WIKA TRW User manual

Operating instructions
Betriebsanleitung
EN
DE
Miniature resistance thermometer with wireless transmission,
model TRW
Miniature resistance thermometer with wireless transmission,
model TRW
Miniatur-Widerstandsthermometer mit Funkübertragung,
Typ TRW

2
14642235.01 11/2023 EN/DE
WIKA operating instructions miniature resistance thermometer, model TRW
EN
DE
Operating instructions model TRW Page 3 - 44
Betriebsanleitung Typ TRW Seite 45 - 85
© 11/2023 WIKA Alexander Wiegand SE & Co. KG
All rights reserved. / Alle Rechte vorbehalten.
WIKA®is a registered trademark in various countries.
WIKA®ist eine geschützte Marke in verschiedenen Ländern.
LoRaWAN®ist eine Marke, die unter Lizenz der LoRa-Alliance® verwendet wird.
Die Bluetooth®-Wortmarke und -Logos sind eingetragene Marken im Besitz von Bluetooth SIG, Inc. und
jede Verwendung dieser Marken durch WIKA erfolgt unter Lizenz. Andere Marken und Markennamen sind
Eigentum der jeweiligen Inhaber.
Prior to starting any work, read the operating instructions!
Keep for later use!
Vor Beginn aller Arbeiten Betriebsanleitung lesen!
Zum späteren Gebrauch aufbewahren!

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3WIKA operating instructions miniature resistance thermometer, model TRW
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Content
1. General information 5
1.1 Abbreviations, definitions . . . . . . . . . . . . . . . . . .6
1.2 Explanation of symbols . . . . . . . . . . . . . . . . . . .6
2. Safety 7
2.1 Intended use . . . . . . . . . . . . . . . . . . . . . .7
2.2 Improper use . . . . . . . . . . . . . . . . . . . . . .7
2.3 Responsibility of the operator . . . . . . . . . . . . . . . . .8
2.4 Personnel qualification . . . . . . . . . . . . . . . . . . .9
2.5 Labelling, safety markings . . . . . . . . . . . . . . . . . .9
2.6 Contents of the QR code on the product label (example) . . . . . . 10
2.7 Approved batteries . . . . . . . . . . . . . . . . . . . 11
2.8 Safety description for power supply . . . . . . . . . . . . . . 11
2.9 Data transmission security . . . . . . . . . . . . . . . . . 12
3. Transport, packaging and storage 13
3.1 Transport. . . . . . . . . . . . . . . . . . . . . . . 13
3.2 Packaging and storage . . . . . . . . . . . . . . . . . . 14
4. Design and function 15
4.1 Overview. . . . . . . . . . . . . . . . . . . . . . . 15
4.2 Description . . . . . . . . . . . . . . . . . . . . . . 15
4.3 Functional principle . . . . . . . . . . . . . . . . . . . 16
4.4 Scope of delivery . . . . . . . . . . . . . . . . . . . . 16
5. Commissioning and operation 17
5.1 First configuration. . . . . . . . . . . . . . . . . . . . 19
5.2 Establishing the power supply . . . . . . . . . . . . . . . 20
5.3 Connecting the radio unit to a measuring instrument . . . . . . . . 20
5.4 “myWIKA wireless device” app . . . . . . . . . . . . . . . 22
5.5 Battery status . . . . . . . . . . . . . . . . . . . . . 22
5.6 Connecting the radio unit within an LPWAN . . . . . . . . . . . 22
5.7 Alarm description . . . . . . . . . . . . . . . . . . . . 23
6. Faults 26
7. Maintenance, cleaning and calibration 28
7.1 Maintenance . . . . . . . . . . . . . . . . . . . . . 28
7.2 Battery handling . . . . . . . . . . . . . . . . . . . . 28
Content

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8. Dismounting, return and disposal 30
8.1 Dismounting . . . . . . . . . . . . . . . . . . . . . 30
8.2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . 30
8.3 Return. . . . . . . . . . . . . . . . . . . . . . . . 31
8.4 Disposal . . . . . . . . . . . . . . . . . . . . . . . 32
9. Specifications 33
10. Accessories and spare parts 43
Content

