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
I
I
C
C
S
S
C
C
O
O
.
.
,
,
L
L
T
T
D
D
3
http://www.kedida.com.cn/
*
Backlight Mode
1. Press the ON/OFF key for 3 seconds, until the
“
pH
”
display on the screen.
2. Press HOLD key to select
“
LED
”
on the screen.
3. Then press CAL to confirm the backlight mode.
4. Power off the meter to close the backlight mode.
*
Hold Feature
Press
HOLD
to freeze the current reading, and „HOLD‟ will be appeared on the LCD. Press
HOLD
again to release the hold
mode.
*
Restore factory defaults
1. If the meter is out of order, Press the HOLD key until the
“
CLR
”
display on the screen, release the HOLD key and the
factory setting is ready.
2. The meter needs to recalibrate for pH measurement and Conductivity after the factory setting.
*
Automatic temperature compensation (ATC)
The product is capable of measuring with automatic temperature compensation when “ATC” displays on the screen.
*
℃
/
℉
Interchangeable
The default mode is
℃
, press CAL key to switch to
℉
.
*
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