Seacraft ENC II, Quick User Manual

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It is possible to set the calibration factor also without a need to dive and measure a known distance underwater. In case
that logged route indicates deviation of covered distance - and currents presence or wrong mounting/ log damage are
not a reason of that, the correct calibration factor “f” can be calculates using following equation:
𝑓𝑓 =
𝑎𝑎𝑎𝑎
𝑐𝑐
where:
a = length of the section as measured with ENC2
b = current calibration factor (pulses / 100 m)
c = precise known length of the route section
For example: the section being measured has a length of exactly 127 m and ENC has indicated the route length of 124
m. The entered and used in the ENC calibration factor is 1590 pulses / 100 m.
𝑓𝑓 =
124 𝑥𝑥 1590
127
= 1555
After entering the calibration function on the 100 m section, press START and to blow, or use for example a fan until the
number 1555 appears and then press STOP. The correct calibration factor will be saved. The above operation is not
complicated and takes very little time.
This function may be useful if various configurations of speed sensor are used, and you write down also various
calibration factors- corresponding with given set.
Note
The log is a precise and delicate mechanical element and in the case of its significant
contamination, after mechanical impacts or after changing the environment (fresh / sea water) it
is recommended to check its early work and / or recalibration..