30
GALILEO 2 TEK (G2TEK) USER MANUAL
2 .3 .5
Low HR alarm
The G2TEK can trigger an alarm if your
heart rate drops below a set level. The
alarm can be set between 35 and 100
beats per minute.
2 .3 .6
Setting the ascent speed
alarm
The G2TEK can trigger an alarm if you
exceed the preset ascent speed. You can
select the value from 0.1-5.0m/1-15ft per
second.
2 .3 .7
Water density
There is a direct relationship between the
weight of a water column and the pressure
it exerts, and the weight is given by the
depth multiplied by the density of the water.
Hence, the depth displayed by a dive
computer is obtained by a measurement of
absolute pressure.
Water density, however, is a function of
salinity, so the same depth in a lake (fresh
water) and in an ocean (salt water) will yield
a different pressure measurement.
The difference is very small, with a
corresponding error in displayed depth
(approximately 3%). For this reason, in
Scuba and Gauge
modes the G2TEK
allows you to define whether you’re diving
in fresh or salt water.
A decompression calculation is based on
absolute pressure, so setting the G2TEK
to fresh water when diving in salt water,
or vice versa, is acceptable. However,
the depth measurement will be slightly off
(approximately 1m/3ft every 40m/130ft),
although the decompression calculation
will be carried out correctly.
