Target F501 User manual

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User Manual
20.23.4 (20231207-3902)
Target F501

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The Hardware
1 2 3 4
1. Battery cover
2. Operating keys
3. Display
4. Power On / Loading Indicator
1 5 6 7 8
5. Serial number
6. Detector label
7. Detector positioning marks
8. USB-socket
Instrument Safety
The Target F501 uses scintillation crystals to detect gamma radiation. There are versions of the Target F501 with
different detectors:
BGO (Bi Ge O (Gd O ))
NAI (NaI:Tl)
NAICN (NaI:Tl with capture neutrons)
NAIL (NaIl)
CLLBC (Cs LiLa(Br, Cl) :Ce)
LABR (LaBr :(Ce, Sr))
All detector crystals, except BGO, are very sensitive to shock.
Furthermore, the Target F501 has sensitive electronics and should therefore also be handled with care and never
dropped.
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Unpacking and Identifying Accessories
The Target F501 comes in a custom fi t transport case with a
set of the following accessories:
1x Lanyard
1x Belt Holster
2x USB Cable
1x USB-C Charger
2x Battery Pack PM18650
Check the parts and components received. If anything is missing, contact support.
We recommend charging the Target F501 battery modules after unpacking and before first use.
Spare Parts
Battery Pack PM18650 4210014
Battery Holder PM1 Cargo 4212836
Case and Foam 4213734
Case Label 4213732
Holster 4209891
USB-A / USB-C Cable 4202304
USB-C / USB-C Cable 103429
O-Ring 40x1.5 NBR 70A 4213725
UGREEN PD Fast Charger CD137 20 W USB-C 4213398
Synthetic O-Ring Grease 1ml 4214141
Wrist Strap 100034
4 mm Ring 103787
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The Power Modules
There are different types of power modules available for the Target F501.
PM18650
1 2 3 4 5 6
The PM18650 is a rechargeable Lithium-ion power module.
1. Housing
2. Contact plate
3. USB power socket
4. State of charge LEDs (4)
5. Test button
6. Status LED
To check for the state of charge of the power module press the test button. The four state of charge LEDs will indicate the
remaining battery capacity.
         75 - 100 % state of charge
         50 - 75 % state of charge
         25 - 50 % state of charge
         10 - 25 % state of charge
         below 10 % state of charge
         A fast flashing status LED means, that the state of charge of this power module is too low to be used in a
Target F501.
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To avoid damage through deep discharge recharge empty power modules within one month.
The power module PM18650 has no serviceable or removable parts inside. Under no circumstances should the
housing be tampered with, penetrated, or otherwise removed.
Do not short-circuit the battery contacts and do not place the power modules with the contact board on a metallic
surface. Batteries may be damaged by a short-circuit.
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PM1 Cargo
1 2 3 4
The PM1 Cargo is a holder for four commercially available
AA batteries.
1. Housing
2. Contact plate
3. AA battery cells
4. Front label
Compatible AA batteries are:
1.5 V Lithium/Iron Disulfide such as Energizer® Ultimate
Lithium ™ or equivalent. Energizer® Ultimate Lithium ™ is
a registered trademark of Energizer Brands of St. Louis,
Missouri.
1.2 V Nickel – metal hydride (NiMH)
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Always replace all four battery cells with fresh ones. If you do not want to use the freshly assembled battery module
immediately, place a strip of non-conductive plastic, which is easy to remove, between the contact of a battery and the
contact surface in the battery holder.
If NiMH batteries are used in the PM1 Cargo, they must be charged in an external, commercially available charger. If the
Target F501 is operated with a PM1 Cargo, it cannot be operated permanently with a USB power supply unit.
Don't use 3.6V Lithium batteries.
The use of alkaline batteries is not recommended, as they only have a runtime of 10 minutes and can become very hot
inside the Target F501.
Don't mix different types of batteries.

Do not short-circuit the battery contacts and be careful when placing the power modules somewhere with the contact
plate pointing downwards. Batteries may be damaged by a short-circuit.
Exchange Power Modules
In order to exchange the power module shut down the Target F501 fi rst.
Open the battery compartment
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Change the power module Close the battery compartment
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Hold the Target F501 with one hand and with the other hand turn the battery lid counterclockwise for about 20° degrees. Pull
off the battery cover and tilt the instrument until the battery module slides out. Insert a fresh power module with the contact
plate pointing to the instrument. Put on the battery lid and turn it clockwise until the dots on the housing and on the lid are
in line.

