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1.2 Duration of display
If for approximately two minutes none of the buttons of the DFM 3 is pressed, the meter will be
switched off automatically. The measuring and setting values stored in the memory will be maintained.
•
The stored values can be recalled by depressing the function or value buttons
•
New measurement is instantly possible when the metering button is depressed.
The values of the last meter reading are stored until a new meter reading is taken.
The DFM 3 is fitted with separate memories for continuous light and flash measurement.
2 The functioning of the DFM 3
2.1 Preparations
Battery
The DFM 3 operates with a 1.5 V AA-type battery (alkaline-manganese battery). Since the meter’s
power consumption is minimal, the battery will last for a long time. When the battery’s capacity becomes
exhausted, the
BAT
symbol appears on the display as a warning that the battery has to be replaced at
the earliest possible opportunity. Measurements cease to be possible if the display only indicates
BAT
.
The battery must be immediately replaced.
To change the battery open the battery compartment of the DFM 3. Remove the exhausted battery and
insert the new one. Ensure correct polarity "
+"
and "
–"
! Push back the battery compartment cover.
Battery changing deletes all stored values.
