Digital Portable PH Meter

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Hangzhou Lohand Biological Technology Co.,Ltd

Zhejiang, China

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PH-220 pen-type PH meter, for on-site or field operations designed to simultaneously display PH and temperature values of the portable pen-precision instruments.

Operations Guide

Remove the front (1) PH meter below the electrode protective cap, the PH composite electrode stir in purified or distilled water, followed by sufficient washing drying, press ON / OFF the power, and the PH composite electrode is immersed in the test solution, after slightly shaking still, until a stable reading digital PH, PH value is the measured solution.

(2) PH timepiece factory default temperature unit is ℃, temperature units for conversion, proceed as follows: at PH meter off, hold CAL hold, then press ON / OFF power on the right side of the display appears to be: when "℃" or "F", release the CAL; press CAL to select "F" or "℃"; press HOLD after storage selected; the display will show "SA" symbol indicates that the unit has been selected temperature saved, the instrument automatically enter the normal measurement mode.

(3) Instrument calibration: prepare standard buffer 6.86PH, according to the ON / OFF power, the PH composite electrode into standard buffer configured appropriately after shaking still, until PH digital stable, press CAL for about 3 seconds, CAL symbol is displayed, then release the CAL, PH meter will automatically recognize the standard buffer value at the current temperature, appears for about one second the current measured value, standard buffer value and then display the current temperature display "SA" sign after two seconds, he said it was the memory calibration results and then displays "END" symbol indicates calibration has been completed, one second after the return to normal measurement. If you pressed CAL, a second after displaying the "END" symbol, indicating that the standard buffer or electrode failure is aging, press any key to exit and restore measurement mode. Please confirm whether standard electrodes buffer or normal. Calibration 4.01pH, 9.18pH buffer, as above.

When the PH meter calibration does not show an "END" sign, do not count out from the PH standard buffer. PH meter with a time calibration standard buffer and the correct method of operation, improper calibration will increase measurement error! In non-standard calibration status, do not press CAL may cause erroneous instrument calibration, the instrument can not work, or lead to measurement errors far exceeded normal.

(4) instrument Press ON / OFF the power, when the instrument is in measurement mode, press HOLD to lock the current data on the display, and there will be a "HOLD" symbol on the display, press HOLD unlock mode.

(5) over range display, when the PH value is less than "0", above the "14" or "not in a measuring electrode solution" when, PH display will show

                                                            model
                                                            PH-220
                                                        
                                                            size
                                                            Φ40*185mm
                                                        
                                                            weight
                                                            88g
                                                        
                                                            Measuring range
                                                            PH：0.01-14.0PH；temperature：0-50℃；  32-122F
                                                        
                                                            Resolution
                                                            PH：0.01PH；temperature：0.1℃ 1F
                                                        
                                                            Accuracy
                                                            PH：±0.01PH；temperature：1℃/2F
                                                        
                                                            PH Calibration
                                                            PH:25℃；Three-point calibration； 4.0  6.9  9.2
                                                        
                                                            Operating temperature
                                                            0-50℃（32-122F）
                                                        
                                                            power supply
                                                            1.5V battery*4PCS

The instrument is suitable for tap water monitoring, aquaculture, environmental protection, printing and dyeing, electroplating, the beverage industry, and research institutes' Determination of water PH value.