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b
With the desired value displayed, press the
key
to enter the value. (The set value display section stops
flashing.)
n
When setting a parameter with a minus sign, call up the
parameter and press the
key first. Then, press
the key once to flash a minus sign.
Warning
Press the key for the storage of a set value in the
memory. Each time a set value is changed, check that no
digit is flashing. Also, make sure to press the
key.
IV.Calibration and Handling of Electrode
Warning
Calibration of electrode is an indispensable process in the use of the control unit. When using an electrode for the first
time, washing it, replacing and recalibrating it, even if the ZERO or SPAN described in the following procedure has been
set up, press the
key to make the display flash and press the
key to memorize the value newly.
<Calibration for PH type>
z
Change the mode, if MAN mode has been selected, into
the AUTO mode.
x
Prepare two types of pH standard liquid. (pH7 liquid
and pH4 liquid)
c
Press the
key to call up parameter ZERO. Place
the pH electrode in the pH7 standard liquid for 1 to 2
minutes. (
lights up and all the digits are
displayed.)
v
Set the value of the pH7 standard liquid.
Press the
key to make the highest digit flash.
Pressing the key while the digit is flashing
increases the value by 1. Pressing the
key then
moves the flash to the next digit.
For the set value, take the value on the package of the
standard liquid in accordance with the temperature of
the liquid. (The value indicated for an electrode
without a temperature compensating element is
specified for a temperature of 25 °C.)
indicates blinking of the display.
Even when setting the parameter to the same value as the
current one, carry out steps
c
and
v
above.
ZERO
F U N C
F U N C
F U N C
START
S T O P
F U N C
START
S T O P
F U N C
MAN
ZERO SPAN
AUTO
°
C
ALM
SET
spm
pH
Hi
Lo
PB
MAN
ZERO SPAN
AUTO
°
C
ALM
PB
PB
PB
SET
spm
Hi
Lo
MAN
ZERO
SPAN
AUTO
°
C
ALM
SET
spm
pH
pH
Hi
Lo
MAN
ZERO
SPAN
AUTO
°
C
ALM
SET
spm
pH
Hi
Lo
Caution
In the step of calibration, make sure that the pH
electrode is soaked in each pH standard liquid
completely. Be careful not to expose the electrode to
the air or use the same liquid for both ZERO and
SPAN. Otherwise, incorrect values will be stored in the
memory which will result in abnormal operation.
F U N C
