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Multiplexer
OPCOM-02
(35, 32, 19, 16, 8
or 4 channel)
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OPCOM-02 is particularly well
suited for ultrasonic measurements as well as other kinds of
measurements which need many channels. Together with the card
OPCARD and ultrasonic probes it could be used as complete
ultrasonic testing device. Each channel has separate pulser &
receiver.
Housing: Lohmeier KL - 08 series
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| Technical
data - Short specification |
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Power supply: |
12V DC
/ 1A or directly from OPCARD |
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Channels: |
35,
32, 19, 16, 8 or 4 channel (sender/ receiver) |
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Pulse amplitude range: |
0 (off)
- 360V |
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Pulse length: |
form 1
to 8 us |
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Receiver bandwidth (3dB): |
0.5 -
20MHz |
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Receiver amplification: |
20dB 1 |
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Pulse Voltage Control |
External
analog voltage DC range 0-10V or RS232 |
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Digital Input |
1 (TTL
Signal) |
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Digital Output |
3 x
Relay (0 or 12VDC)1
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Analog Output Voltage1 |
from 0
to 10V (controlled via RS232 with 1023 steps)
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| - Max cable
length between computer and the box: |
30m |
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1
- option |
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Features and
Specifications |
Multiplexer can be
configured in following ways:
sequentially - sending and receiving channel sequence is stored
and each following channel switched with TTL Trigger
each channel can be used separately as sender or receiver
Pulser circuit
waveforms: The rising edge of the Trig signal initiates the
transducer charging process which takes from 1us to 8us depended
on settings. After this time a transistor switch which discharges
the transducer is turned on (discharge time is about 20ns, but it
can be longer, if the capacitance of the transducer is to large;
the limit is reached, if the transducer is made from the standard
ceramics, is 0.1 mm thick and has 8 mm diameter). Because of the
very low output impedance of the device (<1 Ohm) and short
discharge time the pulse generated with this device could be
concerned as a real pulse answer for the most transducers
Pulse voltage can be controlled in two ways: using analogue input
Vreg (DB15) or serial interface (DB9). After switching the power
on, default is analogue control (0-12V). Using serial interface
the control can be switched to it.
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Comunication |
The multiplexer is
controlled via serial interface RS232 (DB9).
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