Wireless Telemetry Pulse Acquisition Module (T24-PA)

The high performance T24-PA pulse acquisition device is specifically for the collection and processing of pulse related measurements. To provide wireless outputs in rpm, Hz and time as well as actual pulse counting and measuring the period between pulses.

Ensuring data integrity and security and avoiding local radio interference, the mini PCB module uses on license-free 2.4Ghz.

Data is provided in real time at variable speeds with a direct line of sight range of up to 200 meters which can be extended with the use of high gain antenna’s and repeaters, view our range of antennas here.

The module transmits to a range of receivers including handheld indicators, digital displays, analogue and serial outputs, PC display and wireless printer and has various powering options, to view our range click here    

Also available in IP rated enclosures.
See T24-ACM-PA, T24-ACMi-PA and T24-ACMm-PA

 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
 

Product order options

These are the following industries and applications in which this product has been used:

• Automotive - Measuring the Output Power of a Motor
• Agriculture - Vessel Level Control & Flow Sensing

Q: What types of inputs can be used?

A: Any volt free contact input such as relays, voltage sources (up to 24 volts) and NPN open collector inputs.

Q: How accurate is the measurement?

A: The worst case accuracy is stated as 0.25% at the top end of the input range i.e. 3 kHz. Just under half this error is to allow for temperature drift over the full operating temperature range of the device (-40 to +85 degrees) so the accuracy in a stable temperature environment is far less. At slower input rates (down to 1Hz) the accuracy increases further down to 0.15% where 0.1% allows for temperature drift.

Q: How do I calibrate the output?

A: The device is factory calibrated to the nearest 0.25 μS which provides users with a set of predefined outputs; Hz, RPM and Period. All of these values can have a custom gain and offset applied to them, the resulting output can therefore be in whatever units or range of values you require.

Q: What is the counter, and its maximum value?

A: The counter is a counter which increments every time a pulse is detected either on rising or falling edge which can be set in the tool kit. When counting pulses the sample time and transmit intervals must be set to the same value. Low power cannot be used to ensure the input is constantly sampled. The maximum value for the counter is 4,294,967,295 at which point the counter will overflow.

Q: How do I reset the counter value?

A: The counter value can be reset either by contacting the digital input to the ground or by transmitting a data packet with a defined data tag from another device, such as a T24-HA, T24-RM1 or even another T24 acquisition module.

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
acquisition 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 acquisition modules present in the system. There are 16 channels available with each one 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 24 inputs to one base station, in addition the open COM driver can be used to gather data through customers own PC software to applications in Visual Basic which in turn has been used to integrate the T24 system with Lab View.

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.

Q: 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 with out conflicts.

Q: Is it possible to use repeaters within T24 network?

A: The T24-AR Active repeater which can be added to the system can propagate a signal around corners and obstacles. This unit can also double the effective range.

Q: Is the system point to point?

A: Yes, however the modules may also operate in many to one (such as multiple data acquisition modules communicating with a base station) and one to many (such as a data acquisition module supplying data to multiple handhelds and displays).

Q: What sensors would these inputs cover?

A: Any sensor that provides a voltage, current or ratio metric interface can be connected to an acquisition 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 804.15.4 chip. This allows the T24 range to co-exist with Bluetooth, Zigbee & WiFi devices with out conflicts.

Q: What are the sampling rates of the acquisition modules?

A: The T24 standard acquisition modules (SA, IA, VA, RA, TA, PA) sample from 0-200 updates/sec. The T24-SA fast acquisition modules are fixed at 2,000 updates/sec.

Q: What is the resolution of the acquisition 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 acquisition modules?

A: 3V for the acquisition modules and handheld displays. Other modules in the range take 9-36 V.

Q: How are the modules powered?

A: The ACMm is the smallest module and has a separate battery pack (T24-BB1 using 2 x AAA). The T24-ACMi is the mid size module and provides power via 2 x AA batteries and has terminal block style field connectors for wiring to acquisition modules. The T24-ACM although larger can provide power from an external power supply (5-18V) as well as 2 x D cell batteries which provide a higher battery capacity allowing for longer battery life.

Find out the battery life of your system using our Battery Calculator.
 

 

Q: Can power be provided to a sensor?

A: Yes, all acquisition modules feature a 5V supply which is the excitation voltage used by the T24-SA strain gauge acquisition module.

Q: How is the strain gauge acquisition 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: What is the difference between the ‘i’ and ‘e’ versions of the

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 acquisition modules can be acquired by the base stations?

A: Each base station can use one of 16 channels. From one of those channels a base station can collect data simultaneously from any number acquisition modules depending upon the frequency of readings being provided by the acquisition module.

Q: What are the input ranges of the T24 acquisition 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.