• Integrated Process Systems

Digital Telemetry Systems

Integrated Process Systems offer Digital Telemetry Systems. This is used for strain gage/ Torque applications on rotating shafts. The TELL-PCM single-channel telemetry system offers the easiest handling for the wireless transmission of strain gage signals from rotating shafts. The very small encoder 35 x 18 x 12 mm with a weight of 13g. The transmitter (encoder) part is simply mounted on the rotating shaft with a special fiber reinforced tape. Powering of the transmission part and the digital data transfer between transmitter and receiver is realized inductively. Functional Description: The TELL-PCM transmitter provides a pulse code modulated signal (PCM) to an induction winding around the shaft (max. diameter 500mm). The magnetic field of this winding enables the inductive transmission of the signal to the pickup coil. From there the signal is transferred by cable (5 > m) to the receiver. The maximum distance between the transmitter coil and the pickup is 20mm. The receiver unit offers a BNC connector at the front panel with analog outputs f 10 V and a optional a digital output for PCM interface ECIA100 (for notebooks) or IF16 (PCI Desktop). An LED bar indicator shows the actual level and a successful Auto Zero calibration. Overload is indicated by the last LED's in pos. or peg. direction of the bar graph. These OVL-LED "s operate in peak-hold mode and are reset by pressing the overload switch. Strain gage sensors (>350 Ohm) in full- and half- bridge configuration can be directly connected to the transmitter. The excitation is fixed to 4 Volt DC and the gain is set by the gain switch on the receiver side. An auto-zero (AZ) adjustment is executed by pressing the AZ button on the front side of the receiver. The successful AZ operation is indicated by a yellow LED in the middle of the LED bar indicator. When the AZ completes the LED continuously illuminates. Additional to the AZ you have the possibility to calibrate the bridge by external shunt. (+ and -). The AZ setting is stored in a Flash-RAM and thus is not lost during power-off. Use only shielded sensor cable.