Apera Instruments PH60-WW User manual
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ISO 9001: 2015
V2.1
ATTENTION
NEVER use the product when it’s freezing cold. Let it warm to room temperature
before using.
NEVER use your nger to touch the pH glass membrane or use other materials to
rub it. Doing so could generate static electricity and cause measurement errors. To
remove extra water on electrode, just shake it o or blot dry with Kimwipe or lint-
free cloth.
ShortPress — 1 second LongPress — 3 seconds
4.1.4 Wait for the reading to stabilize (when stays on the screen), then short press
again to nish the rst point calibration (pressing too early could lead
to Er2 error). "7.00" will be ickering and the meter will return to measurement
mode. Icon (the middle point) will appear at the bottom left, indicating a
successful 1-point calibration.
4.1.5 To calibrate the 2nd point, rinse o the electrode with pure water and remove
excess water. Dip the electrode into pH 10.01 solution and repeat Step 4.1.3 to
4.1.4. "10.01" will be ickering and (the high point) will show up next to
, indicating a successful 2-point calibration.
4.1.6 To calibrate the 3rd point, rinse o the electrode with pure water and remove
excess water. Dip the electrode into pH 4.00 solution and make a quick stir, then
repeat Step 4.1.3 to 4.1.4. "4.00" will be flickering and (the low point) will
display next to and , indicating a successful 3-point calibration.
4.2 NotesaboutCalibration
4.2.1 Always start calibrating with pH 7.00 first. Perform the 2nd and 3rd point
calibration immediately after the 1st point is finished. Do NOT turn off the
meter before you calibrate the second or third point. Otherwise, after you
restart the meter and perform calibration in pH 4.00 or pH 10.01, Er1 error
will be generated and you will have to calibrate with pH 7.00 again. For more
troubleshooting tips with calibration, refer to Section 14.
4.3HowOftentoCalibratetheElectrode?
The frequency that you need to calibrate your pH electrode depends on many factors such
as the nature of test samples, condition of electrodes, and the requirement of the accuracy.
For high-accuracy measurements (≤ ±0.02pH), the electrode should be calibrated before
every test; For general-accuracy measurements (≥ ±0.1 pH), calibrate the electrode every 1-2
weeks.
Inthefollowingcases,theelectrodemustbere-calibrated:
• The electrode hasn’t been used for a long time or a dierent electrode is connected.
• After measuring strong acid (pH<2) or strong base (pH>12) solutions.
• After measuring uoride-containing solution and strong organic solution.
• There is a significant temperature difference between the test sample and the buffer
solution.
5.1HowtoTakepHMeasurement
5.1.1 Short press to power on. Remove the storage
sleeve and rinse the electrode in distilled/
deionized water, then shake o the excess.
5.1.2 Submerge the electrode into your sample solution
at least 1 inch deep, make a quick stir and hold
still.
5.1.3 Record the reading as the pH measurement
when it is stabilized ( comes up and stays on
screen).
The meter is only as accurate as the electrode is clean. Always thoroughly rinse o
the electrode before and after each measurement with distilled water or deionized
water in a container or with a wash bottle.
To remove excessive water, just shake them o or blot dry with Kimwipe or lint-free
cloth. Neverrub the glass membrane of the electrode. Otherwise static electricity
will be generated and cause measurement error.
For tough contaminants staying on the glass membrane or junction, refer to the
following table for cleaning procedures:
TypeofContamination CleaningAgent SoakingTime
Lipophilic substances, e.g.
oil and fat deposits Home dish soap water 5 – 10 minutes
Proteins Apera Electrode Cleaning
Solution (SKU: AI1166) 30 – 60 minutes
Inorganic coatings such as
hydrocarbons
commercially available
glass cleaning solutions 5 – 10 minutes
Hard, scale-type calcium
deposits
Apera Electrode Cleaning
Solution (SKU: AI1166) 5 – 10 minutes
TypeofContamination CleaningAgent SoakingTime
Alkaline coatings Apera Electrode Cleaning
Solution (SKU: AI1166) 5 – 10 minutes
Acidic coatings 0.1M NaOH solution 5 – 10 minutes
Sulde-containing
substances Thiourea
30– 60 minutes, leave until
junction discoloration
disappears.
Unknown substances Apera Electrode Cleaning
Solution (SKU: AI1166) 30 – 60 minutes
Use a soft brush to help thoroughly clean o the contaminants. After the cleaning
procedure, the pH electrode should always be soaked in 3M KCl solution for 12-24 hours
for rehydration. A re-calibration is also necessary before a new pH measurement.
pH
11.1
Never twist the black
rubber part to prevent
damage.
11.5pHElectrodesCompatiblewiththeMeterforOtherApplications
LabSen 335 pH/Temp. Electrode for wastewater, suspensions, and emulsions
LabSen 246-5 pH/Temp. Electrode for small-volume solutions and test tubes
LabSen 845 pH/Temp. Electrode for strong alkaline and high-salinity solutions
LabSen 835 pH/Temp. Electrode for HF-containing and strong acidic solutions
LabSen 865 pH/Temp. Electrode for high temerature and caustic solutions
LabSen 855 pH/Temp. Electrode for viscous samples
LabSen 765 pH/Temp. Electrode for meats
PH60S-E spear probe for foods e.g. cheese, sauce, milk, fruits, dough, etc.
GS2-E spear probe for soil direct test
PH60F-E at probe for surface test
①②
③④
⑤
⑥
⑦
⑧
Trouble Reason HowtoFix
Calibration
Error
Incorrect calibration
order (Er1)
Always calibrate pH 7 rst, then pH 4 or
pH 10. Refer to Section 4.2.1.
(Er1)
Contaminated
electrode (Er1)
Thorougly clean o the electrode. Refer
to Section 6.
Aged electrode (Er1) Replace the electrode.
Dried-out electrode
(Er1)
Soak in the soaking solution overnight
to restore.
Electrode is not in full
contact with solutions
(Er1)
Air bubbles around
the sensor (Er1)
Make a quick stir in the solution to
remove air bubbles.
Pressing too fast
(Er2)
Wait for the reading to be fully stabilized
before pressing to finish the
calibration
Thorougly clean o the electrode. Refer
to Section 6.
Trouble Reason HowtoFix
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