Sensata IWTRhT Series Industrial Wireless Temperature and Humidity Transmitter User Manual
- June 3, 2024
- Sensata
Table of Contents
Sensata IWTRhT Series Industrial Wireless Temperature and Humidity
Transmitter
Whilst every effort has been taken to ensure the accuracy of this document, we accept no responsibility for damage, injury, loss, or expense resulting from errors or omissions, and reserve the right of amendment without notice.
Information for users
This equipment has been tested and found to comply with the limits for a Class B device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy, and if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna
- Increase the separation between the equipment and receiver
- Connect the equipment into an outlet on a circuit different from that which the receiver is connected
- Consult the dealer or an experienced radio/TV technician for help
Caution: To satisfy FCC RF Exposure requirements for mobile and base
station transmission devices, a separation distance of 20cm or more should be
maintained between the antenna of this device and persons during operation. To
ensure compliance operation at closer than this distance is not recommended.
The antenna used for this transmitter must not be co-located or operating in
conjunction with any other antenna or transmitter. No other antenna may be
used with this equipment other than the PCB antenna supplied with this
equipment.
This document may not be reproduced in any way without the prior written
permission of the company.
INTRODUCTION
Safety Information
This manual contains information that must be observed in the interest of your
safety and to avoid damage to assets. Please read this manual before
installing and commissioning the device and keep the manual in an accessible
location for all users.
Contains FCC ID: W70MRF24J40MDME
Caution: To satisfy FCC RF Exposure requirements for mobile and base station
transmission devices, a separation distance of 20 cm or more should be
maintained between the antenna of this device and persons during operation. To
ensure compliance operation at closer than this distance is not recommended.
The antenna used for this transmitter must not be co-located or operating in
conjunction with any other antenna or transmitter. No other antenna may be
used with this equipment other than the PCB antenna supplied with this
equipment. Please see the Certifications section for more information on RF
Exposure Compliance
Hardware Features
Our range of IWT wireless transmitters are available for a wide range of input
types.
The IWmAT 4-20 mA Transmitter has been designed to accept an input from an
existing 4-20 mA signal and transmit the value to one of the IWR range of
receivers.
Please note that the IWmAT does not power the 4-20 mA loop, if powering a
standard 4-20 mA wired transmitter is required please use the IWTxT unit
instead.
Depending on the receiver used, the value can be outputted as either a 4-20 mA or 1-5 V dc signal, displayed and logged on a PC, output as a Modbus RTU or TCP/IP register, or transmitted to a remote server using MQTT messages. The range of receivers available is shown in the table below.
| Receiver Type | Features |
|---|---|
| IWR-1 | 1 off 4-20 mA or 1-5 V and 1 off Relay Output |
| IWR-5 | 5 off 4-20 mA or 1-5 V and 1 off Relay Output |
| IWR-USB | Connects to any PC for data display and logging |
| IWR-PORT | Stores data from IWT transmitters as Modbus Registers |
| IoT-Gateway | Stores data from IWT Transmitters & sends it to remote servers |
using MQTT packets
The IWTaT and IWTRhT transmitters work within the ISM license-free
2.4 GHz bands. Ranges of up to 500 m are possible using the standard
transmitter and receiver unit with the optional 3dBi antenna giving a range of
up to 750 m.
The transmitter is powered by a primary 3.6 V lithium cell and care must be
taken to insert the battery in the correct polarity.
UNPACKING
The instrument should be carefully inspected for signs of damage that may have occurred in transit. In the unlikely case that damage has been sustained, DO NOT use the instrument, but please retain all packaging for our inspection and contact your supplier immediately.
PRODUCT IDENTIFICATION LABEL
- The unit delivered should be carefully inspected to ensure it is suitable for the application required. Detailed information on the product is included in the identification label and the user manual.
- Please ensure, in particular, that the input range of the IWT is suitable for the intended application and that the IWT unit will not be subjected to temperatures greater than those specified in this manual.
INSTALLING/CHANGING THE BATTERY
- A Lithium 3.6 V battery is included inside the IWT transmitter. The battery may be changed at any time, but care must be taken to install the battery with the correct polarity.
- After the battery has been changed, the unit should be switched on using the yellow slider switch SW3 and then the pushbutton SW1 should be pushed and held for 5 s. This is to ensure the battery life count is reset correctly when a new battery is installed.
- The internal red LED will flash 5 times to indicate this procedure has been carried out successfully.
- The battery life is determined by the rate the transmitter sends the Temperature value to the receiver, this update rate can be selected using Dip Switch 1 and the default value is 10s.
- Please dispose of all batteries as specified by the legislator according to the Closed Substance Cycle and Waste Management Act or country regulations.
WARNING !
- INCORRECT BATTERIES MAY DAMAGE THE UNIT USE ONLY 3.6 V LITHIUM C CELL BATTERIES
- MAKE SURE THE CORRECT BATTERY POLARITY IS OBSERVED
SETTING UP THE IWT WIRELESS TRANSMITTER
The IWT instrument is shipped in a default configuration which allows the unit
to connect with any default IWR receiver unit and transmit the measured signal
every 10 s simply by switching the unit on using SW3 on the internal circuit
board.