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1. General information
1. General information
■The instrument described in the operating instructions has been designed and
manufactured using state-of-the-art technology. All components are subject to
stringent quality and environmental criteria during production. Our management
systems are certified in accordance with ISO 9001 and ISO 14001.
■These operating instructions contain important information on handling the
instrument. Working safely requires that all safety instructions and work instructions
are observed.
■Observe the relevant local accident prevention regulations and general safety
regulations for the instrument's range of use.
■The operating instructions are part of the product and must be kept in the immediate
vicinity of the instrument and readily accessible to skilled personnel at any time. Pass
the operating instructions on to the next operator or owner of the instrument.
■Skilled personnel must have carefully read and understood the operating instructions
prior to beginning any work.
■In case of a different interpretation of the translated and the English operating
instructions, the English wording shall prevail.
■The general terms and conditions contained in the sales documentation shall apply.
■Subject to technical modifications.
■Further information:
- Internet address: www.wika.de / www.wika.com
- Relevant data sheet: TE 63.04
- Additional documentation
Special documentation for LoRaWAN®
communication protocol, model TRW,
14617652
- Contact: Tel.: [phone]

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1. General information
1.1 Abbreviations, definitions
■Bullet
▶Instruction
1. ... x. Follow the instruction step by step
⇒Result of an instruction
→See ... cross-references
RTD Resistance thermometer
PBT Polybutylene terephthalate
1.2 Explanation of symbols
DANGER!
... indicates a directly dangerous situation resulting in serious injury or
death, if not avoided.
WARNING!
... indicates a potentially dangerous situation that can result in serious
injury or death, if not avoided.
CAUTION!
... indicates a potentially dangerous situation that can result in light
injuries or damage to property or the environment, if not avoided.
DANGER!
... identifies hazards caused by electrical power. Should the safety
instructions not be observed, there is a risk of serious or fatal injury.
DANGER!
... indicates a potentially dangerous situation in the hazardous area that
can result in serious injury or death, if not avoided.
WARNING!
... indicates a potentially dangerous situation that can result in burns,
caused by hot surfaces or liquids, if not avoided.
Information
... points out useful tips, recommendations and information for efficient
and trouble-free operation.

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2. Safety
2. Safety
2.1 Intended use
The resistance thermometer TRW transmits its temperature value to a higher-level
system. The instrument can be used wherever an RTD value is digitalised and made
available via Bluetooth® Low Energy or LoRaWAN®. Remote monitoring of the RTD
value can be made through a web-based platform.
The instrument has been designed and built solely for the intended use described here,
and may only be used accordingly.
The technical specifications contained in these operating instructions must be
observed, see chapter 9 “Specifications”. It is assumed that the instrument is handled
properly and within its technical specifications. Otherwise, the instrument must be taken
out of service immediately and inspected by an authorised WIKA service engineer.
Handle electronic instruments with the required care (protect from humidity, impacts,
strong magnetic fields, static electricity and extreme temperatures, do not insert any
objects into the instrument or its openings).
The manufacturer shall not be liable for claims of any type based on operation contrary
to the intended use.
2.2 Improper use
WARNING!
Danger due to emerging fire or explosion
The use of non-approved batteries can lead to personal injury, damage to
the instrument and the environment due to fire.
▶Only use approved batteries, see chapter 9 “Specifications”.
The remote monitoring function must not be used for control purposes, as it
cannot be guaranteed that data packets won't be lost during wireless trans-
mission.
The LoRaWAN®signal may only be used for mobile applications to a limited
extend.This applies particularly to high spreading factors.
■This instrument is not permitted to be used in hazardous areas.
■For applications with direct contact with foodstuffs this instrument is not suitable.
■Any use beyond or different to the intended use is considered as improper use.
■Refrain from unauthorised modifications to the instrument.
■Do not use this instrument in safety or emergency shutdown devices.

