Extech Instruments PH300 Users Manual
Digital pH Meter
Model pH300
User's Guide
Introduction
Congratulations on your purchase of the Extech pH meter. For best results, please read the entire
manual before use.
The pH300 meter measures pH, mV, and temperature parameters. The built-in microprocessor
provides automatic calibration, automatic temperature compensation, data storage, and selfdiagnostics. The meter can recognize up to 13 types of pH standard buffer solutions.
The meter’s digital filter improves measurement speed and accuracy.
Two special modes (ammonia and purified water) are provided.
The meter offers a backlit LCD display and is dust-proof and water-proof, meeting the IP57 rating
This meter is shipped fully tested and calibrated and, with proper use, will provide years of reliable
service.
Supplied Equipment List
pH300 Meter
pH / ATC (Automatic Temperature Compensation) Electrode
Standard buffer solutions (4.00pH, 7.00pH, and 10.01pH) / 50ml
Screwdriver (for removing battery compartment)
Batteries (2 x ’AA’ 1.5V)
User’s Guide
Carrying Case
You, as the end user, are legally bound (EU Battery ordinance) to return all used
batteries, disposal in the household garbage is prohibited! You can hand over your
used batteries / accumulators at collection points in your community or wherever batteries
/ accumulators are sold!
Disposal: Follow the valid legal stipulations in respect of the disposal of the device at the
end of its lifecycle
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Meter Description
1. LCD Display (detailed in section below)
2. Rubber protective jacket (remove to access the rear battery compartment)
3. Keypad (detailed in section below)
4. Electrode connection jack
5. Electrode plug
6. Electrode measuring bulb
7. Electrode body
8. Electrode cable
Display Description
1. Parameter Mode icon
2. Measurement reading
3. 888 (Stored data serial number), M+ (measurement to be stored icon), RM (reading to be
recalled icon)
4. Unit of measure
5. Temperature reading
6. Stable measurement icon
7. Calibration icons
8. Low battery icon
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PH300-en-GB_ V1.4 12/14
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