PRM-7000 / 8000 / 9000 Users Guide | 15
6.1 Perpetual Timed Measurements
By resetting the in-line statistical counters - see “9.1 Resetting Counter Values (Reset
Counters)” - the combination of the Elapsed Time Display and the Average Screens
forms the basis for a perpetual, any-length, timed measurement.
The true average of actual counts over the elapsed time enables timed measurements of
hours, days or even months. This is very useful for long term monitoring.
NOTE: After completion or cancellation of a Timed Measurement, the PRM Instru-
ment will reset the Average, Minimum, Maximum and Total Count Registers, as well
as Elapsed Time Register.
7. Changing the Units of Measurements (Set Units)
The PRM Instrument can display measurements in microrems per hour (μR/hr), millirems
per hour (mR/hr) and microSieverts per hour (μSv/hr), Counts per Second (CPS) and
Counts per Minute (CPM).
1. From the Home Screen, press
to activate the Main Menu
2. Press
once to move to “Set Units”
3. Press
key to select the Set Units menu
4. The current units will be displayed and pressing the
key will
change the setting
5. Press
when complete to return to the Main Menu
8. Selecting User Preferences (Settings)
Various settings can be selected to enable the user to customize the behavior of the
PRM Instrument as desired. Settings remain in place until the battery is exhausted. If, at
any time, the user desires to replace the current settings with the factory default settings,
perform a Hardware Reset of the device from the Utilities menu.
To enter the Settings Menu, press the
to enter the Main Menu and use the arrow
keys to advance until “Settings” is displayed in the lower line. Press
to enter the
Settings Menu. The specifi c settings will be discussed in the sections that follow.
8.1 Beeper On/Off
The current state of the Beeper will be displayed. Press to change. The Beeper
tone sounds when a nuclear particle is detected and provides audible feedback as to the
current measurement level.
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