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2. Safety
2.3 Personnel qualification
The activities described in these operating instructions may only be
carried out by skilled personnel who have the qualifications described
below.
Skilled personnel
Skilled personnel, authorised by the operator, are understood to be personnel
who, based on their technical training, knowledge of measurement and control
technology and on their experience and knowledge of country-specific regulations,
current standards and directives, are capable of carrying out the work described and
independently recognising potential hazards.
2.4 Labelling, safety markings
The labelling, safety markings must be maintained in a legible condition.
Product label (example)
1Typ
2 Funkstandards (für LoRaWAN®mit Angabe des „Regional Parameter WAN“)
3 Radio frequency
4Ambient temperature
5MAC-Addresse
6DevEUI (nicht bei Bluetooth®)
7QR-Code nach LoRa Alliance®-Spezifikation
8Bluetooth®
9Versorgungsspannung
10 Serial number
11 Article number
TRW-ZZ
P# 123456789
i# 12345678ABC
-50°C....500°C
EU868 MHz
MAC Address: XX:XX:XX:XX:XX:XX
DevEUI: XXXX-XXXX-XXXX-XXXX
Battery XX X XX XX XXX
WARNING USE ONLY LISTED BATTERIES 63911 Klingenberg/Germany 2023-06
11
1 2 3 4 5 6 8
9
10
7

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2. Safety
Symbols
Before mounting and commissioning the instrument, ensure you read the
operating instructions!
Do not dispose of with household waste. Ensure a proper disposal in
accordance with national regulations.
DC voltage
2.5 Contents of the QR code on the product label (example)
LW:D0:70B3D597B0000002:70B3D597B0004D71:02A30002:S1A01FZFCOJ6:PD-
1883F69EBE3:CC9B3
Contents Identifier Example Comment
SchemaID - D0 -
JoinEUI (64-bit) - 70B3D597B0000002 JoinEUI = AppEUI
DevEUI (64-bit) - 70B3D597B0004D71 -
ProfileID - 02A30002 02A3 = VendorID WIKA; 0002 last 4
digits of the JoinEUI
SerNum S 1A01FZFCOJ6 Alphanumeric WIKA serial number
(11-digit)
Proprietary P D1883F69EBE3 Bluetooth®MAC address:
D1:88:3F:69:EB:E3
CheckSum C C9B3 -

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2. Safety
2.6 Approved batteries
CAUTION!
Physical injuries and damage to property and the environment
Lithium thionyl chloride batteries are not rechargeable. Improper handling
can lead to leakage or escape of vapourised electrolyte vapours and cause
a fire or explosion.
▶Do not open the battery.
▶Do not damage the battery cells.
▶The positive and negative connections must not be short-circuited with
conductors.
▶Do not reverse the polarity.
▶Do not expose the battery to excessive mechanical loads.
▶Do not expose the battery to water or condensation.
▶Do not heat, solder or expose the battery to fire.
▶Do not use any rechargeable batteries.
▶Do not use damaged batteries.
To ensure proper operation and the best possible performance, use only the battery
listed, see chapter 10 “Accessories and spare parts”.
Battery
Battery pack Lithium thionyl chloride battery and hybrid layer capacitor (model Tadiran
HLC1020L) as an assembly with connection cable assembled.
Model Tadiran SL860/S
With battery version, use only the suitable case, see chapter 5.3 “Establishing the power
supply” and 9 “Specifications”.
2.7 Safety description for power supply
Temperature range -20 ... +60 °C [-4 ... +140 °F]
Voltage supply battery 3.6 V
Current supply Max. 250 mA
Max. altitude 2,000 m [6561.68 ft]

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2. Safety
2.8 Data transmission security
LoRaWAN®
LoRaWAN®transmission uses the cryptographic principle of AES encryption in
combination with several operating modes: for a secure data transmission, CMAC2 for
integrity protection and CTR3 for encryption. Each LoRaWAN®device is personalised
with a unique 128-bit AES key (AppKey) and a globally unique identifier (EUI-64-based
DevEUI), both used during the device authentication process.
→Further details can be found in the official LoRaWAN®Security White Paper from the
LoRa Alliance®, see https://lora-alliance.org
Bluetooth®Low Energy
Bluetooth®Low Energy communicates in the licence-free 2.4 GHz ISM band and is a
globally harmonised energy-efficient radio standard. Bluetooth®Low Energy uses 40
channels between 2.402 GHz and 2.480 GHz. Encryption is performed using the AES
128 encryption algorithm in combination with distributed key replacement.
The radio unit transmits the measured value as an optional broadcast message on the
advertising channels 37, 38 and 39, in addition to the instrument name and the battery
charge status. Further information and detailed configuration and command options are
available via a point-to-point connection.
Pairing is established using a passkey entry method and requires the entry
of a security code. Instrument settings can only be accessed after pairing
has been completed.The pairing key is set individually for each instrument
and is made available to the customer with the quick start guide. For
individual applications, the pairing key can be configured by the user via the
app.
If the security code is entered incorrectly 5 times, the instrument is blocked
for connection with this code. After removing the battery, 5 attempts are
once again available. If this is not possible for technical reasons, e.g.
because the sensor cannot be reached to open the case, contact technical
support.

