Ludlum Measurements 702i User manual

LUDLUM MODELS
702i and 711i
ISOTOPE IDENTIFIERS
December 2018
Serial Number ID001000 and Succeeding
Serial Numbers

LUDLUM MODELS
702i and 711i
ISOTOPE IDENTIFIERS
December 2018
Serial Number ID001000 and Succeeding
Serial Numbers

Model 702i Isotope Identifier

STATEMENT OF WARRANTY
Ludlum Measurements, Inc. warrants the products covered in this manual to be free
of defects due to workmanship, material, and design for a period of twelve months
from the date of delivery. The calibration of a product is warranted to be within its
specified accuracy limits at the time of shipment. In the event of instrument failure,
notify Ludlum Measurements to determine if repair, recalibration, or replacement is
required.
This warranty excludes the replacement of photomultiplier tubes, G-M and
proportional tubes, and scintillation crystals which are broken due to excessive
physical abuse or used for purposes other than intended.
There are no warranties, express or implied, including without limitation any implied
warranty of merchantability or fitness, which extend beyond the description of the
face there of. If the product does not perform as warranted herein, purchaser’s sole
remedy shall be repair or replacement, at the option of Ludlum Measurements. In no
event will Ludlum Measurements be liable for damages, lost revenue, lost wages, or
any other incidental or consequential damages, arising from the purchase, use, or
inability to use product.
RETURN OF GOODS TO MANUFACTURER
If equipment needs to be returned to Ludlum Measurements, Inc. for repair or calibration, please
send to the address below. All shipments should include documentation containing return shipping
address, customer name, telephone number, description of service requested, and all other necessary
information. Your cooperation will expedite the return of your equipment.
LUDLUM MEASUREMENTS, INC.
ATTN: REPAIR DEPARTMENT
501 OAK STREET
SWEETWATER, TX 79556
800-622-0828 325-235-5494
FAX [phone]

Table of Contents
Introduction 1
About your Model 702i/711i Unit 1-1
Caution Statement 1-1
Getting Started 2
Basic Operation 2-1
Menu 2-2
Description of Keypad and Soft Keys 2-2
Display Conventions 2-3
Self-Test and Data Screen 2-4
Choosing User or Administrator Operation 2-5
Software 2-6
Connections 3
Connecting AC Power or a Car Adaptor 3-1
CompactFlash Card 3-1
Batteries 3-2
Ethernet Connection for Data Output 3-3
Specifications 4
Safety Considerations 5
Cleaning Instructions and Precautions 5-1
Warning Markings and Symbols 5-1
Recycling 6
General Operation 7
Turning the Unit On and Off 7-1
Search Modes 7-1
Audible Search Setting 7-5
Taking a Background 7-5
Identifying Sources of Radiation 7-7
Analysis Report 7-8
Storing, Reviewing and Retrieving Spectra 7-9
Manual Calibration 8
Coarse Calibration 8-1
Dose Rate and Fine Energy Calibration 8-3

System Menus 9
Introduction 9-1
Run a Procedure/Display Information/Open Submenu 9-2
Check Option On or Off 9-2
Adjust Slider 9-2
Select Among Options 9-3
Isotope List 9-3
Edit Numeric Value 9-4
Edit Date for Filter 9-5
User Menus 9-5
Field Settings 9-5
Spectral Data 9-8
Configuration 9-10
Help Menu 9-11
Administrator Menus 9-12
Configuration (Extra Items) 9-12
Admin 9-13
Factory Settings 9-17

