Introduction
Congratulations on your purchase of the Extech DO700 meter. For best results, please read the
entire manual before use. The DO700 measures Dissolved Oxygen (DO), Conductivity, pH, mV,
and temperature parameters. Conductivity measurements also yield TDS (total dissolved solids),
Salinity, and Resistivity readings.
The built-in microprocessor provides automatic calibration, automatic temperature compensation,
data storage, and self-diagnostics. The digital filter improves measurement speed and accuracy.
The meter offers a backlit LCD display and is dust-proof and waterproof, meeting IP57.
This meter is shipped fully tested and calibrated and, with proper use, will provide years of reliable
service.
pH Features
The meter can recognize up to 13 types of pH standard buffer solutions. Two special pH modes
(for distilled water and distilled water mixed with ammonia) are provided. These special modes
offer general slope compensation and non-linearity solution temperature compensation suitable
for the electric power and petrochemical industries.
Conductivity Features
Automatic frequency conversion and voltage regulation increases the Conductivity electrode
range (K = 1 to 10 times). One point Conductivity calibration allows measurements from 0 to
100mS/cm. Up to 8 types of Conductivity standards can be recognized.
The meter has an automatic range feature with non-linear temperature compensation for distilled
water with Conductivity values lower than 10uS/cm greatly improving accuracy and suitable for
the microelectronics and pharmaceutical industries.
Dissolved Oxygen Features
The latest technology DO electrode offers a temperature and salinity sensor with automatic
temperature compensation and automatic salinity compensation as well as manual barometric
pressure compensation.
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