Digital PH Meter

Description

Brand New and High Quality.

Excellent meter, very accurate, and durable.

With a protective plastic case and calibration screwdriver.

An ideal instrument for aquarium, fishing industry, swimming pool, school laboratory, food & beverage etc.

In addition, you must calibrate this tester whenever the following happens:

• If the tester was used or laid aside long time;  recalibrate it  
  
• It was used too often;  recalibrate it    
  
• Need High Accuracy.   recalibrate it      
  
• Note: You will need to calibrate it after you get it. 
  

Specification:

*Measuring pH Range: 0.0 – 14.0 pH

*Resolution: 0.1 pH

*Accuracy: ±0.1 pH (at 20°C/68°F), ±0.2 pH

*Operating Temperature: 0 – 50°C (32 – 122°F)

*Calibration: Manual, 1 point

*Relative Humidity: <95%

*Life: Approx.700 hours of use

 

Package:

*1 x Digital PH Meter Tester Pen

*1 x Calibration Adjustment Screwdriver

*3 x Button Cell Batteries (included)

*1 x User Instruction Manual (English)

 

The way to Calibrate:

• Immerse the electrode in pH6.86 (under 25°C) standard buffer solution of phosphate, and gently shake the electrode.                                        

Note:

1. Please allow 1-3mm errors due to manual measurement. The first thing I did was calibrate it. I picked up some distilled water and measured 250 mL into a glass jar. Luckily, I have a little kitchen scale so I could be precise. I poured in the 6.86 solutions, stirred until it dissolved, and placed the tip of the meter into the solution. It measured nearly 7, and so I used the screwdriver to adjust the levels on the back end of the meter. It’s easy enough to do, but I did have to hold the tip of the meter into the water with my right hand and make adjustments with my left while I was bent over checking the reading until it hit 6.86. Then I cleaned off the tip with the electrode sensor by dipping it into the more distilled water, waited until it dried, and then went through the calibration process again with the 4.01 buffer. This time it was a lot closer, but I still had to make a minor adjustment, and then it was ready.