MODEL 9DP-1 Operator’s Manual
Ludlum Measurements, Inc. 13 December 2015
4.4.2 Function Display
The Model 9DP-1 comes pre-programmed with three functions which can be
displayed. The function area is sandwiched between the measurement reading
(above) and the instrument status (below).
Three functions that are pre-programmed are Integrate, Peak, and Pulsed Mode.
Users can use these three functions by pressing the FUNCTION key on the
control panel until the desired function appears.
Integrate Function
The Integrate Function simply accumulates or integrates the rate reading while
the instrument is turned on. The display reads, “Integrated Dose,” followed by
the value and measurement unit as it accumulates. It is operative all the time,
independent of whether or not this function is being displayed or not.
The default behavior of this function is that it automatically accumulates until it is
reset. It is automatically reset every time the instrument is powered off. The
integrated value can also be manually reset to “0” by pressing the ACK/RESET
control button for three seconds while this function is being displayed.
Users who do not want the reading automatically reset when it is shut off can re-
program the instrument to only reset when it is done via the manual method just
described.
Integration will not occur for the first 60 seconds after the instrument is powered
on to allow the instrument time to settle.
Peak Function
The Peak Function reads the highest measurement value attained since the
instrument was last turned on. It remains active, independent of whichever
function is currently being displayed. It is reset automatically when the instrument
is shut off or can be manually reset by pressing the ACK/RESET control button
for three seconds while this function is displayed. Peak readings will not be
recorded during the first 30 seconds after the instrument is powered up to allow
the instrument time to settle.
Pulsed Mode
The Pulsed Mode Function locks the instrument into the highest instrument
range, which helps provide a better (and quicker) response when taking readings
in a pulsed field while sacrificing low reading resolution. The Pulsed Mode can be
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