (> 450°C) 425°C 250°C
T2 (> 300°C … ≤450°C) 290°C 250°C
T3 (> 200°C … ≤300°C) 195°C 195°C
T4 (> 135°C … ≤200°C) 130°C 130°C
T5 (> 100°C … ≤135°C) 95°C 95°C
T6 (> 85°C … ≤100°C) 80°C 80°C

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In case of a
malfunction, the
maximum medium
temperature may be
considered as the
surface temperature to
be determined.
For device types with every angle connection, the dust support surface may change depending on
the position selected by the user. These changed surfaces must be taken into account in the user's
ignition hazard assessment. For the device type with a compression fitting, the stem length "S" is
adjustable. If part of the stem is not located within the process, the derived temperatures must be
determined at the protruding stem, as this will increase the dust contact area. These temperatures
must also be included in the user's ignition hazard assessment.
For mounting locations that allow weather influences, these influences must be minimized by suitable measures. To
avoid additional heating, the devices must not be exposed to any external heat source during operation! Convection
heat from the direct environment of the devices must also be avoided.
The devices must not be operated in potentially explosive areas of a plant in which an explosive
mixture of gases and dusts is present in the atmosphere.
Labelling:
Ex marking according 2014/34/EU Ex marking according
ISO 80079-36 / 80079-37
II 2G
2D Ex h IIC IIIC
T6…T1
T85°C…T450°C
Gb
Db X
Conformity mark
Explosion protection mark
II
Group II equipment is intended for
use in locations with explosive gas
atmospheres, excluding mine gas
and/or dust from hazardous mining
operations.
2G
Equipment group for gases and vapors in
which an explosive atmosphere may
occasionally occur during normal operation.
2D
Equipment group for dusts in which an
explosive atmosphere may occur during
normal operation or for a short period.
Ex h
Marking according to the equipment protection level
for non-electrical equipment in potentially explosive
atmospheres
IIC Suitable for gas atmosphere IIC
IIIC Suitable for combustible suspended solids, non-conductive
and conductive dust
T6…T1
T85°C…T450°C
Maximum surface temperatures which are mainly dependent on the
operating conditions
Gb Equipment protection level for gases containing all potential ignition sources that are
effective, which may occur during normal operation, rare and expected malfunctions.
Db Equipment protection level for dusts containing all potential ignition sources that are
effective, which may occur during normal operation, rare and expected malfunctions.
X Special operating conditions must be observed and can be found in the operating instructions.
EPL Ignition temperature Permissible max. surface temperature
dusts
Db Minimum ignition temperature
for dust clouds T cloud [°C] T max = 2/3 T cloud
Minimum ignition temperature
with dust layers T 5mm [°C]. T max = T 5 mm - 75 K

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3.2 Special operating conditions for safe use in potentially explosive atmospheres
Maintenance work to be carried out, from chap. 9
To avoid possible spark generation due to static charge, the device should always be cleaned with a damp cloth.
The legibility of the nameplates must be checked at regular intervals. It must remain legible throughout the entire
period of use of the device. If a reliable reading is no longer given, please contact the manufacturer.
Impacts on the device must be avoided at all costs. Impacts or shocks can produce sparks.
It is the responsibility of the operator to evaluate attached process components or accessories together with the
delivered device by means of an ignition hazard analysis. The operator must recognize the ignition hazards and
prevent them by using appropriate protective measures.
The operator must comply with the points from chapter 2.3 "Responsibility of the operator".
4 Technical data
For detailed technical data, please refer to the documents in the appendix chapter 12.1
5 Marking of the device
The nameplate with serial number and type designation is located on the housing. The materials used for the wetted
parts as well as other device-specific versions are represented by a type coding on the nameplate and can be broken
down at any time with the aid of the data sheet. The marking for the hazardous areas, in the form of the description of
the type of protection, the permissible ambient temperature and the deposit number, are located in the lower area of
the nameplate.
6 Structure and function
6.1 Overview
1 Bimetallic coil
2 Stem
3 Shaft
4 Process connection
5 Case
6 Pointer
7 Window
8 Ring
6.2 Functional description
The temperature is transferred through thermal conduction onto the bi-metal helix, which is firmly gripped on one side.
Due to its construction, using 2 metals with different coefficients of thermal expansion, it rotates proportionally to the
temperature change. This rotary motion is transferred via a shaft to the pointer. The angle of rotation for the complete
range is approx. 270°.

