Wise RS Series User manual

C-QIM-2731-T26_EN_Rev.1
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Explosion proof
thermocouple & RTD
RS series
R920 series

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C-QIM-2731-T26_EN_Rev.1
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Contents
1. General items...................................................................................................................... 2
1.1 Introduction.........................................................................................................................2
1.2 Application.......................................................................................................................... 2
1.3 Warranty.............................................................................................................................2
2. Warning............................................................................................................................... 3
3. Main specs..........................................................................................................................4
3.1 Explosion-proof...................................................................................................................4
3.2 Protection grade.................................................................................................................4
3.3 Temperature sensor types .................................................................................................4
3.4 Accuracy and tolerances.................................................................................................... 4
4. Design................................................................................................................................. 6
4.1 Structure.............................................................................................................................6
4.1.1 Spring loaded type ..........................................................................................................6
4.2 Head................................................................................................................................... 6
4.3 Detector unit and process connection unit material...........................................................7
4.4 Process connection unit..................................................................................................... 7
4.4.1 Sheathed cable (MI cable) type....................................................................................... 7
4.5 Relationship between process connection unit length and head temperature increase.... 8
5. Installation guide .................................................................................................................9
5.1 Pre-installation checks and precautions.............................................................................9
5.2 Installation requirement......................................................................................................9
6. Wiring ................................................................................................................................11
6.1 Extension & compensation wire....................................................................................... 11
6.1.1 Thermocouple(TC) ........................................................................................................11
6.1.2 Resistance thermometer detector(RTD)....................................................................... 11
6.2 Precaution for wiring.........................................................................................................12
6.3 Terminal block wiring........................................................................................................13
6.3.1 Thermocouple (TC) ....................................................................................................... 13
6.3.2 Resistance thermometer detector (RTD)...................................................................... 13
6.4 International color code table...........................................................................................14
7. Name plate........................................................................................................................15
7.1 Name plate indications..................................................................................................... 15
8. Repair and maintenance...................................................................................................16
9. Defect................................................................................................................................ 16
10.User’s duties......................................................................................................................17
11.Product return.................................................................................................................... 17

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1. General items
1.1 Introduction
WISE Control Inc. temperature sensors and thermowells are precisely fabricated according to
customer specifications. The RS series (R920) is an explosion-proof product designed as a spring
roded type to maximize heat transfer between the detector unit and thermowell. The products must be
tested and stored in appropriate locations, and the requirements provided in the documentation, test
reports and handling manuals, etc., must be adhered to in order to maintain optimum state during the
duration of use.
1.2 Application
Temperature sensors are used for temperature measurements in various processes. Measured values
are used for indication, recording and control in control panels or process systems. Depending on the
process situation, an appropriate thermowell may be selected and used, or a temperature sensor may
be inserted directly into a pipe without a thermowell. The thermowell is designed to protect a
thermometer or temperature sensor from fluid flow velocity, pressure and corrosion, etc., inside pipes.
The design prevents leakage of fluid from inside the pipe when a malfunctioning sensor is being
replaced. The user is responsible for selecting the appropriate thermowell for the process at hand.
WISE Control Inc. may provide advice when selecting products, but will not be held liable for mis-
selection of product.
1.3 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) Install wiring in accordance with the indoor wiring provisions and the Technical Standard for
Electrical Installations.
5) Make sure power has been cut off before performing wiring work.
6) Use wires with a sheath-insulated crimp terminal at the end.
7) Cable glands of the same explosion proof grade or higher.
8) Do not disassemble the product under any circumstances.
9) Use the product in the permissible temperature range.
10) Do not apply excessive loads, vibrations, or impacts.
11) When selecting a thermowell for the product, select a thermowell appropriate to the usage
conditions and environment.
12) The customer is responsible for mis-selection of thermowells.
13) Do not grab the head and turn it. Using a tool, hold the hexagonal screw parts to turn it.
14) 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.

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3. Main specs
3.1 Explosion-proof
Model: R920 (RS series)
Explosion-proofing grade: Ex d IIC T6
Ex tD A21 T85℃
Explosion-proofing technology: IEC 60079-0, IEC 60079-1, IEC 61241-0, IEC 61241-1
3.2 Protection grade
IP65
With thermowell : IP66, IP67
3.3 Temperature sensor types
Thermocouple (TC): K, E, J, T, N, B type
Resistance thermometer detector (RTD): Pt100Ωat 0℃
3.4 Accuracy and tolerances
Thermocouple (TC)
Class 1, Class 2 (DIN/IEC584-2, BS/EN60584-2, JIS C1602)
Special, Standard (ASTM E230, E988, ISA-MC96.1)
Resistance thermometer detector (RTD)
Class A : ± (0.15 + 0.002 l t l)
Class B : ± (0.3 + 0.005 l t l)
Please consult the table below for details.

