Installation And Runtime Parameters; Installation Parameters; Adjustment And Synchronization; To Check The Water Level Setting - Kongsberg EM 1002 Operator's Manual

2.5

Installation and runtime parameters

850-160977/E
This section discusses parameters that may need changes from
survey to survey. It is recommended that the installation
parameters are always checked. A list of these parameters and
settings should be kept in a safe and accessible place.

Installation parameters

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A description of how to access installation parameters is on page
24.

Adjustment and synchronization

The system clock can be adjusted to show the same time and date
as an external clock, or the clock from the positioning system. This
is done automatically at the start of the new survey. You can
synchronize the internal system clock with a one pulse per second
(1PPS) signal, normally available from a GPS receiver. This
eliminates any drift of the system clock.
®
See Survey Setup on page 15.
You may - before the survey is identified in the Survey Setup
dialogue box - select the source for the clock adjustment.
1 Locate the Clock field in the installation menu, and select
synchronization from any of these sources:
· External clock
· Operator Station (for manual setting)
· Active Pos. System
2 Select clock offset if required.
3 Press 1 pps Sync to switch on the 1 pulse per second external
clock synchronization.
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The Clock field on the Installation Menu and the parameters used
are described in detail on page 135.

To check the water level setting

In order to measure the exact depth, the system must know how
deep the transducer array is installed. This is calculated by the
system using the vertical locaton of the waterline and transducer
in the vessel coordinate system. The latter is fixed at installation.,
while the waterline changes.
The water line value may vary depending on vessel type, fuel
consumption and other factors caused by the ship design and
handling. Recalculate and modify the value as often as required.
Operational procedures
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