Wireless Sensor Transmitter Voltage Acquisition FASTT24-VAF OEM Module
Description
The T24-VAFe OEM Board provides wireless voltage measurement for an input range of 0 to 10 Volts. Suitable for a range of 0-10 V sensors including 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.
Avaliable with integral or external Antenna.
Low power modes allow the module 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 module can be configured to last several years on 2 x alkaline AA batteries.
The wireless voltage transmitter 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.
The licence free 2.4 GHz direct sequence spread spectrum (DSSS) radio 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
Using Mantracourt’s proprietary 2.4 GHz wireless telemetry electronics, the wireless sensor transmitter module provides exceptional performance in the field with a battery life of up to 5 years, by ‘powering down’ between transmissions or ‘powering off’ completely.
*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
- 0-10 Volt input
- Miniature PCB for fitting inside sensors
- Low power mode
- Remote power ‘on’ and ‘off’
- Ultra fast update rate of 2,000 per second
- Simple wireless configuration and calibration
- Antenna options giving up to 800 m (2,600 ft) range
- High Resolution up to 1 part in 400,000 (18bit)
- Wireless voltage to radio telemetry converter
- Transmits on licence free 2.4 GHz
- Simple wireless configuration and calibration
Specifications
| Measurement Specifications | |
|---|---|
| Input range | 0 to 10 Vdc |
| Calibrated range | 0 to 10 Vdc |
| Input impedance | 100,000 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 | 15,000/13.75 |
| Transmission rates | Up to 2000 per second |
| 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 with suitable cables existing through cable glands | OEM Board |
| Power Supply | |
|---|---|
| ACMm | 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 | PCB Printed or External |
Dimensions
37.5mm x 16.8mm x 6.6 mm
Downloads
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 strain gauge transmitter modules calibrated? |
| A | The modules are factory calibrated to 2.5 mV/V which can be custom calibrated and linearised over up to 9 points by using the T24 Toolkit. |
| 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 | How is the strain gauge transmitter module calibrated? |
| A | The modules are factory calibrated to 2.5 mV/V which can be custom calibrated and linearised over up to 9 points by using the T24 Toolkit. The T24-SAf has fixed factory calibration and cannot be linearised. |
| 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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