9
After selecting a language, sensor, and membrane, the run screen will
appear. The next time the instrument is powered up the run screen
will appear immediately after the self check. If the sensor type or
membrane type is changed, ensure that it updated in the System Setup
menu.
S Y S T E M S E T U P M E N U
Press the menu
key to access the System Setup menu. The System
Setup menu contains three screens notated as ‘pages’. The current
page is indicated near the bottom of the display (figure 9).
DO LOCAL%
DO Local%
can be enabled or disabled by using the up or down arrow
keys to highlight it and then pressing enter
. An ‘X’ in the box next to
DO Local% indicates it is enabled (Figure 9).
Figure 9, DO Local% is enabled.
When DO Local% is enabled, DO% values will be expressed as %L on
the Run screen.
DO Local% allows for localized % saturation measurements, but does
not affect the mg/L readings. When enabled, the DO%L calibration
value is always 100% regardless of the altitude or barometric
pressure of the location. This deviates from YSI’s traditional method of
expressing DO% saturation where the % calibration value decreases
with a decrease in barometric pressure, i.e. an increase in altitude (See
appendix A). To determine the % calibration value when DO Local% is
disabled, divide the local, true barometric pressure in mmHg by 760
and then multiply by 100.
