21
Taking measurements with READY indicator selected on
If the READY indicator has been activated, the READY annunciator lights when
the reading is stable. Switch the READY indicator on or off in the SETUP program
P5.1 for % saturation measurements (page 43) or program P4.1 (page 51) for mg/l
(ppm) measurements.
Taking measurements with the auto endpoint feature selected on
When a reading is stable for more than 5 seconds, the auto endpoint feature will
automatically “hold” the reading. The “hold” indicator appears on the left side of
the display. Press the HOLD key to release the reading. Switch the Auto endpoint
feature on or off in the SETUP program P5.1 for % saturation measurements (page
43) or program P4.1 (page 51) for mg/l (ppm) measurements.
Taking pressure/salinity compensated DO measurements
If necessary, you can adjust the pressure and salinity values of your measurements
in the SETUP mode. The DO meter will automatically compensate for salinity and
pressure based on the values entered in the setup functions. The meter is factory set
at 760 mm Hg (101.3 Pascals) pressure adjustment and a factor of 0.0 salinity adjust-
ment. See Appendix 2 on page 64 for a “Pressure vs Altitude” table.
Pressure adjustment
NOTE: This adjustment appears in both
the % saturation and mg/l (ppm)
measurement modes.
1.
Press the MODE key
to select % satura-
tion or mg/l (ppm) mode. Press the
SETUP key
to enter Set Up mode.
See figure
2.
Press the ENTER key
until the upper
display shows a number and the lower
display shows “Hg” or “PA”.
3.
Use the
▲
and
▼
keys
to enter the
barometric pressure. The upper display
will show the value you have entered.
See figure
4.
Press ENTER
to confirm pressure value.
5.
Press CAL/MEAS to return to measure-
ment mode, or continue with step 4 on
page 22 to make a salinity adjustment
[available from mg/l (ppm) mode only].
5.2
A
B
A
B