FujiFilm NSN3 User manual

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Revised on February 2018
Instruction Manual
Neutron Survey Meter
Model: NSN3
Type: NSN31045-111YY-S

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Preface
Thank youforpurchasingtheFUJIELECTRIC’sNSN3 NeutronSurveyMeter.This
Manualdescribestheoperation,functionandpartsoftheNeutronSurveyMeter.Please
readthis Manualcarefullytoensurethe correctoperationbeforeuse.
Incaseof a productfailure, please contactoursales representativeoragencywith
detailedinformation includingtheinstrumentstatus,sequenceofoperation, Modeland
ProductSerialNumber.Pleaseencloseanypictures ordiagramsin ordertofacilitateour
understandingofthe problem.
Repairingormodifyingbyunauthorizedusermaycauseelectricalshockhazardsor
incorrectoperationandmayavoidwarranty. FUJIELECTRICwill notbe responsiblefor
anydeathsand injuriessustainedduetotheunauthorizedrepair.

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Product Package Contents
Thispackagecontainsthe itemslisted inthetablebelow. Pleaseconfirm beforeuse.
Optional Accessories
Thefollowingoptionalaccessoriesareavailable.Pleasecontactour sales
representativeoragency.
Item
Quantity
Remarks
NSN3 NeutronSurveyMeter
1
OneUSB Connector
Includesabutton-type
battery
InstructionManual
1
DocumentNumber:
WTA529571
TestReport
1
AA AlkalineBatteries
6
ShoulderBelt
1
Item
Quantity
Remarks
ACAdapter
1
12VDC
AA NiMHRechargeable
Batteries
6
TK7P0018P1
BatteryCharger
1
TK7P0017P1
Maintenance Software
1
IncludesUSBCable
Transportationcase
1
Pelican1600
Includesinnermaterials
FiberboardBoxfor
Transportation
1
Includes innermaterials

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For Your Safety
Readthefollowingsafetyprecautionsinordertouse the productsafelyandprevent
personalinjuryandproductdamage.ReadthecompleteInstruction Manualforfurther
informationbeforeusingtheproduct.Pleasenotethatthecontentsof thisManualmay
changeduetothe productmodificationwithoutnotice.
SafetyPrecautions
Attention
- TheNSN3 isaprecisioninstrumentandshouldbehandled with
care.
- Do notdropor subjectthe SurveyMetertoimpact.
- Do notusethe SurveyMeterinan environmentwithorganic
solvents,water droplets, moisture,dust,contaminationand
high-frequencynoise.
- Theinstrument shouldalwaysbe handled withclean, dryhands.
- If itiscontaminated withdirt, cleanthe Survey Meterbywipingit
with adrycloth.

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Safety Precautions
Attention
- Pay careful attention when using itnear thefollowingdevices:
1. Cell phones (aka. Mobile phones)
2. Smart phones(i.e. iPhone, BlackBerry, etc.)
3. PHS handsets
4. High power transceivers (or similar devices)
5. Microwave ovens
6. Radars
7.Weldingmachines
8. Anyother spark dischargingorhigh-intensity, radio-wave
emitting devices
(Note: Keep the instrument at least50 cm awayfrom the PHS
terminals, cell phones and smart phones.)
- When the "low battery" indicator appears, replace old batteries
with the new ones immediately. If you are usingNi-MH
rechargeable batteries, remove and recharge the batteries with
the designated charger. Replace thebatteries when theyare fully
charged.
- Replace primary batteries with standard AAalkalinebatteries.
- To prevent electricalshort-circuit; remove the batteries from the
SurveyMeterfor disposal. Failure to do so maycause excessive
heat generation, rupturing or combustion leadingto personal
death, injury andfire.

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Safety Precautions
Attention
- Safely dispose of used batteriesby following the instructions at
your localgovernment.
- For secondary batteries, use the standard Ni-MH rechargeable
batteries.
- Do not mixthe batterytypes (the standard AA alkaline with Ni-MH
batteries).
- Do not throwthe instrument or batteries into the fire.
- Do not disassemble the instrument.
- For the SurveyMeter disposal,please contact our sales
representativeoragency.

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Material Safety
The NSN3 detectorof contains flammable gas. Follow the attentions below.
Attention
- Flammable gas is used in the Detector.
- Do not use the product near fire.
- Do not throw the product into an open fire.
- Do not expose the product to shock or impact.
- Do not drop the survey meter. As this willdamage thedetectorand
flammable gasmay leak, leading to fire or explosion.
- If you have anyquestions, contactoursalesrepresentative or agency.
Disposal of Electronic Equipment
Dispose this product as an industrialwaste.
Always follow the instructions at your local government regardingwaste disposal.
After dispose this product, please inform our representative or agency.

