YSI Pro20 - Manual (Page 18)

AUTO STABLE
Auto Stable utilizes preset values to indicate when a reading is stable. The preset
values are adjustable in the System Setup menu. The user can input a % change in
dissolved oxygen readings (0.0 to 1.9) over ‘x’ amount of time in seconds (3-19).
Highlight Auto Stable and press enter to expand the submenu. Use the up or
down arrow keys to highlight the DO% Change or seconds (secs) input field, then
press enter to make the highlighted field adjustable. Use the up and down arrow
keys to adjust the selected value, then press enter to confirm changes. Once you
have confirmed any changes, highlight the ESC-Exit box and press enter to close
the Auto Stable submenu.
To disable Auto Stable, set the DO% Change input to 0.0.
When Auto Stable is enabled, a will display next to the dissolved oxygen
value on the run screen and blink during stabilization. When the dissolved oxygen
value has stabilized based on the Auto Stable settings, the will display steadily
and the instrument will beep twice if Audio is turned on.
DO UNITS
Highlight DO Units and press enter to open a submenu that will allow you to
select the dissolved oxygen units displayed on the run screen. Highlight the
desired unit(s) and press enter to enable or disable. An enabled dissolved oxygen
unit will have an ‘X’ in the box next to it. Highlight the ESC-Exit box and press
enter to save any changes and to close the DO units submenu.
There are three options for displaying dissolved oxygen:
„
mg/L will show DO readings in milligrams per liter on a scale
from 0 to 50 mg/L.
„
ppm (parts per million) is equivalent to mg/L and will show the
DO reading on a scale from 0 to 50 ppm.
„
% will show DO readings in a percent scale from 0 to 500%.
This value will be expressed %L when DO Local% is enabled.
Both % or %L and mg/L or ppm can be displayed simultaneously on the screen.
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