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Digital one channel "HIGH SPEED" 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
Digital High Speed 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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Strain gage
sensors >350 Ohm
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Full- and half
bridge configuration
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Excitation fixed
4 Volt DC
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Auto-Zero
adjustment
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Gain: 250-500-1000-2000-4000-8000
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External shunt
calibration |
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ICP
Version, ICP current 4mA
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Digital
transmission via magnetic field
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Distance up to
20mm, Optional 40mm
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No influence
through radio frequency
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Many systems can
operated at same time
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Signal bandwidth
0…50000Hz (-3dB)
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Output +/-10V and
digital for interface
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System accuracy
+/-0.2% |
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General Description
The TEL1-PCM-HS 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 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 20mm. (with standard head) 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"
Front Side
Rear Side |
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