neutron survey meter wta523095

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Issued: 2011-01Revised: 2011-10

Instruction Manual

Neutron survey meter

Model: NSN31043-YYYYA-S

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FORWARD

Thank you for buying Fuji Electric Co., Ltd. Neutron Survey Meter. This manual explains operation, the functions and the parts of the survey meter. Please read the manual carefully to ensure correct operation before use. In the malfunction of the product, contact us with detailed information such as the detailed device status, problem, model and product serial number. If possible, enclose picture or diagram to facilitate speedy response. Please consult up before conducting repairs. Failure to do so may result in customer taking responsibility for any malfunction caused.

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PRECAUTIONS

Read the following handling precautions to ensure that you use the product safely and avoid injury or damages. Read this Users Manual carefully to understand all the precautions before using the product.

Measures of Precaution

Caution

The survey meter is a precision instrument; do not drop it or subject it to impact. Keep the survey meter in a plastic bag for protection when use in an environment where chemical fumes, splashes/steam, full of dust and wastes are present.

Handle the survey meter with a clean, dry hand. If becomes tainted, clean it with dry cloth.

Avoid using in an environment with high frequency noise. Pay attention when using near the following devices:

1. Mobile phone 2. PHS 3. High power transceiver, or similar goods 4. Microwave ovens 5. Radars 6. Welding machines 7. Any other spark discharging or high intensity radio wave emitting devices

(Especially keep the survey meter at least 50cm away from PHS or mobile phones)

When the battery level is critically low, immediately replace with new batteries. Prior to disposal of the used AA alkaline batteries, protect exposed terminals with insulating tape following your countrys directions to prevent shorting that might cause possible heating, rupture, or burning. Otherwise, injury or fire might result.

Do not throw the survey meter or batteries into a fire. Do not disassemble them. In the case of retirement of this survey meter, please contact our sales representative or agency.

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Contains of hazardous chemical materials No hazardous materials (or parts including hazardous chemical materials) and dangerous materials (or parts including dangerous materials) is in this survey meter. If you have any questions, please contact our sales representative or agency.

Contains of flammable

Caution Combustibility gas is included in the detector of this survey meter. Avoid using near fire. Do not throw the survey meter into a fire. Avoid the hard impact to the survey meter. Do not drop the survey meter. Otherwise, the detector might be damaged and internal flammable gas might cause fire or explosion. If you have any questions, please contact our sales representative or agency.

Disposal of product

When disposing this product, dispose it as an industrial waste. Regarding the disposal of this product, please follow the waste disposal instructions of your country. If you have any questions, contact our agency.

Accessories The followings are included in this product. Please confirm.

Instruction Manual (this document) 1 Test report 1 AA alkaline batteries 6 Shoulder belt 1

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Contents 1. General ...................................................................................................................................................6 2. Configuration...........................................................................................................................................6 3. Each Component and Functions......................................................................................................7

3.1 Parts name of main body ................................................................................................. 7 3.2 Parts name of display unit .............................................................................................. 10 3.3 Items on the display ....................................................................................................... 12

3.3.1 indication of dose rate.............................................................................................. 12 3.3.2 Indication of dose..................................................................................................... 14 3.3.3 Indication of USB communication with PC............................................................... 15

4. Operation .............................................................................................................................................16 4.1 Dose rate measurement and time constant setting ........................................................ 17 4.2 Dose measurement........................................................................................................ 18 4.3 Time setting for dose measurement ............................................................................... 18 4.4 Setting for power-saving mode....................................................................................... 18 4.5 Brightness control of display .......................................................................................... 19 4.6 Buzzer (monitor sound) ON / OFF setting...................................................................... 19 4.7 Trend data measurement interval setting ....................................................................... 19 4.8 Date & time setting......................................................................................................... 20 4.9 Copy of trend data.......................................................................................................... 20

5. Maintenance ........................................................................................................................................21 5.1 Maintenance and replacement parts .............................................................................. 21 5.2 Maintenance parts list .................................................................................................... 22 5.3 Battery replacement ....................................................................................................... 23

6. Time Constant Table..........................................................................................................................24 7. Troubleshooting table list ................................................................................................................25 8. Appendix A ..........................................................................................................................................27