When the battery compartment is opened, always inspect the sealing rings. Make sure that the seals are sufficiently
lubricated. In case of any damage replace the sealing ring with a new one.
USB Charger
The charger included is a PD Fast Charger CD137 from UGREEN with Power Delivery 3.0.
 UGREEN Declaration of Conformity
Recharging of the PM18650

To charge the PM18650, connect the USB plug of the wall charger to the USB socket of the battery module. The status LED is
flashing slowly while charging, the four LEDs indicate the battery state of charge.
         The power module has a state of charge between 10 % and 25 % and is charging
         The power module has a state of charge of 100 %, charging has stopped
         A fast flashing status LED indicates that the temperature of the battery is too low or too high to charge.
The battery modules can be charged with any commercially available USB charger with USB-C connector.
Recharge the PM18650 inside the Target F501
You can charge a power module inside the Target F501
without opening the battery compartment.
Open the cap of the USB socket on the top of the Target F501
and connect the supplied USB charger.
A slowly flashing (0.6s in 1s) power indicator above the
display of the Target F501 indicates the active charging
process.
The power indicator LED is lit continuously after the
charging has stopped.

A slow but short flashing (0.1s in 1s) of the power indicator indicates that the power supplied by the charger is lower
than the power consumption of the Target F501 which means that the charge of the battery continues to decrease,
albeit at a slower rate. However, USB-C chargers usually provide enough power to run the Target F501 endlessly this
way.

A fast flashing status LED indicates that the temperature of the battery is too low or too high to charge.

The power module inside the Target F501 does not charge, when the Target F501 is connected to a PC. This connection
can only be used for communication, not for charging.
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Storage of the power modules

Power modules have to be charged before storing. Empty power modules should not be stored longer than a month,
after this time the batteries may be damaged by self-discharge. Full power modules have to be recharged after one
year of storage.
Starting the Target F501
1. Check the battery
(see the battery chapter for details)
2.
Press the power button
 A fast flashing power-on-indicator means that the battery state of charge is too low and the Target F501 will not
start.
3. Wait. This may take up to 60 seconds.
While the home screen is displayed with the company logo, the Target F501 loads its software and performs a self-test
until the dose rate screen is displayed.
4. The Target F501 is stabilizing
In the first seconds after that, the stabilization of the Target F501 is initialized in the background. The progress of the
stabilization is displayed as a bar below the status bar. The Target F501 is fully functional during stabilization.
Press the power button... The Target F501 is stabilizing and fully
functional.
The Target F501 is stabilized and fully
functional.
The Target F501 is usually operated with the hardware buttons and the on-board user interface, but it can also
be operated via the web interface. Please refer to the appropriate chapters for more information.
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0.523
µ Sv/h
1 µ Sv/h
No Neutrons
Dose Rate
09:44
Finder
Identify
Menu
0.558
µ Sv/h
1 µ Sv/h
No Neutrons
Dose Rate
09:44
Finder
Identify
Menu

