Delta OHM HD2302.0, Руководство пользователя, Страница: 8 / 32

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By pressing this key once the maximum (MAX) value of the measurements captured by the probe
connected to the instrument is displayed, updating it with the acquisition of new samples;
-
by pressing this key again the minimum (MIN) value is displayed;
- by pressing this key a third time the average (AVG) value is displayed.
The acquisition frequency is once a second.
The MAX, MIN and AVG values remain in the memory until the instrument is on, even after exit-
ing the DATA calculation function. When the instrument is off, the previously memorized data are
cleared. Upon turning on, the instrument automatically starts memorizing the MAX, MIN and AVG
values.
To reset the previous values and start with a new measurement session, press until the
FUNC_CLRD message appears.
By pressing this key the current measurement update is frozen and the "HOLD" message will ap-
pear in the upper left-hand corner of the display. To return to the current measurement, press the
key again.
It is also used to disable the
AutoPowerOff function (see the description of the key on page 7).
By pressing this key the
unit of measurement of the main input quantity is selected : the unit of
measurement will appear in the upper part of the display; the measured value will be displayed in
the central line. By repeatedly pressing the UNIT key, the desired unit of measurement can be se-
lected. In the combined probes,
UNIT key allows to select one of the available measures (in these
probes, unit of measurement cannot be changed).
NOTE: The units of measurement available are determined according to the probe connected to
the input, as reported in the following table:
Type of measurement Unit of Measurement
Illuminance (PHOT) lux - fcd
Irradiance (RAD - UVA - UVB - UVC - PYRA) W/m
2
- W/cm
2
PAR
mol/(m
2
s)
Luminance (LUM 2) cd/m
2
It displays the difference between the current value and that measured on pressing the key. The
"REL" message is displayed on the left.
To return to the normal measurement, press the key again.
DATA key
HOLD key
REL key
UNIT key