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 data acquisition unit uses a pair of standard alkaline D cells and is configured using free T24 Toolkit software which runs on a computer connected to a T24 base station. External powering is also possible with a suitable dc power supply. Using good quality alkaline batteries, a 700ohm loadcell, a 100ms sample time at 3 readings a second with 24 hours a day operation the battery life is approximately 18 days. The Toolkit software will calculate typical battery life for a given set of conditions.
Loadcell connections are via field terminals. Full details are given in the manual.
If the unit is supplied with a loadcell it will normally be calibrated to read the loadcell output in the same force units as the loadcell calibration. A traceable system certificate will be supplied for this calibration. The loadcell and this unit are the only parts of the telemetry system that require calibration.
Alternative calibrations are possible; please consult our engineering department to discuss your requirements.
Complies with EMC directive, 2004/108/ECThe Radio Equipment and Telecommunications Terminal Equipment (R&TTE) Directive, 1999/5/EC. RoHS compliant.
| Parameter | Value | Unit |
|---|---|---|
| Battery voltage | 2.1 (Min) / 3 (Typical) / 3.6 (Max) | Vdc |
| External dc supply | 5 (Min) / 18 (Max) | Vdc |
| Bridge Excitation | 4.5 (Min) / 5 Typical / 5.25 (Max) | Vdc |
| Loadcell Excitation System | 4 wire | |
| Bridge Impedance | 85 (Min) / 5,000 (Max) | Ohms |
| Bridge Sensitivity | -3.2 (Min) / +3.2 (Max) | mV/V |
| Offset Temperature Stability | 1 (Typical) / 4 (Max) | ppm/°C |
| Gain Temperature Stability | 3 (Typical) / 5 (Max) | ppm/°C |
| Offset Stability with Time | 0.002 (Typical) / 0.008 (Max) | %FR * |
| Gain Stability with Time | 30 | ppm of FR /1st Year |
| Non-linearity | 0.0005 (Typical) / 0.0025 (Max) | % FR |
| Internal Resolution | 16 Million | Counts/Divisions |
| Resolution at 1000ms sample time * | 250,000 | Counts/Divisions |
| Resolution at 100ms sample time * | 120,000 | Counts/Divisions |
| Resolution at 10ms sample time * | 50,000 | Counts/Divisions |
| Maximum loadcell cable length | 3 | m |
| Operating temperature range | -20 (Min) / 55 (Max) | °C |
| Storage temperature | -40 (Min) / 85 (Max) | °C |
| Humidity | 0 (Min) / 95 (Max) | %RH Non condensing |
| Sealing | IP67 |
| Code | Description |
|---|---|
| T24-ACM/SA | Cased battery powered loadcell data acquisition unit. |
| T24 manual is available for download. The T24 system can be calibrated in a number of different ways depending upon the application. Please consult our engineering department for help with your requirements. | |
| Please see Engineering Sheet E035 for Frequently Asked Questions for the T24 Telemetry system. |
