Wireless Sensor Transmitter Current AcquisitionT24-IA OEM Module
Description
The T24-IA provides wireless current sensor transmitter, provides wireless current measurement for an input range of 0-20 mA. Suitable for a range of 4-20 mA sensors such as pressure, inclinometer, accelerometer, temperature & displacement. The small module size allows for the option of embedding it within the sensor housing. Provides 5 V sensor power.
Low power modes allow the T24-IA wireless current (4-20 mA) sensor transmitter to ‘power down’ between transmissions or to ‘power off’ completely and can be controlled by other T24 products such as the handheld displays or a base station. The T24-IA can be configured to last several years on 2 x alkaline AA batteries or alternatively powered from 2 x NiMH or 1 x 3 V Lithium.
The high accuracy, low noise measurement electronics in the T24-IA delivers high resolution, low drift results which can be user calibrated over 9 points to enable linearization and to deliver results in user definable engineering units. The results can be transmitted wirelessly at rates up to 200 per second to other T24 devices such as handheld displays, analog outputs and base stations etc.
The module is configured and calibrated (either by applying known inputs or by table entry) using free T24 Toolkit software which runs on a PC connected to a T24 base station.
Integral antenna option offers up to 600 m (1969 ft) range and external antenna options allows up to 800 m (2600 ft) range in an open field site.
The licence free 2.4 GHz direct sequence spread spectrum (DSSS) radio telemetry technology offers high integrity, error free communications which can co-exist with other wireless technologies such as Wi-Fi, Bluetooth® and Zigbee®. FCC, ETSI and IC approvals.
Module transmits and Receives giving:
1. Full error detection and correction
2. Ability to switch to low power modes
3. Calibration & configuration via radio telemetry
4. Ability to be switched from sleep to operating mode via radio
5. Calibration stored within the module
6. Remote battery check
*Maximum range achieved in open field site with the T24 acquisition module at a height of 3 metres (9.8 feet) above ground and T24-HS held at chest height pointing towards the acquisition module. Specification at 3V supply at 25°C
Product Features & Benefits
- 0-20 mA input
- Miniature PCB for fitting inside sensors
- Low power mode
- Remote power ‘on’ and ‘off’
- High speed 200 updates per second
- Transmits on licence free 2.4 GHz
- Simple wireless configuration and calibration
- Antenna options giving up to 800 m (2,600 ft) range
Specifications
| Measurement Specifications | |
|---|---|
| Input range | 0 to 20 mA |
| Calibrated range | 4 to 20 mA |
| Input impedance | 47 Ω |
| Input calibration accuracy | 0.1%FR |
| Offset temperature stability (maximum) | 0.5 ppm/ºC |
| Gain temperature stability (maximum) | 50 ppm/ºC |
| Non linearity before linearization (max) | 25 ppm of FR |
| Internal resolution/Bits | 16,000,000 / 24 |
| Noise free resolution/Bits at 1 sample per second | 30,000/14.75 |
| Transmission rates | From 5ms to 1 day |
| Excitation available | 5 Vdc @ 50 mA |
| Environmental | |
|---|---|
| Operating temperature range | -20 to 55 ºC |
| Storage temperature range (no batteries) | -40 to 85 ºC |
| Maximum humidity | 95%RH |
| Environmental protection | N/A (OEM Board) |
| Power Supply | |
|---|---|
| 2.1 to 3.6 Vdc |
| Battery Life, Transmitting results at 3 per second | no excitation required |
|---|---|
| Pair AA cells constantly on | 1 month |
| Pair AA cells 12 sessions per day of 5 mins | 2 years |
| Radio | |
|---|---|
| Radio type | Licence exempt transceiver |
| Radio frequency | 2.4 GHz |
| Transmit power | 10 mW |
| Range | Up to 800 m |
| Antenna | Internal or External (option) |
Dimensions
37.5mm x 16.8mm x 6.6mm
Downloads
T24 Wireless Telemetry User Manual V.01-15
T24 Wireless Telemetry Toolkit
100 Channel Logging & Visualisation Software (T24LOG100)
White Paper – A Guide to Effective T24 Wireless Telemetry Installation
Technical Guide – Carrying Out a Wireless Site Survey
White Paper – Getting The Best From Wireless Instrumentation
FAQ
| Q | What are the sampling rates of the transmitter modules? |
| A | The T24 standard transmitter modules (SA, IA, VA, RA, TA, PA) sample from 0-200 updates/sec. The T24-SA fast transmitter modules are fixed at 2,000 updates/sec. |
| Q | What is the resolution of the transmitter modules? |
| A | The noise free resolution for a sample time of 10 milli-seconds or less is 15.5 bits for the T24 SA, 12.5 bits for the T24-VA, 14 bits for the VA and 12.25 bits for the T24IA.
