4
INTENDED USE AND GENERAL
OVERVIEW
The YSI DO200A and YSI DO200M are precise water quality instruments
that measure dissolved oxygen (DO) in addition to temperature. A built-
in microprocessor stores, calculates, and compensates for all parameters
related to DO determinations including DO electrode temperature
characteristics.
The DO200A and DO200M have a waterproof IP67 case when the
connector cap is installed. The keys are highly reliable with tactile and
audio feedback. These instruments use one 9V battery. Recalibration is
not required when power is restored.
The front of the instrument has a large LCD that displays temperature and
either DO % or DO mg/L (ppm). The instrument also displays user prompts
and mode indicators. The unit prompts the user through calibration and
measurement procedures.
The model DO200A/DO200M field and lab probes use a polarographic
electrode with convenient screw-on cap membranes. Field probes feature
a built-in temperature probe for automatic temperature compensation, as
well as a stainless steel body for added weight. The self stirring 200-BOD
lab probe (item # 609200) is also available.
Key differences between the YSI DO200A and DO200M include:
• DO200A can store 50 data sets, while the DO200M can store 250 data
sets.
• A real-time clock is included on the DO200M for date/time stamp of
saved data.
• The DO200M features a waterproof USB port with cover that will allow
customers to download stored measurement data to a PC.
• A recal prompt on the DO200M allows users to select a recalibration
interval.
606035REF-B-YSI-DO200A-DO200M-User-Manual-English.indd 4 12/7/2017 9:45:08 AM
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