Related Manuals for Deepace KC761 Series
Summary of Contents for Deepace KC761 Series
- Page 1 Multifunctional handheld nuclear radiation meter (Gamma-Spectrometer and Radiation Dosimeter) KC761x User Manual Support version FW V1.2 HW V1.2 科新社...
- Page 2 Executive Summary This manual introduces the concept and basic principle of energy spectrometer, and provides a comprehensive explanation of the structure, functions and usage of the KC761x energy spectrometer. Development Team Chief Engineer Tao Le Engineers Li Yun, Yuan Xinzhi, Chen Wei Consultant Experts Shi Congwei, Xu Nuo, Yang Tianhao, Ke Wei KC761x Multifunctional Handheld Energy Spectrum Analyzer User Manual...
- Page 3 Security matters In this brochure: "Dangerous" means a matter that may result in personal injury; "Warning" means a matter that may lead to the loss of equipment or a major error; "Important" refers to a statement that requires special attention. Dangerous Remove the sensor module.
- Page 4 Disclaimers This instrument is a professional device, not a consumer product, and the rules for consumer products do not apply. To the extent permitted by law, the maximum liability of the manufacturer shall be the purchase price, regardless of damages, and shall not be liable for any loss of time, business, inconvenience, profit, abuse, or any consequential damages.
- Page 5 manual. * * * Packing list Spectrometer………… 1pc Carrying rope…………1pc User manual ………… 1copy Power supply method One of the following power supply methods can be used a. (1) 5AA NiMH battery × 3, nominal voltage 1.2V. (2) 5AA/LR6 dry cell batteries×3, including carbon, alkaline batteries and disposable lithium-iron batteries with a nominal voltage of 1.5V;...
- Page 6 Not suitable for applications requiring extremely high reliability. This instrument may go down or malfunction under certain types and intensities of radiation exposure. Warranty The instrument is guaranteed for 1 year or an accumulated dose of 10Gy, whichever comes first. The warranty period of the optional sensor is determined separately.
- Page 7 The repaired equipment must not be radioactive or contaminated with other dangerous substances, and the activity of induction radioactivity must not exceed 2.5nCi, otherwise the user will be held responsible. Environmental Protection This instrument contains plastic housing, circuit board and its attached electronic components, metal parts (brass, iron and nickel, tin plating), glass, silicone rubber seals and scintillation crystals and other parts.
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Page 8: Table Of Contents
Table of Contents 1、 Overview ............................1 1.1、 Principle of energy spectrometer ..................2 1.1.1、 Scintillation detector .................... 3 1.1.2、 Semiconductor detectors ..................4 1.1.3、 Multi-channel analyzer ..................5 1.2、 Energy resolution ....................... 7 1.3、 Dose rate ........................... 8 2、 Features and functions of the instrument ..................10 2.1、... -
Page 9: 1、Overview
1、Overview An energy spectrometer is a powerful radiation testing instrument, usually used to test the energy and magnitude of rays. The common Geiger counter is an old and simple instrument, which usually can only determine the magnitude of the radiation and provides very limited information. -
Page 10: Principle Of Energy Spectrometer
as they pass through the medium, so different test environments will result in different energy spectra, and measurements in vacuum are usually recommended. And it can be roughly assumed that the γ-rays are only attenuated in size, and the energy always remains the same. In the case of visible light, for example, size (magnitude) refers to how bright the light is;... -
Page 11: Scintillation Detector
(2) The use of a semiconductor to convert radiation into a moveable charge, and the relatively direct measurement by measuring the amount of charge transferred, is called a semiconductor detector. This instrument uses the first method for γ-rays and neutrons (optional) and the second method for α... -
Page 12: Semiconductor Detectors
electronic circuitry performs charge-to-voltage conversion (Q-V conversion), pulse shaping (pole-zero phase elimination, S-K filtering), and peak hold, and then sends it to the ADC for sampling. After the ADC completes one sampling, the CPU immediately resets the analog circuitry and waits for the next pulse to arrive. In the extreme case, 30,000 pulses can be collected per second, which corresponds to a dose rate of approximately 0.3 mGy/h. -
Page 13: Multi-Channel Analyzer
energy β-rays, but not the common α-rays. If you need to measure α-rays or lower-energy β-rays, you have to remove the plastic sheet. At this point, only the Mylar film inside the window remains in front of the PIN tube, and higher-energy α-rays can pass through, although they will lose energy and quantity. - Page 14 Long ago there was a need in physics to count the number of pulses of a specific voltage in order to detect a specific event. People made a counting device that outputs a counting pulse to drive a totalizer when pulses of a specific voltage range are input (various approaches existed in the early days, such as a mechanical device driven by a solenoid, a voltmeter head that converts to an integral voltage and then drives the scale as a quantity, etc.).
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Page 15: Energy Resolution
the optoelectronic device, and the acquisition circuitry, and there is some nonlinearity, which usually requires function fitting. Different sensors have different fitting curves and need to be calibrated at the time of production to solve for the coefficients of the function. With these coefficients, the channel address can be converted to energy and the transverse coordinates can be rearranged in linear or logarithmic energy to obtain an energy spectrum plot. -
Page 16: Dose Rate
are now becoming popular for cadmium zinc telluride (CZT) materials, and high-purity germanium detectors (for γ-rays) are still the highest resolution. However, these detectors are more expensive, and some require high- voltage power supplies or refrigeration, and cannot be used for the time being in products such as the KC761x, which aims at widespread availability of the new technology. - Page 17 there will always be some that enter the threshold and are counted, resulting in large errors in the background count rate and dose rate. （2）Effects of radiation intensity The scintillation counter is only suitable for a narrow range of radiation intensities, with a dynamic range wider than that of a normal Geiger counter, but narrower than that of a Geiger counter with the waiting time technique (TTC).
