Nuclear Radiation
Detector User Manual

CATALOG

Notice to user

• Please read this instruction manual and operation instructions carefully, Follow the instructions in the manual, In order to make the detector function fully.

• Please keep this manual

• Don’t use this equipment in a flammable and explosive environment.

• Replaced used batteries and discarded instruments cannot be
  disposed of with household waste. Please handle according to relevant national or local laws.

• When there are any quality problems with the instrument or questions about using the instrument. You can contact “FNIRSI” online customer service or the manufacturer. We will solve it for you as soon as possible

Product Description

This product uses a Geiger-Miller counter. Counter for detecting the intensity of ionizing radiation (beta particles, gamma rays and x-rays).Use a gas tube or a small chamber as a probe. When the voltage applied to the probe reaches a certain range. Each time the ray is ionized in the tube to produce a pair of ions, it can be amplified to produce an electric pulse of the same size. And recorded by the connected electronic device. The number of rays per unit time thus measured. The alarm
threshold measurement rate can be arbitrarily selected.

Key features

• Detect x ray，γ rays and β rays.
• High sensitivity, can be used in various environments.
• Data is saved during shutdown.
• High-definition LCD display. The status display is clear at a glance.
• Light/Vibration/Sound 3 combined alarm modes to choose.
• Real-time clock display.
• The product can preset dose rate and cumulative dose alarm
  threshold.

Product parameters

The button description

• Left/Back key: Return to the upper menu from the lower menu
• Right key/setting key: Enter the setting menu/enter the lower menu
• Power on/off key/OK key: Switch on/Off/Confirm
• Up key: Switch options up and down
• Down key: Switch options up and down

How to operate

Power on/of

Short press the power button to turn it on. Long press the power button to shut down.

Monitoring interface

Automatically enter this page after booting, and monitor parameters:

• Real-time detection amount, displayed in the upper left panel
• Average value/Maximum value
• Current dose alarm value
• Cumulative dose alarm value
• Cumulative stored dose rate

Press the left and right keys to switch to the waveform detection page as follows:
●Waveform monitoring
●Current dose rate real-time value
●Maximum value
●Minimum

Settings

Long press the right key/setting key to enter the setting menu. Long press the left button/back button on the setting page to return to the monitoring page. Press the up and down keys to switch the setting options.

Setting Options:

• Unit settings
• Alarm settings
• System clock
• Alarm mode
• Display settings

Unit setting

Press the right button to enter the lower level to set five measurement units:

• μSv/h
• μGy/h
• mR/h
• CPS
• CPM

Alarm settings

Long press the right key/setting key to enter the setting menu. Press the up and down keys to switch the setting options. Press the right button to enter the lower settings to set or change the values of the following options:

• Current dose alarm value
•  Cumulative dose alarm value
• The accumulated dose is reset to zero

System Clock

Long press the right key/setting key to enter the setting menu. Press the up and down keys to switch the setting options. Press the right button to enter the lower level settings to set the date and time.

Alarm mode

Long press the right key/setting key to enter the setting menu. Press the up and down keys to switch the setting options. Press the right button to enter the lower level settings. On or off:

• Indicator
• Vibration
• Sound

Display Settings

Long press the right key/setting key to enter the setting menu. Press the up and down keys to switch the setting options. Press the right button to enter the lower settings:
●Screen brightness adjustment
●Switch between Chinese/English

Conversion of radioactive units

International Standards (1990)

Radioactive staff: 20mSv/year (10μSv/hour)
General public: 1mSv/year (0.52μSv/hour)

Unit conversion

1μSv/h=100μR/h 1nc/kg.h=4μR/h
1μR=1γ(The unit used for prospecting in the pronuclear industry)

Radioactivity:
1Ci=1000mCi
1mCi=1000μci
1Ci=3.7×1010Bq =37GBq
1mCi=3.7×107Bq =37MBq
1μCi=3.7×104Bq=37KBq
1Bq=2.703×10-11Ci=27.03pci

Metering equivalent:
1Sv=103mSv=106μSv
1Sv=100rem 100μrem=1μSv

Exposure:
1R=103mR=106μR
1R=2.58×10-4c/kg

Absorption metering:
1Gy=103mGy=106μGy
1Gy=100rad 100μrad=1μGy

Radon unit:
1Bq/L=0.27em=0.27×10-10Ci/L

Other:
1Sv is equivalent to 1Gy 1g radium=0.97Ci≈1Ci

Calculation of radioisotope decay values

A=A0eλ-t t=T1/2 ；
A0 The known source strength A is how much time has elapsed, According
to the radioactive decay calculation table look-up table calculation.

The relationship between radioactive source and distance

The intensity of the radioactive source is inversely proportional to
the square of the distance.
X=A.г/R2A: The activity of the point source; R: Distance from source;
г: Exposure rate constant
Note: Ra-226 (t 1608) г=0.825 ren. m2/hour. Curie
Cs—137 (t 29.9 years) г= 0.33 ren. m2/hour. Curie
Co—60 (t 5.23 years) г=1.32 ren. m2/hour. Curie

According to the radioactive decay calculation table, look up the table to calculate the radioactive shielding:

Halved and reduced to 1/10 value (cm) for different substances

Radioactive source|

Pencil

| Iron|

Concrete

| Halving| 1/10| Halving| 1/10| Halving|

1/10

Cesium-137|

0.65

| 2.2| 1.6| 5.4| 4.9|

16.3

Iridium-192|

0.55

| 1.9| 1.3| 4.3| 4.3|

14.0

Cobalt-60|

1.10

| 4.0| 2.0| 6.7| 6.3|

20.3

NOTE

Nuclear radiation detectors are sophisticated instruments. Please be careful. The following recommendations will facilitate instrument maintenance and prolong life.

1. Keep as dry as possible during storage and use. Excessive humidity can cause malfunction and damage to the instrument.
2. Please don’t use the instrument violently or rudely, prevent dropping, knocking and violent vibration of the instrument. Otherwise, the instrument will be damaged.
3. When the power display is too low, it is in an under voltage state and should be charged in time. In case of serious under voltage, the instrument can not be turned on and off, and abnormal phenomena such as blurred screen occur.

※If the instrument cannot work normally, please contact our company after sales. We will solve the problem

Instrument maintenance

• Please keep it dry and wipe off the dirt on the surface of the instrument with a soft cloth before use. Don’t use detergents or solvents
• Please recycle and use damaged instruments, accessories and packaging materials in an environmentally friendly manner.
• Please shut down in time when not in use for a long time
• Don’t disassemble or replace components without permission to avoid failure.
• Please store in a dry place when not in use.

Production information

Product Name: Nuclear Radiation Detector
Brand/Model: FNIRSI/GC-01
Service phone: 0755-83242477
Manufacturer: Shenzhen FRI NI RUI SI Technology Co., Ltd.
URL:www.fnirsi.cn
Factory address: 8th Floor, West of Building C, Weida Industrial Park,
Dalang Street, Longhua District, Shenzhen City, Guangdong Province

References

• 菲尼瑞斯科技

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