5
b) pH 4.00 and pH 7.00 buffer solutions are included in the test kit, but pH 10.01 is not. Users
can purchase it separately if needed. The buffer solutions poured into the calibration bottles
are NOT for one-time use. They can be used for about ten to fifteen times as long as they are
not contaminated and the bottles are covered when not in use. After that, we recommend
replacing the buffer solutions in the calibration bottles with new ones that are in the buffer
bottles (50ml ones) to keep the accuracy of the standard buffer solutions.
*Do not pour used buffer solutions back into the buffer bottles in case of contamination.
c) The tester has self-diagnostic functions:
Self-diagnostic information
Checking and methods to fix
Wrong pH buffer solution or the range of
calibration solution exceeds standard.
a) Check whether pH buffer solution is correct
(1
st
point calibration must be 7.00).
b) Check whether the probe is damaged.
c) Start the calibration from pH 7.00, then pH
4.00 or 10.01
Press key when measuring value is not
stable during measurement.
Press key after icon appears and
stays for 2 to 3 seconds.
6. pH Measurement
6.1 Short press to turn on the tester. Rinse the probe in pure water and dry it. Dip the probe in
sample solution, stir gently, and allow it to stand until a stable reading is reached.
Get readings after comes up and stays for about 2 to 3 seconds.
6.2 Special notes
a) Applications of each model:
Most common liquid measurement such as
hydroponics, aquaculture, pools and spas,
water treatment, cooling towers, etc.
Cheese, sushi rice, meat, fruit, bread, soil, solid culture medium
and semi-solid medium measurement; Most common liquid
measurement.
Flat surface measurement such as skin, paper, fabric, leather and so on;
micro sample testing; Most common liquid measurement.
b) PH60S Spear probe testers are widely used for solids containing water or semi-solid medium.
When conducting such tests, pay attention to insert probe evenly, and be careful to prevent
probe from damage. If the medium is too hard (such as meat or fruits), please bore a small hole
with a knife before inserting the probe.
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