Kedida CT-6821, Руководство пользователя, Страница: 4 / 5

深
深
圳
圳
市
市
柯
柯
迪
迪
达
达
电
电
子
子
有
有
限
限
公
公
司
司
S
S
H
H
E
E
N
N
Z
Z
H
H
E
E
N
N
K
K
E
E
D
D
I
I
D
D
A
A
E
E
L
L
E
E
C
C
T
T
R
R
O
O
N
N
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C
C
S
S
C
C
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O
.
.
,
,
L
L
T
T
D
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4
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* Calibration

pH calibration
Prepare for 4 measuring glasses to calibration, 1 measuring glass for water and 3 measuring glasses for pH buffer
solution(pH4.0, pH6.8, pH9.1).
Please be aware of the order of the pH buffer solutions:
First: pH6.8, second: pH4.0, third: pH9.1
Take the pH 6.8 calibration for example:
STEPS OPRATIONS
1 Insert the electrode into the distilled water or purified water for 10– 30 minutes to activate before press
ON/OFF key to turn the meter on.
2 Place the electrode into the measuring glass of water to clean, and wipe it up by tissue
3 Place the electrode into the pH6.8 buffer solution, The pH value will be updated until a stable reading is
reached(The data maybe not accurate if the electrode is not be activated)
4 press CAL key for 3 seconds until the text „CAL‟ appear on the display, and release the key
5 Text „SA‟ will showing in the LCD denote that the current calibration result is saved
6 The text „END‟ will be displayed at the end. The meter is ready for pH measurement
*Overrage Reminder
There will be
“
1- - .-
”
on the display if the pH value is under 0 or over 14;
There will be
“
1- - .-
”
on the display if the ORP value is under -500mV or over +500mV;
There will be „L‟ or „H‟ on the temp. display area if the temperature is under 0
℃
or over 50
℃
.
*Low Voltage Reminder
The battery sign will be appeared on the display when battery replacement is needed.
MAINTENANCE
Keep the glass electrode clean, and cover with the protection cap when not use. Be aware of the damage of the
electrode when use it. Products should be kept and stored in a cool, dry place that away from direct sunlight.