The Accumetrics' Battery Powered Telemetry System
Model AT‑5000 EasyApp provides easy, dependable wireless measurements, including torque measurements, strain measurements, and more, from a rotating shaft. Measure torque live in real-time with this battery-powered, digital telemetry system. Featuring
a low mounting profile and low power consumption, the system requires no shaft modifications and is fastened to the shaft using a single, sturdy aramid fiber strap. AT‑5000 EasyApp is an ideal non-contact data transmission solution for applications
requiring easy installation and dependable data retrieval, even in high RPM applications.
The Battery Powered Telemetry System Model AT-5000 EasyApp utilizes a small battery powered transmitter mounted using an aramid fiber strap to directly measure, digitize, and transmit true torque data from rotating half-shafts, driveshafts, and rotors
of all sizes and speeds. The system is also used for temperature, voltage, and acceleration sensing.
The AT-5000 EasyApp uses a long-life lithium battery to excite a strain gage and to power the AT-5000 telemetry electronics on the rotating
shaft. The small signal resulting from torque applied to the shaft is amplified, anti-alias filtered, and digitized (typically at 11,718 samples per second). The digital data is reliably RF transmitted off the rotating shaft to a nearby pickup coil,
which is connected to a receiver. The receiver converts the digital data to an analog voltage output (adjustable from 0 ± 1.0 to ± 10 volts). This DC to 1 kHz (or optionally higher) bandwidth voltage output can be fed directly to a data
acquisition system, FFT analyzer, or an oscilloscope.
 |  |  |
| AT-5000 Transmitter and P/U coil | AT-5000 Receiver | AT-5000 Receiver |
 |  |  |
| AT-5000 Transmitter for > 0.9"/22.86 mm Diameters | AT-5000 Transmitter for > 2.0"/50.8 mm Diameters | AT-5000 Transmitter for > 8.0"/203.2 mm Diameters |
| SPECIFICATIONS | |
|---|---|
| Transmitter Modules - Sampling Rate / Typical Bandwidth | |
| Channel A Transmitter | 7812 samples per second; DC to 1.2 kHz frequency response; 4 MHz transmitter |
| Channel B Transmitter | 11,718 samples per second; DC to 1.2 kHz frequency response (DC to 5 kHz available); 6 MHz transmitter frequency. (Channel A and B units can be co-located for 2-channel use.) |
| Transmitter Module [1] | |
| Non-linearity | <0.1% of full scale (typical) |
| Digital Resolution | 12-bit (0.025% of full scale) |
| Gain Drift | 100 PPM/°C typical, exclusive of external gain resistor |
| Offset Drift | 0.7 μV/°C typical (0 85 °C) |
| Bandwidth | DC to 1.2 kHz (up to 5 kHz bandwidth available; AC coupling also available) |
| Power | Typically <4 mA current draw from 3.6 V battery, excluding sensor excitation |
| Temperature | -40 to 185 °F (-40 to 85 °C) High Temperature option is available |
| Battery | |
| Battery Voltage | 3.6 V open circuit; 3.4 V loaded. Low battery indication is transmitted to receiver at approximately 2.7 V. |
| Bridge Excitation | 2/3 length AA. Single use Lithium battery. Note: Non-rechargeable batteries. Do not store or use in applications with exposure to >302 °F (150 °C) temperatures. |
| Battery Life | 95 hours for 1000 Ω and 75 hours for 350 Ω strain gages, continuous use |
| Receiver | |
| Power | 12 V nominal (9 to 18 VDC) Optional AC power supply 90-240 VAC, 12 VDC output |
| Output Range. Signals, & Adjustments | ±10 volts. Output gain can be adjusted to allow lower outputs (i.e. 5 V). (RSSI) Received Signal Strength Indicator -2 V to +4 V (antenna signal strength). Zero adjust, Gain adjust, and Unipolar/Bipolar output selection. |
| Dimensions (H x W x D) | NEMA style box: 3 x 6 x 4.25 in (76.20 x 152.40 x 107.45 mm) |
| Temperature | 32 to 125 °F (0 to 50 °C) |
| Pickup Coil Choices | |
| Flexible Loop | 24 in (610 mm) ID includes 10 ft cable to receiver |
| Rigid Brass Loop | Rugged 1/4 in brass loop. 1.25 in x 1.61 in x 2.94 in phenolic base. Includes 10 ft cable to receiver. |
| Transmitter Modules - Sensor Inputs | |
| Full Bridge Strain Gage | Including other bridge-style transducers, including pressure transducers, resistive accelerometers, load cells, torque transducers, etc. |
| Temperature | Type K thermocouple is standard. Standard range is -58 to -750 °F (-50 to 400 °C). RTD sensors can also be used; contact Accumetrics. |
| Voltage | 0 to 100 mV; external voltage divider can be provided for high voltage measurement. |
| Up to 2700 V measure with optional external dropping resistor | |
| HOUSING INFORMATION | ||
|---|---|---|
| Transmitter for > 0.9 in (22.86 mm) Diameters | ||
 | Radial Height | 0.78 in to 0.87 in (19.80 mm to 22.10 mm) |
| Axial Length | 2.0 in (50.80 mm) | |
| Weight | 0.185 lb (0.085 kg) | |
| Transmitter for > 2.0 in (50.8 mm) Diameters | ||
 | Radial Height | 0.67 in to 0.76 in (17.00 mm to 19.30 mm) |
| Axial Length | 2.0 in (50.80 mm) | |
| Weight | 0.152 lb (0.067 kg) | |
| Transmitter for > 8.0 in (203.2 mm) Diameters | ||
 | Radial Height | 1.0 in to 1.1 in max (25.40 mm to 27.95 mm) |
| Axial Length | 2.0 in (50.80 mm) | |
| Weight | 0.233 lb (0.11 kg) | |