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 wait around 30 seconds till the reading stabilized.
6.after finished ,clear the electrode with pure water ,turn the meter off by pressing the “ON/OFF” key.
7.Always replace the protective cap after use.

Calibration.
1. Turn on pH meter
2.Immerse the electrode in pH 6.86 standard buffer solution. (under the temperature of 25°C)
3. Press the "CAL" button. Wait until the display digital is 6.86pH Then complete pH 6.86 calibration
Clean the electrode with distilled water and dry it with filter paper.
4.Immerse the electrode in pH 4.00 standard buffer solution,  Press "CAL" button.
Wait until the digital is 4.00 pH..Complete the pH 4.00 point calibration.
5.Clean electrode and dry it , put pH meter into pH 9.18 standard buffer solution. 

Check if reading is correct between 9.17-9.19pH.

Q: Are you trading company or manufacturer ?
A: We are factory.

Q: How long is your delivery time?
A: Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not

in stock, it is according to quantity.

Q: Do you provide samples ? is it free or extra ?
A: We can offer the sample, it's extra

Q: What is your terms of payment ?
A: 100% T/T in advance ,balance before shippment.

If you have another question, pls feel free to contact us as below:

Contact: Louise Zhou
Tele: +86 021 33897320-8042
Mobile(WhatsApp): +86 15180184494
Skype: louise02043

QQ: 1147330081