green Pocket-sized PH Meter

green Pocket-sized PH MeterOPERATION MANUAL * Range: 0 to 14.00 pH* Resolution:0.1PH* Water proof and protection* Accuracy(@20°C/68°F):±0.1 pH * Easy to change the pH electrode* Typical EMC Deviation:±0.1 pH *Calibration: Manual, 1 point * Temperature Compensation Automatic:0 to 50°C* Environment:0 to 50°C (32 to 122°F); * RH max 95% * Battery Type:4 x 1.5V alkaline ,Battery Life :approx. 200 hours of use *Dimensions:152 x 30 x 21 mm (5.9 x 1.2 x 0.8") *Microcomputer circuit, intelligent function, high accuracy* Compact size, light weight*Available for wide applications, such as aquarium, beverage, fish hatcheries, food processing, photography, laboratory, quality control, school & colleges, swimming pools, water conditions OPERATION 1 Remove the protective cap. Do not be alarmed if white crystals appear around the cap. This is normal with pH electrodes and they dissolve when rinsed with water. 2 Turn the meter on sliding the switch on the top. 3 Immerse into solution up to the max immersion level. 4 Stir gently and wait until the display stabilizes. Readings are automatically compensated for temperature variations. 5 After use, switch off pH meter, use the water clean the electrode and replace the protective cap. DO NOT USE DISTILLED OR DEIONIZED WATER FOR STORAGE PURPOSES. • Large fluctuations in readings could be due to lack of calibration, dry electrode or rundown batteries. CALIBRATION • Immerse the tester up to the maximum immersion level in pH 6.86 buffer solution • Allow the reading to stabilize and using a small screwdriver adjust the calibration trimmer to read 6.9.