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CONTENTS
1. General.................................................................................................................................10
2. Parts and Features..............................................................................................................11
2.1 Configuration..................................................................................................................11
2.2 Display Unit.....................................................................................................................16
2.3 Descriptionof the Displays.............................................................................................18
2.3.1 Display(Dose Rate).................................................................................................18
2.3.2 Display(Accumulated Dose)...................................................................................19
2.3.3 USB Cable Connection...........................................................................................20
3. Operation..............................................................................................................................21
3.1 Dose Rate MeasurementandTime Constant Setting..................................................26
3.2Accumulated Dose Measurement.................................................................................30
3.3 Time Setting (Accumulation)..........................................................................................35
3.4 Backlight Setting(Power-Saving Mode)........................................................................39
3.5 "Buzzer" (MonitoringSound)..........................................................................................43
3.6 Trend Data Storage Cycle..............................................................................................46
3.7 Date and TimeSetting....................................................................................................51
3.8 Copying of TrendData...................................................................................................55
3.9 Maintenance................................................................................................................59
4. Maintenance.........................................................................................................................62
4.1 Maintenance and Inspection Procedures......................................................................62
4.2 ReplacementParts.........................................................................................................66
4.3 Battery Replacement......................................................................................................67
5.Time Constant......................................................................................................................69
6.Troubleshooting....................................................................................................................70
7.AppendixA...........................................................................................................................73
7.1 Specifications..................................................................................................................73
7.2 Radiation Characteristics...............................................................................................77
7.2.1 Relative Intrinsic Error..............................................................................................77
7.2.2Energy Characteristics.............................................................................................78
7.2.3 Response forPhoton Radiation..............................................................................80
7.2.4Angular Dependence...............................................................................................81
8.AppendixB...........................................................................................................................83
8.1 Error Code......................................................................................................................83
9.AppendixC...........................................................................................................................84
9.1 CalibrationProcedures...................................................................................................84
10.AppendixD.........................................................................................................................89

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10.1 Packing Method ...........................................................................................................90
10.2Transportationmethod.................................................................................................93
10.3 SpecialPermit...............................................................................................................94

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1. General
Thisequipment is the Portable Neutron Survey Meter, to measure theNeutron Dose
Rate and theAccumulated Dose at Neutron Fields in nuclear facilities or accelerator
facilities. Lightweight and high sensitivityhave beenachieved by adoptingthe organic
mixed gas counter.
The measurement values are displayed on the screen. In addition, the count monitor
beeps and the LED flashes indicatingcounting activity.
The NSN3 operateson six standardAAalkaline or the optionalAANi-MH rechargeable
batteries.AnACAdapteris alsoavailable asanoption.
By using the USB Connector, the data can be transmittedto the PCand the RealTime
Dose Rate andAccumulated Dose are displayed on the PC by utilizing the optional
Maintenance Software.

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2. Parts and Features
ThisSectiondescribes parts andfeatures of the NSN3.
2.1 Configuration
Figure2-1 Configurationof theNSN3
(a) Detector
- Detects neutrons. Pointthe detector to the object to be measured.
(b) Display
- Thescreen displays measurement values and various status.
Attention
Always turn OFF the NSN3 before insertingor extractingthe
Display Unit to avoid incorrect operation.
(i)
(b)
(j)
(h)
(c)
(d)
(e)
(g)
(a)
(f)
(k)
Object to be
measured
(m)
(l)
(2Positions)
(n)
(o)

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(c) Operating Pad
- Use the operatingpad to switch between various functions. Referto the
Section 2.2 for details on displayunit.
(d) Power Switch
- Press down the " | " to turn ON.
- Press down the " O " to turn OFF.
(e) BatteryCompartment
Figure2-2 BatteryCompartment
- Loosen the screwof PointA(shown in Figure 2-2), slide the Battery Cover
upward (in the direction indicated bythe arrow) to remove the Cover. Insert
sixbatteries according to the polarity (+,-) marks inside the Battery
Compartment. Refer to the Section4.3for details on "Battery Replacement".
A
BatteryCompartment
BatteryCover

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Attention
- Always turn OFF the NSN3 before replacingbatteries.
-Insert newbatteries, observingthepolaritymarks (+/-) inside
the Battery Compartment.
- Use onlystandard AA alkaline batteriesorNi-MH
rechargeable batteries.
-When replacing batteries with standard AA alkaline batteries,
use sixnew batteries.
-When replacing the AA Ni-MH rechargeable batteries, use six
fully recharged batteries.
- Always follow the instructions at your local government when
disposingthe used batteries.

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(f) LED (Red)
- Flashes in response todetection count.The Light is continuouslyon when a
high Dose Rate isdetected.
(g) Power Jack
- Use only FUJIELECTRICapprovedACAdapter(optional) designatedforthe
NSN3. Failure to dothis may result ina malfunction or excessive heat
generation.
Attention
Use only the designated charger for rechargingAANi-MH
batteries.WhenrechargingNi-MHbatteries, open thebattery
covershown in Figure 2-2 and remove all the batteries.
Refer to the Section 4.3 fordetailson the "Battery
Replacement".
(h) USB Connector
- The USB Connector is usedfor data transfer. Remove the protecting rubber
cover and attach the optional USB Cable to connect the NSN3 to the PC. Do
not touch the USB Connectoras dirt ordustcould cause transmission failure.
Replace the rubber cover whennot in use to protect the Connectorfrom dust
and water.
(i) Tapped Hole for Tripod
- Screw a commercially available camera tripod into.
(j) Handle
- Use the handle for hand carry.
(k) Screw for Fastening Case Cap
- Unscrewonly at the timeof maintenance. Do not open the case
unnecessarily. The penetrationof foreign materials or waterinto internal
circuit may cause malfunction.

