1) 7.00 pH
2) 10.01 or 12.45 pH
1) 6.86 pH,
2) 9.18 pH or
12.45 pH
1) 7.00 pH
2) 4.00 or 1.68 pH
3) 10.01 or 12.45 pH
1) 6.86pH
2) 4.01 or
1.68pH,
3) 9.18 pH or
12.45 pH
b) For pH Calibration buffer solutions, we recommend that users replace new buffer solution
after 10 to 15 times of use to keep the standard buffer’s accuracy. Do NOT pour the used
calibration solutions back into the solution bottles in case of contamination.
c) This pH probe will NOT give accurate and stable readings for distilled or deionized water.
This is because distilled and deionized water do not have enough ions present for the
electrode to function properly. Specialized pH probes need to be used for
distilled/deionized water measurement. Contact us at info@aperainst.com for more details.
d) When%testing%purified%water%like%spring%water%or%drinking%water,%it%will%take%longer%for%the%readings%
to%get%stabilized%(typically%3-5%minutes)%because%there%is%very%few%ions%left%to%be%detected%by%the%
sensor%in%those%purified%water.
e) Do NOT store pH probe in distilled water to prevent permanent damage to the probe.
f) For the self-diagnosis information, please refer to the table below:
Self-Diagnosis information
Checking and methods to fix
Wrong calibration solution or the range of
calibration solution exceeds standard.
a) Check if calibration solution is correct (1
st
point
of pH calibration must be pH 7.00)
b) Check if electrode is damaged.
c) Check if there is any air bubble in the glass
bulb pH sensor
Is pushed before measurement is stable
( comes up and stays)
Wait for the smile icon to come up and stay,
then press
* If you find any air bubble in the glass bulb of the pH sensor, simply shake the probe for a few times
to remove it. The existence of an air bubble in the glass bulb will cause instable measurements.
* The 1
st
point calibration must be 7.00 pH. Perform the 2
nd
point calibration (4.00 pH) immediately
after the 1
st
point. Do NOT turn off the meter before you conduct 2
nd
point calibration. If the meter is
turned off after 1
st
point calibration, users will need to restart the calibration process with the 7.00 pH
first and the 4.00 pH following after. Calibrating directly in pH 4.00 after turning meter off and back on
will cause Er1.
To Next Page
Loading...
Need help?
General
