5
5.3 Changing Display Units
Pressing both buttons (
POWER
&
ZERO
) at the same time while
the meter is on will change the displayed units. This change will
be saved when the meter is turned off.
5.4 Taking a Reading
Power on the meter by pressing
the
POWER
button. Zero the
meter if necessary with the
ZERO
button. Slowly press the
meter into the soil with a firm and
steady pressure. Do not stop or
reverse force on the meter until
the desired depth has been
reached. Keeping the meter
vertical during the entire
penetration sequence assures
readings are true cone pressures
and not a result of side loading
on the shaft.
Penetration Rate:
ASABE
Engineering Practice EP542 recommends a Penetration Rate of
1.2 in./second (30mm/sec)
for best accuracy.
Maximum Reading Display:
The maximum compaction
reading attained during the penetration will automatically display
as the probe is withdrawn from the soil. The display will show “
-
HI-
“ followed by the maximum compaction reading. This reading
will show for a few seconds before the meter reverts back to its
normal operation mode.
Over Force:
If excessive force is applied to the meter the
display will flash “
9999
” until the force is reduced below the
meter’s upper limit.
Note:
Meter will automatically shut off after 15 minutes of non-use
if not turned off by the user to conserve battery power.
Display Shows -HI-
Then Max Compaction