If a different update rate is required, or a different network frequency
channel is required these parameters can be selected using DIP Switch 1 as
detailed below
Switches 1, 2, 3 & 4 select the RF Network the IWT will transmit on. The default network for both the IWT transmitter and IWR receiver is network 1
| RF NETWORK | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1 | 0 | 0 | 0 | 0 |
| 2 | 0 | 0 | 0 | 1 |
| 3 | 0 | 0 | 1 | 0 |
| 4 | 0 | 0 | 1 | 1 |
| 5 | 0 | 1 | 0 | 0 |
| 6 | 0 | 1 | 0 | 1 |
| 7 | 0 | 1 | 1 | 0 |
| 8 | 0 | 1 | 1 | 1 |
| 9 | 1 | 0 | 0 | 0 |
| 10 | 1 | 0 | 0 | 1 |
| 11 | 1 | 0 | 1 | 0 |
| 12 | 1 | 0 | 1 | 1 |
| 13 | 1 | 1 | 0 | 0 |
| 14 | 1 | 1 | 0 | 1 |
| 15 | 1 | 1 | 1 | 0 |
| 16 | 1 | 1 | 1 | 1 |
Switches 5, 6 & 7 select the Transmission rate of the unit. This effectively
sets how often the measured value is sent to the receiver.
At 1 and 5 second rate, a power save option is available (on by default) that
changes the transmit time to every 30 seconds if the IWR is switched off or
out of range for more than 3 minutes. This option can be changed using the
IWT-SET program
| Transmit time | 5 | 6 | 7 |
|---|---|---|---|
| 10 seconds | 0 | 0 | 0 |
| 20 seconds | 0 | 0 | 1 |
| 30 seconds | 0 | 1 | 0 |
| 60 seconds | 0 | 1 | 1 |
| 120 seconds | 1 | 0 | 0 |
| 600 seconds | 1 | 0 | 1 |
| 1 second | 1 | 1 | 0 |
| 5 seconds | 1 | 1 | 1 |
Switches 8, 9, and 10 set the Channel Number of the transmitter. This is used
with the 5 channel receiver unit (IWR-5) to select which IWT wireless
transmitter is linked to which 4-20 mA or 1-5 V dc output channel.
Channels 1 to 128 can be used with an IWR-USB, IWR-PORT, or IoT Gateway
receiver. The channel number can be changed using the IWT-SET PC configuration
software if switches 8, 9, and 10 are switched to the on position
| 1 | 0 | 0 | 0 |
|---|---|---|---|
| 2 | 0 | 0 | 1 |
| 3 | 0 | 1 | 0 |
| 4 | 0 | 1 | 1 |
| 5 | 1 | 0 | 0 |
| 6 | 1 | 0 | 1 |
| 7 | 1 | 1 | 0 |
| 8 (or 1 to 128) | 1 | 1 | 1 |
The IWT transmitter is now set up and ready to be used. Install the unit where
required, wire the appropriate input into the IWT as specified below (if there
isn’t an integral sensor), and switch the unit ON using SW3. Pushbutton switch
SW1 can be pushed to force the unit to transmit its current measured value. A
red LED 1 will flash once when the transmit button is pressed and flash a
second time if the transmission has been received and acknowledged by an IWR
receiver unit.
If the unit has transmitted successfully, the output of the connected receiver
unit will output a value reflecting the signal level being measured
TROUBLESHOOTING GUIDE
| Problem encountered | Possible Causes |
|---|---|
| LED1 doesn’t flash when pushbutton SW1 is pressed | Unit not switched on, |
switch on using SW3.
The battery is not installed correctly. The battery needs replacing.
LED1 only flashes once when SW1 is pressed| IWR receiver not switched on.
IWR receiver is not set up for the same RF network.
IWR receiver not within range of the transmitter.
If an IWR-1 receiver is used, ensure that the transmitter is set to Tx Channel 1
Output from the IWR receiver isn’t| IWR receiver set up incorrectly, see
equivalent to the signal being monitored|
IWR user manual for further details. Check that the green external LED on the
receiver is flashing when the transmitter push button is pressed as
the receiver may be out of range.
---|---
SYSTEM PART NUMBERS
| Part Number | Input Range | Terminal Connection |
|---|---|---|
| IWTaT-000 | Ambient Temperature | N/A |
| IWTRhT-000 | Ambient Temp & RH | N/A |
| Receiver Part Number | Number of Output Channels | |
| --- | --- | |
| IWR-1 | One | |
| IWR-5 | Five | |
| IWR-USB | Data from up to 128 IWT Transmitters | |
| IWR-PORT | Data from up to 128 IWT Transmitters | |
| IoT-Gateway | Data from up to 128 IWT Transmitters | |
| IANT-3 | 3 dBi Antenna |
SPECIFICATIONS
System Performance|
---|---
|
Accuracy Temperature| <± 0-4 °C at 30 °C
Accuracy RH| <± 3% between 10 & 90% RH
|
|
|
Input range| -40 to +120 °C
Ambient Temperature| -20 to +80 °C
Storage Temperature| -20 to +80 °C
|
|
|
|
|
Weight| 310 g
RF Transmitter| Contains FCC W70MRF24J40MDME
Power Requirements| Lithium Thionyl Chloride C 3.6 V Cell
Battery Life| 5 Years (10s transmission rate)
|
Dimensions| 79 mm x 79 mm x 52mm (L x W x D)
Mounting| Any Orientation
CONTACT US
EUROPE
+44 (0)1202 897969
c3w_sales@sensata.com
Cynergy3 Components Ltd.
7 Cobham Road, Ferndown Industrial Estate, Wimborne, Dorset,
BH21 7PE, United Kingdom USA
+1 310 561 8092 / +1 866 258 5057
c3wsales@sensata.com