Strain Gauge Data Acquisition (T24-ACM)

Strain Gauge Data Acquisition (T24-ACM) The largest of the T24 wireless sensing modules, the Strain Gauge Data Acquisition (T24-ACM) offers high performance wireless sensing measurement for strain gauge, current or voltage input sensors. Now available with pulse, potentiometer or temperature inputs – see order information tab above. Using Mantracourt’s proprietary 2.4 Ghz wireless telemetry electronics, the […]

Strain Gauge Data Acquisition (T24-ACM)

The largest of the T24 wireless sensing modules, the Strain Gauge Data Acquisition (T24-ACM) offers high performance wireless sensing measurement for strain gauge, current or voltage input sensors.

Now available with pulse, potentiometer or temperature inputs – see order information tab above.

Using Mantracourt’s proprietary 2.4 Ghz wireless telemetry electronics, the 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.

Offering housing for a pair of alkaline ‘D’ cells, the module also has a regulator circuitry for an external power supply. The batteries can also be used to provide power in case of external supply failure. For easy wireless sensing, the unit provides connections via the 2 part screw terminals and provide environmental sealing to IP65 NEMA 4.

The 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 Strain Gauge Data Acquisition (T24-ACM) 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.

The module offers a wireless range of up to 800m in open field site.

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.

See the battery life of your wireless sensing system using Battery Life Calculator.

For OEM’s, miniature PCB’s are available for each input. See T24-SA, T24-VA, T24-IA, T24-TA, T24-PA, T24-RA

  • Robust wireless sensing module in IP65 NEMA 4 enclosure
  • Choice of inputs – strain, 0-20mA, 0-10V
  • NEW inputs now available – temperature, pulse or potentiometer
  • Internal antenna provides up to 200m (650 ft) range
  • Self contained batteries and regulated external power supply
  • Easy connectivity to sensor with 2 part screw terminals for wireless sensing
  • Exceptionally low power for long battery life (up to 5 years)
  • Remote power ‘on’ and ‘off’

Strain Gauge Data Acquisition (T24-ACM)

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 100 (325) Metres (feet) **
External Antenna 200 (650) Metres (feet) **
Channels (DSSS) 16
T24-ACM
Electrical
Power Supply Voltage 2.1 3.0 3.6 VDC
Power Supply Ripple Voltage 50 mV ac pk-pk
Power Supply Current
Normal Mode on Constantly 40 45 mA
Sleep Mode 5 20 uA
Environmental
IP Rating IP65 /NEMA 4
Operating Temperature Range* -40 85 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

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