4
“ATC” ICON INDICATION
Probe type
ntc 10K (Default)
ntc 30K
not
Plug in
Temp. XX.X
Temp. XX.X
Manual
temp.
Un-plugged
“
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“
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ATC icon
O
O
X
pH/mV CALIBRATION PROCEDURE and MEASURING
NOTE:
When not use the electrode, it should immerse the “Electrode sensing head” into the “Protection bottle.”
NOTE:
Calibration is necessary before operation, the calibration procedures refer to as below
“ a) to b)” :
a) Required Equipment for calibration:
1) pH electrode.
2) pH buffer solution.
NOTE:
Make sure to use fresh solution each time due to the contaminants in the solution will affect the
calibration and the accuracy.
b) Calibration Procedure:
1) Prepare the pH e
lectrode, install the “probe plug” into the right “BNC port” of the meter.
2) Power on the meter by pressing
PWR
button.
3) Long pressing
MODE + CAL
buttons
to enter pH calibration mode. Immerse the pH probe to pH buffer
solution. Meter will automatically recognize pH buffer values.
NOTE
: Calibrating the pH in the incorrect buffer solution, “Er 3” will appear on the bottom of screen.
4) User can do 1, 2 or 3 points calibration.
Rinse the probe with de-ionized water before doing each pH buffer calibration.
If you are doing multipoint calibration, short pressing
MODE
button to select pH 4 or pH7 or pH 10
calibration mode.
HOLD:
↑
to increase
ADJ:
↓
to decrease
SET:
←
to left digit
CAL:
→
to right digit
Referring to the Adjust range as below:
Calibration Points Adjustable/Calibration range
pH4
3.75 to 4.25
pH7
6.75 to 7.25
pH10
9.75 to 10.25
NOTE: Before doing pH 4, 7, 10 calibrations, if the value is out of above adjustable range, the meter
displays “CAL Err”. Please immerse the electrodes to distilled water or tap water to see if the value is
within the adjustable range first. After entering the calibration mode, immerse the electrode to
calibration solution to do the calibration.
5) Long pressing
SET
button to save and complete
calibration, then screen shows “
SA
”.
To escape calibration mode, long pressing
MODE+CAL
button, the bottom of screen
will show “ESC” in few
seconds and return to normal measurement mode.