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6.3 Description of the components
6.3.1 Stem
The stem with a diameter of 6 mm - 9.6 mm and a length of 63 mm - 1500 mm contains the bimetallic coil on the side
facing away from the housing. To ensure proper functioning of the thermometer, a minimum immersion length of the
stem in the media of 65 mm to 100 mm, depending on the measuring range, must be ensured.
If the process medium is also subject to pressure or flow during temperature measurement, a
thermowell has to be used.
6.3.2 Dial with pointer
The thermometer is equipped with a dial and pointer pursuant to EN 13190 or ASME B40.200.
6.3.3 Instrument connection
The instrument connection is located at the back of the instrument and is designed as a threaded or compression
connection. Instrument connections with an every angle connection allow the housing to be aligned according to the
installation situation.
6.4 Accessories
Please contact the manufacturer for information on special sealing materials and accessories.
7 Transportation
The device must be protected against impact. Transport must be carried out exclusively in the glass-break-proof
packaging provided for transport. The device shall only be transported in a cleaned condition (free of residual media).
7.1 Delivery
The delivery is to be checked for completeness and transport damage. In case of transport damage, the delivery is not
to be accepted or only with reservation, the extent of damage is to be noted and, if necessary, a complaint is to be
initiated. In these cases, please contact our service department.
7.1 Storage
The storage of the devices should exclude external influences as far as possible to avoid damage to the devices.
Vibrations or impact effects must be avoided, and the limit values of the storage temperatures must be taken into
account.
Permissible storage temperature: -40 to +60°C

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8 Assembly/Installation
8.1 Preparation
To ensure safe working during installation and maintenance, suitable thermowell must be installed in the system, by
means of which the unit can be
can be removed for repair or inspection within the plant
subjected to a functional check on site.
The suitability of the device and the thermowell (if required) for the medium to be measured, the selection of the
measuring range and the protection against special conditions such as vibrations must be checked.
During assembly/installation work, the system must be secured against being switched on again.
It is recommended to perform the assembly / installation without an existing explosive atmosphere (e.g. ventilated
room).
8.2 Requirements for the installation site
Check the suitability of the device for the process media to be measured,
Design of the measuring range to the requirements of the measurement,
Ex works, the device is supplied and calibrated for vertical installation.
If the installation location deviates from the vertical (max. ± 5°), the zero setting on the indicator must be corrected
(see 8.4.1 Zero adjustment).
Protection against mechanical vibration, e.g. by means of a flexible capillary line.
The following limits must not be exceeded under any circumstances:
Frequency of mechanical vibration: max. 150 Hz
Acceleration: max. 0.5 g (approx. 5 m/s2)
8.2.1 Every angle connection (optional)
Only adjust the every angle connection if this is necessary during fitting or
removal.
Use the every angle connection to place the sensor in the correct position
prior to installation, proceeding as follows:
Position the thermometer housing in a straight alignment (Position “C”)
Using the screws marked “A”, loosen until the joint can be turned freely
through 180° on the lower part of the housing and the sensor.
Hold the thermometer housing firmly with one hand, and with the other hand
turn the joint piece until the inner part of the joint is showing in the desired
direction of bend.
Firmly tighten the aforementioned Screws “A” again.
Loose the screws marked “B” and move the joint into the desired direction of
bend.
Firmly tighten the aforementioned Screws “B” again.
8.3 Process connection
The process connections comply with the general technical regulations for thermometers. Thread types and materials
of the process connections may vary depending on the application..
Assembly of the device only by authorized and qualified personnel.
The device must be integrated into the equipotential bonding of the process installation (e.g. by using an
electrically conductive seal).
Use only with the mechanical process connection provided – regarding the configuration, see order code on the
device type label.

