LUDLUM 70, Системное руководство

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Model 70 System Manual
Ludlum Measurements Inc.
8
May 2021
The top graph in the prior photo shows the graphical profile of the dose rate along with the
current date/time. The second window displays the current dose rate as detected by the
instrument. Using these two windows the user can easily identify the direction to the source as
necessary before the spectrum is acquired and a source ID is performed.
The last box shows the cumulated dose over the time period selected by the user in the setting
screen as described in the parameter setting screen section below.
The cumulated dose bar is in logarithmic scale since cumulated dose threshold is relatively large
in comparison with dose rate. The dose profile, dose rate, and cumulated dose will always be
calculated and displayed when the unit is in the Dose screen. The user can simply
watch the current dose rate and the cumulative dose from Screen 1 without recording.
The neutron detection is shown as N/C, which is neutron counts in a one-minute running
average.
Saving Dose
The instrument can save up to 24 hours of dose rate records.
To begin recording the dose time profile from Screen 1, the user can press the START (Up
arrow) button. The dose rate time profile is recorded into memory for the pre-set time as
selected in the settings window (default is 60 sec). The red circle (recording) will appear in the
right upper corner of the display with recording time remaining in the format “hh:mm:ss.”
1. The user can stop recording at any time by pressing CANCEL/SET (Down arrow). After
stopping recording, the following tips will appear at the bottom of the screen:
Resume ,
Save , and Cancel . The tips are assigned over each of three buttons accordingly for
further actions:

Pressing ENTER/SAVE will save the current dose recording (the unit
will automatically assign the file name).
Save Dose - ENTER/Save
Cancel Save - Cancel/Set
Resume Dose - Start