Adjusting The Altitude - Hach sension8 Manual

SECTION 3,
continued

3.1.6 Adjusting the Altitude

Note: If an altitude value
other then zero is entered
in this setup, the meter will
automatically convert the
barometric pressure entry
in setup 5 to a true
pressure value based upon
the two entries. Using true
pressure in conjunction
with an altitude other then
zero may result in a large
error in the displayed
% saturation.
2. Press the
UP ARROW
upper right hand corner of the display. The current barometric
pressure will be displayed.
3. To change the value press the
icon will appear in the lower display.
4. Use the number keys to enter the barometric pressure. Press
the key to leave the value unchanged. Press the
EXIT
key when the desired barometric pressure has been entered.
5. Press the key. The meter will return to the Read Mode.
EXIT
The displayed dissolved oxygen in % saturation will be
adjusted according to this entry.
Changes to the Altitude Adjustment feature alter displayed
dissolved oxygen in the % saturation mode. These changes do
not calibrate the Dissolved Oxygen meter or change the
displayed dissolved oxygen concentration when reading in mg/L.
The Altitude Adjustment setup feature can be used alone or in
conjunction with the Barometric Pressure feature. The altitude
entry must be correctly combined with the barometric pressure
setup for the displayed % saturation to be accurate.
If the Barometric Pressure used in setup 5 is the true pressure for
the meter location instead of the sea level equivalent, the Altitude
entry in this setup must be 0 meters (0 feet).
If the current barometric pressure is not known, the meter can
display % saturation based upon altitude. When the barometric
pressure is not known, the altitude should be used in conjunction
with a normal Barometric Pressure of 760 mm Hg. To use altitude
to calculate % saturation:
1. Enter a barometric pressure of 760 mm Hg (29.92 inches Hg)
as described in Section 3.1.5 Changing the Barometric
Pressure.
2. Enter the altitude of the meter (see below). Update the
altitude entry in this setup as the elevation of the
meter changes.
26
four times. A will begin flashing in the
5
key. The number pad
ENTER
ENTER