IECEx FI-ST4 Series User manual

Name of the product : Temperature Sensor
User's Guide
REV 0
Date : 2021 , 03 , 21
Document number : FI-2021-0321
FINE ENG CO.
Address : 507Ho E-Dong, 30, SongdoMirae-ro,Yeonsu-gu,
Incheon Metropolitan City, Korea
TEL: [phone]
Fax : [phone]

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Table of Contents
1. Technical details…………………………………………………………………………..2
1.1 Product specifications.…………………………………………………………………………………………2
1.2 Product introduction and configuration……………………………………………………………..3
1.3 Plates (Display of mandatory safety certification)……………………………………………….4
1.4 Marking of Handle Cautions.………………………………………………………………………………4
2. General matters…………………………………………………………………………..5
2.1 Scope of application……………………………………………………………………………………………5
2.2 scope of supply…..………………………………………………………………………………………………..5
2.3 Product transportation..……………………………………………………………………………………….5
2.4 Installing the product…………………………………………………………………………………………..6
2.5 Machine Operation and Precautions..…………………………………………………………………7
3. Maintenance and Management.……….………………………………………..8
3.1 Inspection and Coordination………………………….……………………………………………………8
3.2 Maintenance and repair.………………………………….…………………………………………………..9
3.3 Quality Assurance..…………………………………………….……………………………………………….12
3.4 User's liability limit…………………………………………….……………………………………………….12
3.5 Safety certification…………………………………………………….……………………………………….12
3.6 International Precision Standards..………………………….…………………………………………13
3.7 Drawing list…………………..………………………………………….………………………………………….14
3.8 Reference documents (Report)……………………………….…………………………………..………15

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1 Technical details
1.1 Product specifications
1.1.1 Product name : Temperature Sensor
1.1.2 Model name : FI–ST4-*
1.1.3 Product Overview : This product is a temperature sensor that measures fluid
temperature by embedding RTD-PT100 sensor.
1.1.4 Product specifications
Model Name FI-ST4-*
Explosion-proof rating II 1G Ex ia IIC T4…T6 Ga
Ambient Temperature -20℃ ~ +50℃/+65℃/+100℃
Process Temperature
T6 : -20℃ ~ +50℃
T5 : -20℃ ~ +65℃
T4 : -20℃ ~ +100℃
Rating DC 3 V under, 300 mA under
Sensor Type PT 100Ω
Lead Length Max50,000
Electric Strength Insulation Test at 500 Vac, 60sec
Material
Protection Tube SUS 304 / SUS 316
Spring SUS 304 / SUS 316
Metal Braid Tinned Copper
International Protection IP 20
Epoxy 832HT (Black)
1.1.5 Overview of the explosion-proof rating
Ex This device is a explosion-proof device.
ia The device is designed by applying a non-ignition explosion-proof structure.
IIC Can be installed in the place where gas corresponding to gas category IIC is used
T6..
T4
T6...T4 temperature grade applied according to the temperature range of the measured
fluid.
1.1.5.1 Barometric pressure : 80kPa ~ 110kPa
1.1.5.2 Ambient temperature : -20℃ ~ +50℃/+65℃/+100℃
1.1.5.3 Humidity : not more than 95%
1.1.5.4 Installation location : indoor or outdoor
1.1.6 Application Criteria : Mandatory safety certification notice for protective devices(Notice No. ISO
9001:2015 & ISO/IEC 80079-34)
1.1.7 Installation criteria : IEC 60079-14
Applicable standard :
IEC 60079-20:2017, IEC 60079-11:2011, EN IEC 60079-0:2018, EN 60079-11:2012
* Specific conditions of use.
i. The equipment is intended to be connected with Zener barrier. It shall be taken into account
to follow IEC 60079-14 when installing by the user/installer.
ii. The equipment shall not be instalied in a location where the external conditions are
conductive to the build-up of electrostatic charge on the enclosure surface. In addition, the
equipment shall only be cleaned with a damp cloth.
iii. The flying leads of the temperatyre sensor must be terminated within an enclosure which
provides a degree of protection of at least IP20 with protection suitable for area of installation.

