FNIRSI GC-02 Radiation Detector and Dosimeter User Manual

Introduction

Thank you for choosing the FNIRSI GC-02 radiation detector and dosimeter. This user manual is an integral part of the product and contains important instructions for its operation and use. Please read this manual carefully to ensure the best possible experience with the product. Keep this manual for future reference.

Important User Precautions:

• This manual provides a detailed introduction to the product. Please read it carefully to ensure optimal product usage.
• Keep this manual for future reference.
• Do not use the device in flammable or explosive environments.
• Dispose of used batteries and devices in accordance with applicable national or local laws and regulations.
• If you encounter any quality issues or have questions regarding the product's use, please contact FNIRSI online customer service for assistance.

Product Overview

The FNIRSI GC-02 is a newly launched nuclear radiation detector from FNIRSI, featuring an elegant design, compact size, and high precision. It utilizes a high-precision Geiger-Müller counter to accurately detect ionizing radiation, including gamma rays, beta rays, and X-rays.

The device is equipped with a 1.5-inch IPS LCD display with high resolution, offering a clear and concise interface with easily readable data. Users can view real-time values, average values, maximum values, and cumulative values. The device allows for setting alarm thresholds, customizing sleep modes, and automatic shutdown, and supports switching between 8 languages.

Additional features include a timed monitoring mode and history display, which records up to 10 measurements in non-volatile memory, retained even after the device is turned off. The GC-02 is powered by a rechargeable lithium battery, providing up to 6 hours of operation.

The FNIRSI GC-02 is an ideal tool for detecting nuclear radiation anytime and anywhere, offering peace of mind, accuracy, and convenience.

Product Functions

• Detection of X-ray, gamma, and beta radiation.
• High sensitivity and usability in various environments.
• User interface in eight languages: Chinese, English, Russian, German, Japanese, Portuguese, Spanish, and Korean.
• Regular monitoring.
• Data storage upon device shutdown.
• Choice of two combined alert methods: light/sound.
• Allows setting of current alarm value and cumulative alarm value.

Specifications

Buttons and Functions Overview

The device features several buttons for operation:

• Up Arrow Button: Press briefly to move up; long press to enter settings.
• Down Arrow Button: Press briefly to move down; long press to return to the previous screen.
• Left Arrow Button: Press briefly to move left.
• Right Arrow Button: Press briefly to move right; long press to enter settings.
• OK Button: Short press to confirm; long press to turn the device on/off.

Panel Introduction

ON/OFF: Turn the device on or off by long-pressing the OK button.

General Screen: This screen displays real-time dose rate and dynamically tracks cumulative measurement results, alarm thresholds, and status. It automatically switches to this screen upon device startup.

[Image description: The general screen shows the time, battery status, volume icon, current dose rate (043.00 uSv/h), real-time cumulative value (220.00 mSv/h), current alarm value (080.00 uSv/h), and cumulative alarm value (440.00 mSv/h).]

Curve Record Screen: This screen is useful for monitoring the dynamic curve of the ambient radiation dose and analyzing average and maximum values. Pressing the left and right buttons switches to the curve record mode.

[Image description: The curve record screen shows the time, current measurement speed in real-time (000.13 usv/h), a graph of the detected radiation waveform in real-time, and average (000.10 uSv/h) and maximum (000.18 mSv/h) values.]

Timed Monitoring Screen: This screen allows setting the start and end times for monitoring without manual supervision. It automatically tracks changes in ambient radiation levels according to the set time. Upon completion, the results are automatically saved to the history page. Pressing the left and right buttons switches to the monitoring mode.

[Image description: The timed monitoring screen shows the device start time and operating time, current measurement speed, and monitoring mode runtime.]

History Record Screen: This screen displays previously recorded radiation levels, facilitating historical data analysis. Up to 10 sets of records can be saved. Pressing the left and right buttons switches to the monitoring mode history.

[Image description: The history record screen shows multiple historical records (M1, M2, M3) with cumulative (CUM), average (AVC), and maximum (MAX) values, along with the monitoring mode runtime.]

Settings

Long-press the settings button to enter the settings menu. Long-press the back button on the settings page to return to the monitoring page. Use the left and right buttons to navigate through settings options. Press OK to enter submenus, and long-press back to exit submenus.

Indicator Alarm and Buzzer Settings: Navigate to the indicator alarm settings and press OK to enter the submenu. Use the up and down buttons to select options and press OK to confirm. Use the left and right buttons to access the buzzer alarm settings and adjust the volume level with the up and down buttons.

[Image description: Two settings screens are shown: 'Indicator Alarm' with ON/OFF options, and 'Buzzer Alarm' with a volume slider.]

Dose Alarm Value and Unit Settings: Navigate to the current dose alarm value and press OK to enter the submenu. Use the left and right buttons to switch to cumulative dose alarm value and unit settings. Press OK to set the desired alarm value for current and cumulative doses. To set units, select the desired unit using the up and down buttons and press OK.