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Shutdown and Standby
When the Target F501 is switched on, the power button has two different
functions:
1. Standby
A short press of the power button will instantly put the Target F501 in
sleep/standby mode.
There are some situations, in which it is not possible to switch to the standby
mode, i.e. active alarms, running identifications.
In standby mode, the display and other power consuming hardware are
switched off to save as much power as possible, without switching the
instrument off completely. When the gamma value approaches the set
threshold for a gamma alarm, the standby mode is automatically terminated.
Press the power button again and the Target F501 wakes up instantly showing
the most recent screen.
2. Shutdown
To shut the Target F501 down press the power button until the shutdown screen
appears. Press Yes to switch off the Target F501 or No to cancel the
shutdown process.
Shutdown?
Shut Down
09:44
Yes
No
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The User Interface
User Interface - Web Interface
When we talk about the user interface in this manual, we always mean the interface of the Target F501 itself, with the four
hardware buttons and the 800 x 480 pixel color display as opposed to the web interface, which is displayed in a browser on a
connected computer.
Routine Mode
The user interface has no restricted areas, every screen and menu on the instrument is accessible for every operator and
represents as such the routine mode of the Target F501.
Expert Mode
If you need to make more extensive changes to the instrument, access the nuclide library, or download N42.42 files from the
Target F501, you will need to connect a computer and switch to the web interface. See chapter: Web Interface
In addition to generally accessible pages, there is a password-protected area that contains the sensitive setting parameters
that should only be changed by experts.
Screens and Pages
To be able to distinguish the sections in this manual, we talk about screens when we describe the different modes of the
user interface as opposed to pages when we describe the different web pages of the web interface.
Every screen of the user interface is vertically divided into three main parts:
1. On top: the status bar
2. In the middle: the main content of the different screens
3. At the bottom: the button bar
The Status Bar
The status bar shows all status information of the current status of the Target F501.
1. The title of the current screen.
2. The time of the instrument.
3. A set of icons, that indicate the status of:
Gamma and Neutron Alarms
Active Gamma Alarm
Active Neutron Alarm
Active Gamma and Neutron Alarm
X-Ray Filter
Some variants of the Target F501 are equipped with software that can filter an active X-ray beam and ensure valid
measurements and identifications in an environment where the sample is being X-rayed.
X-ray filter is switched on but no x-ray beam was detected
X-ray filter has detected an x-ray beam and is scanning the frequency
X-ray filtering is active
Muted Alarms
Alarms are muted
Title
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Stabilization
The initial stabilization progress is at 75 %.
The stabilization is invalid or not present.
The Target F501 is perfectly stabilized
GPS
GPS is switched off
GPS is switched on, but has no fix
GPS is switched on and has a fix
Bluetooth
The Target F501 is not paired with a Bluetooth device
The Target F501 is paired with a Bluetooth device
Wi-Fi
Wi-Fi is switched off
Wi-Fi access-point is switched on
Wi-Fi access-point is switched on and a device is connected
Wi-Fi is switched on and connecting
Wi-Fi is switched on and connected to a network with good signal strength
Flight-Mode
Flight-mode is switched off
Flight-mode is switched on, Bluetooth and Wi-Fi are switched off
Power Supply
The battery is empty; the instrument will shut down very soon
The battery state of charge is under 10 %
The battery is full
The Target F501 is connected to a power supply and charges the battery
The Target F501 is connected to a power supply and the battery is fully charged
The Target F501 is powered by a battery adapter and an external power supply
Title
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Title
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Title
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The Button Bar
The button bar contains the graphical counterpart of the hardware buttons.
The button bar on the bottom of every screen is divided into three parts. Each part represents the visual software
counterpart of the hardware keys near it.
Upside orientation Example with two active buttons Upside down orientation
The software buttons are labeled with a short text which describes the function of the button on the respective screen. On
some screens, not all buttons have a function, software buttons with no function do not show up in the button bar.
Values And Units
Left Button
Middle Button
Right Button
0.558
µ Sv/h
1 µ Sv/h
1.23
cps Neutrons
Dose Rate
09:44
Finder
Identify
Menu

Background Measurement
Move away from all
radioactive sources.
Identi fi cation
09:44
Continue
Cancel
0.558
µ Sv/h
1 µ Sv/h
1.23
cps Neutrons
Dose Rate
09:44
Finder
Identify
Menu
Decimal separator
All values are displayed in localized form according to the set language. This means, for example, that if the user and
web interface language is set to US English, the decimal separator is a dot.
If the language is set to e.g. German, the decimal separator is a comma.
Dose Rate Unit
The dose rate values can be displayed in Sv/h* (ambient dose equivalent Ḣ *(10)), Sv/h (exposure rate) or rem/h
(exposure rate). Dose rate in Sv/h as Ḣ *(10) are displayed everywhere as Sv/h*.
Further information on ambient dose equivalent Ḣ *(10): electropedia.org

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Dose Rate Screen
The dose rate screen displays the current dose rate and the neutron probability.
A typical dose rate screen with a threshold of 25 µ Sv/h and the dose rate unit set to Sievert.
Dose rate value and unit
The Target F501 can display a dose rate range from 0.01 µ Sv/h up to 1 Sv/h. (0.001 mrem/h up to 100 rem/h).
The dose rate unit can either be Sv/h*, Sv/h or rem/h. The Target F501 scales the respective units automatically.
If set to Sv/h* or Sv/h the dose rate / unit schema looks like this:
0.001 - 999.9 µ Sv/h
1.000 - 9999 mSv
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If set to rem/h the dose rate / unit schema looks like this:
1 - 999 µ rem/h
1.000 - 999.9 mrem/h
1.000 rem/h - ...
The dose rate unit can be changed in the expert settings of the web interface.
Dose rate screen with a dose rate
above the threshold.
Dose rate screen with a high dose rate
and a neutron alarm.
Dose rate screen with a dose rate that
exceeds the main dose rate bar.
The combined dose rate bar
The Target F501 combined dose rate bar is intended to provide the operator with an easy to read and unambiguous indication
of the measured dose rate under all lighting conditions. The combined dose rate bar consists of two separate bars:
Full Range Bar
A narrow bar at the top showing the full dose rate range of the Target F501.
Main Bar
Below this, a wider bar displays the gamma dose rate with the preset dose rate alarm threshold at 2/3 of the display
width.
Gamma Alarm Threshold
The currently set value of the dose rate alarm threshold is displayed at the corresponding position of the bar.
(The dose rate alarm threshold can be changed in the expert settings of the web interface.)
Both bars are logarithmically scaled, thin lines indicate the orders of magnitude.
The color of the bars change according to the dose rate and dose rate alarm threshold.
3.445
µ Sv/h
25 µ Sv/h
1.23
cps Neutrons
Dose rate value and unit
Full range dose rate bar
Main dose rate bar
Alarm threshold
Neutron count rate bar and value
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12.48
µ Sv/h
10 µ Sv/h
1.23
cps Neutrons
152.3
µ Sv/h
10 µ Sv/h
3.23
cps Neutrons
2.456
mSv/h
10 µ Sv/h
1.23
cps Neutrons

