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Specification
*measure range:              0.*0pH**4.0 pH
*resolution:                          0.01ph
*accuracy:                        +/-0.01ph
*Power supply:           2*1.5V ( keep using more than **0 hours)
*operating temperature:           0℃*-80℃
*calibration:two points automatic calibration
*dimension: **3mm**9mm**6mm
*weight: *2g
 
Operation
1.remove  the  protective cap.
2.first rinse the electrode with distilled water, and suck it with filter paper.
3.turn the meter on by pressing the ON key.
4.immerse the ph meter electrode in the solution to be tested（can not be over the immersion line )
5.stir gently and waitaround *0 seconds till the reading stabilized.
6.afterfinished ,clear the electrode withpurewater,turn the meteroff by  pressing theON/OFFkey.
7.Always replace the protective cap after use.
 
Calibration.
1. Turn on  pH meter
2.Immersethe electrode inpH 6.*6 standard buffer solution.
   (under the temperature of *5°C)
3. Press the "CAL" .
  Wait until the display digital is 6.*6pH Then complete pH 6.*6 calibration
  Clean the electrode with distilled water and dry it withfilter paper.
4.Immersethe electrode inpH 4.*0standard buffer solution,
  Press "CAL" .
  Wait until the digital is 4.*0 pH..Complete the pH 4.*0 point calibration.
5.Clean electrode and dry it , put pH meter into pH 9.*8 standard buffer solution.
 Check if reading is correct between 9.***9.*9pH.
 
 
Attention
The instrument need recalibrate in the following condition.
1.Long time no use or use very long time after calibration
2.The electrode is used Very frequently.
3. The testing accuracy requirement is very high.
4.Press the "CAL" long time in the air carelessly.
 
pH  electrode  maintenance

If the electrode placed long time, and electrode exposed to air, then showing values is slow and  not stable, because of electrode dry. You should immerse the electrode into water for few hours.
 
LowBatt
When the display value is fuzzy or  unshown , The battery should be replaced  promptly.Pay attention to the polarity of battery.
 
Warranty
The instrument is warranted to the purchaser for a  year from the date of purchase.
If during these periods, repair or replacement of the instrument is required,
please return the instrument to either your dealer or to our office.The repair will be effected free of charge. ( damage is not due to negligence or erroneous operation by the user)
Note :Plese provide purchase invioce or proof before returning your instruments back .