Ludlum Measurements 3000 - Page 17

Model 3000 Survey meter User’s Manual Section 2
Ludlum Measurements, Inc. Page 2-7 April 2021
See the Model 3000 drawing at the beginning of this manual to
reference the following controls:
ON/OFF button:
 Power On: Press for approximately one-half of a second and release
(all LCD segments will activate, and firmware version will be
shown).
 Power Off: Press and hold approximately four seconds. The display
will show a 3, 2, 1 countdown for the final three seconds of
shutdown. Releasing the ON/OFF button during shutdown will
return the device to the previous state of operation. At completion
of the shutdown count, the LCD will go blank.
Short Tap (tap-pressing the button and releasing in under a half second):
 Normal Operation: Will acknowledge/silence alarms in all modes
of operation.
 Change Log Location Selected Position (if datalogging is enabled).
 Will move selection position in the device menu.
Long Press (pressing the button and releasing for at least a half second):
 Start/reset COUNT Timer in COUNT mode.
 When Sigma Audio is enabled, pressing the ON/OFF button will
take a new background reading and update the Sigma Audio level
(in Rate Mode only).
 Reset/Zero: When in Rate mode, a long press of the ON/OFF will
reset/zero the averaged rate. The minimum display will be shown
before returning to the exposure rate. When Sigma Audio is
enabled, Rate Reset is disabled.
 Will reset MAX mode display.
UNITS button:
Short Tap (pressing the button and releasing under a half second):
 Used to switch between Primary and Secondary units in all available
modes.
Long Press (pressing the button and releasing for at least a half second):
 Used to toggle the display in COUNT mode between the timer and
the reading.