03
PHscan20
04
PHscan20
4
.
01
7
.
00
10
.
01
Hold
Meas
—
—
Power On/Off
—
Press
MEAS
key
to turn on the
tester, the display
shows
measured
values.
—
—
Preparation of pH Standard Buffer Solutions
The tester is packaged with three pH buffer packets required for calibration.
Open the pH7.00 buffer packet, place
the powder
into
a
250ml volumetric
flask. Pour
distilled
water
250ml
to
scale
line,
mix the
solution
until
reagent
is completely dissolved.
Preparation
of
pH4.01
and
10.01
standard
buffer
solutions
are
the
same
as
above. Prepared standard buffer solutions
should be stored
in hermetically
sealed glass containers.
Press and hold the MEAS key for 5 seconds, the tester will turn off.
If you do not press any key for 8
minutes,
the tester
will
automatically turn
off to conserve energy.
To disable the auto-off function, please read the SETUP MENU section.
The
tester contains an integrated
system menu that allows you
to customize
each displayed option to meet personal preference.
System Menu
PARAMETER
OPTIONS
pH Buffer
USA Standard (pH4.01, 7.00, 10.01, Default)
NIST Standard (pH4.01, 6.86, 9.18)
Single point calibration
Calibration Point
2 points calibration (Default)
3 points calibration
Do not use this function (Default)
Reset
Restores the parameters back to default settings
Disables the auto-off function
Auto-Off Function
Enables the auto-off function (Default)
Disables the auto-hold function (Default)
Auto-Hold Function
Enables the auto-hold function
Cal
1. Press
and
hold
the
CAL
key
for
3
seconds
to
enter
system
menu,
the
tester
shows default pH buffer option.
Press CAL key again to select the available standard.
2.
