Fellat XR1 Radiation Detector User Manual

Fellat XR1 Radiation Detector

Product Information

• Specifications
  • Sensor types: GM tube, Y AND X rays
  • Detectable types: Energy range
  • Sensitivity: 3&- 00.14 sv/h
  • Test accuracy: 7(3&- sv/h
  • Real-time range: $$ 00.000msv
  • Cumulative range: 100
  • Power supply: 50

Product Usage Instructions

• Basic Operation
  • The XR1 Geiger counter has the following keys:
  • Mute/alarm/particle sound select key
  • Power on key
  • Test/clear radiation trend key
  • Shutdown key
  • Backlight switch key
• Power Options
  • The Geiger counter can be powered in two ways:
  • USB Powered: Use the Type-C cable to connect the Geiger counter to a power source. The screen will be lit and ready to detect. Please note that the Geiger counter does not have a built-in charging function.
  • Battery Powered: Insert 3 AA batteries into the Geiger counter to power it.
• Technical Indicators
  • The technical indicators of the XR1 Geiger counter are as follows:
  • Sensor types: GM tube, Y AND X rays
  • Detectable types: Energy range
  • Sensitivity: 3&- 00.14 sv/h
  • Test accuracy: 7(3&- sv/h
  • Real-time range: $$ 00.000msv
  • Cumulative range: 100
  • Power supply: 50

FAQS

• Q: Can I use the Geiger counter without batteries?
  • A: Yes, you can use the Geiger counter by connecting it to a power source using the Type-C cable. However, please note that the Geiger counter does not have a built-in charging function.
• Q: What type of batteries does the Geiger counter use?
  • A: The Geiger counter uses 3 AA batteries.
• Q: What is the sensitivity of the Geiger counter?
  • A: The sensitivity of the Geiger counter is 3&- 00.14 sv/h.
• Q: What is the power supply requirement for the Geiger counter?
  • A: The Geiger counter requires a power supply of 50.

Instructions

Basic knowledge

• Nuclear radiation is also known as ionizing radiation, or radioactive radiation, it is the nuclear transition from one structure or energy state to another structure or energy state of the release of microscopic particle flow.
• Nuclear radiation can cause ionization or excitation of substances, thereby damaging the DNA strand of biological cells.

Detection principle:

• In 1908, German physicist Hans Geiger and British Rutherford jointly designed the world’s first Geiger counter.
• Twenty years later, Geiger and his student Miller further refined the counter so that it could detect all the ionizing radiation.
• This is the famous Geiger-Miller counter tube (GM tube for short).
• Because of its high sensitivity and wide detection range, it has been widely used in nuclear physics, medical research, environmental monitoring and industrial fields.
• The basic structure is a sealed tubular cavity with a high voltage of about 400 V applied at both ends.
• When a particle is injected into the cavity, it produces a single ionization and a pulse signal can be obtained.
• Background radiation also known as natural background, mainly contains cosmic rays and natural radio-nuclides in nature.
• Living on the earth’s surface, it is inevitable for us to passively accept background radiation all the time.
• Background radiation varies in different areas and at different altitudes.

Basic operation

1. Mute/alarm/ particle sound (ring once for receiving one particle to ring) select key.
2. Power on key
3. Test/ clear radiation trend key
4. Shutdown key
5. Backlight switch key
6. Icon status area
7. Power level display
8. Trend map display area
9. USB charging port
10. Charging indicator
11. Real -time dose display
12. Mean dose display
13. Cumulative dose display
14. Message window and operation prompt area
    • Real-time dose(REAL): Update once every second to quickly display the true value of each moment. The real-time value is automatically tested and displayed without operation after powering on.
    • Unit: μsv/h
    • Mean dose (AVG): The total dose received over some time is converted to an average display. Press the M key to recalculate the average.
    • Unit: μsv/h
    • Cumulative dose (ACC): Add all detected doses. Data is not lost after shutdown, and historical data continues to accumulate after powering on again. You can press both the L key and the R key at the same time to clear the accumulated value.
    • Unit: msv/h

USB Powered

USB Powered or Battery Powered:

1. The Geiger counter with a Type-C cable, you can use the charging cable without using the battery, just plug it in the socket and start to detect. ( It doesn’t have a charging function, please connect the USB cable to start the test. If you unplug the USB cable, the screen will not be lit. )
2. You can also use a 3 pcs AA battery.

How to use

How to use Geiger Counter?

1. Press and hold “ON” to switch on the device, and the screen will light up, press “M” to start the test.
2. In the detection, press “M” once to clear the red radiation trend value.
3. When the real-time value of “REAL” is around 0.5μsv/h, it belongs to the safe range.
4. When the “REAL” real-time value exceeds 0.5μsv/h, an alarm will sound, you can press “L” to switch off the alarm.
5. Press “R” to switch off the screen brightness.
6. Press the “L” key and “R” key simultaneously to clear the cumulative value.

Technical indicators

Due to the different dimensions and altitudes of different countries and regions, the national standards formulated are quite different. Please refer to your local national standards.

Questions and answers:

• Which scenarios are parameters used for?
  • Answer: When we need to take emergency shelter, such as visiting nuclear-contaminated sites such as Fukushima, Japan, or conducting radioactivity experiments in the laboratory, we need to know the basic radiation intensity quickly and we just need to check the real-time value. When it is necessary to test the decoration environment with suspicious radioactive materials, such as marble, or artificial stone, there is no time urgency, but we need to pay attention to accuracy, we should check the average. When people are exposed to radioactive materials or the environment for a long term, such as radiologists, and radiopharmaceuticals management personnel, it is necessary to check the cumulative dose, and they can check cumulative value for months or years.
• Why cannot the value return to zero without strong radioactive material around? How to completely return to zero?
  • Answer: because of the background radiation, the instrument can’t return to zero. When it is placed in a sealed lead barrel, it will tend to zero (relating to the thickness of the lead barrel).
• Is the instrument itself radioactive?
  • Answer: The instrument can detect radioactivity︔ but it does not have radioactivity itself, it is used to detect based on the physical principle of the Geiger tube, and there is no difference from ordinary electronic products.
• What are the points we need to pay attention to?
  • Answer: To obtain high sensitivity, the glass wall thickness of the Geiger tube of the instrument is only 0.2 mm. It should be handled lightly to avoid falling and bumping, to avoid sensor failure.
• Is it right to say that it is harmful if it exceeds the standard and it is harmless if it does not exceed the standard?
  • Answer: The national standard only stipulates the upper limit of the effective dose absorbed annually. It does not mean that as long as it exceeds the national standard, it will do great harm, and it will be completely harmless if it does not exceed the national standard. The radioactive destruction of biological cells is highly random. There is no equivalent relationship. The general principle is that the less the better, the smaller the better.
• Why does the detector show a large dose of radiation when we take a plane?
  • Answer: When the plane flies at the height of 10,000 meters, the air is thin and the radiation intensity of cosmic rays is much higher than that of the earth’s surface. It is normal.

Support Center:

• [email protected].
• XR1 Radiation Detector

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