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(l) Shoulder Belt Clasps
- Use the Belt Clasps to join the ends of theShoulderBelt to the NSN3 at2
points.
(m) Shoulder Belt
- At the time of carrying the SurveyMeter, attach the Belt to the NSN3 with its
Clasps. Refer to (l) shown in Figure 2-1.
(n) Screw for Fastening Battery Cover
- At the time of turningon of themain body, please fasten it well.Atthe time of
changingbatteries, unfasten it. Refer to (e).
(o)Indicator holder
- Preventthe fallingoff of the indicator.

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2.2 Display Unit
Figure2-3 Description of theDisplayUnit
(a) ENT Key
- Use the "ENT" Keyto display setup values/setup screen whilethe Dose Rate
isdisplayed.
- The"ENT"Key is also used to cancel or confirm variousparameters.
(b) ▲Key
- Use the "▲" Key to move the cursor up to the next selection.The"▲" Key is
also used to START, STOP,or RESET theAccumulation Process in the
Accumulation Mode.
- Bypressingthe "▲" Key in theMeasurement Mode, each displayis shown in
the followingorder:
Dose Rate (Initial State) Accumulated Dose
(c) ▼Key
- Use the "▼" Key tomove the cursor down to thenext selection. The "▼" Key
isalso used to START, STOP, or RESETtheAccumulation Process in the
Accumulation Mode.
- Bypressingthe "▼" Key in the Measurement Mode, each displayis shown in
the following order:
Dose Rate (Initial State) Accumulated Dose
(a)
(b)
(c)
(d)
(e)
(f)

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(d) Display
- Thescreen displays themeasurement values and the various status.
(e) USB Connector
- The NSN3 can be connected to the PC by attaching the optional USB Cable
to the Connector. Remove the protective rubber coverand then attachthe
Cable.
- Theoptional Maintenance Software is required for the data communication
with the PC.
(f) Communication Connector
- Use the Connectorto connect theDisplay Unit to the Main Body.

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2.3 Description of the Displays
2.3.1 Display (Dose Rate)
Figure2-4 Displayof Dose Rate
(a) Dose Rate
- Displays Dose Rate Value indigital format.
(b) Unit
- Displays selected unit: "Sv/h"or"mSv/h".
(c) BatteryIndicator
- Indicates the battery level. Replace the standard AA alkaline batteries
immediately when the " " indicatorappears, indicatingthat the batterylevel
is low.WhenusingNi-MH rechargeable batteries, recharge the batteries with
the designated Charger (optional). Refer to the Section 4.3 for detailson the
"Battery Replacement" when replacing AA alkalinebatteries or recharging
Ni-MHbatteries.
(d) Accumulation Indicator
- Indicates that the NSN3 is accumulatingDose Values.WhenDoseValuesare
not beingaccumulated, "||" is displayed.
(e) Time Constant
- Indicates selected time constant: A,L, M, or S. Referto section 3.1 forTime
constantsettingand the section 5 fordetails onthe "Time Constant".
(f) Buzzer Indicator
- Indicates whether the count monitoringsound is ON/OFF.
(g) Clock Indicator
-Indicates that time display (clock) is displayed at position (h).
(h) Time Display (clock)
- Displays the current time (Hours: Minutes: Seconds).
(i) Communication Error
- Indicatescommunicationerrorbetween thedisplayand thedetectorboard.
Refer to the Section 8 for details on the "Error Code".
(c)
(d)
(e)
(f)
(g)
(i)
Sv/h
(a)
(b)
(h)
0.00

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2.3.2 Display (Accumulated Dose)
Figure2-5 DisplayofAccumulatedDose
(a) Accumulated Dose
- Displays AccumulatedDose Valuein digital format.
(b) Unit
- Displays selected unit: "Sv" or “mSv".
(c) Accumulation Indicator
- Indicates that the NSN3 is accumulating the Dose Values.When the Dose
Valuesare not being accumulated, "||" isdisplayed.
(d) Time Display(Remaining Time in seconds)
- Displays remaining measurement time. Referto the Section 3.3 "Time Setting
(Accumulation)" fordetails onthe "Accum. time".
Sv
(d)
(a)
(b)
(c)
0.00
401222

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2.3.3 USB Cable Connection
Figure2-6 USBCableIndicator
(a) USB Cable Indicator
- Indicatesthat the Display Unit is connected to the PC usingthe USB Connector.
(a)