11
11
sure that the commands are not mistaken for
erroneous signals.
In order to take accurate measurements,
In order to take accurate measurements,
In order to take accurate measurements,
In order to take accurate measurements,
In order to take accurate measurements,
make sure the instrument is calibrated
make sure the instrument is calibrated
make sure the instrument is calibrated
make sure the instrument is calibrated
make sure the instrument is calibrated
before use (see page 12 for H
before use (see page 12 for H
before use (see page 12 for H
before use (see page 12 for H
before use (see page 12 for HIIIII 931101 and
931101 and
931101 and
931101 and
931101 and
page 16 for H
page 16 for H
page 16 for H
page 16 for H
page 16 for HIIIII 931100 & H
931100 & H
931100 & H
931100 & H
931100 & HIIIII 931102).
931102).
931102).
931102).
931102).
For greatest accuracy, calibration should be
performed (or at least verified) every day for
measurements taken in the same type of
samples (e.g. cheese) or every time the
sample type is changed (e.g. cheese, meat,
sea water, etc.).
The best working temperature is around 20-
25°C (68-77°F). For greater accuracy, per-
form the calibration of the meter with stan-
dard solution at a temperature as close as
possible to the temperature of the sample
(± 1°C/±2°F).
TAKING SODIUM MEASUREMENTS
TAKING SODIUM MEASUREMENTS
TAKING SODIUM MEASUREMENTS
TAKING SODIUM MEASUREMENTS
TAKING SODIUM MEASUREMENTS
Remove the protective cap
of the
FC 300B
sodium-sen-
sitive electrode and, if pos-
sible, rinse it with some of
the sample you are going to
measure.
Lower the rubber sleeve to
get the junction to work prop-
erly.
Immerse the tip of the
FC 300B
electrode (2.5 cm/
1" i.e. the electrode junc-
tion must be completely im-
mersed) into the sample to
be tested without touching
the bottom of the beaker.
mannacl_r1.P65
12
12
Wait for up to 10 to 15 minutes to allow for
the electrode to adjust and stabilize, i.e.
until there is no drifting for at least a couple
of minutes.
During measurement, if possible, the sample
should be gently stirred (100 rpm).
pNa (for HI931101) and NaCl% (for HI931102)
measurements
Press the MODE key during measurement to
convert the displayed value of
HI 931101
to
pNa.
pNa = -log a
Na
where
a
Na
is the activity of ion Na.
Press the MODE key during measurement to
convert the displayed value of
HI 931102
to
%.
Press the same key to return to g/L mea-
surements.
MAGNETIC STIRRER
HI 190M
POWER
SPEED
ON
OFF
MAX
°C
MODE
MODE