WIKA PEW-1 Series User manual

Operating instructions
Betriebsanleitung
Mode d'emploi
Manual de instrucciones
EN
DE
FR
ES
Pressure sensor with wireless transmission, models PEW-1000 and PEW-1200
Pressure sensor with wireless transmission, model PEW-1x
Drucksensor mit Funkübertragung, Typ PEW-1x
Capteur de pression avec transmission sans l, type PEW-1x
Sensor de presión con transmisión wireless, model PEW-1x

2WIKA operating instructions, models PEW-1000 and PEW-1200
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© 09/2022 WIKA Alexander Wiegand SE & Co. KG
All rights reserved.
WIKA®is a registered trademark in various countries.
Contents
1. General information 4
2. Design and function 5
3. Safety 7
4. Commissioning, operation 14
5. Faults 22
6. Maintenance and cleaning 25
7. Dismounting, return and disposal 27
8. Specications 29
Annex 1: EU declaration of conformity 62
Contents

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1. General information
1. General information
■
The pressure sensor 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 certied to 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.
■
Skilled personnel must have carefully read and understood the operating instructions prior to beginning any work.
■
The general terms and conditions contained in the sales documentation shall apply.
■
In case of a dierent interpretation of the translated and the English operation instruction, the English wording shall
prevail.
■
Subject to technical modications.
■
Further information:
- Internet address: www.wika.de / www.wika.com
- Relevant data sheet: PE 87.23
- Additional documentation:
■
Special documentation for BLE communication specications, models
PEW-1000 and PEW-1200, 14536045
■
Special documentation for LoRaWAN® communication specications,
model PEW-1000, 14536043
- Contact: Tel.: [phone]
[email protected]
- Tapped holes for process connections: Technical information IN 00.14
- Electrical mounting: Technical information IN 00.50
Bluetooth® is a registered trademark of Bluetooth SIG, Inc.
LoRaWAN®and LoRa Alliance®are trademarks which are used under the LoRa Alliance®licence.

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2. Design and function
2. Design and function
2.1 Overview






2.2 Description
Wherever the process pressure has to be transmitted electronically but a cable connection of the pressure sensor is
out of the question, the IIoT-capable measuring instrument model PEW-1xxx nds its application.
The fully welded sensor element absorbs the pressure and thus experiences a change in resistance of the measuring
bridge as a measure of the applied pressure.The measuring electronics convert the change in resistance into an
electronic signal, which is transmitted to a receiver via the radio module.
On the electronics, the temperature value in the instrument is registered and made available in the radio protocol.
The battery-operated radio 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 model PEW-1xxx meets all safety requirements of relevant standards and regulations for measuring the operating
pressure of pressure vessels as well as the requirements of the radio equipment directive for data communication.
Case (removable)
Battery with JST connector
Radio PCB with JST female connector
Case with product label
Process connection, spanner ats
Process connection, thread

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The transmission of the measured pressure values to an IIoT platform is carried out at a preset sending interval.The
measurement and sending intervals, and also the alarm limits, for particular measured values can be congured over
the IIoT platform.
Using a mobile device with a local interface via Bluetooth® Low Energy, the instrument status (current measured value,
battery life, etc.) can also be queried on-site and the instrument can also be congured.
An update of the measured value only occurs in line with the set measuring rate! Until the next
measurement, the sensor transmits the last valid measured value.
2.3 Functional principle (model PEW-1000)
The model PEW-1000 uses the LoRaWAN® class A radio standard, which is designed for energy-saving operation.
The last registered measured value is, optionally, transmitted via Bluetooth®in “periodic advertising mode” at
an advertising interval of 1.25 s. The measuring rate can be dened independently of the transmission rate. The
model PEW-1200 can be congured such that, on triggering of an alarm, the measuring rate is changed, 4.5 “Alarm
description”.
→ For details on the Bluetooth® connection, see chapter 3.8.2 “Bluetooth®Low Energy” and the additional
documentation “Special documentation for BLE communication specications, models PEW-1000 and PEW-1200”.
→ For details on the LoRaWAN®, see: https://lora-alliance.org
→ For details on the LoRaWAN® communication protocol, see “Special documentation for LoRaWAN®communication
specications, model PEW-1000”
Examples for uplink contents:
■
Measured values
■
Notications for fault diagnosis
■
Alarm parameters
■
Conguration ID (for the identication of changes in the measuring and sending rate)
■
Battery charge status in V
Example for downlink contents:
Conguration change (e.g. measuring rate, sending rate, alarm parameter etc.), which can be recognised by the system.
2. Design and function