Model 702i and 711i Technical Manual Section 1
Ludlum Measurements, Inc. December 2018
1-1
Introduction
About Your Model 702i/711i Unit
The Ludlum Model 702i and 711i units are portable radioisotope identification (RID) systems that
detect and identify multiple nuclides, providing quantified results using time-slice analysis. Both
batteries and the gamma detector are internal, allowing for a compact but sensitive isotope
identification.
The 702i uses a NaI detector, while the 711i uses a LaBr detector. With the LaBr detector, the 711i
provides an extremely high resolution for 137Cs at 661 keV of 3.5 to 5%. This means a higher
confidence level of isotope differentiation and identification.
The instruments can be operated either in a very simple mode requiring no previous experience or in
other operating modes that take advantage of the comprehensive set of advanced features.
The Model 702i and 711i units offer two log-on modes: User and Administrator. The User
functions allow first-line responders to perform all the tasks needed in the line of duty. The
Administrator functions allow a health physicist, or other expert, to set up the device for specific
applications and to perform additional maintenance functions. This manual will cover aspects of
both, but places an emphasis on User functions.
CAUTION! It is important to limit access to Administration Mode to those who are
qualified to use it. This mode includes the advanced functions of the instrument and
allows the user access to everything. The general user should be limited to User
Mode only. If any of the advanced functions are altered incorrectly, it could affect the
overall function of the instrument and may require expensive re-calibration. Please
see Section 2, starting with page 2-5, for details on how to set up the Administration
Mode and protect the mode with a password.
Once you set a password for the Administration Mode, it is important not only to
keep it private, but to not lose it or forget it. If the password is forgotten, it can only
be reset by the factory.
In addition, do not alter calibration settings, or it may incorrectly alter the
instrument’s functions and require repair by the factory.
After logging on, the device powers up in an initial search mode. Several different views of this
mode are available, but all are based on data collected in real time. In addition to the search modes,
setup, alarm review, and calibration functions can be accessed through the menu system.
The instrument has a simple user interface and a wide range of setup functions and utilities.
Section
1

Model 702i and 711i Technical Manual Section 1
Ludlum Measurements, Inc. December 2018
1-2
The Model 702i or 711i unit can be connected to a remote computer using an Ethernet cable, and
accessed with either Quantum™ MCA (standard) or Quantum™ Gold (quantitative analysis)
software. The Quantum™ software allows:
Up to eight MCAs to be controlled at one time, with full spectrum data in real time.
Model 702i or 711i unit analysis in 256 QCC or linear, 512 QCC or linear, and 1024 linear
modes.
Note that if you are using either the Model 702i or 711i unit without a PC, operation is limited to
256 and 512 QCC, including the saving of spectra. However, while under control of Quantum
software, all ADC modes (including 1024 linear) are available.
The basic Model 702i or 711i unit consists of:
The spectrometer electronics
Internal gamma ray detector
An AC power adapter
Optional devices include:
Quantum software
A car power adapter

Model 702i and 711i Technical Manual Section 2
Ludlum Measurements, Inc. 2-1 December 2018
Getting Started
Turn on the Model 702i or 711i unit by holding down the power key (which is also the BACK key)
until the status screen appears. Press ENTER to move to the log-in screen, and then press ENTER
() again to advance to the user-mode search screen (generally Dial). At the bottom of the screen
there will be a message indicating auto calibration is in progress. This may take one to three minutes.
The instrument is then ready for use.
Basic Operation
Refer to the following screen drawing, where three soft keys will be seen (Identify, Background,
Finder). These are accessed by the LEFT () or RIGHT () arrow keys and then pressing ENTER.
The far right soft key allows the user to select between the available search modes. The Dial and
Finder screens are the simple modes of operation where the Dial gives count rate information in the
form of a speedometer. When radioactive material gives an indication in the green region, this
signals proper source intensity for identification with gamma count rate. The other colored regions
indicate the source is too far (gray) or too close (red). The Finder mode allows location of the
source by displaying intensity vertically and time horizontally. The midscale “ID” shows the proper
intensity for identification. In addition, an audio signal can aid in finding the source. The other two
search modes (Bars and Spectrum) are more advanced and must be enabled in the administrator
menu. These two screens allow the user to view isotopes in the form of vertical “Bars” or a
“Spectrum,” where the isotope is identified or its presence is seen in real time. These modes also
give isotope category and dose rate in real time.
Identification may be performed in any one of the four modes. Simply highlight the Identify soft
key and press ENTER. A report appears after the acquisition period. Isotopes identified are shown
with a statistical confidence number ranging from 0 to 100%. This is based on source strength,
length of acquisition, number of energy lines, and statistical factors. The default for taking a
background or acquiring a spectrum is one minute. The length of acquisition can be increased or
decreased by pressing ENTER when the soft key is on ±30 seconds. If ENTER is held down, the
length of time can be changed rapidly. Pressing the BACK key allows the user to return to the search
modes. Holding down the BACK / power key for a count of three seconds turns the instrument off.
Section
2