8.1 Specifications ................................................................................................................. 27 8.2 Radiation characteristics ................................................................................................ 29

8.2.1 Relative error of indication ....................................................................................... 29 8.2.2 Energy response for neutron energy........................................................................ 30 8.2.3 Response for photon radiation ................................................................................. 31 8.2.4 Angler response ....................................................................................................... 32

9. Appendix B ..........................................................................................................................................33 9.1 Error code ...................................................................................................................... 33

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1. General

This equipment is a portable neutron survey meter to measure neutron dose rate and dose at neutron fields in nuclear facilities or accelerator facilities, etc. Lightweight and high sensitivity have been realized by adopting organic mixed gas counter. Measured values are displayed on the display, and neutron counting can be monitored with beep sound and LED lighting. For power source, AA alkaline battery, commercial AC source(optional), and AA NiMH rechargeable battery(optional) are available. With serial communication function through USB port, transmission of measurement values to commercial PC and trend data measurement are available.

2. Configuration

This product is composed as described in the below. Please confirm before use.

Item Quantity Remarks Survey meter 1 USB port Instruction Manual 1 this document Test report 1 AA alkaline battery 6 Shoulder belt 1 AC adaptor 1 12V DC AA NiMH rechargeable battery 6 optional Battery charger 1 optional Maintenance software 1 including USB cable,

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3. Each Component and Functions In this clause, parts names and functions of this equipment are described.

3.1 Parts name of main body

Fig.3-1

Detector body Detects neutrons. Be sure to point the direction to measuring object.

Display Measurement values and status are shown on the organic EL display.

Caution Be sure to turn the survey meter OFF, when the display is detached from detector body or attached to detector body.

Measuring object

(2 Positions)

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Operating pad Switches various functions with the keypad. For each function, see Section 3.2 Components of display

Power switch Press | down to turn ON. Press O down to turn OFF.

Battery compartment Slide the battery cover up to open. Remove batteries and replace new ones. Make sure to insert batteries with positive and negative terminals correctly oriented and surely close the component. Refer to Section 5.3 Battery replacement in detail.

Caution

When replacing batteries, make sure to turn the survey meter OFF. Insert a new battery in the compartment correctly. Apply only AA Alkaline batteries or Ni-MH batteries. For battery replacement, apply new batteries. In case of AA Ni-MH battery replacement, make sure to apply fully

recharged 6 batteries. For disposal of removed battery, follow the instructions of your country.

LED Red LED which monitors the detection count. LED lights continuously in high dose rate field.

External power supply connector Connect to the AC adaptor (optional). Do not use any other external power supply. It could result in a malfunction or heating.

Caution

Recharging has to be done using a charger. When recharging batteries, open the battery cover ( of Fig.3-1) and remove the all 6 batteries then recharge with the exclusive charger. Refer to Section 5.3 Battery replacement in detail.

Data port

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USB connector for data communication. Remove the protecting sheet before use. It communicates with PC installed the maintenance software(option) through ordinary USB cable(option). Do not directly touch USB connector to prevent from dirt. When not in use, apply the protecting sheet to prevent dust or water.

Screw for tripod Ordinary camera tripod can be fixed.

Handle For holding the survey meter when moving.

Screw for case cap fastening Use only for maintenance. Do not open the case without unless necessary. Malfunction might be caused due to penetration of exogenous material or water into internal circuit.

Shoulder belt lugs Each of lugs should be strapped with a shoulder strap (2 positions).

Shoulder belt Used for carrying the survey meter by attaching to No. 12 shoulder belt lugs.

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3.2 Parts name of display unit

Fig.3-2

ENT key Pressing ENT key during displaying dose rate can show screen for setting values. Also, various setting or cancel can be done with the key.

key Sets various setting values or sets operation status for dose measurement to START / STOP / RESET. For dose rate/ dose display, displayed item can be switched as the following order by pressing the key.

Dose rate (initial state) Dose

key Sets various setting values or sets operation status for dose measurement to START / STOP / RESET. For dose rate/ dose display, displayed item can be switched as the following order by pressing the key.

Dose rate (initial state) Dose

Display Displays measurement values or the status on the organic EL display.

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USB port Can be connected with USB cable (option) by removing cover to connect with PC. Maintenance software (option ) is required to communicate with PC.

Communication connector Connected to the main detector body.

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3.3 Items on the display

3.3.1 indication of dose rate

Fig.3-3

Dose rate value Indicates dose rate.

Unit Displayed units are Sv/h or mSv/h.

Battery level Indicates remaining battery power. Replace new batteries when low battery level is indicated. Refer to Section 5.3 Battery replacement for how to replace batteries. Also, recharge batteries with the exclusive charger in case of using rechargeable batteries.

Dose mark Indicates that dose is under measurement. When the dose measurement is not operated, is indicated.

Time constant Indicates selected time constant from L, M, and S. For more detail, see Section 6 Time Constant Table.

Buzzer mark Indicates the count monitor sound is ON/OFF.

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Clock display Indicates that the time is indicated on the No. 8 in the above figure.

Clock Indicates present time (hour: min: sec).

Communication error Indicates there is a communication error between display and detector base plate. For details of error code, refer to Section 9.1 Error code.

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3.3.2 Indication of dose

Fig.3-4

Dose value Indicates dose value.

Unit Indicated unit are Sv or mSv.

Dose mark Indicates that dose is under measurement. When the dose measurement is not operated, || is indicated.

Remaining time Indicates remaining time by second.

0003600

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3.3.3 Indication of USB communication with PC

Fig.3-5

USB communication Indicates that the display is connected to PC through USB port. (not indicated for unconnected)

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4. Operation

This chapter explains operation flows. Function of display and operation are categorized as follows.

Note: During USB communication with PC and trend data copying to the memory in the display, measurement (dose rate and dose) can not operate.

1) Measurement value display

Displays by switching dose rate and dose.

2) Setting value display Time constant, buzzer sound volume, date/time, trend data storage on/off (*1), time, trend data measurement interval, display brightness can be set. *1 Copies the latest trend data from the main detector body into built-in memory in the

display unit.

3) Communication function This function automatically activates when connecting to PC. Setting of calibration constant and time, trend data storage on/off (*2) can be performed. *2 Copies updated trend data from the main detector body into PC.

When the main detector body is turned OFF or the display unit is removed from the main body, copies trend data recorded in built-in memory in the display unit into PC.

4) Dose control

Sets the operation status for dose measurement to START, STOP, or RESET. Dose measurement automatically starts after at the time of startup. To STOP or RESET the measurement, select operation items with ENT key and then press the buttons in the order of ENT. To restart, perform the same procedures.

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Fig.4-1

4.1 Dose rate measurement and time constant setting

Dose rate measurement is a basic function. It can be started by turning the power on.

Enabling the CPU device to start up for 2 seconds after turning on the power. The display is turned on when the device is ready.

Previous setting of the buzzer mode will be taken over. To acquire a dose rate, allow the device 3 times as much as the specified time constant to read

the indication. Refer to Section 6. Time constant table. To change time constant, press ENT key on the dose rate measurement screen then select Time

Const. S, M or L can be chosen with ENT key. Refer to Section 6. Time constant table.

Start up (power switch)

Measurement value display

Dose rate

Dose

Calib. factor

Communication function

USBconnection

Setting value display 1

Buzzer

Settings

Time Constant

Date & Time

Setting value display 2

Trend cycle

Maintainance

Accum. time

Brightness

Trend copy

Selectable with

Selectable with

ENT key

PC display

Date & Time

Trend copy

Dose control

STOPSTART

RESET

Press in order of ENT to reset.

(EXIT)

ENT key

ENT key

Press key twice or key

key key

key key

key key

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4.2 Dose measurement

Press key or key on the dose rate measurement screen to proceed to the dose screen. To stop dose measurement, press ENT key once on the dose indication display. Check that

STOP is displayed at the lower left of the display and then press keys in order of ENT key to stop (temporally stop) dose measurement. To restart the dose measurement, perform the same procedures on the START display after pressing ENT key.

To clear the dose value, press in order of ENT key after RESET? is displayed on the lower left of the display. Dose value and remaining time are reset and then time (setting value) is displayed.

4.3 Time setting for dose measurement

Press ENT key on the dose rate measurement screen to proceed to the menu screen. (or ) key and ENT key can change the setting. Press ENT key while Accum. time is selected. Readings are displayed in digital 4 digits by

minute.

To change time, press key or key to set time. Press ENT key to select SET after time is set. To cancel the changing, press key or key

while SET is displayed, and then press ENT key while CXL is displayed. 4.4 Setting for power-saving mode

The display can be temporally turned off for no operation on the display for a certain time. (Default

setting is 5 min)

Press ENT key on the dose rate measurement screen to proceed to the menu screen. (or ) key and ENT key can change the setting. Select Backlight with (or ) key and press ENT key at the same time.

Setting time (3 choices as below) changes each time ENT key is pressed. means that the display

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is always turned on. 1 min 5 min

4.5 Brightness control of display

Three levels of the display brightness can be chosen. (Default setting is M)

Press ENT key on the dose rate measurement screen to proceed to the menu screen. Select Setting with (or ) key and ENT key. Select Brightness with (or ) key and press ENT key at the same time.

Three levels of brightness are selectable. The level (3 choices as below) on the screen can be changed by pressing ENT key.

L M H

4.6 Buzzer (monitor sound) ON / OFF setting The beep sound (ON / OFF) can be set. (Default setting is ON)

Press ENT key on the dose rate measurement screen to proceed to the menu screen. Select Buzzer with (or) key and press ENT key at the same time.

Each time ENT key is pressed it changes as below. ON OFF

Buzzer icon will be displayed on the dose rate (or dose) indication display when ON is selected.

4.7 Trend data measurement interval setting

Trend data measurement interval can be set in 8 steps depending on the environment. (Default setting is 60 sec.)

Press ENT key on the dose rate measurement screen to proceed to the menu screen.

Select Setting with key (or key) and ENT key.

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Press ENT key selecting Trend cycle with key (or key) at the same time. Setting time (8 choices as below) changes each time ENT key is pressed.

0 10 20 30 60 120 300 600 (sec) (default)

When 0 is selected, trend data measurement is stopped.

Press ENT key for each digit to confirm.

4.8 Date & time setting


Select Date & Time with (or ) key and press ENT key at the same time. The last 2 digits of the year can be set with (or ) key. (e.g.,) 2009 09 Y

Pressing ENT key to change displayed items in the following order: Y (Year) M (Month) D (Day) h (hour) m (minute)

Second will be set to 0 automatically. Select SET and press ENT key at the same time to confirm the entered time.

Select CXL with (or ) key and press ENT key at the same time to cancel the setting.

4.9 Copy of trend data Trend data is automatically measured and saved by display unit. The data is copied into PC. Storage of trend data is a basic function. Trend data can be measured and stored by turning the power on. Time interval to store trend data is set to 60 sec before delivery. It can store up to 1200 data. For stored data over 1200, data is automatically overwritten beginning with the oldest one and a user needs not to reset trend data. Procedure to temporally copy (back-up) the trend data into the display unit is as follows:


Copy starts after pressing ENT key while selecting Trend copy with key (or key). Number of recorded trend data and copied item are displayed. When the copy is completed, press key (or key) and then press ENT key after CXL is

indicated.

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5. Maintenance

5.1 Maintenance and replacement parts

Maintenance procedures are described in Table 5-1 Maintenance procedures and Table 5-2 Maintenance methods. We are not responsible for repairing of your product by your self.

Table 5-1 Maintenance procedures

No Item Description

1 Storage method Store wrapped in a plastic bag with Power switch OFF. Remove all batteries.

2 Storage environment

Temperature : -10 to +45 Humidity : 35% to 85% (non-condensing) Others : Place with less dust, away from direct sunlight, with less

vibration or electromagnetic ray, not exposed to rains, with low neutron dose rate

3 Inspection before

use For long storage, dust may be adhered. Check the followings: Clean surface dust of power connector and display with dry cloth or soft

brush. Insert 6 batteries in properly, turn ON/OFF POWER switch 2 or 3 times,

and then check indications are displayed on the display. (Power turns OFF in 1.5 sec after turning the switch OFF.)

4 Others Do not use any adaptors other than the exclusive AC adaptor (another sales).When using secondary batteries, fully charge the all batteries.

Caution

For charge, open the compartment and remove all 6 secondary batteries. When using primary batteries, replace all the 6 primary batteries with new ones.

Capacity of secondary batteries is decreased due to self-discharge. For storage more than 1 month, be sure to recharge before use.

For charge of secondary batteries, use ordinary charger. Remove all batteries before storing, otherwise electrode might be corroded. Do not use primary batteries and secondary batteries together.

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Table 5-2 Maintenance methods

No Item Description 1 Battery replacement

(for primary battery) For low battery voltage, replace the batteries with new ones. For battery replacement, see Section 5.3 Battery replacement.

2 Battery charge (for secondary battery)

For low battery voltage, charge the batteries. For battery charge, see Section 5.3 Battery replacement. It depends on operation environments, however, replacement with new secondary batteries is recommended before operation period of the batteries exceeds one year or 400 cycles. For secondary batteries, use ordinary Ni-MH batteries.

3 Dust removal Clean internal dust of USB terminal and signal connector with dry cloth or soft brush. If it becomes significantly tainted, completely clean it with ethanol-soaked gauze. Pay full attention to ventilation and fire when using ethanol.

4 Check of sensitivity and soundness

Make the same geometrical conditions using checking source such as 252Cf within a year and then relatively compare with readings after delivery.

5.2 Maintenance parts list When replacing the maintenance parts, contact our sales representative or agency.

No Item Cycle Fuji Electric

Number Type Remarks

1 Button battery 5 year 79210N8 CR2032 Made by MAXELL Battery back up for RTC IC

2 Packing 5 year TK4J6654 Silicone rubber for moisture proof

Caution

When replacing batteries, make sure to turn the power OFF. Insert a new batteries in the compartment correctly. For retirement of removed batteries, follow the instructions of your country. Be sure to fully ventilate when using ethanol. When you inhale too much vapor, it

may make you sick or get an injury. Do not use fire in the vicinity. It may cause fire disaster.

Handle a checking source carefully. Handling a checking source should be performed by fully experienced personnel.

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5.3 Battery replacement

For battery removal or replacement, follow the following procedures.

(1) Turn OFF the power switch of main body (See of Fig.3-1).

(2) Remove the battery cap of battery compartment (For location, see of Fig. 3.1). (3) Remove 6 batteries from compartment. (4) Insert 6 new AA batteries (alkaline battery or Ni-MH battery) as described in the below figure.

(Do not use together primary batteries and secondary batteries.) (5) Close the battery cap of battery compartment.

Note Use ordinary charger for Ni-MH when charging Ni-MH battery. Note NSN3 is not directly chargeable alone.

Fig.5-1

Caution

When replacing batteries, make sure to turn to off by power switch. Insert a new batteries in the compartment correctly. Use only AA alkaline batteries or AA Ni-MH batteries. Use new or full-charged batteries for all the 6 batteries replacement.

For retirement of removed batteries, follow the waste processing instructions of your country.

Do not use primary batteries and secondary batteries together.

OFF

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6. Time constant table Time constant (sec) Measurement accuracy (2) Measured dose rate

[Sv/h] Short Medium Long Short Medium Long Under 0.03 120 240 600 - - -

0.03 or over Under 0.10 10 30 90 100% 88.2% 50.9%

0.10 or over Under 0.20 10 30 90 83.7% 48.3% 27.9%

0.20 or over Under 0.50 10 30 90 59.2% 34.2% 19.7%

0.50 or over Under 1.00 7 20 60 44.7% 26.5% 15.3%

1.00 or over Under 2.00 7 20 60 31.6% 18.7% 10.8%

2.00 or over Under 3.00 3 10 30 34.2% 18.7% 10.8%

3.00 or over Under 4.00 3 10 30 27.9% 15.3% 8.8%

4.00 or over Under 5.00 3 10 30 24.2% 13.2% 7.6%

5.00 or over Under 6.00 3 10 30 21.6% 11.8% 6.8%

6.00 or over Under 7.00 3 10 30 19.7% 10.8% 6.2%

7.00 or over Under 8.00 3 10 30 18.3% 10.0% 5.8%

8.00 or over Under 9.00 3 10 30 17.1% 9.4% 5.4%

9.00 or over Under 10.00 3 10 30 16.1% 8.8% 5.1%

10.00 or over Under 20.00 3 10 30 15.3% 8.4% 4.8%

20.00 or over Under 30.00 3 10 30 10.8% 5.9% 3.4%

30.00 or over Under 40.00 3 10 30 8.8% 4.8% 2.8%

40.00 or over Under 50.00 3 10 30 7.6% 4.2% 2.4%

50.00 or over Under 60.00 2 5 15 8.4% 5.3% 3.1%

60.00 or over Under 70.00 2 5 15 7.6% 4.8% 2.8%

70.00 or over Under 80.00 2 5 15 7.1% 4.5% 2.6%

80.00 or over Under 90.00 2 5 15 6.6% 4.2% 2.4%

90.00 or over Under 100.0 2 5 15 6.2% 3.9% 2.3%

100.0 or over Under 200.0 2 5 15 5.9% 3.7% 2.2%

200.0 or over Under 300.0 2 5 15 4.2% 2.6% 1.5%

300.0 or over Under 400.0 2 5 15 3.4% 2.2% 1.2%

400.0 or over Under 500.0 2 5 15 3.0% 1.9% 1.1%

500.0 or over Under 600.0 1.5 1.5 4.5 3.1% 3.1% 1.8%

600.0 or over Under 700.0 1.5 1.5 4.5 2.8% 2.8% 1.6%

700.0 or over Under 800.0 1.5 1.5 4.5 2.6% 2.6% 1.5%

800.0 or over Under 900.0 1.5 1.5 4.5 2.4% 2.4% 1.4%

900.0 or over Under 1.00mSv/h 1.5 1.5 4.5 2.3% 2.3% 1.3%

1.00mSv/h or over Under 2.00mSv/h 1.5 1.5 4.5 2.2% 2.2% 1.2%

2.00mSv/h or over 1.5 1.5 4.5 2.2% 2.2% 1.2%

Manual setting described in Section 4.1

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7. Troubleshooting table list Note: This Troubleshooting Table is only applicable to malfunctions occurred during use.

Symptom Possible cause Suggested solution

No indications on display

(1) Defective battery connection (2) Poor connection of battery or

AC adaptor with electrode of survey meter

(3) Weak battery (for secondary battery)

(4) Power switch malfunction or IC malfunction

(1) and (2) Check the proper contacts in the battery compartment and if there is no exogenous material in the battery case.

(3) Charge more than 15 hours with the charger. (4) Please ask our sales representative or

agency.

Garbled characters on display

(1) Defective battery contacts (2) Power switch malfunction or IC

malfunction

(1) Check the proper contacts in the battery compartment and if there is no exogenous material in the battery case.

(2) Please ask our sales representative or agency.

No recovery from power-saving mode even when key or key is pressed. (Display dose not light again)

(1) Power switch malfunction or ICmalfunction


Dose error Displayed dose

rate/dose is too high Displayed dose

rate/dose is too low

(1) Display malfunction (garbled, etc)

(2) IC malfunction (3) Counter failure (4) Calibration constant trouble

(1), (2)and(3) Please ask our sales representative or agency.

(4) Calibration is required. Please ask our sales representative or agency how to calibrate.

(continue)

If the problem continues after troubleshooting, please ask our sales representative or agency. When sending the product back to us, put in a big box with sufficient amounts of packaging materials and the sign of Precision Equipments, etc on the box. Also, the detailed status and problem would be highly appreciated.

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Symptom Possible cause Suggested solution

No monitor sound or too little sound

(Assuming the indication of dose, etc. is normal)

(1) Defective connection of buzzer lead wire

(2) Buzzer or IC malfunction

contd.(1) and (2) Please ask our sales representative

or agency.

Operation time less than 12 hours or frequent detection of low voltage

(1) Degradation/ exhaustion of rechargeable battery

(2) Alkaline batteries are not used for primary batteries.

(3) Increase in abnormal current (4) IC malfunction

(1) Rechargeable batteries are consumables. They may have been used more than a year or 400 cycles. For rechargeable batteries, use ordinary AA type Ni-MH batteries.

(2) Replace with new alkaline batteries (AA type). For battery replacement, see 5.3 Battery replacement.

(3) Check the proper contacts in the battery compartment and if there is no exogenous material in the battery case.


No power supply with AC adaptor

(1) Defective connection of AC adaptor with electrode of survey meter

(2) Diode malfunction of external power supply circuit

(1) Clean the contact point of AC adaptor and electrode of survey meter with soft cloth. Also, check if there is no exogenous material in the battery case.


Communication with USB cable is unable or loss of communication

(1) Communication distance is too far

(2) Communication port is dirty (3) IC circuit parts malfunction

(1) Set the distance between the survey meter and PC to within 1 m.

(2) Clean USB connector with dry cloth or soft brush.


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8. Appendix A 8.1 Specifications

No. Item Specification

1 Radiation detected Neutron (excluding pulse-type neutron measurement)

2 Energy range 0.025 eV to 15 MeV 3 Detector Organic mixed gas counter (including flammable gas) 4 Moderator Not applicable 5 Neutron sensitivity 0.35 s-1/ Sv h-1 (20+U)%

(with 252Cf, neutron conversion constant H*(10) of ICRP74) U: Uncertainty of reference source

6 1 cm dose rate Effective measurement range

5 decades 1 Sv h-1 to 99.99 mSv h-1

7 1 cm dose Effective measurement range

5 decades 0.1 Sv to 99.99 mSv

8 Measurement accuracy (for dose rate) 20 % or less at 10Sv h

-1

9 Measurement accuracy (for dose) 20 % or less at 1Sv

10 Energy dependency Compliance with response curve of ICRP74 H*(10)

11 Angular dependence 25 % (0 . to 90 ., 252Cf or Am-Be) 12 Dose rate characteristic 20 % (ref. 10 Sv h-1) 13 Gamma ray sensitivity Up to 10 mSv h-1: 1 % or less for 137Cs 14 Time constant switching Selectable from Long Medium Short (manual)

Time constant is automatically selected depending on dose rate. (For the details, refer to clause 7.)

15 Measurement range switching Automatic switching (Sv h-1 mSv h-1 ) 16 Display Organic Electroluminescence Display (NHV1) 17 Dose indication Digital indication with maximum 5 decades

Dose rate : 0.00 to 999.99 Sv h-1 1.00 to 99.99 mSv h-1

Dose : 0.00 to 999.99 Sv 1.00 to 99.99 mSv

18 Preset time for dose measurement

Settable from 1 to 9999 min in steps of 1 min.

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No. Item Specification

19

Trend data function Stored data: up to 1200 items Trend data measurement interval: 10 sec, 20 sec, 30 sec, 60

sec, 120 sec, 300 sec, 600 sec are available. (default: 60 sec)

Page No., measurement date and time, storing interval, dose rate, accumulated dose, battery voltage

(For the change of storing time interval and the readout of trend data, exclusive maintenance software(optional) is required.)

20 PC connection Serial data communication using USB port

21 Power source (1) AA alkaline battery Qty.: 6 (2) AA Ni-MH rechargeable battery(option) Qty.: 6 (3) AC adaptor (option)

22 Monitor beep ON / OFF 23 Check functions (1) Battery level indication when low battery voltage is detected

AC adaptor Ample charge Low charge Battery level very low

(Charge the battery in 30 min.) (2) when high dose rate is detected blink 9.99

24 Battery life 12 hr or more

25 Operating temperature -10 to + 45 26 Operating humidity 35 % to 90 % non-condensing 27 Power consumption Typ. 100 mA

28 Size W 150 mm x H 250 mm x L 300 mm

29 Mass 2 kg approx. 30 Warranty period 1 year from purchase date 31 Accessories Instruction Manual (this document )1

Test report 1 AA alkaline battery 6 Shoulder belt 1

32 Option (Another sales) Please ask our sales representative or agency for the details. AC adaptor (100 to 240V AC, 12V DC) GF12-US1210 AA Secondary battery TK7P0018P1 Charger for secondary batteries TK7P0017P1 Maintenance software (including USB cable)

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8.2 Radiation characteristics 8.2.1 Relative error of indication 8.2.1.1 Dose rate

Note) using electrical pulse Fig.8-1

8.2.1.2 Dose

Note) using electrical pulse Fig.8-2

[mSvh-1]