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1.2 Product introduction and configuration
1.2.1 For all the BOLT,NUT, SCREW, WASHER materials used during assembly, STAINLESS STEEL
(SUS304) was used.
1.2.2 The "O" type terminal shall be used to maintain the performance of the instrument
except in special circumstances when the power LINE is engaged.
1.2.3 Maintenance and repair shall be performed after disconnecting the power and ensuring
that there is no explosive gas atmosphere.
1.3 Plates (Display of mandatory safety certification)
1.3.1 Plates (Display of mandatory safety certification)
1.3.1.1 Product name : Temperature Sensor
1.3.1.2 Model name : FI – ST4 – ( S , M , PT )
PT Thread Type
Meter Thread Type
Standard Type
Released sequence
Type of sensor
Company English abbreviation
1.3.1.3 Explosion-proof structure : II 1G Ex ia IIC T4…T6 Ga
1.3.1.4 Ambient Temperature : -20℃ ~ +50℃/+65℃/+100℃
1.3.1.5 Certification Number :
1.3.1.6 Serial Number :
1.3.1.7 Manufacturer name : Fine Eng co.
1.4 Marking of Handle Cautions
1.4.1 Care should be taken when handling the device as the impact on the device may reduce
the explosion-proof performance.
1.4.2 Do not arbitrarily disassemble areas that affect the performance of explosion-proofing.
1.4.3 When maintaining or repairing a product, turn off the power before working.

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2General matters
2.1 Scope of application
This product is part of Group II, which targets gas and steam in general workplaces and
chemical plants, and can be installed and used in Zone 2.
2.2 Supply Range
All Supply Inclusion Model names
2.2.1 Supply not included
2.2.1.1 Foundation work, installation work
2.2.1.2 Acquisition, handling, and storage in the field
2.2.1.3 Access to external wires and grounds (including EARTH LUG)
2.3 Product transportation
2.3.1 Transpor t
2.3.1.1 Packaging method and packing specification
2.3.1.1.1 After removing foreign substances from the inside and outside of the product,
it was completely cleaned and dried, and the parts that were not handled in a
proper manner were treated in a proper manner.
2.3.1.1.2 Packaging shall be rigidly aligned with the size and weight of the contents, and
shall be properly protected against rust and corrosion by using materials that
can be buffered, such as air caps and newspapers.
2.3.1.2 Transport method
2.3.1.2.1 In principle, packaged products shall be delivered directly by the manufacturer
or by means of transportation designated by the manufacturer, and parcels
shall be used in island areas and islands mountainous areas.
2.3.1.2.2 When transporting a product, if it is thrown or piled high due to the weight of
the product itself, it may damage the product, so it must be transported using
appropriate protective measures or equipment.
¾We are packing this product with utmost care, but there may be loss of contents or
damage in the transportation process, so please check the condition of the contents after
you take over the product.
¾If there are any defects in the contents, please contact us immediately for action.
¾Please contact the customer service center if there is a loss, damage, or deterioration of
quality due to improper packaging by the manufacturer.

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2.4 Installing the product
2.4.1 Assembly and Demolition
2.4.1.1 This product is delivered in a fully assembled form at the time of shipment and does
not require user assembly or disassembly. (Requires construction site runoff)
2.4.1.2 On-site construction shall be carried out by a qualified person or professional
electrician approved by the vendor.
2.4.2 Installation and precautions
2.4.2.1 Installation method
2.4.2.1.1 Verify that the power is off.
The cables of this product shall be used for exposure, and the final line shall be
constructed by a qualified person or a professional contractor approved by the
vendor.
2.4.2.1.2 Other wiring methods are in accordance with KSC IEC 60079-14.(Junction Box
piping construction only)
2.4.2.1.3 The remaining holes except the required piping holes shall be closed with
PLUG.(Junction Box piping construction only)
2.4.2.2 Cautions
2.4.2.2.1 When installing an explosion-proof electrical device, the following specifications
shall be compared to the technical specifications to verify that they are
consistent:
a) Rated voltage and current rated
frequency f) Explosion grade
b) Protection grade of container g) Temperature grade
c) Attachment method and attachment
type h) The location of the ingress
d) Ambient environment i) Dimensions of screw
e) Types of explosion-proof structures j) Entry method
2.4.2.2.2 The installation of electrical equipment in the explosion-proof area shall take
into account the following:
① Install the machine in a convenient location for operation and adjustment.
② Make sure that it is installed in an easy-to-maintain location and that space is
available for inspection or maintenance.
③ If possible, select a location that is not exposed to moisture or moisture, and
avoid installing it in a humid place.
④ If possible, do not install it in front of or above the exit where the corrosive gas
outlet and corrosive liquid dissipates.
⑤ The installation shall be avoided in a location that may be affected by significant

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vibration from mechanical devices, etc.
⑥ The installation method and installation type shall comply with the conditions of
use of the explosion-proof electric device.
⑦ Bolts, nuts, gold tools, etc. used for installation shall have sufficient mechanical
strength, and materials and surface treatment according to the characteristics of
the installation site shall be used.
⑧ Exposed charging parts should not occur.
2.4.2.2.3 The installation shall be suitable for the intended use of the place of use.
2.4.2.2.4 This product shall be installed so that the withdrawal line is separated at the
highest temperature when the target of measurement is high temperature, and
it cannot be directly contacted by the high temperature area, and the operator
shall be instructed and trained to ensure safe installation.
2.4.2.2.5 The operator shall be instructed and trained to ensure safe installation so that
excessive force is not applied to the connector on which this product is
withdrawn.
2.4.2.2.6 When transporting this product, do not over-impact the equipment and
components installed inside and outside, and provide the operator with
knowledge and training prior to installation to ensure safe installation.
2.4.2.2.7 During the installation process of this product, the power shall be turned off to
prevent safety accidents such as electric shock and other equipment
malfunctions, and the operator shall be instructed and trained before
installation to ensure safe installation.
2.4.2.2.8 Due to the nature of this product, the EARTH LINE is not configured separately,
so EARTH should be grounded using the terminal EarthBolt.(This product is
installed by attaching it to pipes with existing ground, so no internal/external
grounding is required.)
Be sure to contact the manufacturer for any questions regarding the installation
of this product.
2.5 Machine Operation and Precautions
2.5.1 Operating method
2.5.1.1 Check the connections and metal pipes of the cables installed on the product.
2.5.1.2 Apply power to installed products.
2.5.1.3 Verify normal operation.
2.5.2 Precautions for caution
2.5.2.1 Before using the product, be sure to read the user manual and use and install the
product in the prescribed manner.
2.5.2.2 This product shall be constructed by a qualified professional electric contractor.

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3Maintenance and Management
3.1 Inspection
3.1.1 General
3.1.1.1 Perform an initial inspection before operating the facility or equipment.
3.1.2 Inspection grade
3.1.2.1 Inspection grade includes visual, close, or detailed inspection.See Figure 1,
Tab le 1.
3.1.2.2 Visual inspection and close inspection can be performed with the instrument
energized.Detailed inspections are usually carried out with the instrument
turned off.
3.1.3 Inspection type
3.1.3.1 Initial inspection verifies that the explosion-proof structure and installation
conditions of the equipment are appropriate.
3.1.3.2 Regular visual inspection or detailed inspection shall be conducted according
to Table 1, and additional detailed inspection may be required depending on
visual or close regular inspection.
3.1.3.3 Samples shall be inspected visually, closely or in detail, and the size and
composition of all samples shall be determined according to the purpose of
the inspection.
3.1.3.4 Continuous supervision using visual or close inspection in Table 1 shall be
conducted by skilled personnel. In the case of facilities that cannot be
continuously supervised, regular inspections shall be conducted, and the
results of all initial, regular, and sample inspections shall be recorded and
kept.
3.1.4 Staff
3.1.4.1 Understand the risk location classification, expertise, subject of inspection,
and risk location.
3.1.4.2 Ensure that you have technical knowledge and understanding of the
theoretical and substantive requirements and installation-related requirements
of electrical equipment and facilities used in explosion hazard locations.
3.1.4.3 Understand the visual, proximity and detailed inspection requirements related
to installed equipment and equipment.

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3.2 Maintenance and repair
3.2.1 Periodical grade and frequency of regular inspection shall be determined by
considering the factor, dangerous place classification, previous inspection results
if the equipment type, manufacturer's instructions are not met.
If there is an inspection grade and cycle for similar equipment, plants, and
environment, the inspection plan shall be utilized and the regular
inspection shall not exceed three years without expert advice.
3.2.2 When installing this product, be careful not to cause excessive bending or
deformation that can cause damage or damage, and install the product in
accordance with appropriate working procedures.
3.2.3 In particular, this product must be careful because cracks may occur on the
sealing part of the sith, and do not apply any deformation or physical force to
the area.
3.2.4 In order to use this product safely within the temperature rating range, it must
be applied and used in accordance with the ambient temperature and process
temperature.
3.2.5 If there is a possibility of explosive gas atmosphere at the site where this
product is installed, do not terminate the wire or arbitrarily cut or remove the
cover.
3.2.6 Maintenance and modification of items not included in the manual of this
product must be made in contact with the manufacturer for safe and proper use
for this purpose.

