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Digital one channel "HIGH SPEED" (50kHz) telemetry system for strain gage and ICP applications on rotating shafts “Controlled Gain and AZ at receiver side” Signal bandwidth up to 50,000, Distance <-> transmitting coil to receiving head 20 mm (Optional35mm), Powering transmitting side : Inductive, Auto-Zero adjustment, Gain: 250-500-1000-2000-4000-8000, No influence through radio frequency, Digital transmission via magnetic field.
TEL1-PCM-HS-BATT
Digital High Speed (50kHz)Telemetry System for Strain Gage or ICP Applications on Rotating Shafts
“Controlled Gain and AZ at receiver side”
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Easy to assemble and operate!!
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Full- and half bridge configuration!
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Auto-Zero adjustment!
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External shunt calibration!
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Digital transmission via magnetic field !
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No influence through radio frequency!
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Signal bandwidth 0…50000Hz (-3dB)!
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System accuracy +/-0.2%! |
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Strain gage sensors >350 Ohm
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Excitation fixed 4 Volt DC
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Gain: 250-500-1000-2000-4000-8000
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ICP Version, ICP current 4mA
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Distance up to 50mm
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Many systems can operated at same time
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Output +/-10V and digital for interface
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General Description
The TEL1-PCM-HS-BATT single-channel high speed telemetry system offers the easiest handling for the wireless transmission of strain gage signals from rotating shafts. The encoder 62x27x13mm with a weight of 30g. The transmitter (encoder) part is simply mounted on the rotating shaft with a special fiber reinforced tape. Powering of the transmission part is via battery 6-9V and the digital data transfer between transmitter and receiver is realized inductively.
Functional Description
The TEL1-PCM-HS-BATT transmitter provides a pulse code modulated signal (PCM) to an induction winding around the shaft (max. diameter 500mm, other on request!). 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 50mm. The receiver unit offers a BNC connector at the front panel with analog outputs 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 neg. 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. A continued flashing of the yellow LED indicates some error in the AZ electronics. In this case please contact the support of KMT. 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.
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TEL1-PCM-HS-STG - "Transmitting part"
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TEL1-PCM-HS-DEC - "Receiver and Decoder"
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