Model 702i and 711i
Technical Manual
Section 7
Ludlum Measurements, Inc.
Page 7-2
December 2018
In the upper-left corner is a battery icon, which appears green when the batteries have at least 10
minutes of useful life remaining. It appears yellow when the batteries have between 5 and 10
minutes left, and it appears red when the batteries have less than 5 minutes left. When the time is
short, the battery icon will indicate a remaining time in hours and minutes. Please note that these
times assume the system is running on the factory-provided batteries, and are approximated times,
as the battery life can change with use and from one charge cycle to another.
Just to the right of the battery is a calibration indicator. On initial power-on, this box will fill in with
orange until enough data has been collected to ensure that the system is calibrated. Then the box
will turn green, with a small pointer indicating the rate of calibration drift.
In the top center the screen displays the clock time. It is important to have this time set correctly,
including your time zone, so that the stored spectra will have the correct time recorded.
Figure 6 -
Dial Search Mode Screen
The numbers in the top right corner indicate the count rate for gamma rays and the current dose
rate. These help associate specific numbers with the visual elements of the dial. This version of the
display is shown in Figure 7.
Finally, at the bottom of the screen you will see three soft keys:
Identify
,
Background
, and one
additional choice that allows you to move to the next search display mode. (On systems where only
one mode is enabled, only the first two keys will be shown.)
