|
Multiplexer OPMUX -02
(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
us |
| - 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 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.
|
|
Comunication |
The multiplexer is
controlled via serial interface RS232 (DB9).
|
