MODEL 9DP-1 Operator’s Manual
Ludlum Measurements, Inc. 8 December 2015
3.1 On/Off
This button is used to turn power on and off to the instrument. To turn on the
instrument, only a momentary press is required. A power-on sound can be heard
within one second of pressing the ON/OFF button. There is about a four to
five-second delay before the screen wakes up and presents the Startup View.
To turn off the instrument, press the ON/OFF button by pressing and holding it
down for approximately two seconds. When the system recognizes this
command, it changes the screen to the System Status View with the message,
“Instrument Shutting Down,” displayed.
3.2 Function
The Model 9DP-1 supports built-in functions. These functions are displayed
below the main instrument rate reading. Pressing the Function button switches
the function to the next available function. Each function will have a unique
identifier. See Functions in Section 6 for detail on the functions included.
3.3 Audio
The instrument includes an audible output proportional to the radiation rate and
also to annunciate an alarm if activated within its programmed parameters.
Pressing the audible button momentarily adjusts the volume output sequentially
between OFF and five increasing audible levels before returning to the OFF
position again. An icon on the bottom right-hand part of the screen indicates
how many levels are currently activated and are shown as green bars.
3.4 Ack/Reset
This key is used to acknowledge alarms and to reset functions. Any time an alarm
sounds, users can silence the audible output by pressing the ACK/RESET
button. A second acknowledgement by the user will automatically clear the
message and re-arm the system.
The ACK/RESET button may also be used to reset the current rate reading. If
no alerts or alarms are present, a momentary press of the button will reset the
current rate reading to “0.0”; however, the reading will immediately begin to
update. As a result, the user may never see a “0.0” reading displayed.
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