Wise T953 User manual

C-QIM-2731-T37_EN_Rev.1
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Explosion proof
temperature switch
T953

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Contents
1. General items...................................................................................................................... 2
1.1 Introduction......................................................................................................................... 2
1.2 Application.......................................................................................................................... 2
1.3 Product Characteristics ...................................................................................................... 2
1.4 Warranty............................................................................................................................. 2
2. Warning............................................................................................................................... 3
3. Main specs .......................................................................................................................... 4
3.1 Explosion-proof................................................................................................................... 4
3.2 Protection grade................................................................................................................. 4
3.3 Basic specs ........................................................................................................................ 4
4. Design ................................................................................................................................. 6
4.1 Structure............................................................................................................................. 6
4.1.1 Basic type........................................................................................................................ 6
4.1.2 Remote type.................................................................................................................... 7
4.2 Principle of operation.......................................................................................................... 8
5. Installation guide ................................................................................................................. 8
6. Wiring .................................................................................................................................. 9
6.1 Type and wiring due to wiring/contact point operation..................................................... 9
6.2 Cautions for wiring............................................................................................................ 10
7. Repair and maintenance................................................................................................... 11
8. User's duties...................................................................................................................... 12
9. Product return.................................................................................................................... 12

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1. General items
1.1 Introduction
The product is a temperature switch with a built-in micro switch.
The switch is composed of the sensor unit that measures the temperature, the control unit that adjusts
the target value, and the temperature as well as the micro switch that output a contact point.
The micro switch is a high-precision product designed for the operation with very small temperature
changes, and it has various rated current values.
Before using the product, make sure to fully familiarize with the user manual that indicates how to
handle each part for the correct use.
1.2 Application
When it reaches the target temperature, the product can be used for On-Off signal-based process
control, alarm, or warning displays, etc.
In addition, it is manufactured in a pressure-resistant and explosion-proofing structure, and thus, it can
be installed in an explosion-proofing area for use.
1.3 Product Characteristics
1) The temperature switch is most suitable for cases where switching is required for temperature.
2) The micro switch can perform a stable opening and closing operation through snap actions.
3) It can be installed in an explosion-proofing area or danger zone for use.
1.4 Warranty
If one causes damage to the product due to failures to comply with the user manual, or if one arbitrarily
remodels it, changes or repairs the product, the manufacturer will not be responsible for it, and the
product warranty period will expire.

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2. Warning
Guide on handling for safe use
For the safe and correct use of the product, make sure to read the handling guide carefully before use.
Handling errors can cause device malfunctions, and it can lead to injury, accidents, etc.
Warning
!
1) For the safety, only a worker with professional skills in electronics and electrical construction is
allowed to install the product.
2) Make sure to use the product within the rated input/output range set in the specifications.
3) Install the product in the environment of use indicated in the specifications.
4) Use the product in the permissible temperature range. If you use it outside the temperature range, it
can cause malfunctions or damage to the temperature switch, thus causing a degradation in the
safety nearby.
5) Do not apply excessive loads, vibrations, or impacts.
6) Do not let the sensor of the temperature meter to get bent. If the sensor gets bent, it can interfere
with the normal operation of the temperature meter, thus it can lead to temperature discrepancies.
7) Do not grab the head and turn it. Using a tool, hold the hexagonal screw parts to turn it.
8) O-ring can cause changes over time or characteristics change, and it can lead to a loss of
necessary functions for sealing, thus it requires periodic replacement, and in general, it is
recommended to replace it every 5 years.
9) When installing it in the site, make sure to follow the guide from the user manual.
10) Do not remodel the product itself or try to add a new function to it.
11) When opening the product case, make sure to turn off the power first. If you do wiring work when
current flows, there is danger of electrical shocks.

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3. Main specs
3.1 Explosion-proof
Model: T953 (953 Series)
Explosion-proofing grade: Ex d IIC T6
II 2G Ex d IIC T6 Gb
Ex d IIC T6 Gb
Explosion-proofing technology criteria: EN60529, IEC529
3.2 Protection grade
IP67
3.3 Basic specs
1) Case/Cover material: Silver gray finished aluminium
2) Stem material: Stainless steel 316
3) Capillary tube length: 2, 3, 5, 8, 10 Meter (Standard: 3 Meter) for other length, contact the
company
4) Setting level: ±1.0 % Of full scale
5) Reproducibility: ±2.0 % Of full scale
6) Range of temperature in use: -40~65 ℃
7) Contact point quantity: 1 X SPDT or 1 X DPDT (independent operation)
8) Contact point capacity:
Rated voltage
Withstand Voltage
Insulation Resistance
Resistance load
Inductive load
125V AC 15A 125V AC 15A
1500V AC for 1min
(Between a case
and aterminal)
Upon 500V DC
100MΩ or above
(Between a case and
aterminal)
250V AC 15A 250V AC 15A
30V DC 2A 30V DC 1A
125V DC 0.4A 125V DC 0.03A

