GHM Delta OHM HD3405.2, Руководство пользователя

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6pH 7pH
pH
8pH
74.04mV
-74.04mV
59.16mV
-59.16mV
54.20mV
-54.20mV
0mV
mV
T=100°C, 74.04mV/pH
T=25°C, 59.16mV/pH
T=0°C, 54.20mV/pH
When a temperature probe is present, the instrument automatically applies the ATC automatic tem-
perature compensation function. To disable it, the temperature probe must be disconnected.
If the temperature probe is not present, and the correct value is not entered manually, the extent of
the error committed in pH measurement is proportional to temperature and pH value itself.
In absence of the temperature probe, the lower display shows the manually set compensation tem-
perature (default=25°C).
To point this condition out, the °C or °F symbol blinks intermittently near the temperature value.
Moreover, on the main display an "m" (
m anual) is turned on near the battery symbol (if present).
On the print-outs, the MT indication is printed. Instead, if the probe is present, the AT symbol is
printed.
To manually change the compensation temperature press °C/°F once: the indicated temperature
value starts blinking. Select the desired temperature value
by using the arrows and confirm with
ENTER. The display stops blinking, and the temperature displayed is used for compensation.
To change the unit of measurement between °C and °F, it is necessary to press twice
the °C/°F key.
pH electrode calibration
The electrode calibration is used to compensate the zero potential and slope deviations to which the
electrode is subject with time.
The calibration frequency depends on the accuracy desired by the user and by the effects that the
measured sample have on the electrode. Generally, we recommend daily calibration, but it is the
user's responsibility from personal experience, to establish the most appropriate frequency.