tester pH-009

testing of drinking water
This device is designed to measure the acidity of water or other solutions

Operation:

- remove the protective cap
- first rinse the electrode with distilled water, and suck it with filter-paper
- turn on pH by "ON-OFF" switch located on the top of battery case
- immerse the pH meter electrode in the solution to be tested
- sir gently and wait for the reading to stabilize
- after use, switch OFF pH, Use the distilled water clean the electrode and replace the protective cap

pH calibration:

- immerse the electrode in pH 6.86 standard buffer solution  of phosphate, and gently shake the electrode
- regulate the trimmer with a screwdriver until the buffer solution value corresponding to the measurement temperature is obtained
- immerse the electrode in pH 4.01 or pH 9.18 the standard buffer solution  of borax

- after about one minute, repeat the screwdriver adjustment procedure

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Important:
The instrument's pH range must be re-calibrated whenever.

Specifications

Range: 0.0-14.0 pH
Resolution: 0.1 pH
Accuracy: +-0.2 pH (+-0.1pH at +20C/68F)
Batteries: 3*1.5V (AG-13 Button Battery)
Life: ~700 hours of use
Environment: 0-50C/32-122F, humidity <95%
Trimming: by potentiometer
dimensions: 150x29x20mm, weight: 51g


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