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Digital one channel radio telemetry system for strain gage applications on rotating shafts, “Controlled Gain and AZ at receiver side” Signal bandwidth up to 500Hz, Distance <-> transmitting to receiving antenna 1-10 meter, Powering transmitting side: 6-9V Litium battery
MT1-PCM
Digital Radio
Telemetry System for Strain Gage
Applications on Rotating Shafts
“Gain and Auto Zero setting direct from Receiver Side!”
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Easy to
assemble and operate |
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Digital transmission via radio
telemetry 433MHz |
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Strain gage sensors (>350 Ohm) |
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Powering through Lithium battery,
>15h work time |
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Full- and half bridge
configuration |
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Distance 1-10 meter (rotating
application) |
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Excitation fixed 4 Volt DC |
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Up to 4 system can work in
different radio freq. |
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Auto-Zero adjustment - Setting
receiver side |
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Signal bandwidth 0…500Hz (-3dB) |
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Gain: 250-8000 - Setting receiver
side |
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Output +/-10V |
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External shunt calibration |
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System accuracy <0.2% |
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General Description
The MT1-PCM single-channel telemetry system
offers the easiest handling for the wireless radio transmission of strain
gage signals from rotating shafts.
The encoder has dimensions (MT1-PCM-STG) of 62x27x13mm (without connectors)
and transmitter (40k-Tx) of 62x27x11mm (without connectors). Each module
have a weight of about 30g. The encoder/transmitter parts are simply mounted
on the rotating shaft with a special fiber reinforced tape and add steel
trip.
Powering of the transmission part is with battery 6-9V, power consumption
70mA. The digital data transfer between transmitter and receiver is realized
by radio frequency 433MHz or 868MHz, transmitting power 10mW
Functional Description
The MT1-PCM transmitter
transmits a digital radio frequency signal to the receiver. The distance
between transmitter and receiver (depends of application) is 1-10 meter.
"Not rotating Point to Point application upto100m at free view"
The receiver unit offers a BNC connector at the
front panel with analog outputs ± 10 V. 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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SET:
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MT1-PCM-STG "Encoder/
Transmitter with cable antenna"
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MT1-PCM-DEC - "Receiver / Decoder"
Front
Rear |
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