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3. Transport, packaging and storage
3. Transport, packaging and storage
3.1 Transport
WARNING!
Damage from batteries and rechargeable batteries through
improper transport
If loose or removed batteries are transported incorrectly, they can
explode, burn or leak.
▶Tape exposed contacts and pack the rechargeable batteries so that
they do not move in the packaging (prevent short-circuit).
▶Be careful when transporting and pay attention to the symbols on the
packaging.
CAUTION!
Damage through improper transport
With improper transport, damage to property can occur.
▶When unloading packed goods upon delivery as well as during
internal transport, proceed carefully and observe the symbols on the
packaging.
▶With internal transport, observe the instructions in chapter
3.2 “Packaging and storage”.
Check the instrument for any damage that may have been caused.
In the event of any damage, do not commission the instrument and contact the
manufacturer immediately.
If the instrument is transported from a cold into a warm environment, the formation of
condensation may result in instrument malfunction. Prior to recommissioning, wait for
the instrument temperature and the room temperature to equalise.
Strictly observe the following when shipping the instrument:
All instruments delivered to WIKA must be free from any kind of hazardous substances
(acids, bases, solutions, etc.) and must therefore be cleaned before being returned.
Remove the batteries before returning.
The lithium-ion rechargeable batteries or lithium-metal batteries included are subject
to the requirements of the dangerous goods law. Special requirements for packaging
and marking must be observed when shipping. A dangerous goods expert must
be consulted when preparing the package. Do not send any damaged or defective
rechargeable batteries. Mask open contacts and pack the rechargeable battery so that
it does not move in the packaging and also prevents short-circuits. Observe the different
dangerous goods requirements relative to the respective modes of transport and any
other national regulations.

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3. Transport, packaging and storage
3.2 Packaging and storage
Do not remove packaging until just before mounting.
Keep the packaging as it will provide optimum protection during transport (e.g. change
in place of use, sending for repair).
Permissible conditions at the place of storage:
■Storage temperature: -40 ... +70 °C [-32 ... +158 °F]
■Humidity: 35 ... 85 % relative humidity (non-condensing)
Avoid exposure to the following factors:
■Direct sunlight or proximity to hot objects
■Mechanical vibration, mechanical shock (putting it down hard)
■Soot, vapour, dust and corrosive gases
■Hazardous environments, flammable atmospheres
Store the instrument in its original packaging in a location that fulfils the previously listed
conditions. Instruments that have already been commissioned must be cleaned before
storage, see 7.3 „Reinigung“.
If the original packaging is not available, pack and store the instrument as described
below:
1. Disconnect the battery.
2. Wrap the instrument in an anti-static plastic film.
3. Place the instrument, along with the shock-absorbent material, in the packaging.
4. If stored for a prolonged period of time (more than 30 days), place a bag containing a
desiccant inside the packaging.

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4. Design and function
4.1 Overview
Upper case part (removable)
Battery compartment, Connector of the power supply
Case with product label
Process connection
Thermowell/protection tube
4.2 Description
The radio unit was developed in order to transmit sensor signals wirelessly. The
instrument is connected to a sensor and takes readings from it.These values are made
available in the respective radio protocol.
The wireless transmission is achieved via LoRaWAN®based on LPWAN technology
(low-power wide-area network) to enable large transmission ranges and long battery
life, or via Bluetooth®Low Energy.
The instrument is powered by a battery.
The radio unit meets all safety requirements of relevant standards and regulations of
the Radio Equipment Directive for data communication.The radio unit is a product that
meets high requirements and transmits data with excellent reliability.
The transmission of the sensor signal to the IIoT platform is carried out at a preset
sending interval.The sending intervals, and also the alarm limits, can be configured over
the IIoT platform. In addition, the instrument status (current measured value, battery life,
etc.) can also be queried and set on-site via a mobile device using a local interface via
Bluetooth®Low Energy.