Model 702i and 711i Technical Manual Section 2
Ludlum Measurements, Inc. 2-2 December 2018
Menu
Coarse calibration, review of stored spectra, thresholds, and many other features can be accessed
from the user or administrator (password protected) menu. The menu can be accessed from any
one of the search modes.
Description of Keypad and Soft Keys
Figure 1 shows a rendering of the Model 702i keypads. Some of the keys are located underneath the
display, while the most commonly used keys are located on the handle.
Figure 1 –Model 702i Keypad
The following is a brief description of the seven keys and how they are used.
BACK/ Returns to previous screen, exiting from menu or report. This key is also used to
turn system power on and off.
MENU Enters the menu system from any search screen.
ENTER Used to select currently highlighted option, such as a soft key or a menu item and
also used to continue to next step of multi-step processes.
and These keys will be referred to throughout the text as LEFT and RIGHT. They are
used to select among the soft-key options or menu tabs, to move backward and
forward in a string entry process, to select among items in a menu choice process,
and for various other applications that will be described later in the document.
and These keys will be referred to as UPand DOWN. They are used to scroll among
menu items, to scroll through reports, to change the current letter when entering a
string such as a password, and for various other applications that will be described
later in the document.

Model 702i and 711i Technical Manual Section 2
Ludlum Measurements, Inc. 2-3 December 2018
Many of the common operations of the Model 702i or 711i are performed using “Soft Keys.” These
are represented by a set of words in a gray bar shown at the bottom of the screen. In Figure 2, the
normal soft keys seen in the “Dial” search screen are shown. The Identify soft key is currently
selected. By pressing the LEFT and RIGHT keys, you can move the highlighting among the other
soft keys, Background and Finder. Pressing the ENTER key will perform the action specified by
the currently highlighted soft key, for example, entering the identification mode to collect, report,
and store an analysis of a possible radioactive substance.
Figure 2 - Example of Soft Keys
Display Conventions
In order to make the Model 702i or 711i more friendly and easy to use, we have defined several
color and layout conventions for the user interface.
Four different nuclide “classes” are defined by their colors, which appear as labels and as
filled-in areas in spectra. Blue is for industrial (IND), magenta for special nuclear materials
(SNM), cyan for medical (MED), and green for naturally occurring radioactive materials
(NORM or NRM). In addition, when there is insufficient data to be sure something is
present, it will be marked in yellow for uncertain (UNC). When there is something definitely
present but not matched to any currently enabled nuclide, it will be labeled in red for
unknown (UNK).

Model 702i and 711i Technical Manual Section 2
Ludlum Measurements, Inc. 2-4 December 2018
In other contexts, red is used to signal bad conditions (dead battery, calibration failure,
dangerous dose rate); yellow and orange indicate concern (battery nearing end of life,
calibration incomplete); and green indicates everything is normal (battery good, calibration
done, OK to ID).
Soft keys are always displayed at the very bottom of the screen in shades of black and white.
In most cases, where possible, small arrows are shown on the currently selected item to
indicate possible choices. For example, on a selected menu tab, you can go LEFT or RIGHT
or DOWN into the menu. For some menu items, you may be able to use LEFT and RIGHT to
change the value. Two examples are shown here.
Different colors are used to group the items in each of the main menus. All sub-menus (the
menus that come up within an operation selected from the menu system) are displayed in
shades of gray and white. The shading serves to remind you that if you exit from this menu
with the BACK key, it will only take you back to the higher level menu.
Self-Test and Data Screen
When the Model 702i or 711i unit is first powered on, you will see a screen that shows the results of
an initial power-on self test, or “POST.” A properly functioning unit will have a display similar to
that shown in Figure 3. The internal case temperature may vary, and your estimated battery life will
change as batteries are charged and discharged. Press ENTER to continue to the log-in screen.
Figure 3 - Successful POST Screen

Model 702i and 711i Technical Manual Section 2
Ludlum Measurements, Inc. 2-5 December 2018
Choosing User or Administrator Operation
Immediately after the self-test screen, a log-in screen appears, as shown in Figure 4. On this screen
you have the option of logging in as the User or Administrator. The User functions allow first-
line responders to perform all the tasks needed in the line of duty. The Administrator functions
allow a health physicist or other expert to set up the device for specific applications, and to perform
additional maintenance functions.
1
The User mode can generally be accessed without a password,
while the Administrator mode requires a password to be entered.
Figure 4 –Log-in Screen with User Selected
Figure 5 –Log-in Screen for Administrator with Password
1
These modes are designed to comply with ANSI N42.34 Routine and Restricted modes and IAEA Pub
1240 Easy and Expert modes.