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1) Thermocouple (TC): Class 1,2,3(IEC/EN 60584-2) or Standard / Special(ASTM E230, ANSI MC 96.1)
Type
Class
Temperature range
Maximum deviation
K
Standard
-200 ~ 0 ℃
The greater of ±2.2 ℃or ±2%
0 ~ 1260 ℃
The greater of ±2.2 ℃or ±0.75%
Special
0 ~ 1260 ℃
The greater of ±1.1 ℃or ±0.4%
E
Standard
-200 ~ 0 ℃
The greater of ±1.7 ℃or ±1%
0 ~ 870 ℃
The greater of ±1.7 ℃or ±0.5%
Special
0 ~ 870 ℃
The greater of ±1.0 ℃or ±0.4%
B
Standard
870 ~ 1700 ℃
±0.5%
Special
870 ~ 1700 ℃
±0.25%
R
Standard
0 ~ 1480 ℃
The greater of ±1.5 ℃or ±0.25%
Special
0 ~ 1480 ℃
The greater of ±0.6 ℃or ±0.1%
S
Standard
0 ~ 1480 ℃
The greater of ±1.5 ℃or ±0.25%
Special
0 ~ 1480 ℃
The greater of ±0.6 ℃or ±0.1%
N
Standard
0 ~ 1260 ℃
The greater of ±2.2 ℃or ±0.75%
Special
0 ~ 1260 ℃
The greater of ±1.1 ℃or ±0.4%
T
Standard
-200 ~ 0 ℃
The greater of ±1.0 ℃or ±1.5%
0 ~ 370 ℃
The greater of ±1.0 ℃or ±0.75%
Special
0 ~ 370 ℃
The greater of ±0.5 ℃or ±0.4%
J
Standard
0 ~ 760 ℃
The greater of ±2.2 ℃or ±0.75%
Special
0 ~ 760 ℃
The greater of ±1.1 ℃or ±0.4%
*Note.
Each model has different certification types. See “3.3 Temperature sensor types” and look up the
certifications for the applicable type in the table.
2) Resistance thermometer detector (RTD): Class A, B (IEC/EN 60751)
Tolerance
class
Temperature range of validity (°C)
Tolerance value (℃)
For wire wound resistors
For film resistors
A
-100 to +450
-30 to +300
± ( 0.15 + 0.002 | t | )
B
-196 to +600
-50 to +500
± ( 0.3 + 0.005 | t | )

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4. Design
4.1 Structure
4.1.1 Spring loaded type
In the spring-loaded type, a spring is installed inside the head, and the load from the spring allows the
sensor to maintain maximum contact. Detection response time is faster compared to the basic type.
Spring-loaded type sensors are not sealed to allow for movement of the detector unit, and are typically
installed together with a thermowell appropriate to the use environment. When installing the
temperature sensor directly, contact between the process fluid and temperature sensor should be
avoided, or a sealed type sensor should be used instead.
4.2 Head
Warning: Certified explosion proof cable glands must be used when installing in hazardous areas. See
the <Table: Head information> below for the types of cables that may be connected.
Table : Head information
Head
Head material
Head thread
(Cable entry size)
Conduit adaptor
Conduit adaptor
material
Explosion proof
(Single/Dual entry
type)
ALDC12.1
(Single entry)
PF 1/2, PF 3/4,
NPT 1/2, NPT 3/4
NPT 1/2, NPT 3/4
M20x1.5P
PT (unavailable)
Brass+Ni.plating
316SS
316SS
PF 1/2
AC4C
(Dual entry)
PF 1/2
Explosion proof
(Single entry)
Explosion proof
(Double entry)

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4.3 Detector unit and process connection unit material
Metal
Material
Usage
temperature
(℃)
Max.
temperature
(℃)
Characteristic
304SS
900
1000
Typically used in thermowells to protect against heat and
corrosion. Direct use in sulfurous environments or
reducing flame is not recommended.
316SS
900
1000
Contains Mo for outstanding heat, acid and alkaline
resistance.
316L SS
950
1050
Less carbon content than 316.
Better acid and alkaline resistance than 316SS.
321SS
900
1000
Weak sulfur and reducing heat resistance. Outstanding
corrosion and heat resistance
310SS
950
1050
High Ni and Cr content, with optimal high-temperature
strength with high heat and oxidation resistance.
347SS
900
1000
Contains Nb-Ta for better corrosion resistance than
304SS. Outstanding resistance to fine surface corrosion.
446SS
1050
1125
High Cr steel with outstanding resistance to oxidizing and
reducing atmospheres containing sulfur. Suitable for salt
baths, castings and other high-temperature
environments.
Inconel600
1180
1250
High Cr and Ni steel with outstanding resistance to
oxidizing and reducing atmospheres at high temperature.
Cannot be used in sulfurous atmospheres.
4.4 Process connection unit
4.4.1 Sheathed cable (MI cable) type

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4.5 Relationship between process connection unit length and head temperature
increase
1) T: Operating temperature)
2) Process extension length: Distance between thermowell or process line to
* The process extension length of units installed in explosion proof areas must be sufficient to keep the
temperature increase at less than 20°C
※Caution: When installing a temperature sensor unit to satisfy the surface temperature condition (T6:
85℃), please proceed according to the figure below

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5. Installation guide
5.1 Pre-installation checks and precautions
1) Beware of disconnection of the lead wire during storage and transport.
2) Check for disconnection using a tester prior to installation of the product.
3) Use a Megger (Megohmmeter) to measure and confirm that insulation resistance is within normal
range prior to installation of the product.
4) When transporting the sensor assembly to the tank and attaching to the nozzle, avoid applying
external physical force (compression, impact, etc.) on the sheathed cable (MI cable).
5) Check that the protection cover and thermocouple are free of scratches, cut marks, oil or other
contaminants.
(Even tiny amounts of foreign matter can decrease the accuracy of measurements.)
5.2 Installation requirement
1) Do not pull on or push the sheathed cable (MI cable) when installing or disassembling the product.
2) For products attached to comp’ fittings do not loosen screws during operation. Attach the comp’
fittings to the temperature sensor prior to installation.
3) For products attached to comp’ fittings, be careful not to pull or turn the sheathed cable (MI cable)
when attaching or detaching components with the product in an assembled state. (Can be the
cause of leaks)
4) When installing a temperature sensor in an existing thermowell, inspect the inside of the
thermowell for obstructions before inserting the temperature sensor to prevent damage to the
temperature sensor or sparks due to friction during installation.
5) When installing in direct contact with the process, check that the external loads applied to not
cause deformation of the instrumentation and welded parts