Ludlum Measurements 25009185, Manual

Page: 16 / 84

10 CHAPTER 1. INTRODUCTION
for the user to find small increases above the background radiation level. In this mode, the
instrument measures background for 8 seconds after power-up, and then beeps whenever
the rate increases by a small amount. Users are freed from watching the numeric value to
"find" something. They can simply listen for multiple beeps. Setup of the instrument is
accomplished through the front-panel buttons, or through Lumic 2.0 software available from
Ludlum Measurements.
Front-panel setup can be disabled via the internal switch on the Model 3001 in order to pro-
tect settings from inadvertent changes. When the settings are protected, the user can view
the settings or modify a limited number of settings as defined with the Lumic software. Us-
ing the Lumic software, the Model 3001 can be configured to allow changes to the alarms
and/or count time even when in protect mode.
The unit is operated with four alkaline AA batteries for operation from -20 to 50 °C (-5 to 122
°F). Battery life is approximately 500 hours (as low as 60 hours w/backlight always on) under
normal usage. A low-battery indicator on the LCD warns when less than 16 hours of battery
life remain. The Model 3001 may optionally be provided with a 1/8-inch stereo headphone
jack that would allow for headphone use for audio output. It is located near the left handle
base.
If a headphone jack is not in use, the Model 3001 may optionally be provided with an RS-
232 serial output for connection to PC or other electronic device. For more advanced use:
See Appendix A for information on our Auxiliary Communications features, which allow the
instrument to expand its capabilities with a variety of external devices through a standard
serial interface.
Ludlum Measurements, Inc.