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9) Measurement temperature range:
Adjustable setting range (℃)
Maximum working temperature (℃)
-50 ~ 30 35
-50 ~ 80 90
-10 ~ 65 75
20 ~ 90 95
50 ~ 120 130
100 ~ 170 180
150 ~ 220 230
190 ~ 260 270
230 ~ 300 310
10) Name plate
Explosion-proofing structure and grade: Ex d IIC T6
II 2G Ex d IIC T6 Gb
Ex d IIC T6 Gb
Neighboring temperature condition: -40 °C ≤Ta ≤65°C
Stable certification display, certification information (certification number, , org,
and date) indicated separately on the name plate
Manufacturer address
Tag No.

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4. Design
4.1 Structure
4.1.1 Basic type
The product is a pressure-resistant and explosion-proofing product where its container is designed to
withstand explosive gas or vapor inside it. It is designed to prevent ignition due to external explosive gas
or vapor through the contact plane, inlet part, etc.
The basic type of the product has a process connection part and a sensor that are welded, and the
process connection part can be selected and used depending on the environment of the installation. In
addition, after selecting a proper thermowell for the environment of use, it can be installed together or
directly inserted into the temperature switch.
No. Description
1 Head
2 Micro switch
3 Terminal block
4 Compression fitting
5 Stem

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4.1.2 Remote type
Remote type has an extension cable sticking out below the head and is connected to the sensor.
The part for actual measurement can be put in accordance with the installation location of the sensor to
adjust the distance between the measurement unit and the head.
The extension cable is generally made of insulated stainless steel.
No. Description
1 Head
2 Micro switch
3 Terminal block
4 Compression fitting
5 Stem
6 Flexible tube

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4.2 Principle of operation
As shown in the below figure, a diaphragm is used as a temperature measurement device.
The displacement of the diaphragm due to the temperature change is delivered through the rod to the
lever, thus opening and closing the micro switch.
5. Installation guide
1) Before installation, make sure to check the product for damage and the process status.
2) Periodically inspect the installation location in terms of wetness, vibration, dust, corrosive gas, etc.
3) Avoid a location with temperatures exceeding the temperature range defined in the user manual.
4) Make sure to evacuate properly to prevent lightning or vapor.
5) Avoid a location with direct sunlight.
6) When installing it in the panel or wall using an assembly hole, make sure to use M5 nuts and bolts,
and in case of using mounting tools, make sure to firmly install it.
7) During installation, if there is a temperature difference between the locations of the sensor and the
capillary tube, it is not possible to measure the temperature accurately, therefore, make sure to
protect the capillary tube.
8) Fix screws (bolts and nuts) by using the designated torque and tools.
No. Description
1 Diaphragm
2 Spring
3 Load
4 Micro switch

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6. Wiring
6.1 Type and wiring due to wiring/contact point operation
1) High alarm
1:1 contact point type, If the temperature reaches the target
temperature, then turn on the circuit.
Cancel the circuit if the temperature drops below the target
temperature.
2) Low alarm
1:1 contact point type, If the temperature reaches the target
temperature, then turn on the circuit.
Cancel the circuit if the temperature drops over the target
temperature.

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6.2 Cautions for wiring
1) Do not apply excessive force to the main body.
2) Use vinyl insulation cables, cap tier cables, etc., adequately for the load.
3) Make a firm connection to the terminal board using an M4 compression terminal.
4) Make sure to wire it after checking the contact point format on the wiring diagram.
5) Grounding
-Use the grounding terminal made of aluminum material for corrosion prevention.
-Use the grounding bolt made of 304SS materials.
-Use a spring washer to prevent looseness of the grounding terminal.
-After checking the joint, connect a proper grounding cable to the external grounding terminal.
6) After making a connection, check if the power supply and the signal cable are connected properly.
7) In case of conduit type, use a sealing fitting that passed the explosion-proofing verification test.
8) In case of cable gland type, use a cable gland that passed the explosion-proofing verification test.
9) Make sure to use the grounding wire with a thickness of 0.7 sq or greater.

