Apera Instruments PH60 Series - Ph Measurement

6
Calibration
USA Series
NIST Series
Indication icon
Recommended
1-pt
7.00 pH
6.86 pH
Accuracy requirement ≥
0.1 pH
2-pt
Option A
1
st
pt: 7.00 pH
2
nd
pt: 4.00 pH or
1.68 pH
Option
A
1
st
pt: 6.86 pH
2
nd
pt: 4.01 pH or
1.68 pH
Range < 7.00 pH
Option B
1
st
pt: 7.00 pH
2
nd
pt: 10.01 pH or
12.45 pH
Option
B
1
st
pt: 6.86 pH
2
nd
pt: 9.18 pH or
12.45 pH
Range >7.00 pH
3-pt
1
st
pt: 7.00 pH
2
nd
pt: 4.00 or 1.68 pH
3
rd
pt: 10.01 or 12.45 pH
1
st
pt: 6.86 pH
2
nd
pt: 4.01 or 1.68 pH
3
rd
pt: 9.18 pH or 12.45 pH
Range: 0 to 14.00 pH
5.3 Self-diagnosis
Icons
Self-diagnostic information
Checking and how 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 pH buffer solution is in good
condition (fresh and clean)
c) Check whether the probe is damaged.
d) Check if there is any air bubble in the glass
bulb. If so, shake it off.
Press key when reading is not
stable yet during calibration
Wait for the smiley face icon to appear and stay,
then press to finish calibration
* If you find any air bubble in the glass bulb of the pH electrode, simply shake the tester in the air
with force for a few times, and the bubble should disappear right after. The existence of an air bubble
in the glass bulb will cause instable measurements.
6 pH Measurement
6.1 How to take pH measurements
Short press to turn on the tester. Rinse the probe in distilled water, shake the meter and dap
off excess water with tissue paper (do not rub or wipe the glass sensor). Dip the probe in sample
solution, stir gently, and allow it to stand until a stable reading is reached. Record readings after
appears and stays on the screen.