[Image description: Three settings screens are shown: 'Current Dose Alarm Value', 'Cumulative Dose Alarm Value', and 'Unit setting' with options for uSv/h, uGy/h, mR/h, CPS, CPM.]

Sleep Mode and Auto Shutdown Settings: Navigate to the automatic shutdown settings. Use the up and down buttons to select 'ON' or 'OFF' and press OK to confirm. If 'ON' is selected, press OK again to set the sleep time or auto-shutdown time using the up and down buttons.

[Image description: Two settings screens are shown: 'Sleep Settings' with ON/OFF and time options, and 'Auto Shutdown' with ON/OFF and time options.]

Language, Backlight, Factory Reset, and Device Information: Navigate to backlight, factory reset, and device information settings.

• Language: Use the up and down buttons to select the desired language and press OK.
• Backlight: Adjust the backlight brightness using the up and down buttons.
• Restore Factory Settings: Use the up and down buttons to confirm the selection and press OK to restore factory settings.
• About Device: Displays the device model, version number, and other information.

[Image description: Four settings screens are shown: 'Language' with multiple language options, 'Backlight' with a brightness slider, 'Restore Factory Settings' with Confirm/Cancel options, and a screen showing device information.]

Radioactivity Unit Conversion

International Standards (1990):

• Radiation workers: 20 mSv/year (10 µSv/hour)
• General population: 1 mSv/year (0.52 µSv/hour)

Unit Conversion:

• 1 µSv/h = 100 µR/h
• 1 nC/kg·h = 4 µR/h
• 1 µR = 1 γ (unit used for surveys in the nuclear industry)

Radioactivity:

• 1 Ci = 1000 mCi
• 1 mCi = 1000 µCi
• 1 Ci = 3.7 × 10¹⁰ Bq = 37 GBq
• 1 mCi = 3.7 × 10⁷ Bq = 37 MBq
• 1 µCi = 3.7 × 10⁴ Bq = 37 KBq

Exposure:

• 1 R = 10³ mR = 10⁶ µR
• 1 R = 2.58 × 10⁻⁴ C/kg

Measurement Equivalent:

• 1 Sv = 10³ mSv = 10⁶ µSv
• 1 Sv = 100 rem
• 100 µrem = 1 µSv

Radon Unit:

• 1 Bq/L = 0.27 em = 0.27 × 10⁻¹⁰ Ci/L

Absorption Measurement:

• 1 Gy = 10³ mGy = 10⁶ µGy
• 1 Gy = 100 rad
• 100 µrad = 1 µGy

Other:

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

Calculation of Radioisotope Decay:

A = A₀ e^(-λt), t = T₁/₂

• A₀: Initial activity of the source (initial amount of radioactivity)
• t: Time elapsed since the known time of source A, calculated based on the radioactive decay table.

Relationship Between Radiation Source and Distance

The intensity of a radioactive source is inversely proportional to the square of the distance.

X = A · Γ / R²

where:

• A: radioactivity of the point source
• R: distance from the source
• Γ (gamma): exposure rate constant

Note:

• Ra-226 (t₁/₂ = 1608 years), Γ = 0.825 R·m²/hour·curie
• Cs-137 (t₁/₂ = 29.9 years), Γ = 0.33 R·m²/hour·curie
• Co-60 (t₁/₂ = 5.23 years), Γ = 1.32 R·m²/hour·curie

Calculation of Radiation Protection based on Radioactive Decay Table:

Notes

Nuclear radiation detectors are precise instruments; please take care of them. The following recommendations will help maintain the device and extend its lifespan.

Product Maintenance

• Keep the device dry and clean any surface dirt with a soft cloth before use. Do not use cleaning agents or solvents.
• Handle the device with care to prevent drops or impacts that could cause damage.
• When the display shows a low battery level, recharge it promptly. Significant voltage drops may cause abnormal device behavior, such as failure to turn on/off or screen malfunctions.
• If the device is not functioning correctly, contact the service department or send it for repair.
• Keep the device dry and clean any surface dirt with a soft cloth before use. Do not use cleaning agents or solvents.
• Recycle damaged devices, accessories, and packaging materials in accordance with environmental regulations.
• Turn off the device when not in use for extended periods.
• Do not attempt to disassemble or modify the device's components without authorization to prevent malfunctions.
• Store the device in a dry place when not in use.

Contact Us

Any FNIRSI user contacting us with inquiries will receive a satisfactory solution and an extended 6-month warranty as a token of appreciation for their support!

We have also created an interesting community. We invite you to contact FNIRSI staff and join us.

Shenzhen FNIRSI Technology Co., LTD.

Address: West of Building C, Weida Industrial Park, Dalang Street, Longhua District, Shenzhen, Guangdong

E-mail:

• Business Inquiries: fnirsiofficial@gmail.com
• Device Service: fnirsiofficialcs@gmail.com

Phone: 0755-28020752 / +86 135 3688 4686

Web: www.fnirsi.cn

Illustrative Photos

[Image description: Various photos of the FNIRSI GC-02 device, its packaging, accessories, and internal components.]