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2.4 Functional principle (model PEW-1200)
The model PEW-1200 uses the Bluetooth®radio standard which is designed for energy-saving operation.
The measuring rate can be dened independently of the transmission rate. The model PEW-1200 can be congured
such that, on triggering of an alarm, the measuring rate is changed, see chapter 4.5 “Alarm description”.
2.5 Scope of delivery
LoRaWAN®version
■
Pressure sensor with radio transmission, model PEW-1000
■
Operating instructions
■
Quick start guide with LoRaWAN® Bluetooth® login credentials for commissioning
■
Battery (in the instrument)
■
Test report (optional)
■
Sealing (optional)
Bluetooth®version
■
Pressure sensor with radio transmission, model PEW-1200
■
Operating instructions
■
Quick start guide with Bluetooth® login credentials for commissioning
■
Battery (in the instrument)
■
Test report (optional)
■
Sealing (optional)
Cross-check scope of delivery with delivery note.
3. Safety
3.1 Explanation of symbols
WARNING!
... indicates a potentially dangerous situation that can result in serious injury or death, if not avoided.
2. Design and function / 3. Safety

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CAUTION!
... indicates a potentially dangerous situation that can result in light injuries or damage to property or the
environment, 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 ecient and trouble-free operation.
3.2 Intended use
The pressure sensor is used for wireless transmission of a pressure and temperature value.
This instrument is not permitted to be used in hazardous areas!
The models PEW-1000 and PEW-1200 have been developed for use in non-hazardous media, i.e. for media of uid
group 2 in accordance with directive 2014/68/EU article 13. The use with hazardous media (uid group 1 in accordance
with 2014/68/EU article 13) is not allowed.
The remote monitoring of the process pressure via radio transmission is only suitable for non-critical and non-safety-
relevant applications.
The LoRaWAN®signal may only be used for mobile applications to a limited extent.This applies particularly
to high spreading factors.
The instrument has been designed and built solely for the intended use described here, and may only be used
accordingly.
The technical specications contained in these operating instructions must be observed. Improper handling or
operation of the instrument outside of its technical specications requires the instrument to be taken out of service
immediately and inspected by an authorised WIKA service engineer.
The manufacturer shall not be liable for claims of any type based on operation contrary to the intended use.
3. Safety

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3.3 Improper use
Any use beyond or dierent to the intended use is considered as improper use. Unauthorised modications to the
instrument are not permissible.
Use in the following apllications areas counts as improper use:
■
Safety or emergency shutdown devices
■
Hazardous areas
■
Abrasive or viscous media and applications with hydrogen and oxygen
■
Rail vehicles, medical devices, refrigeration technology and water pumps
■
Places of use that are not protected from weather inuences
■
Processes with high condensation
3.4 Personnel qualication
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-specic
regulations, current standards and directives, are capable of carrying out the work described and independently
recognising potential hazards.
3. Safety

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3.5 Labelling, safety marks
Product label (example)
Measuring range
MAC address
DevEUI (not with Bluetooth® sensor, model PEW-1200)
Battery information
QR code per LoRa Alliance® specication
Approvals
Date of manufacture
Regional parameter WAN (not with Bluetooth® sensor model PEW-1200)
Serial number
Article number
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
PEW-1000
Made in GermanyDE-63911 KlingenbergWARNING USE ONLY LISTED BATTERIES
 





3. Safety

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3.6 Contents of the QR code (example)
LW:D0:70B3D597B0000002:70B3D597B0004D71:02A30002:S1A01FZFCOJ6:PD1883F69EBE3:CC9B3
Contents Identier Example Comment
SchemaID -D0 -
JoinEUI (64 bit) -70B3D597B0000002 JoinEUI = AppEUI
DevEUI (64 bit) -70B3D597B0004D71 -
ProleID - 02A30002 02A3 = VendorID WIKA; 0002 last 4 digits of the JoinEUI
SerNum S1A01FZFCOJ6 Alphanumeric WIKA serial number (11-digit)
Proprietary PD1883F69EBE3 Bluetooth® MAX address: D1:88:3F:69:EB:E3
CheckSum C C9B3 -
3. Safety

