(35, 32, 19, 16, 8 or 4 channel)
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

Technical data - Short specification

- Power supply: 12V DC / 1A or directly from OPCARD
- Channels: 35, 32, 19, 16, 8 or 4 channel (sender/ receiver)
- Pulse amplitude range: 0 (off) - 360V
- Pulse length: form 1 to 8 μs
- Receiver bandwidth (3dB): 0.5 - 20MHz
- Receiver amplification: 20dB 1
- Pulse Voltage Control External analog voltage DC range 0-10V or RS232
- Digital Input 1 (TTL Signal)
- Digital Output 3 x Relay (0 or 12VDC)1
- Analog Output Voltage1 from 0 to 10V (controlled via RS232 with 1023 steps)
- Max cable length between computer and the box: 30m

1 - option

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 1μs to 8μs 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 (<1Ω) 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.


The multiplexer is controlled via serial interface RS232 (DB9).