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I N S T A L L A T I O N
Probe Preparation
The DO probe ships with a dry, protective membrane. To install a new
membrane cap on the probe:
1. Unscrew probe membrane cap and discard.
2. Fill a new cap with Oxygen Probe Solution. Prepare according to
directions on the solution bottle.
3. Thread filled membrane cap onto sensor. The sensor can be placed
in a 100% water-saturated air environment (see Dissolved Oxygen
Calibration section).
4. Allow sufficient warm-up time for initial use (10-15 min). During this
time an “ovEr” message may appear on the display. This is normal.
After the warm up is complete the message will disappear.
Battery Installation
An initial display of “BAT” on the LCD indicates approximately one hour of
battery life for unit operation within specifications. Replace battery when
“BAT” appears on the LCD.
To replace battery, remove the two battery
cover screws and the battery cover and o-ring
(Figure 1). Replace the 9V battery. Replace
the battery cover and o-ring (be sure to align
the o-ring correctly to prevent a bad seal) and
fasten the two battery cover screws for the
splash-resistant feature.
Battery Disposal
This instrument is powered by a 9 volt battery, which the user must remove
and dispose of when the batteries no longer power the instrument.
Disposal requirements vary by country and region, and users are expected
to understand and follow the battery disposal requirements for their
specific locale.
Figure 1
606035REF-B-YSI-DO200A-DO200M-User-Manual-English.indd 3
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