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7. Repair and maintenance
1) Use it in a temperature that is no more than 75% of the max scale reading.
2) Do not apply temperatures out of the temperature range.
3) Avoid sudden temperature change.
4) Do not inject fuel into the driving unit within the temperature meter.
5) Periodically check the product for normal operation at least once or twice every 6 months.
6) If the setting error is big, then disassemble the product for inspection.
7) If the adjustment cannot be made with a zero point control device, then contact the company.
8) The product can malfunction due to each part's abrasion, corrosion, external vibration, or impact
that causes distortions. In this case, you need to remove the cause, make an adjustment, or
replace parts.
9) Use the rated current according to the standard in 3.3) but in case of the built-in micro switch, it
may differ, thus consider some margins based on the rush current within the range of rated current
for the product.
10) The micro switch's contact resistance will increase gradually as time passes. Especially, in case of
contact point operation in an environment with silicon, light load can lead to an accumulation of
SiCO2 in the contact point, thus causing a sudden increase in the contact resistance. Therefore,
make sure to ventilate properly, or use it in the clean environment. Especially, if used for inputs to
the control sequence, it can cause contact point failure, thus make sure to use the 110/220V buffer
relay.
11) When opening the cover to repair or inspect the temperature meter, then first make sure to turn off
the power. If the switch malfunctions, there is a chance of ignition due to explosive gas coming into
the temperature meter, so be cautious.

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8. User's duties
1) Incorrect installation can eventually lead to an inaccurate reading of temperature.
2) During use, if one causes damage to the product due to failures to comply with the user manual, or
if one arbitrarily remodels, changes or repairs the product, the manufacturer will not be responsible
for it, and the product warranty period will expire.
3) Wise can support users’ selection but will not be responsible for them in any sort of way.
9. Product return
1) If the product gets returned for recalibration or repair work, make sure to use the original packaging
or safe packaging method, and also make sure to return the related documents.
2) Make sure to prevent exposures of the product to dust, wetness, or other sources of pollution
during the conveyance.
3) Pack it properly to prevent vibration or any kind of impact during the conveyance.
4) If the product gets damaged during the conveyance, make sure to record it on paper, and if there is
some kind of loss due to a delayed installation, one may demand compensation from the
conveyance company.

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The content of the user manual is prepared with the best efforts, but it might contain typos, or errors requiring
fixes, so we kindly ask for understanding. The product spec or exterior can be changed without a pre-notice for
the quality improvement purposes, thus Wise has the rights to change them. Figures used in the user manual
are for just illustration purposes, and they can differ from the actual shapes.
Yongin Factory
2022 Deogyeong-daero,Giheung-
gu,Yongin-si,Gyeonggi-do (Sanggal-
dong)
www.wisecontrol.com
A/S
related Inquiries
2022 Deogyeong-daero,Giheung-
gu,Yongin-si,Gyeonggi-do (Sanggal-
dong)
[e-mail]
Home page : Service
center>Technology/Quote Inquiry
WISE Seoul Office
181, Gasan digital 1-ro, Geumcheon-gu,
Seoul (Gasan-dong, Gasan W CENTER)
F19
T. 02-300-2300
F. 02-300-2400

C-QIM-2731-T37_KR_Rev.1
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Explosion proof temperature switch
T953

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목차
1. 일반사항 ............................................................................................................................... 2
1.1 소개 .................................................................................................................................... 2
1.2 적용.................................................................................................................................... 2
1.3 특징.................................................................................................................................... 2
1.4 보증.................................................................................................................................... 2
2. 경고...................................................................................................................................... 3
3. 주요사양 ............................................................................................................................... 4
3.1 방폭.................................................................................................................................... 4
3.2 보호 등급 ........................................................................................................................... 4
3.3 기본사양 ............................................................................................................................. 4
4. 설계...................................................................................................................................... 6
4.1 구조.................................................................................................................................... 6
4.1.1 기본 타입......................................................................................................................... 6
4.1.2 리모트 타입 ..................................................................................................................... 7
4.2 원리.................................................................................................................................... 8
5. 설치 지침 ............................................................................................................................. 8
6. 배선...................................................................................................................................... 9
6.1 접점의 작동에 따른 종류 및결선 ...................................................................................... 9
6.2 배선 주의사항 .................................................................................................................. 10
7. 유지 보수 ........................................................................................................................... 11
8. 사용자 의무........................................................................................................................ 12
9. 제품의 반환........................................................................................................................ 12

