Mantracourt Electronics Limited
T24-SAf Fast Strain Gauge Acquisition Module User Manual
2
Introduction / Overview
For high speed applications the T24-SAf provides measurements at 2KHz with 200 packets per second containing
10 x 32 bit values representing nano volts/volt.
The T24-SAf will usually be used in conjunction with an analog output module or for supplying data to a
computer via a base station.
Please note that these modules are not suitable for use with T24 handheld displays.
Connections
You will require a 3 Volt dc supply for the acquisition module which may be 2 X AA alkaline batteries.
Power
Attach power supply wiring to the module as shown below:
+ 3V Supply
0V Supply
Connect to a 3 Volt power supply or batteries.
WARNING: This module is not reverse polarity protected!
WARNING: The maximum voltage is 3.6V!
Input Connections
Strain Gauge
Strain gauge connection is 4 wire as follows:
+EXC
SHLD
-EXC
-SIG
+SIG
The resistance of the strain gauge can be between 85 and 5000 Ohms. The T24-SAf can support up to 4 350Ohm
strain gauges bridges attached in parallel (At the expense of reduced battery life).
The cable lengths between the T24-SAf and the gauges should be kept below 3 meters and generally as short as
possible.
As the measurement is 4 wire the longer the cable the more inaccurate the measurement from the factory
mV/V calibration will be due to voltage drops in the cable.
The cable should be of good quality and shielded at either the T24-SAf SHLD point and should not be connected
to the metal housing of the load cell.
The strain gauge measurement is bi-directional, i.e. tension & compression.
