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CHAPTER 2. GETTING STARTED
2.9 MAX Mode Operation
While in MAX mode, the highest detected count rate (since MAX mode was selected) is dis-
played. The word MAX will be displayed when in MAX mode.
A short press of the UNITS button will switch the displayed value between the Primary and
Secondary Units (Tertiary Units if the detector is configured for alpha/beta).
A short press of the ON/AUD button will cycle through the “click” audio volume levels. When
Sigma Audio is enabled, a short press of the ON/AUD will toggle the Sigma Audio volume
levels. If multi-level audio is disabled, a short press of the ON/AUD button will toggle audio
between Off and On.
Under a non-alarm or alarm condition, a long press of the ON/AUD 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, a short press of the ON/AUD button will acknowledge and
turn off the continuous tone alarm audio. (The “click” audio will remain as selected under
non-alarm conditions.) Alarms are latching in MAX Mode. Under an alarm condition, the
ALARM display indicator will remain on until the display is reset.
If other operational modes are available, a short press of the MODE button will move to the
next available operational mode.
A short press of the LOG button, if datalogging is enabled, will log the currently displayed
MAX value.
Figure 2.12: MAX Mode Display With ALARM Indication
2.10 COUNT Mode Operation
When entering COUNT Mode from another operational mode, the currently selected COUNT
Unit will be displayed for approximately one second. The purpose of COUNT mode is to
count for a predetermined amount of time, and to display the results on the display. Prede-
fined count times of 6 seconds, 30 seconds, 1 minute, 2 minutes, 5 minutes, and 10 minutes
are available as well as a user-defined count time and continuous counting operation (count
Ludlum Measurements, Inc.
