OTT Hydrolab DS5, User Manual

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Deployment
5.2.3 Short-term Deployment in Open Waters
Generally, short-term deployment implies hand-held operation.
Important Note: Do not pull Sonde from a moving boat or instrument damage may occur
and voids the instrument warranty.
•
Do not lower the mulitprobe into the water without screwing on the weighted
sensor guard.
•
Secure the underwater cable prior to deployment.
•
Do not place the instrument where the cable might be severed or damage by boat
propellers or any moving parts on a monitoring system.
•
Protect all cables from abrasion, unnecessary tension, repetitive flexure, or bending
over sharp radii (boat gunwale or a bridge railing).
•
Do not bend or run the cable over the sheave or pulleys with less than 3-inch radius or
6 inches in diameter.
•
Use the V-shaped support bail to lift and lower the multiprobe, if so equipped.
This ensures that the weight of the mulitprobe is suspended from the bail. If the
multiprobe is equipped with a locking sleeve instead of a support bail, make sure the
locking sleeve or the MSS mooring fixture are properly screwed on the multiprobe
6-pin marine bulkhead connector before deployment.
•
Extra weight, up to 5 kg (10 lb) maximum, can be attached to the Sonde ( Figure 11 ).
If more weight is needed, use a wire line to support the instrument by its bail,
if so equipped.
•
Use a battery-powered or hand-cranked reel with electrical slip-rings to lower and
raise the instrument, if the cables are very long. A lighter reel without slip-rings for
shorter cables can also be used (
Figure 12 ).
•
If sufficient deck space permits, mount the reel horizontally with the instrument and a
battery installed in the hub (
Figure 12 ). The manufacturer’s cable reel can also be
used to store up to 150 m (490 ft) of underwater cable (the reel must be ordered with
the initial underwater cable purchase.
•
In deep deployments currents, in conjunction with the sensor guard, can put extreme
strains on the cabling.
Figure 11 Using the Weighted Sensor Guard
1.
DS5 Sensor Guard
3.
MS5 Sensor Guard
2.
DS5
4.
MS5
1
3
2
4