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T24-ACMm - Wireless Sensing Module for Analog Sensors and Signals

Image T24-ACMm

The smallest of our T24 radio telemetry modules, the T24-ACMm offers high performance wireless sensing measurement for strain gauge, current, voltage input, pulse, temperature or potentiometer sensors.

Using Mantracourt’s proprietary 2.4 Ghz wireless telemetry electronics, the Wireless Telemetry Module for Load Cell, Strain Gauge Data Acquisition provides exceptional performance in the field with a battery life of up to 5 years, by ‘powering down’ between transmissions or ‘powering off’ completely.

The T24-ACMm has a standard internal antenna supplied and offers up to 500m (1600 ft) range in an open field site. 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 base stations.  

An optional battery pack can be chosen to power the T24-ACMm which uses 2 x AAA cells and can be connected via simple 2 part screw field terminals. Also offers the option to fit wired completion resistors allowing a strain input to be either full, half or quarter bridge input.

The T24-ACMm high accuracy, low noise measurement electronics deliver 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 at rates of up to 200 per second to other wireless sensing T24 devices such as handheld displays, analogue 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.

Alternative IP rated enclosures are available to suit a range of applications and environments. View our Enclosure Comparison Sheet to find the right solution. The license free 2.4GHz 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.

The T24-ACMm-SA strain version provides direct mV/V input and 5V bridge excitation for up to 4 load cells. For OEM’s, miniature PCB’s are available for each input. See T24-SA, T24-VA, T24-IA, T24-TA, T24-PA, T24-RA 


Technical Specifications

T24-ACMm

General Radio

Parameter Min Typical Max Units
Licence   Licence Exempt    
Modulation Method   MS (QPSK)    
Radio Type   Transceiver (2 way)    
Data Type   250   K bits/sec
Radio Frequency 2.4000   2.4835 GHz
Power   1   mW
Integral Antenna     500 (1600) Metres (feet) **
External Antenna     200 (650) Metres (feet) **
Channels (DSSS)   16    

T24-ACMm

Electrical
Power Supply Voltage (Battery) 2.1 3.0 3.6 VDC
Environmental
IP Rating   IP50    
Operating Temperature Range* -40   +80* C
Storage Temperature -40   +85 C
Humidity 0   95 %RH

T24-SA

Specifications with 1000R bridge, 2.5mV/V at 3V supply at 25 Deg C
Strain Gauge Excitation System    4 wire    
Strain Gauge Excitation Voltage  4.5  5 5.25  VDC
Strain Gauge Drive Capacity  85 5000 Ohms
Maximum Gauge Sensitivity (FR)     3.2 ±mV/V
Offset Temperature Stability    1 4 ppm/C
Gain Temperature    3 5 ppm/C
Offset Stability with Time    20 80 ppm of FR (1)
Gain Stability with Time     30 ppm of FR (2)
Non Linearity before Linearization    5 25 ppm of FR
Internal Resolution    16,000,000/24   Resolution/bits
Noise Free where Sample Time < 10mS    50,000/15.5   Resolution/bits
Noise Free where Sample Time < 50mS    65,000/16   Resolution/bits
Noise Free where Sample Time < 100mS    150,000/17.25   Resolution/bits
Noise Free where Sample Time < 1000mS    250,000/18   Resolution/bits
Noise Free where Sample Time < 10000mS    400,000/18.75   Resolution/bits

T24-VA

Specifications with 1000R bridge, 2.5mV/V at 3V supply at 25 Deg C
Input Range Sensitivity (FR) 0 - 10 Volts
Gain Temperature Stability - - 50 ppm/C
Non Linearity before Linearization - 5 25 ppm of FR
Internal Resolution - 16,000,000/24 - Resolutions/bits
Input Impedence - 100,000 - Ohms
Input Calibration Accuracy - - 0.1 %FR
Noise Free where Sample Time < 10mS - 5,000/12.25   Resolutions/bits
Noise Free where Sample Time < 100mS - 8,000/13.0   Resolutions/bits
Noise Free where Sample Time < 1000mS - 11,000/13.5   Resolutions/bits
Noise Free where Sample Time < 1000mS - 15,000/13.75   Resolutions/bits

T24-IA

Specifications with 1000R bridge, 2.5mV/V at 3V supply at 25 Deg C
Input Range Sensitivity (FR) 0 - 21 mA
Calibrated Range 4 - 20 mA
Gain Temperature Stability - - 50 ppm/C
Non Linearity before Linearization - 5 25 ppm of FR
Internal Resolution - 16,000,000/24 - Resolution/bits
Input Impedence - 47 - Ohms
Input Calibration Accuracy - - 0.1 %FR
Noise Free where Sample Time < 10mS - 5,000/12.25   Resolution/bits
Noise Free where Sample Time < 100mS - 8,000/13.0   Resolution/bits
Noise Free where Sample Time < 1000mS - 11,000/13   Resolution/bits
Noise Free where Sample Time < 1000mS - 15,000/13.75   Resolution/bits

T24-TA

Temperature Range -200   500 °C
Accuracy (-20 to +40 °C)   0.1 0.2 °C
Accuracy (-40 to +85 °C)    0.2  0.35 °C
Internal Resolution   16,000,000/ 24    Resolution/Bits
Noise Free where Sample Time < 5mS   13,000 / 13.5   Resolution/Bits
Noise Free where Sample Time < 10mS   17,000 / 14   Resolution/Bits
Noise Free where Sample Time < 100mS   62,000 / 16    Resolution/Bits
Noise Free where Sample Time > 1000mS   158,000 / 17    Resolution/Bits

T24-PA

Sensor Excitation Voltage 4.5 5 5.25 VDC
Input Range in Time 333 x 10-6 - 2 sec
Input Range in Frequency 0.5 - 3,000 Hz
Input Range in RPM (presuming 1 pulse / rev) 30 - 180,000 RPM
Accuracy % input error @ 1Hz - - 0.15 %
Accuracy % input error @ 1kHz - - 0.175 %
Accuracy % input error @ 2kHz - - 0.2 %
Accuracy % input error @ 3kHz - - 0.25 %
Accuracy Interval Resolved to   0.25   u sec

T24-RA

Sensor Excitation Voltage 4.5 5 5.25 VDC
Input Range 500   100,000 Ohms
Accuracy   0.01   % of full scale
Battery Life in Low Power Mode Generating Results at 3HZ
  Useage Battery Life
Pair AA Cells Constant On 1 Month
Pair AA Cells 12 sessions per day of 5 mins 2 Years
Pair D Cells Constant On 2.5 Months
Pair D Cells 12 sessions per day of 5 mins 5 Years

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

* Check operating temperature batteries intended for use. 

**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


Order Info

T24-ACMm Module Code
Strain Acquisition T24-ACMm-SA
Fast Strain Acquisition T24-ACMm-SAf
Current Acquisition T24-ACMm-IA
Voltage Acquisition T24-ACMm-VA
Temperature Acquisition T24-ACMm-TA
Pulse Acquisition T24-ACMm-PA
Potentiometer Acquisition T24-ACMm-RA
Accessories Code
Aquisition Battery only for T24-ACMm T24-BB1