Instruction Manual
47
Make sure the instrument has been calibrated before taking pH measurements.
DIRECT MEASUREMENT
To measure the pH of a sample using the Direct reading mode:
• Press
and then to select
pH Measure
mode.
• Select the Direct reading mode (see pH Setup for details).
• Submerge the electrode tip and the temperature probe
approximately 4 cm (1½”) into the sample to be tested.
Allow time for the electrode to stabilize.
• The measured pH value will be displayed on the LCD, together
with a short GLP information or “Default Calibration” message
if no pH calibration was performed.
Note: If the reading is out of range, “-----” will be displayed on
the LCD.
DIRECT / AUTOHOLD MEASUREMENT
To measure pH of a sample using the Direct/AutoHold reading mode:
• Press and then to select
pH Measure
mode.
• Select the Direct/AutoHold reading mode (see
pH Setup
for
details).
• Submerge the electrode tip and the temperature probe
approximately 4 cm (1½”) into the sample to be tested.
Allow time for the electrode to stabilize.
• The measured pH value will be displayed on the LCD. If pressing
, the “AutoHold” indicator will start blinking on the
LCD until the stability criterion is reached. The pH value will be
frozen on the LCD, along with “AutoHold” indicator.
• To return to normal
Measure
mode press .
Note: If the reading is out of range, “-----” will be displayed on
the LCD.
pH MEASUREMENTpH MEASUREMENT
pH MEASUREMENTpH MEASUREMENT
pH MEASUREMENT
70
Temperature Unit
The user can choose from the
Celsius
,
Fahrenheit
or
Kelvin
temperature
units.
To set the temperature unit:
• Use or to highlight the
Temperature Unit
option.
• Press and then use or to select
Celsius
,
Fahrenheit
or
Kelvin
degrees unit
.
• Press to confirm your selection or press to
cancel operation.
Reference Temperature
(only for
Linear
or
Non-Linear
temperature compensation)
To set the reference temperature:
• Use or to highlight the
Reference Tempera-
ture
option.
• Press
and then use
or to increase
/ decrease the value.
• Press to save or press
to cancel operation.