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3.7 Approved battery
To ensure proper operation and the best possible performance, use only the batteries listed below:
Sensor type Designation
Model PEW-1000
(LoRaWAN®and
Bluetooth®)
Lithium thionyl chloride battery (model Tadiran SL860/S) and hybrid layer capacitor (model Tadiran
HLC1020L) as an assembly with connection cable assembled
Model PEW-1200
(Bluetooth®)
Lithium thionyl chloride battery and hybrid layer capacitor (model Tadiran HLC1020L) as an
assembly with connection cable assembled.
■
Model Tadiran SL861/S
■
Model Tadiran SL860/S
Attention: The current battery may only be used with the appropriate enclosure type, see dimensions
in chapter 8 “Specications”.
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 re 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 continue to use batteries that have been dropped on the ground.
3. Safety

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3.8 Data transfer security
3.8.1 LoRaWAN®
LoRaWAN®security uses the cryptographic principle of AES cryptography in combination with several operating
modes: 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 identier (EUI-64-based DevEUI), both used during the device
authentication process.
→ Further details can be found in the ocial LoRaWAN®Security White Paper from the LoRa Alliance®, see
https://lora-alliance.org
3.8.2 Bluetooth®Low Energy
Bluetooth® Low Energy communicates in the licence-free 2.4 GHz ISM band and is a globally harmonised energy-
ecient 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 sensors of the model PEW-1xxx transmit the pressure and temperature 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 conguration 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 for each instrument is
random.The initial pairing key can be found on the enclosed quick start guide.
If the security code is entered incorrectly 5 times, the instrument is blocked for connection with this code.
After disconnecting the voltage supply or 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.
3. Safety

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4. Commissioning, operation
WARNING!
Physical injury and/or damage to property due to the selection of the wrong instrument version
▶
Before mounting, commissioning and operation, make sure that the correct pressure sensor has been
selected with regard to measuring range, design and specific measuring conditions.
WARNING!
Physical injuries and damage to property and the environment caused by hazardous media
Upon contact with hazardous media (e.g. oxygen, acetylene, ammable 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, aggressive media with extremely high temperature and 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.
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.
4.1 Installing the instrument
4.1.1 Connect battery
In the delivery state, the battery is not connected to the electronics.
Connecting the battery also, see chapter 2.1 “Overview”:
1. Remove case (bayonet lock)
2. Plug in the battery connector and snap it into place.
⇒ LED lights up.
4. Commissioning, operation

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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.
For the rst 25 minutes after connecting the battery, 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 transfer not successful (conrmed message)
Green Blinks twice LoRaWAN® data transfer successful (conrmed message)
WARNING!
Danger for electronic components through electrostatic discharge (ESD)
Improper handling of electrical components can destroy or damage them.
▶
When the sensor housing is open, e.g. when connecting or changing the battery pack, sufficient ESD
protection must be ensured.
▶
Do not touch the PCB and electrical components.
▶
Before removing the plastic case, touch the grounded metal part of the case, or an alternative adjacent
grounded metal object (e.g. radiator or pipes), in order to discharge any static from the body.
▶
Avoid contact between the electronics and clothing.
Notes on the sending characteristic
■
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 aected by concrete walls, metal shield, 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 gure:
4. Commissioning, operation

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Information on the installation of the receiving gateway
Position the gateway in such a way that the transmission power of model PEW-1000 is optimally utilized. 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 sucient
radio connection can be established from the outside to several oors.
■
In outdoor areas, ensure that the gateway is mounted at a sucient height and is not covered by anything in the
immediate vicinity. The higher the gateway is positioned, the further the LoRaWAN®connection reaches.
180
0
30
60
90
120
150
210
240
270
300
330
40 dB30 dB20 dB10 dB
Z
X
Y
Horizontal polarisation, x-z plane
Vertical polarisation, x-y plane
4. Commissioning, operation

