Installation manualfor Hydrophone

Ver. 3.0July, 2016

Hydrotech Corporation1．Pipe Hydrophone

45

2

163

1. pipe (2 m, 1m, 0.5m)
2. Saddle
3. Socket parts
4. Preamplifier
5. Microphone
6. Cable ( standard length : 30m)

1

Prepare for installation
1. A ditch should be dug for hydrophone. Depth is 22.5cm.
2. Saddle is fixed with anchor.

pipesaddle

pipe

2-2.5cm2

Saddle position123

1. Socket part should be fixed by two saddle. However
saddle is tight to the pipe of hydrophone, saddle
should be fixed.
2. For 2m and 1m pipe length version, a saddle is fixed at
the center of hydrophone pipe depending on site
situation. For 0.5m pipe length, you should not use asaddle at the center of hydrophone pipe.
3. To fix the hydrophone pipe tenaciously, two saddle
should be used at the end of pipe.

3Construction
1. Hydrophone pipe is covered with concrete. 5cm roundof pipe should not be covered.
2. The each end of pipe (red circle on picture) including asaddle should be covered with concrete.
5cm roundpipeconcrete

1/3 f
1/3 f

4

2. Plate Hydrophone

The concrete of river
bed is removed at thesize of the hydrophone.
The body ofhydrophone should befixed with four anchors.

The plate face of the hydrophone and the faceof river bed should be installed at
approximately the same height.

Hard concrete should be filled a gap between thehydrophone and the concrete of the river bed.
5

The cable connection of the plate hydrophone

Connection of the signal cable

The vibration sensor is an option.
Vibration converter
The power cablefrom the datalogger

OutputThe signal cablefrom the plate hydrophone
6E. Cable connection
Sensor & converter conection

After tightening up a connector, it rolls up a masking tape.

System connection
Analog output C &D

power

SDM-INT8 6 CR1000
connection

Converter

Pulse output (to SDM-INT8 ,CR1000)

7Converter connection
HT-HP5 converter

GraundSW12V (CR1000)
G (CR1000)

sensor

If you think that the noise is big level ,you should test the short circuit of 0 V and FG.
sensor cable
FG : shieldpower +5V : red
Power 0V : green
power -5V : black
intput : white
input +: yellow8Converter HT-HP5

SDM-INT8

CR1000

When using C7&C89

cable connection
Converter0Vba0Vcd1024
512
2561286432168420V

CR1000SDM-INT8It uses when recording the wave of the sound.
It is necessary about 50kHz sampling frequency.
DIFF 1L , 2L
DIFF 1H
DIFF 2H
CH1
CH2
CH3
CH4
CH5CH6CH7CH8
P1 or C7 (It adjusts with the program)P2 or C8 (It adjusts with the program)G
SDM 12VSDM G
SDM C1
SDM C2
SDM C312V
GC1C2C310

The explanation of the output0Vba0Vcd1024
51225612864321684
20V

signal graundafter passing a band path filter (10times of gain)
preamplifier output
signal graundsound pressure output (same as HP4)
sound pressure output (add in HP5)
*It emphasizes a big signal*The signal of the long mean time
pulse output of *1024ch (same as HP4)*512ch (add in HP5)*256ch (same as HP4)*128ch (add in HP5)*64ch (same as HP4)*32ch (add in HP5)*16ch (same as HP4)*8ch (add in HP5)*4ch (same as HP4)*2ch (same as HP4)signal graund

Pulse output
The big magnification ch is higher sensitivity.
Then, it measures the hit of the smaller sediment.
11

The data sample

hp_Tot(1) 1024 times ch pulse count
hp_Tot(2) 512 times ch pulse count
hp_Tot(3) 256 times ch pulse count
hp_Tot(4) 128 times ch pulse count
hp_Tot(5)64 times ch pulse count
hp_Tot(6)32 times ch pulse count
hp_Tot(7)16 times ch pulse count
hp_Tot(8)8 times ch pulse count
hp_Tot(9)4 times ch pulse count
hp_Tot(10)2 times ch pulse countout_c_Avg
averages for 1 minute of out_c
out_d_Avg
averages for 1 minute of out_d12

sample of the wave output

out_aout_b
out_c
out_d13