Delta HD2105.1, Operating Manual

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HD2105
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V2.3
The automatic turning off function is disabled when external power is used. On the other
hand, it cannot be disabled when the batteries are discharged.
FUNC/ENTER key
During normal measurement this enables the display and logging of the maximum (MAX), mini-
mum (MIN) and average (AVG) value of the pH, mV and temperature measurements, updating
them with the acquisition of new samples. The acquisition frequency is once a second.
In the menu, the ENTER key confirms the current parameter and then goes to the next one.
The MAX, MIN and AVG measurements remain in the memory until the instrument is on, even af-
ter exiting the calculation function. To reset the previous values and restart with a new measurement
session, press FUNC until the message “FUNC CLR” appears, then use the arrows to select YES
and confirm using ENTER.
The pH and temperature values are displayed at the same time. According to settings in the
"RCD Mode" menu item, the maximum, minimum and average indications have different
meanings: please see the description of this menu item below.
Attention: the data captured using the Record function cannot be transferred to the PC
.
CAL/ key
It increases the current parameter when used in the menu; when used in measurement mode, it
starts the pH electrode calibration (please see the chapter dedicated to calibration on page 17).
°C/°F key
When the temperature probe is connected, the measured value is used to compensate the pH meas-
urement; the key changes the unit of measurement from degrees Celsius to Fahrenheit.
If the probe is not present, the compensation temperature must be entered manually: to manually
change the value shown in the display lower line, press °C/°F once. The temperature indicated starts
blinking. While the display is blinking, it is possible to change the compensation temperature using
the arrows (
and ). Confirm using ENTER. The display stops blinking, and that temperature is
used for compensation.
If the temperature probe is not present, to change the unit of measurement between °C and °F, it is
necessary to press
twice the °C/°F key.
pH/mV-ESC key
Changes the main variable measurement between pH and mV. The selected parameter is used for
display, printing, and logging.