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1. 일반사항
1.1 소개
본제품은 마이크로 스위치가 내장된 온도 스위치입니다. 스위치는 온도를 측정하는 센서부, 설정값과 온
도를 조절하는 제어부, 접점을 출력하는 마이크로 스위치로 분류합니다. 마이크로 스위치는 미세한 온도
변화에도 작동되도록 설계된 고정밀 제품으로 다양한 정격 전류값을 갖고 있습니다. 본제품을 사용하고
자하면 각각의 취급 요령을 기재한 본사용설명서를 숙지하시고 바르게 사용하여 주시기 바랍니다.
1.2 적용
본제품은 설정된 온도에 도달하였을 때온, 오프(On-Off) 신호에 따른 프로세스 제어, 이상 경보, 또는
경고 등의 표시에 사용할 수있습니다. 또한 내압 방폭 구조로 제작되어 방폭 지역에 설치하여 사용할 수
있습니다.
1.3 특징
1) 온도 스위치는 온도에 따른 스위치 기능이 필요한 경우에 가장 적합합니다.
2) 마이크로 스위치는 스냅 액션(Snap action)에의해 안정된 개폐 동작을 할수있습니다.
3) 방폭 지역 또는 위험지역에 설치하여 사용할 수있습니다.
1.4 보증
본제품을 사용하실 때사용설명서의 규정에 따르지 않아 발생하는 파손이나 임의 개조 및변경, 수리 시
에는 제조사에서 책임을 지지 않으며 제품의 보증기간은 종료됩니다.

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2. 경고
안전한 사용을 위한 취급설명서
이제품을 바르고 안전하게 사용하기 위하여 사용 전에 이취급설명서를 잘읽어주시기 바랍니다.
취급시의 오류는 기기고장의 원인이 되며, 상해나 사고 등의 재해가 발생할 수있습니다.
경고!
1) 안전을 위해 설치는계장, 전기공사 등의 전문기술을 보유한 작업자가 실시하여야 합니다.
2) 사양서에 정해져 있는 정격 입출력사양의 범위 내에서 사용하십시오.
3) 본제품은 사양서에 명시되어 있는 사용 환경에 설치하십시오.
4) 사용 가능한 온도 범위 내에서 사용하십시오. 사용 온도 범위를 초과하여 사용할 경우 온도스위치의
고장이나 파손으로 주위 안전에 영향을 미치는 원인이 됩니다.
5) 무리한 하중, 진동, 충격을 가하지 마십시오.
6) 온도계의 감지부가 휘어지지 않도록 주의하십시오. 감지부가 휘면 온도계의 정상적인 작동을 방해하
므로 온도 편차의 원인이 됩니다.
7) 본제품의 헤드를 잡고 돌리지 마십시오. 공구를 사용하여 나사 육각부위를 잡고 돌리십시오.
8) 경년 변화 및시간에 따른 변화를 가져오는 오링은 실링에 필요한 기능을 상실할 수있으므로 정기
적인 교체가 필요하고 통상적으로 5년주기로 교체하는 것이 적합합니다.
9) 현장 설치 시반드시 사용설명서의 설치 요령에 따라 설치하여 주십시오.
10) 제품 자체의 개조 또는 새로운 기능을 추가하기 위한 개조 등은 하지 마십시오.
11) 본제품의 케이스를 열때에는 반드시 사전에 전원을 차단하십시오. 전류가 통할 때배선 작업을 하
면감전의 위험이 있습니다.

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3. 주요사양
3.1 방폭
모델명: T953 (953 Series)
방폭 등급: Ex d IIC T6
II 2G Ex d IIC T6 Gb
Ex d IIC T6 Gb
방폭 기술 기준: EN60529, IEC529
3.2 보호 등급
IP67
3.3 기본사양
1) 케이스/커버 재질: Silver gray finished aluminium
2) 감지부 재질: Stainless steel 316
3) 모세관 튜브 길이: 2, 3, 5, 8, 10 Meter (표준: 3 Meter) 기타 길이는 본사 문의
4) 설정정도: ±1.0 % Of full scale
5) 재현성: ±2.0 % Of full scale
6) 사용 온도 범위: -40~65 ℃
7) 접점 수량: 1 X SPDT or 1 X DPDT (각각 독립 작동)
8) 접점 용량:
정격전류
내전압
절연저항
저항부하
유도부하
125V AC 15A
125V AC 15A
1500V AC 1분간
(케이스와 단자간)
500V DC 인가 시
100MΩ이상
(케이스와 단자간)
250V AC 15A
250V AC 15A
30V DC 2A
30V DC 1A
125V DC 0.4A
125V DC 0.03A

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9) 측정 온도 범위:
Adjustable setting range (℃)
Maximum working temperature (℃)
-50 ~ 30
35
-50 ~ 80
90
-10 ~ 65
75
20 ~ 90
95
50 ~ 120
130
100 ~ 170
180
150 ~ 220
230
190 ~ 260
270
230 ~ 300
310
10) 명판(Name plate)
방폭 구조 및등급: Ex d IIC T6
II 2G Ex d IIC T6 Gb
Ex d IIC T6 Gb
주위온도 조건 : -40 °C ≤Ta ≤65°C
안정 인증 표시, 인증정보(인증번호, 인증기관, 인증일자) 명판에 별도 명시
제조사 주소
Tag No.(식별번호)