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3.2.7.Regular inspection items in Table 1 shall be classified according to the procedures in Figure 1.
Figure 1 Regular inspection procedure

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3.2.8 Continuous management is performed through regular inspection according to Table 2.
Table 2 Inspection items for electrical equipment with explosion-proof structure_”d, e, n”
Ex “d” Ex “e” Ex “n”
Content
Inspection grade
D
e
t
a
i
l
s
P
r
o
x
I
m
i
t
y
N
a
k
e
d
e
y
e
D
e
t
a
i
l
s
P
r
o
x
I
m
i
t
y
N
a
k
e
d
e
y
e
D
e
t
a
i
l
s
P
r
o
x
I
m
i
t
y
N
a
k
e
d
e
y
e
A Instrument
1 The instrument meets the requirements of the EPL in that
location. o o o o o o o o o
2 Device groups are appropriate. oo o o o o
3 The temperature rating of the device is appropriate. oo o o o o
6 There is no unauthorized alteration. o o o
7 There is no unauthorized change to the naked eye. oo o o oo
13 The electrical connections are well coupled without slack. o o
15 Internal shut-off and sealing devices are not damaged. o
B Environment
1 No excessive accumulation of dust or mud. o o o o o o o o o
2 The device is adequately protected from corrosion, weather,
vibration and other adverse conditions. o o o o o o o o o
3 The electrical insulator is clean and dry. o o
When inspecting each electric device with a explosion-proof structure, do not open it during power
supply. After performing maintenance of the appliance, observe or inspect the inspection items in
Table 1 before applying power, and use it after assembling the product for the first time.
3.2.9 Cautions
3.2.9.1 Do not open the main body(cover) of the explosion-proof electric device when
performing an inspection while energizing.
3.2.9.2 When performing repairs in a explosion-proof area, be careful not to cause shock
flames from tools, etc.
3.2.9.3 When performing maintenance and repair, disassembly and assembly work related to
the explosion-proof electrical equipment shall be carried out, so that the explosion-
proof performance shall not be lost not only to repair the target but also to other
parts.
3.2.9.4 If maintenance and fault diagnosis cannot be handled or determined by the user,
contact the manufacturer.
3.2.9.5 “Connect cables in non-explosive areas”

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3.3 Quality Assurance
3.3.1 Warranty period
3.3.1.1 The warranty period for the product is one year based on the date of sale.
3.3.1.2 This warranty is only valid in China.
3.3.1.3 Before using the product, be sure to read the manual and use it in the prescribed
manner.
3.3.1.4 We are not responsible for any accidents or other incidents caused by non-qualified
workers, such as breakdowns, damage, or careless handling.
3.3.2 Paid service
3.3.2.1 Failure and breakage due to careless handling of users
3.3.2.2 Failure or damage caused by modification or repair by the head office and persons
other than the handler
3.3.2.3 Failure or breakage due to abnormal power supply and poor connection equipment
3.3.2.4 Failure and damage caused by natural disasters (fire, salt, earthquake, storm and
flood, lightning, artificial impact, etc.)
3.3.2.5 A/S(Free service) and contact information
TEL: [phone], FAX: [phone]
3.3.2.6 If a fault occurs in the normal handling of this product, please check the place of
purchase for diagnosis.
3.3.2.7 If a failure occurs during normal handling, the place of purchase will repair or
exchange the same product during the warranty period.
3.3.2.8 If the repair service is not processed quickly or is inconvenient, please call our
customer service office and we will notify you of the results as soon as possible.
3.4 User's liability limit
Please be aware of and use the contents of the user manual, and we will not be
responsible for any arbitrary adjustment or use.
3.5 Safety certification
This product has obtained the safety certification of the protective device's obligation
safety (ISO 9001:2015 & ISO/IEC 80079-34).

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3.6 International Precision Standards ( Tolerance Grade )
It is defined as Class B and Class A as follows.
Calibration
Internation Tolerance Standards
N,I,S,T Monograph 175 Revised to IST-90,IEC 751_1983
And KS C1603-1991
Class A Class B
Pt100 ±(0.15+0.002 x t℃) ±(0.3+0.005 x t℃)
-200℃ ±0.55℃ ±1.3℃
-100℃ ±0.35℃ ±0.8℃
0℃ ±0.15℃ ±0.3℃
100℃ ±0.35℃ ±0.8℃
200℃ ±0.55℃ ±1.3℃
300℃ ±0.75℃ ±1.8℃
400℃ ±0.95℃ ±2.3℃
500℃ ±1.15℃ ±2.8℃
600℃ ±1.35℃ ±3.3℃
*Interdial line and standard winding method (Wiring Method)
Internal wires connect nickel lines from side temperature resistance elements
toterminal heads.
To prevent insulation and short circuit between internal wires, glass fiber is
usedfor low temperature and ceramic is used for high temperature.