4. Design and function

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4.3 Functional principle
The radio unit uses the Bluetooth®Low Energy 4.2 radio standard which is designed for
energy-saving operation. In connected mode, the radio unit can be configured on-site
using a mobile device with the “myWIKA wireless device” app.
The last measured value recorded is transmitted via Bluetooth®Low Energy in
“Advertising Mode” with an interval of 1.25 s.The measured value data can optionally be
removed from the advertising.
→For details on the Bluetooth®connection, see chapter
2.8 “Data transmission security” and the additional documentation “Special
documentation for BLE communication specifications, model TRW”
Typical applications
■Signal recording
■Setting the alarm parameters
■Fault diagnosis
■Configuration ID (for the identification of changes in the sending rate)
■Configuration change (e.g. sending rate, alarm parameter etc.)
The analogue signal or RTD signal to be measured can only be set via
Bluetooth®.
4.4 Scope of delivery
■Instrument model TRW
■Operating instructions
■Quick start guide with login credentials for commissioning (red envelope)
■Battery in the instrument
Cross-check scope of delivery with delivery note.
4. Design and function

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5. Commissioning and operation
Personnel: Skilled personnel
WARNING!
Physical injury
When commissioning, there is a danger from aggressive
media and high pressures
▶Observe the information in the material safety data sheet for the
corresponding medium.
▶Before connecting to a vessel, pipeline or system, depressurise them.
WARNING!
Physical injuries and damage to property and the environment
caused by hazardous media
Upon contact with hazardous media (e.g. oxygen, acetylene,
flammable or toxic substances), harmful media (e.g. corrosive, toxic,
carcinogenic, radioactive), and also with refrigeration plants and
compressors, there is a danger of physical
injuries and damage to property and the environment. Should a failure
occur, hazardous media with extreme temperatures (over 55 °C [131 °F])
may be present at the instrument.
▶For these media, in addition to all standard regulations, The
appropriate existing codes or regulations must also be followed.
▶Wear the requisite protective equipment.
WARNING!
Physical injuries and damage to property and the environment
caused by hazardous media
Upon contact with hazardous media (e.g. oxygen, acetylene,
flammable or toxic substances), harmful media (e.g. corrosive, toxic,
carcinogenic, radioactive), and also with refrigeration plants and
compressors, there is a danger of physical
injuries and damage to property and the environment. Should a failure
occur, hazardous media under high pressure or vacuum may be present
at the instrument.
▶For these media, in addition to all standard regulations, The
appropriate existing codes or regulations must also be followed.
▶Wear the requisite protective equipment.
5. Commissioning and operation

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5. Commissioning and operation
WARNING!
Physical injuries and damage to property and the environment
caused by media escaping under high pressure
With the pressurisation of the instrument, as a result of poor
sealing of the process connection, media under high pressure can
escape. Due to the high energy of the media that can
escape in the event of a failure, the possibility of physical
injuries and damage to property exists
▶The sealing of the process connection must be carried out expertly
and checked for leak tightness.
CAUTION!
Damage to property due to electrostatic discharge (ESD)
When working on open circuits (PCBs) there is a danger of damaging
sensitive electronic components through electrostatic discharge.
▶The correct use of grounded working surfaces and personal
armbands is required.
▶When the battery compartment is open, e.g. when changing the batte-
ry, sufficient ESD protection must be ensured.
▶Do not touch PCBs and electrical components.
▶Before removing the plastic cover, touch any part of the grounded
metal case or an adjacent grounded metal object (e.g. radiator,
pipelines) (static charges are dissipated from the body).
▶Avoid contact between the electronics and clothing.
Only use original parts, see chapter 10 “Accessories and spare parts”.
Check the instrument for any damage that may have been caused.
In the event of any damage, do not commission the instrument and contact the
manufacturer immediately.
Information
Avoid putting any mechanical loading on the electrical connections and on
the cases. Connections must only be opened once the instrument has been
depressurised and has cooled down.
Maximum permissible temperatures
■At the case: 70 °C [158 °F]
■At the process connection (version with FKM O-ring): -20 ... +125 °C [-4 ... +257 °F]