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Full Range Bar
The full range bar has a color gradient depending on the dose rate alarm threshold. For dose rate values beneath the
alarm threshold the bar is colored green, for values around the alarm threshold the bar changes to yellow and then to red
the more the dose rate gets above the threshold.
Main Bar
The main bar is colored monochrome. The bar changes its overall color according to the dose rate value and dose rate
alarm threshold similar to the full range bar.
If the dose rate value exceeds the alarm threshold, the main bar reaches into the last third of the screen, the warning area.
In situations with very high dose rates and/or a low alarm threshold, the main bar can exceed the width of the instrument
screen. In such a case the operator still has the visual feedback of the full range bar with the recent alarm threshold and
dose rate within the full dose rate range of the instrument. (Note that the dose rate value is always also displayed with
numbers and unit).
The neutron count rate
Although the Target F501 BGO has no extra neutron detector, it is able to calculate neutron cps.
The neutron count rate bar increases as the neutron count rate increases and changes color to blue when the count rate
exceeds the threshold. The same applies to the color of the neutron count rate.
If the neutron alarm display is turned on in the expert settings, the neutron alarm screen is displayed when the neutron
count rate exceeds the threshold.
Finder Screen
The fi nder screen shows the dose rate history with a special threshold and high sensitivity to
help locate radioactive sources.
The finder screen while searching for radioactive sources
Adjusting the fi nder threshold
The finder mode is designed to help the operator with the locating of radioactive sources. This is done by showing a small
history of measurements in the form of bars with a high sensitivity and a special threshold. To adjust the finder threshold,
the Target F501 has to measure the background intensity accurately.
The Target F501 automatically starts this background measurement every time you enter the finder screen. During the first
couple of seconds the background intensity is acquired and the finder threshold is calculated. During this process, the
history bars are grayed out and no threshold area is displayed.
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Gamma cps
1234
Gamma µ Sv/h
2.345
Neutron cps
0.10
Gamma count rate
Gamma dose rate history
Gamma dose rate
Neutron count rate
Neutron count rate history

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Measuring the background intensity Completed background measurement Active neutron alarm
Cancel The acquisition of the background intensity can always be stopped by pressing the Cancel button, which leads to the
dose rate screen.
Skip If an earlier background measurement exists, you can also Skip the background acquisition and use the former
threshold.
This gives you the flexibility you need in the field. On the one hand, you can move on quickly to continue searching for
sources, or on the other hand, if you have reached an area of higher radioactivity and all the history bars are above the
threshold, you can simply run a new background analysis by exiting and re-entering the Finder screen.
At the end of the background measurement the bars turn green and the warning area above the threshold appears.
Locating radioactive sources
When the background measurement is completed you can start to search for radioactive sources. Move (sweep) the Target
F501 slowly around and observe the display. When the bars exceed the threshold, verify the measurement and slowly follow
the direction the Target F501 points to at the highest dose rate.
If the bars tend to always exceed the threshold, repeat the background measurement (exit to the dose rate screen then go to
the finder screen again). This should lead to the radioactive source, if there is any, within the shortest time.
Identify Screens
The identi fi cation process can take different lengths of time depending on the setting in the
expert settings and may consist of several different measurements.
Depending on the setting, the following screen pages may be displayed in the user interface during an identification:
Identify Prepare Screen
Instructions for the background or calibration measurement
Identify Measurement Screen
Measuring background, calibration and foreground
Identify Result Screen
Displaying the identification result.
Identify Menu Screen
Menu of spectra and reachback options for the identification result
Gamma cps
1234
Gamma µ Sv/h
2.345
Neutron cps
0.10
Gamma cps
1234
Gamma µ Sv/h
2.345
Neutron cps
0.10
Gamma cps
1234
Gamma µ Sv/h
2.345
Neutron cps
1.10

