HYDROLAB HL4 Manuel D'utilisation page 12

5. When configuration is completed, disconnect the communications cable from the PC.
a. Select File>Disconnect from Device to disconnect the communications cable from the PC.
Note: As an alternative, click Devices, select the communications cable, then click Disconnect.
b. Disconnect the communications cable from the PC.
Connect the communications module
Items to collect:
• Data acquisition system or controller
• Communications module (configured)
• External power source, 6-24 VDC (12 VDC nominal)
1. In the field, connect the communications module to the data acquisition system or controller.
Refer to the documentation supplied with the communications module for wiring information.
Refer to Data transmission and power wiring
transmission.
2. If the data acquisition system or controller cannot supply power to the communications module,
connect an external power source to the communications module. Refer to
power wiring on page 12 for the wiring requirements for external power.
Data transmission and power wiring
To connect data transmission lines to the communications module, make sure that the transmission
cable is sufficient for the operating current and will transfer the data without distortion. For up to
305 m (1000 ft) of cable, three 26 AWG wires are sufficient.
To connect external power to the communications module, make sure to use two 18 AWG wires for
power. Smaller power wires can be used if the power supply is near the instrument.
Instrument deployment
Items to collect:
• Deployment cable
• Sensor guard
1. Connect the deployment cable to the communications module. Make sure to use the deployment
cable and not the calibration cable.
2. Connect the deployment cable to the instrument.
3. Remove the storage/calibration cup and install the sensor guard. Keep the storage/calibration cup
for later use. Refer to
4. Lower the instrument into the water to be measured. For the best results, make sure that all of the
instrument is in the water. Do not put the communications module in the water.
5. Attach the instrument and cabling to a structure. Refer to
on page 12.
When deployment is complete, prepare the instrument for travel. Refer to
travel on page 16.
Attach to a buoy, anchor or structure
Do not use pipe clamps to attach the instrument because instrument damage can occur.
For unattended monitoring, attach the instrument to a buoy, anchor or structure.
****
Optional for instruments with an internal battery pack. Not used when the data acquisition
system or the controller can supply power to the communications module.
12 English
Figure 6 on page 10. Do not let the sensors become dry.
N O T I C E
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on page 12 for the wiring requirements for data
Attach to a buoy, anchor or structure
Data transmission and
Prepare for storage or