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It is strongly recommended that the full calibration process is followed as described
above. However, alternative methods are possible:
• One-way trips: if it is certain that there is no effect on water speed from wind
or tide, you can use the results from one direction only:
o At the end of the first run (A to B) touch the end run
button as usual, and then use the Calibration
Trip Use button to use the data from the run so far.
o The Start button will now be flashing, waiting for you to do the return (B
to A) trip. You can clear this flashing as follows: touch it, to start a
“dummy” trip, then touch the End button, and select “Cancel” from
the “Set results in calibration table?” prompt.
• Use GPS speed data; this is ground speed, so only matches the true water
speed if there is no tidal current. But if this is the case, then you could create
a column in the Calibration table as follows:
o Touch the Ref. field and use the keypad to enter the GPS speed that is
shown in the top-left of the window
o Touch the Log field and enter the raw value from the speed log: this is
shown to the left of the Calibration table header.
o Enter zero (or a true value if known) into the Drift field. Blanks in any of
the fields cause the column to be ignored in the calibration
calculations.
4 Maintenance
EMES60 is very simple and robust, and needs very little regular maintenance.
However, the following instructions should help to keep an EMES60 system
accurate and operational.
4.1 Saving/reading files to/from USB key and software upgrade
Please note that the file upload/download and software upgrade functions are
only available in the admin mode – to prevent unauthorized access to the software
and critical parameters during normal use of equipment.
Data can be transferred to and from the EMES60
HMI units using the USB Key control, for
maintenance and troubleshooting.
Remove the HMI unit from the mounting panel,
and insert a USB key drive into the USB port.
Touch the USB Key button in the Home screen.
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