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Identify Prepare Screen
The screen for preparing a measurement is displayed, for background or calibration
measurements.
Depending on the identification settings a single identification can be a process of up to three different measurements.
Background
With this measurement the background radiation of the location will be determined. Make sure that the instrument is not
exposed to any other radioactive source.
Calibration
This measurement uses a known source to do a calibration measurement in order to document the quality of the
measurement results. Get your check source and place it close to the instrument.
Foreground
This is the measurement to which the "Background" measurement and "Calibration" measurement are actually assigned. If
no "Background" or "Calibration" measurement is selected in the expert settings the measurement starts without a
preparation screen.
Continue Pressing Continue starts the respective measurement.
Cancel Pressing Cancel leads back to the Dose Rate screen. All previous measurements made during this identification
process will get lost
Identify Measurement Screen (Preparation)
The screen shows up during a Background or Calibration measurement.
When the measurement is finished the next step in this identification process will be displayed.
Cancel Pressing Cancel leads back to the Dose Rate screen. All previous measurements made during this identification
process will get lost.

Background Measurement
Move away from all
radioactive sources.
Type of Measurement
Instructions for the measurement type
Gamma cps
1234
Gamma µ Sv/h
0.529
Neutron cps
0.20
Background
Gamma counts per second
Measurement Progress
Dose Rate
Measurement Type
Neutron count rate
Live-Spectrum

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Identify Running Screen
The identify running screen shows up during an identi fi cation with the most important
information on the progress of the identi fi cation.
This screen shows an identification at 75% of progress time with a count rate of 1289 cps.
The Identi fi cation Process
To provide reliable identification results in the shortest possible time, we recommend having the Target F501 calculate the
time for an identification based on a value we call ID statistics. The value of ID statistics depends on the internal physics of
the Target F501 and the external conditions during an identification and cannot be changed. However, in the expert settings,
the ID statistics can be scaled by a factor of up to 20. A value of two for ID statistics means that the statistical basis for an
identification is doubled. Under identical circumstances, this doubles the time for an identification. The expert settings
alternatively offer the possibility to set a fixed time for identification.
When the identification process is finished the Target F501 will automatically switch to the identify results screen.
Low Count Rates
The Target F501 requires a minimum count rate to perform reliable identification.
If the count rate is too low, the background color of the gamma count rate will turn yellow. If the count rate is constantly too
low during the identification process, the identification result will most likely be "NORM".
Cancel During an identification, the operator can cancel the identification, which brings him back to the Dose Rate screen.
All previous measurements made during this identification process will get lost.
Identify Result Screen
The identify result screen displays the results of an identi fi cation.
The identification result screen with a single identification.
Gamma cps
1289
Gamma µ Sv/h
0.543
Neutron cps
0.20
Gamma counts per second
Measurement Progress
Dose Rate
Neutron count rate
Live-Spectrum
Strontium-82
9
MED
Confidence
Usage
Severity
Nuclide name