The T24-PA’s accuracy % input error @ 1 Hz is 0.15% and for the T24 RA the accuracy is 0.01% of the full scale. With increased sample times resolution can be increased up to 18.75 bits for the T24-SA. |
| Q | What is the supply voltage for the transmitter modules? |
| A | 3V for the transmitter modules and handheld displays. Other modules in the range take 9-36 V. |
| Q | How are the modules powered? |
| A | Two standard AA batteries or the T24-BC1 Battery Charger, which provides a re-chargeable power supply using a Li-ion Cell. |
| Q | What is the difference between the “i” and “e” versions of the transmitter units? |
| A | The ‘i’ modules all feature an on-chip integrated antenna. The ‘e’ modules are fitted with a miniature UFL connector which can be used with any of the antenna options available; the T24-ANTA (PCB antenna) or T24-ANTB (fixed 90 degree Whip antenna) or T24-ANTC (flexible whip antenna) or T24-ANTD (‘puck’ antenna fitted with a 0.6m cable and RPSMA connector and supplied with a 100 mm RPSMA to UFL adaptor cable) or T24-ANTE (‘puck’ antenna fitted with a 100 mm cable and UFL connector). |
| Q | What software is provided with the T24 devices? |
| A | All devices are supported by the T24 Tool Kit which allows users to configure all devices from the T24 range as well as view and log data from transmitters modules in range. The software can also be downloaded directly from our website. |
| Q | How many devices can operate on one radio channel? |
| A | Many devices can operate on the same radio channel depending on the sample rate of the transmitter modules present in the system. The radio channel is capable of supporting up to 200 data packets per second. |
| Q | Can PC software gather data from many devices? |
| A | Yes, Mantracourt provides freeware for logging up to 100 inputs to one base station, in addition the free Windows DLL and COM driver can be used to gather data through a customer’s own PC software. |
| Q | What limits the RF range of the devices? |
| A | Any metal surface will reflect 2.4 GHz radio waves, therefore in a sealed metal box, no RF will escape. However by providing a suitable RF window the signals will propagate out. Water and concrete also limit the RF range. |
| Q | Â What Frequency does the system operate on? |
| A | Licence free world wide 2.4GHz, although this frequency is used by other equipment, the T24 range has been tested with Bluetooth, Zigbee & WiFi devices without conflicts. |
| Q | Is the system point to point? |
| A | Yes, however the modules may also operate in many to one (such as multiple data transmitters modules communicating with a base station) and one to many (such as a data transmitter module supplying data to multiple handhelds and displays). |
| Q | Â Is it possible to use wireless range extenders within T24 network? |
| A | The T24-AR wireless range extender which can be added to the system can propagate a signal around corners and obstacles. This unit can also double the effective range – but only once. |
| Q | What sensors would these inputs cover? |
| A | Any sensor that provides a voltage, current or ratio metric interface can be connected to an transmitter module, including load cells, inclinometers, accelerometers, displacement LVDT, pressure, potentiometer, pulse, temperature, humidity, ph, shock |
| Q | What is the communication protocol? |
| A | Proprietary protocol based on a 802.15.4 chip. This allows the T24 range to co-exist with Bluetooth, Zigbee & WiFi devices without conflicts. |
| Q | Â What are the sampling rates of the transmitter modules? |
| A | The T24 standard transmitter modules (SA, IA, VA, RA, TA, PA) sample from 0-200 updates/sec. The T24-SA fast transmitter modules are fixed at 2,000 updates/sec. |
| Q | What is the resolution of the transmitter modules? |
| A | The noise free resolution for a sample time of 10 milli-seconds or less is 15.5 bits for the T24 SA, 12.5 bits for the T24-VA, 14 bits for the VA and 12.25 bits for the T24IA.
The T24-PA’s accuracy % input error @ 1 Hz is 0.15% and for the T24 RA the accuracy is 0.01% of the full scale. With increased sample times resolution can be increased up to 18.75 bits for the T24-SA. |
| Q | Â What is the supply voltage for the transmitter modules? |
| A | 3V for the transmitter modules and handheld displays. Other modules in the range take 9-36 V. |
| Q | How are the modules powered? |
| A | Two standard AA batteries or the T24-BC1 Battery Charger, which provides a re-chargeable power supply using a Li-ion Cell |
| Q | Can power be provided to a sensor? |
| A | Yes, all transmitter modules feature a 5V supply (except the T24-PA which has excitation available in 3,5,12 Vdc @25 mA) which is the excitation voltage used by the T24-SA strain gauge transmitter module. |
| Q | In the T24 transmitter range what is the difference between the ‘i’ and ‘e’ ? |
| A | The ‘i’ modules (T24-SAi, T24-SAfi, T24-VAi, T24-IAi) all feature an on chip integrated antenna. The ‘e’ modules (T24-SAe, T24-SAfe, T24-VAe, T24-IAe) are fitted with a miniature UFL connector which can be used with any of the antenna options available; the T24-ANTA (PCB antenna) or T24-ANTB (fixed 90 degree Whip antenna) or T24-ANTC (flexible whip antenna). |
| Q | How many transmitter modules can be acquired by the base stations? |
| A | Each base station can use one of 15 channels. From that selected channel a base station can collect data simultaneously from any number transmitter modules depending upon the frequency of readings being provided by the transmitter module. |
| Q | What are the input ranges of the T24 transmitter modules? |
| A | T24-SA 2.5mV/V calibrated strain gauge based measurement; T24-VA 0-10V, T24-IA 4-20mA, T24-TA pt100 sensor input, T24-RA potentiometer 500 to 100000 Ohms and T24-PA 0.5Hz to 3kHz. |
| Q | How many transmitter modules can be acquired by the base stations? |
| A | Each base station can use one of 15 channels. From that selected channel a base station can collect data simultaneously from any number transmitter modules depending upon the frequency of readings being provided by the transmitter module. |
| Q | What are the input ranges of the T24 transmitter modules? |
| A | T24-SA 2.5mV/V calibrated strain gauge based measurement; T24-VA 0-10V, T24-IA 4-20mA, T24-TA pt100 sensor input, T24-RA potentiometer 500 to 100000 Ohms and T24-PA 0.5Hz to 3kHz. |
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