Model 3000 Survey meter User’s Manual Section 2
Ludlum Measurements, Inc. Page 2-9 April 2021 April 2016
If an alarm condition is present, tapping the ON/OFF button will
acknowledge and turn off the continuous tone alarm audio. Under an alarm
condition, the ALARM display indicator will remain on. Alarms are non-
latching in RATE mode. When Sigma Audio is enabled, and an alarm
condition is not present, a long press (at least a half second) of the
ON/OFF button will reset the Sigma Audio alarm level. The Sigma count
can only be reset in RATE Mode.
Figure 8: RATE mode display showing typical background radiation rate and the
low-battery icon.
MAX Mode Operation
While in MAX mode, the highest detected count rate (since the last reset) is
displayed. The word MAX will be displayed when in MAX mode.
Tapping the UNITS button will switch the displayed value between the
Primary and Secondary Units.
Tapping the AUDIO button will turn the “click” audio on/off. When
Sigma Audio is enabled, long-pressing the AUDIO button will toggle the
Sigma Audio beep on/off.
Under a non-alarm or alarm condition, a long press of the ON/OFF
button will reset the display. When Sigma Audio is enabled, the Sigma
Audio alarm level cannot be reset in Max Mode.
If an alarm condition is present, tapping the ON/OFF button once will
acknowledge and turn off the continuous tone alarm audio. (The “click”
audio will remain as selected under non-alarm conditions.) Tapping the
ON/OFF button a second time will toggle the audio setting. Under an
alarm condition, the ALARM display indicator will remain on until the
display is reset. Alarms in MAX mode latch with the display.
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