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The Identi fi cation Result
The Target F501 displays up to four identified nuclides. If the identification result contains more than one nuclide, the
nuclides are sorted by confidence and nuclide name. If the Target F501 cannot identify a nuclide "No Identification" is
displayed. Each identification result is automatically stored with a consecutive number in the Target F501. If an identification
setting with a background and/or reference measurement was made before this foreground measurement, all results are
combined in a single .n42 file. The title of the screen in the status bar shows the consecutive number of the identification
result. You can search all identification results stored in the device via the web interface.
Display Options
These options can be switched on or off in the expert menu of the web interface.
Con fi dence
The confidence of an identified nuclide is an indicator of the quality of the measurement.
The reliability can take values in a range between 0 and 10, where higher values mean greater reliability. A 10 means that
the result is correct without any ambiguity.
Usage
The category Usage is an indicator that shows the main purpose of the respective nuclide, as there are:
IND - industrial use
NORM - natural occurring radioactive material
MED - medical use
SNM - special nuclear material
NUC - use in nuclear facilities
Severity
Severity is displayed as an icon and shows the threats of a possible abuse of the respective nuclide.
Innocent
Suspicious
Threatening
Extend the Identi fi cation
There may be reasons or instructions to extend the identification time.
Extend Pressing Extend adds another identification run.
The identification result will be done based on the data of the first measurement plus the data of the extended
measurement. This procedure can be repeated as long as you want. With regards to the database, a new entry is generated,
in which the former foreground identifications are tracked with their start and stop times. The spectra are summed and the
identification is based on this sum.
Result screen with one identification
result
Result screen with two identification
results
The same result without classification
and confidence indicators
Open the Identi fi cation Menu
Menu To display the spectra of the measurement or choose one of the reachback options, press the Menu button and select
one of the available menu entries.
Strontium-82
9
MED
Strontium-82
10
MED
Thorium-232
8
NORM
Strontium-82
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Thorium-232
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Identify Menu Screen
The identi fi cation menu screen displays the spectra and reachback options of the
identi fi cation.
Available spectra for this identification
Available Spectra
Related to every identi fi cation the Target F501 saves three different spectra to the internal database.
a. 3 MeV Spectrum : The 3 MeV spectrum is stabilized and linearized.
b. 10 MeV Spectrum : The 10 MeV spectrum is stabilized but not linearized.
c. 512 keV Spectrum : The 512 keV spectrum is stabilized and linearized.
Reachback Options
Send Identi fi cation
Send the .n42 file of the identification with a connected mobile or a sat phone to one or more email recipients.
Navigating this Menu
 Next The Next button activates the next menu entry. The next menu entry is the entry underneath the active entry. If the
bottom end of all menu entries is reached, the selection starts on the top again.
Navigate 
The Navigate button displays the selected spectrum screen.
 Back The Back button takes you back to the identification result screen.
Identify Spectrum Screen
The spectrum screen displays the selected spectrum of a measurement.
A 3 MeV spectrum.
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Remember that the 10 MeV spectrum is not linearized. All spectra are scaled logarithmically on the y-axis.
 Back The Back button takes you back to the menu with the list of available spectra of the last identification
measurement.
3 MeV Spectrum
10 MeV Spectrum
512 keV Spectrum
Send Identi fi cation
Other available spectra
Selected spectrum
Reachback Options
Spectrum area
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Send Identi fi cation Screen
The send identi fi cation screen displays a list of connected devices that can be used for
reachback.
Choose a menu entry.
 Next Press Next to choose one of the listed entries.
Send If a mobile phone is selected, press Send to send the .n42 file of the identification to a list of recipients. The Target
F501 uses the smartphone to connect to the internet via Bluetooth-Tethering and takes the operator settings (Email Server,
Email Username and Email Password) to email the Email Recipients.
If a sat phone is connected to the Target F501 the respective menu entry becomes active and selectable.
Send Pressing the Send button behaves in the same way as with a connected smartphone.
Add Select "Add Bluetooth Device" and Press Add to pair the Target F501 with a yet not known Bluetooth device.
 Back The Back button takes you back to the menu of the last identification.
Phone 1
Phone 2
Satellite Phone
Add Bluetooth Device
List of paired phones
Satellite phone (active if available)
Add other Bluetooth devices

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Main Menu Screen
The menu screen shows a set of available functions.
The menu screen with all entries
Navigating the Menu
 Next The Next button activates the next menu entry. The next menu entry is the entry underneath the active entry. If the
bottom end of all menu entries is reached, the selection starts on the top again.
The center button can have different states depending on the menu entry.
Menu Entry Center Button Action
Operator Settings
Navigate 
Help for the Operator Settings Screen
Date/Time Settings
Navigate  Help for the Date/Time Settings Screen
Easy-Finder
Navigate  Help for the Easy-Finder Screen
Event Counter
Navigate  Help for the Event Counter Screen
App Pairing
Navigate  Help for the App Pairing Screen
Known Bluetooth Devices
Navigate 
Help for the Known Bluetooth Devices Screen
Wi-Fi Access Point
Navigate  Help for the Wi-Fi Access Point Screen
Wi-Fi Connection
Navigate  Help for the Wi-Fi Connection Screen
Calibration Check
Navigate  Help for the Calibration Check Screen
Annunciator Test Activate Initializes a sound and a vibration pattern.
General Information
Navigate 
Help for the General Information Screen
 Back The Back button takes you back to the former screen.
Date/Time Settings
Easy-Finder
Event Counter
App Pairing
Known Bluetooth Devices
Wi-Fi Access Point
Selected menu entry
Other menu entries