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5.1 Mechanical mounting
If the resistance thermometer is screwed directly into the process, the insertion length,
along with the flow rate and viscosity of the process media can reduce the maximum
probe load.
The case must be grounded against electromagnetic fields and electrostatic charge. It
is not necessary to connect the case separately to the equipotential bonding system,
provided that it has a fixed and secure contact to the metal vessel, its components or
pipes, and that these are connected to the equipotential bonding system.
In the event of non-metallic contact with the container or its structural parts or pipes, all
electrically conductive thermometer components protruding into the hazardous area
must be connected to an equipotential bonding system.
Tightening torques for compression fittings
Sealing Turns Max. pressure in bar [psi]
Stainless steel ferrule 1 ¼ ... 1 ½ 100 [1,450]
Stainless steel bite-type
ferrule
1 ¼ ... 1 ½ 100 [1,450]
PTFE ferrule 1 ¼ ... 1 ½ 8 [116]
5.2 First configuration
Check the radio unit for any damage that may have been caused. Obvious damage
must be reported immediately.
First commission the radio unit without any measuring instrument
connected.The configuration with the appropriate WIKA sensor must
be carried out in advance, in order to avoid damage to the measuring
instrument or the radio unit.
5. Commissioning and operation

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5.3 Establishing the power supply
The power supply is established via the internal battery.
Connect battery
In as-delivered condition, the battery is not connected to the electronics.
Connecting the battery, see chapter 7.2 “Battery handling”:
1. Open the case: As required by the version of the radio unit - a bayonet lock (plastic
version) or a screw-on lid (metal version) is fitted.To do this, grip the upper and lower
sides of the instrument with your hands and turn them as shown by the marking on
the cover.
2. Plug in the battery connector and snap it into place (⇒ LED lights up).
3. Put the case on and close it.To do this, grip the upper and lower sides of the
instrument with your hands and turn them in opposite directions as shown by the
marking on the cover.
5.4 Connecting the radio unit to a measuring instrument
For the first 25 minutes after connecting the power supply, the LED function is activated.
LED colour Mode Meaning
Blue Blinks once Internal communication between radio and sensor PCBs
Cyan ON for the
duration of the
join procedure
LoRaWAN®join procedure running
Cyan Blinks once LoRaWAN®join procedure successful
Red Blinks twice LoRaWAN®join procedure not successful
Red Blinks twice LoRaWAN®data transmission not successful (confirmed
message)
Green Blinks twice LoRaWAN®data transmission successful (confirmed
message)
Notes on the sending characteristics
■In order to achieve the best possible transmission quality, the radio link from the
terminal device to the receiving gateway should be as free of barriers as possible.
■The signal strength is from slightly to severely affected by concrete walls, metal
shielding, enclosures and hilly landscapes.
■For the best possible transmission performance of the antenna, no metal objects,
such as pipelines, may be closer than 10 cm to the antenna.
■With installation, pay attention to the sending characteristic of the instrument as well
as the information from the following figure:
5. Commissioning and operation

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Radiation characteristics
Information on the installation of the receiving gateway
Position the gateway in such a way that the transmission power of the instrument is
optimally utilised. For this, the following recommendations should be observed:
■Depending on the application, a gateway for indoor or outdoor use should be
selected.
■The radiation characteristics of the antenna should be taken into account when
positioning the gateway.
■If the sensors are located on one level, vertical mounting of the LoRaWAN®antenna
on the gateway is recommended. The location should ideally be in the middle of the
area to be covered.
■If the sensors are located on several levels, the gateway should be placed in the
middle of the building and the gateway antenna should be aligned horizontally.
■Another option is to place the gateway outside the building and align the antenna
vertically. In this way, a sufficient radio connection can be established from the
outside to several floors.
■In outdoor areas, ensure that the gateway is mounted at a sufficient height and is not
covered by anything in the immediate vicinity. The higher the gateway is positioned,
the further the LoRaWAN®connection reaches.
30
60
90
120
150
180
210
240
270
300
330
0
Z
Y
X
Horizontal polarisation, x-z plane
Vertical polarisation, x-y plane
-40 dB
-30 dB
-20 dB
-10 dB
5. Commissioning and operation