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4.2 App “myWIKA wireless device”
Via the “myWIKA wireless device” app and a Bluetooth® Low Energy connection, the functionality of the
LoRaWAN® communication can be activated and deactivated through the mobile device. Furthermore, the
instrument data and the current measured value can be read via the app. For this, follow the instructions on
the screen.
For iOS-based mobile phones (from iOS version 13), the
app is available in the Apple Store under the link below.
For mobile phones with an Android operating system,
the app is available in the Play Store under the link
below.
Download here Download here
4.3 Battery status
The battery life is displayed as a percentage value over Bluetooth®in the advertising frame and transmitted in the form
of the battery voltage (nominal value: 3.6 V) via LoRaWAN®. Since the battery life is inuenced by many factors, such
as the measurement and sending rate, the spread factor, and the ambient and process temperatures, this value is
only an approximation.The calculation of the approximate value is based on a constant ambient temperature of 20 °C
[68 °F] is assumed.
At values below 20 % of the expected remaining service life or below a residual voltage of 2.7 V a battery change is
recommended. If the battery is completely discharged, no more values are transmitted via the radio interface.
The battery voltage (nominal value: 3.6 V) can also be read out via the “myWIKA wirelss device” app and the
Bluetooth®interface.
4. Commissioning, operation

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4.4 Connection of the model PEW-1000 to an LPWAN
The model PEW-1000 can be connected via LoRaWAN®to an IIoT infrastructure.
For this, the model PEW-1000 is connected to a LoRaWAN®gateway and the measured values are transferred to the
IIoT infrastructure (e.g. platform, PC, mobile device, etc.) at freely congurable intervals.
For the IIoT connection, all relevant data for registration and commissioning, as well as an interface specication for
further processing of the data are provided (see the additional documentation “Special documentation for LoRaWAN®
communication specications, model PEW-1000” on the WIKA website).
The deployment package includes the following registration information:
■
DevEUI (64-bit end device, unique identier)
■
AppEUI (64-bit unique, application identier)
■
AppKey (128-bit key)
■
Interface specication (see the additional documentation “Special documentation for LoRaWAN®communication
specications, model PEW-1000” on the WIKA website)
With a customer-specic integration, the payload integration must be carried out by the customer in accordance
with the additional documentation “Special documentation for LoRaWAN® communication specications,
model PEW-1000” on the WIKA website.
4.5 Alarm description
Three basic alarm types can be congured: Alarm limit, alarm limit with delay, pressure change.
These alarms can be set using the „myWIKA wireless device“ app via Bluetooth®or using a LoRaWAN®connection
via the WIKA cloud.
For a customers own connection without a WIKA app or WIKA cloud, the „Special documentation for LoRaWAN®
communication specications, model PEW-1000“ or „Special documentation for Bluetooth®communication
specications, model PEW-1200“ must be observed.
A combination of alarm functions is possible, e.g. alarm limit for rising and falling pressure to dene an operating
window for the application.
4. Commissioning, operation

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4.5.1 Alarm limit, rising pressure
4.5.2 Alarm limit, falling pressure
Sensor measured value
Dead band
Alarm limit
Dead band
Alarm triggered Alarm switched o Alarm triggered Alarm switched o
Time
Measuring interval
Sensor measured value
Dead band
Alarm limit
Dead band
Measuring interval
Alarm triggered Alarm triggered
Alarm switched o Alarm switched o
Time
4. Commissioning, operation

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4. Commissioning, operation
4.5.3 Alarm limit, rising pressure with delay
4.5.4 Alarm limit, falling pressure with delay
Sensor measured value
Dead band
Alarm limit
Dead band
Alarm triggered Alarm switched o
Measuring interval
Time
Delay
Sensor measured value
Dead band
Alarm limit
Dead band
Alarm triggered Alarm switched o
Measuring interval
Time
Delay

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4.5.5 Pressure change (slope), rising
Calculates the pressure change in % / minute
(P1 - P0) / t
P0 = Initial pressure
P1 = Pressure recorded by Measuring interval t
t= Adjusted Measuring in minutes
Example: Pressure rises from 3 to 5 bar based on a measuring interval of 5 minutes: → (5 - 3) / 5 = 0,4 bar / minute
Sensor measured
value
Alarm triggered Alarm switched o
Measuring interval
Time
Calculated
pressure change
Alarm limit
4. Commissioning, operation