Apex Classic Setup and Programming Guide v2.2
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DISSOLVED OXYGEN RANGE
The PM3 supports 2 dissolved ranges as described in the table below:
Range
Units
Description
SAT
0 to 200% Percent of dissolved oxygen in the
water column. 100% indicates a
saturated DO level.
PPM
0.0 to
20.0 ppm
The parts/million of oxygen in the
water column.
Table 3 - Dissolved Oxygen Range Options
NOTE: If the dissolved oxygen range is changed, don’t forget to update outlet
programs that are based on the dissolved oxygen reading as the values will
change with the change in range.
To set the Dissolved Oxygen range:
Apex Display: Setup – DO Setup – DO Range – use the up/down arrow
keys to choose the range, press OK when done or Exit to discard changes.
Web Interface: This option is not available from the Web Interface.
DISSOLVED OXYGEN CALIBRATION
NOTE: Set the Dissolved Oxygen Range, system Altitude and Salinity before
calibrating the Dissolved Oxygen probe. See the previous section for instructions
on setting these parameters.
To calibrate a Dissolved Oxygen probe:
Apex Display: Setup – DO Setup – DO Calibrate –
1.
If you have more than one Dissolved Oxygen probe enabled on your
system, use the up/down arrow keys to choose the probe you wish to
calibrate, press Select.
2.
Plug the Dissolved Oxygen Zero adapter into the DO port on the PM3.
Wait for the numbers on the bottom of the LCD screen to stop
changing. It does not matter what value is displayed only that it is
not changing. When the display stops changing press the select
button.
3.
Unplug the DO Zero Adapter and plug in the DO probe into the DO
port on the PM3. Take the DO probe out of water and dry the
