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pH Calibration Demonstration
 Calibrate unit during first time of use, 
or if unit has not been used for a long time.

 



Step 1: 
 
 Remove the protective cap. 



Step 2: 
 
 Turn unit on. 

Clean electrode with distilled or de-ionized water, and wait until reading stabilizes.


Step 3: 
 
Determine which pH level you need. 

For pH4: Dip the electrode into 4.0 pH buffer solution. 

Display should show between 3.9 to 4.1 for correct reading.


Step 4:

If the display does not show correct pH number, adjust with screw at back manually.


Step 5: 
 
 Clean electrode with distilled or de-ionized water. 

After use, gently pat with tissue paper to absorb water from glass bulb. Glass bulb is very delicate and should be handled with extreme care.
pH Pen calibration can be done with any level pH solution.