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When connecting the device without using a thermowell, the pipes must be depressurized.
Do not allow any mechanical force to be applied to the stem; in particular, pay attention to matching the "S" lengths
of the thermometer and the thermowell, to avoid contact against the base of the thermowell.
A thermal transfer medium (heat conducting paste) in the thermowell improves the reaction time and reduces the
measurement error caused by the thermal transfer.
Only mount using the correct open-jawed wrench, and do not twist the device itself.
Do not insert moist or oily stem into hot thermowell.
8.4 Starting up
The precondition for start-up is correct installation. All connecting lines must be laid such that no mechanical forces can
act on the device.
8.4.1 Zero adjustment
On thermometers with an external adjustment option, rotate using a screwdriver until the pointer is showing the desired
temperature on the scale.
8.5 Subsequent relocation of the thermometer
Do not disassemble the device from the measuring point in order to mount it at another measuring
point without cleaning it first (cleaning the stem and thermowell). There is a risk of mixing media
with unpredictable chemical reactions.
9 Maintenance
The device is maintenance-free. However, to ensure reliable operation and a long service life of the device, we
recommend that it is checked regularly.
9.1 Function check and recalibration
The check on function and recalibration is carried out at regular intervals, depending on the application. The precise
testing cycles should be adjusted in line with the operating conditions and ambient conditions.
Check on display.
Check the thermowell for damage and seal.
Recommended calibration interval: annual
9.2 Cleaning and maintenance
Cleaning is carried out with a non-aggressive cleaning agent and a damp soft cloth to avoid electrostatic charging. In
the same work process, care can be taken to detect possible damage to the device at an early stage. If any damage is
detected, the unit should be handed over to the manufacturer's service department immediately.

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10 Faults
All defective or faulty equipment must be taken out of service. Defective or faulty devices should be handed over to the
manufacturer's service department immediately. Under no circumstances repair attempts should be made on site.
Device safety can no longer be guaranteed.
Contact details see chap. 1.6
Fault Possible causes Possible measures
Jerky or random pointer movement Bended stem, bended every angle
connection
Check for mounting errors and
installation location.
Replace device if necessary
Bent or loose pointer Damage with transport or external
rough impact
Repair by the manufacturer
Cracked window External influences Repair by the manufacturer
Leakage with filled device High solar radiation, operation
outside the device specification
Repair by the manufacturer
Case damage Improper handling Check installation location,
Device must be replaced
Signs of leakage of the measuring
system (discoloration of the dial or
the filling liquid).
Process media not compatible with
the material used for the thermowell,
installation location with excessive
external influences
Improper use,
Replace device
Adapt thermowell material to
process media
10.1 Behaviour after rectifying the fault
See chapter 8 Assembly and Installation
11 Dismantling & disposal
11.1 Disassembly
During maintenance work on an unit installed without thermowell, the lines must be depressurized and the system
must be secured against being switched on again.
Dismantle the measuring device using a suitable tool.
Residual media in and on dismantled measuring instruments can endanger people, the environment
and equipment. Sufficient precautionary measures must be taken. If necessary, the devices must be
cleaned thoroughly (see notes in the safety data sheets).
11.2 Disposal
At the end of the product life cycle, do not dispose of this product with normal household waste. Take this
product to a collection point or a specialist disposal company for recycling of the components

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With the help of the product coding and our data sheets (see Appendix 12 available on our website) you will receive
the necessary information to be able to carry out a material separation yourself. Our devices described in this manual
are mostly made of stainless steels, which can be recycled. Before disassembling, check if there is a device filled with
silicone oil. This oil must first be drained off and collected in accordance with the safety instructions in the safety data
sheet. Then separate the case ring, which carries the window, from the case using a strap wrench. For device with
crimped housing ring, these can be cut open with a pliers. The sealing ring and flat glass can be removed. Next,
remove the pointer and dial, which are made of aluminium, everything else is made of stainless steel..
Materials to be recycled:
Filling fluid (oil see data sheet)
Stainless steel (case, ring, process connection, stem, bimetallic coil, see data sheet)
Dial and pointer (aluminium)
Window (see data sheet glass or plastic)
Seals (sealing ring of the sight glass, venting device, pressure relief device)
Please help to protect our environment!
Some of the product materials can be reused if you take the product to a collection point or to a waste
management company. By reusing some parts or raw materials from used products, you make an important
contribution to protecting the environment.
Our products are delivered in optimized packaging. This essentially means that materials are used which can be
recycled as secondary raw materials at the local disposal service. For more information on the disposal of packaging,
please contact your local administration.
12 Appendix
12.1 Data sheet Bimetal Thermometer Ax / Ex
Detailed data sheets are available directly from the manufacturer (see 1.6Manufacturer address, customer service).
Model Designation Document
AI, AE, AM, A3B, Stainless steel bimetal thermometer
Model A according to EN 13190
DS BIM AxEx
EI, EE, EM, E3B Stainless steel bimetal thermometer
Model E according to ASME B40.200
DS BIM AxEx
ART, ERT Stainless steel bimetal thermometer
with stepped stem Model ART and ERT
DS BIM-RT

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12.2 EU Declaration of Conformity

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12.3 UK Declaration of conformity

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