Operation
EPM2000/EPM2000e Reference Guide
18
MODES
NORMAL MODE
Use Normal Mode to make most measurements. The EPM2000 displays continuous live updates of
incoming probe data in Joules, Volts, Watts, or Hertz for pyroelectric/silicon probes and data in Volts
or Watts for thermopile probes.
If the frequency of incoming pulses exceeds the display refresh rate (3 Hz), then some readings will
not appear on the LCD, but if the instrument has been programmed to store readings in the buffer, all
readings will be stored.
An EPM2000 channel is in Normal Mode only when
, , , , and are all not
visible. Place the channel into Normal Mode by pressing , , , or .
AUTO MODE
Use Auto Mode to automatically seek the most appropriate range for any given input. Auto Mode is
particularly useful when the input signal varies greatly during a sampling, because the EPM2000 is
constantly seeking the best display range at each pulse. The EPM2000 can autorange while
measuring Joules, Volts, or Watts, and the measurement unit can be changed while in Auto Mode, but
the trigger source must always be external. The EPM2000 will not autorange from an internal trigger.
While in Normal Mode, measuring Joules, Volts, or Watts, press
to set the channel in Auto Mode.
The next pulse is used to determine the proper range and while the channel is seeking this range, the
annunciator blinks. The annunciator stops blinking and locks on when the EPM2000 has located
the proper range. The next pulse will use this new range. Press
again to deactivate Auto Mode.
For best results, manually set the EPM2000 to its highest range before activating Auto Mode.
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