HD2102 - 9 - 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),
minimum (MIN) and average (AVG) value of the measurements captured by the probe connected to
the instrument, updating them with the acquisition of new samples. The acquisition frequency is
once a second.
The MAX, MIN and AVG measurements remain in the memory until the instrument is on, even
after 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.
In the menu, the ENTER key confirms the current parameter and then goes to the next one.
Pressed together with the UNIT-Q/T key, enables the integral Q(t) calculation function.
Pressed together with the MENU-Clear Q/T, resets the previous integral Q(t) calculation (please see
the description of the UNIT key).
Attention: the data captured using the Record function cannot be transferred to the PC.
HOLD/ key
It increases the current parameter when used in the menu; when used in measurement mode, it
freezes the measurement in progress at the current value, the message HOLD appears in the upper
side of the display. To return to the standard measurement, press the key again.
Upon turning on the instrument, the AutoPowerOff function can be disabled by holding the HOLD
key down (please see the ON-OFF key description).
During calculation of the integral Q(t), by pressing the key the displayed value is frozen without
suspending the calculation in progress.
UNIT - Q/T key
During measurement and integral Q(t) calculation, it allows selection of the unit of measurement.
By repeatedly pressing the UNIT key, the desired unit of measurement can be selected. In the
combined probes LP 471 P-A and LP 471 A-UVeff, the key allows to select one of the available
measures (in these probes, unit of measurement cannot be changed).
NOTE: The units of measurement are determined according to the probe connected to the input,
as reported in the following table: