Radiation Meter Neutron Measurement Dose Equivalent Rate
Measurement Dose Equivalent Measurement FJ31-7103GN
I. Product introduction
FJ31-7103GN is a multifunctional radiometric instrument with high
sensitivity for rapid detection of gamma and neutron (selected) in
unknown radioactive environment. It is the first choice alarm
instrument used by environmental monitoring, homeland security,
border ports, commodity inspection, customs, airport, fire control,
emergency rescue, chemical defense force and other departments for
routine survey and search for weak radioactive sources. This
instrument can not only carry on all-weather monitoring and
measurement alarm to radiation environment dose rate and dose, but
also has powerful wireless transmission and integrated management
function of background software.
FJ31-7103GN dosimeter is designed to work in a single machine, and
has the functions of neutron measurement, dose equivalent rate
measurement, dose equivalent measurement, service time, parameter
viewing and parameter setting. The dosimeter will directly enter
the measurement state after starting up, and the screen will
display the dose equivalent rate measurement value and dose
equivalent measurement value.
FJ31-7103 type designed. The dosimeter main interface by "measuring
interface", "dose equivalent rate Settings", "cumulative dose",
"dose equivalent Settings", and "neutron counting alarm Settings"
"alarm sound Settings" "alarm vibration Settings", "key sound
Settings", "communication Settings", "save Settings", "set time"
and "version information" twelve interface, including "time
setting" contains: year, month, day, hours, minutes, seconds set.
Press the button in short mode to switch between the interfaces. In
setting mode, press the power button to quickly return to the
"Measurement interface" page.
2. Main features
• High sensitivity cesium iodide scintillation crystal and lithium
fluoride detector
•Compact design and measurement of multiple gamma rays: rapid alarm
for chi-square and gamma rays in 2 seconds, and neutron ray alarm
in 2 seconds
• double-button operation with OLED LCD, easy to operate and
flexible to set up
• Strong and explosion-proof, suitable for any harsh environment:
IP65 protection grade
• vibration, sound and light alarm for complex environment
• Support bluetooth wireless communication: real-time data, alarm
transmission and historical record download, facilitating system
integration
• green and low energy consumption: two no.5 civilian alkaline
batteries can be used continuously for 200 hours
3. Instrument functions
The dosimeter can achieve the following functions:
Measured dose equivalent rate;
Measured dose equivalent;
The alarm value of dose equivalent rate can be set;
The dose equivalent alarm value can be set;
Communication switch and sound switch can be set;
Work parameters can be viewed through the function key;
With the function of self-check, the fault can be identified and
suggested, such as detector fall off, low voltage and so on.
Optional Bluetooth data reading system for historical data reading.
4. Performance indicators
| Detector | Cesium iodide and lithium fluoride |
| Energy response | 50kev~3MeV |
| Dose rate range | 0.01μSv/h~5mSv/h |
| Relative error | <±20%(Cs-137) |
| Dose equivalent range | 0.01 Sv ~ 9.99SV(X/γ) |
| Dose equivalent rate range | 0.01 Sv/h ~ 9.99SV /h |
| Dose error | less than 10% |
| Dose equivalent error | ≤10% within the measurement range |
| Neutron range | 0.01 CPS ~ 99999CPS |
| Neutron sensitivity | 0.5 CPS /1 Sv/h |
| Calibration accuracy | ±5% (for CS-137 radioactive sources) |
| Dose rate alarm | continuously adjustable in the range of 0.01 Sv/ h-9.99SV /h |
| Response time | 5S |
| Working environment | temperature:-30℃~+50℃ humidity:<95%R.H(Non - Condensing) |
| Storage temperature | -40℃ ~ +70℃ |
| Protection level | IP65 |
| Communication | Data can be downloaded through Bluetooth 9600BPS/USB communication
interface for data management and networking |
| Power types | 3.7V lithium-ion rechargeable battery (with charger), working time:
more than 200h under background measurement. |
| Overall dimensions | 115×58×45mm |
| Weight | About 270g |
5. Standard delivery
Main unit
Battery charger
USB cable
Carrying case
Manual
Calibration certificate
6. Notes
FJ31-7013GN neutron personal dosimeter is a precision instrument;
please pay attention to protection, the following Suggestions will
be beneficial to the maintenance of the instrument and prolong its
service life.
1. Try to keep dry during storage and use. Excessive humidity will
damage the instrument.
2. Do not drop, knock or vibrate violently, otherwise the detector
will be damaged.
3. If not used for a long time, please remove the battery.
4. If the instrument cannot work normally, please send it to the
designated authorized service point for repair.
HUATEC Group has the final right to interpret this manual.
HUATEC Group reserves the right to improve or modify this manual
without prior notice to the user.
Safe operation specification
Please read the manual carefully. If you do not follow the manual,
the instrument may not work properly.
1. Only accessories and batteries that meet the standards shall be
used.
2. Please use the standard 14650,3.7 V lithium-ion rechargeable
battery only.
3. Remove the battery if not used for a long time.
4. Unauthorized modification or repair may cause damage to the
instrument.
5. If you suspect that the instrument may be out of order in your
work, please close the instrument and quickly withdraw from the
dangerous place. Contact the manufacturer as soon as possible.
6. This product is only for radioactive related workers
7. Alarm
When the dose equivalent rate and dose equivalent exceed the preset
alarm threshold, the dosimeter will give out sound, light and
vibration alarm. These alarm indications are:
1. The buzzer of the dosimeter gives a sound alarm;
2. The display screen shows relevant information;
3. Indicator light flashes once a second;
4. Vibration of dosimeter.