-40

-30

-20

-10

0

10

20

30

40

0.01 0.1 1 10 100 1000 10000 100000 1000000

Dose equivalent rate [Sv h-1]

Rel

ativ

e re

spon

se o

f dos

e ra

te [

% ]

Time constant = STime constant = L

0.1 1 10 100 1000 10000 100000 1000000

Dose equivalent rate [Sv/h-1]

-40

-30

-20

-10

0

10

20

30

40

0.01 0.1 1 10 100 1000 10000 100000 1000000

Accumulate dose equivalent [Sv]

Rel

ativ

e re

spon

se o

f acc

umul

ate

dose

[%]

0.1 1 10 100 1000 10000 100000 1000000

Dose equivalent [Sv]

WTA523095 30 / 34

8.2.2 Energy response for neutron energy 8.2.2.1. Continuous energy neutron sources

Organization and facility of evaluation: Facility of Radiation Standard (FRS) of Japan Atomic

Energy Agency (JAEA) in Japan.

Neutron sources: 252Cf (2.13 MeV), 241Am-Be (4.16 MeV), thermal neutrons generated from graphite pile loading an 252Cf source (0.025 eV), D2O- moderated neutrons of 252Cf source (550 keV), and concrete-moderated neutrons of 241Am-Be source (580 keV, 1.5 Mev, 2.6 MeV).

Fig.8-3

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

0.0 1.0 2.0 3.0 4.0 5.0 6.0 Spectrum Average Neutron Energy [MeV]

Rel

ativ

e re

spon

se

Ref

252

Cf

Thermal neutron fieldHeavy water moderated fieldConcrete moderated field252Cf241Am-Be5MeV14.8MeV

14.8MeV

WTA523095 31 / 34

8.2.2.2. Monoenergetic neutron sources Organization and facility of evaluation:

1. Facility of Radiation Standard (FRS) of Japan Atomic Energy Agency (JAEA) in Japan.

2. Advanced Industrial Science and Technology (AIST) in Japan.

3. Fast neutron laboratory of Tohoku University in Japan.

Simulation calculation: Particle and Heavy Ion Transport code System (PHITS code)

Fig.8-4

8.2.3 Response for photon radiation

Gamma-ray (137Cs) Reference dose rate

[mSv/h]

Indication [mSv/h]

Response [%]

1 0.00005 0.005

10 0.00070 0.007

1.0E-04

1.0E-03

1.0E-02

1.0E-01

1.0E+00

1.0E+01

1.0E-08 1.0E-06 1.0E-04 1.0E-02 1.0E+00 1.0E+02

[MeV]

2

52C

f

(PHITS)

Rel

ativ

e re

spon

se [R

ef: 2

52C

f]

Fluence-average neutron energy [MeV]

PHITS code

WTA523095 32 / 34

8.2.4 Angler response 8.2.4.1. Horizontal

Fig.8-5

8.2.4.2. Vertical

Fig.8-6

-100%-75%-50%-25%

0%25%50%75%

0right15

right30

right45

right60

right75

right90

right105

right120

right135

right150right165

180left165

left150

left135

left120

left105

left90

left75

left60

left45

left30left15

-100%-75%-50%-25%

0%25%50%

75%up90

up105up120

up135

up150

up165

180

down165

down150

down135

down120down105

down90down75

downy60

down45

downe30

down15

0

up15

up30

up45

up60up75

WTA523095 33 / 34

9. Appendix B

9.1 Error code

Error code when communication failure is detected is as below:

* * (Upper) (Lower)

Upper : Error detection device number Lower : Error code

0 : PC 1 : NHV1 (Display) 2 : NSN3 (Detector)

0 : RAS failure when start-up 1 : BCC failure 2 : Communication failure Overrun error

Framing error Parity error 3 : Sequence number failure 4 : BYTE failure of received data 5 : Format failure 6 : Time out error of received data 7 : Received multi-request signal 8 : Power supply failure 9 : EEPROM failure

RAS: Reliability, Availability, Serviceability BCC: Binary Code Check EEPROM: Electrically-Erasable Programmable Read-Only Memory

WTA523095 34 / 34

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