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Page 18: 2、 Features And Functions Of The Instrument
2、Instrument features and functions The parts of the instrument are shown in the figure below: 2.1、Features of the instrument （1）Feature-rich Equipped with 2.54cm cesium iodide (thallium) scintillation detector and 9mm PIN detector as standard, it can measure α, β and γ rays. Each sensor has a separate multi-channel analyzer, all of which can perform spectral analysis and counting. -
Page 19: Sensor
connecting to a computer or mobile app. （4）Full range of interfaces With Bluetooth and RJ45 network interface, it can be connected to cell phones and computers, and can be remotely observed through the cloud platform (optional). RJ45 interface supports POE power supply, no need to set up another power line, convenient for deployment construction. -
Page 20: The Performance Of The Instrument
With the exception of the PIN detector, the sensors have built-in memory that can be automatically recognized by the instrument and loaded with the calibration data from it. Do not attempt to disassemble the sensor and do not squeeze the sensor housing. - Page 21 Amplitude scale: count rate is provided for relative measurement, absolute accuracy is not guaranteed, and users can calibrate it by themselves. Counting rate nonlinearity ≤ 10% (in sensitive energy range, at 10cps to 5kcps). Energy scale with PIN sensor is just specific α-rays, not for β and γ rays. Energy scale of α-rays at 23±5℃: (1.5MeV～6MeV).
- Page 22 The expected endurance time when using alkaline dry batteries under γ-Ray Sensors Other sensors Regular state L1/L2 Power saving state 10d/20d natural background radiation environment is as follows: Note: Backlight, vibration, bluetooth, RJ45 interface OFF, Low volume. （10）Environmental parameters Temperature range: -10～50℃ (normal use); -30～65℃ (no guarantee of performance, of which, the LCD display fails below -10℃).
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Page 23: 3、 Installation Of The Instrument
3、Instrument installation The instrument is shipped without batteries. If the instrument is used as a fixed sensor, it can be used without batteries and powered by USB or POE only. If used as a portable test device, batteries should be installed. 3.1、Battery installation The battery cover has a waterproof seal and is blocked by a back clip. - Page 24 drag the battery cover and pull it out. Load three 5AA batteries according to the direction marked in the battery box. Pay attention to the shape of the spring is normal to avoid being pressed under the batteries. Reinstall the battery cover in the reverse order. Battery cover is more difficult to install, first plug the tail lug into the positioning hole, and then press close to the screw side with force several times, while paying attention to the state of the waterproof seal.
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Page 25: Fixed Installation
so as not to lose time and cause the time scale of stored data to be misaligned. 3.2、Fixed installation If you need to fix the instrument in a certain position for long-term monitoring, etc., you can remove the back clip and fix it using the screw holes of the back clip. -
Page 26: Enabling The Network
3.4、Enable Network(Bluetooth) The connection function of the instrument is off by default, and should be turned on in the software if you need to use it. Power on → FUNC → Network setting → RJ45 or Bluetooth → On. It works in the default way after the first opening, and you can modify the setting by yourself. -
Page 27: 4、Operation Guide
any sound card. The headphones should be slowly placed close to the ear to feel the sound level. The interface is more fragile and should be avoided under stress. 4、Operation Guide This guide focuses on the human-machine interaction and operation logic of the instrument, and it is recommended that users read it completely. - Page 28 LCD screen and the backlight can be turned off at any time. When the backlight is turned on, it will increase the power consumption by about 3mA, and the battery life will be significantly shortened. The layout and functions of the keyboard are shown in the following figure: （1）Power Switch Press and hold the power switch for 0.2 seconds to power on in the off...
- Page 29 （3）System Settings（FUNC） Press the key to enter the system configuration menu, press the "-" and "+" keys to switch the setting items (with cursor prompts). （4）Store results（SAVE） Short press to store the current spectrogram, spectral table, dose rate table and accumulated dose into TF card. Long press to turn on the automatic storage function, and store the spectrogram and number table into TF card by fixed time interval.
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Page 30: Function Description
（9）Pulse indication When using a PIN or neutron sensor, the pulse indicator flashes immediately when the sensor receives radiation particles. For scintillation detectors, the pulse indicator flashes once every 8 to 64 pulses, in line with the buzzer, due to the high count rate. This indicator also use to increase the battery charge(only for KC761B) （10）Alarm indication The alarm indicator flashes when the set alarm conditions are reached. - Page 31 effect only when the battery is used. If USB power or POE power is connected, the APS and APO functions hang automatically and take effect again after the external power supply is removed. In the power saving state, it returns to the regular state if external power is connected.
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Page 32: Basic Model
the power saving state is awakened by strong radiation, if the radiation is reduced to below the alarm threshold, the instrument enters the power saving state again after a set time. For the total dose rate alarm, it will be in the regular state for a long time after waking up, until the accumulated dose is cleared or the alarm threshold is adjusted upward, so that the alarm can be eliminated before entering the power-saving state again. -
Page 33: Sensor Selection
larger. Only one sensor can be used in this mode. If a scintillation detector is used and its range is exceeded, it automatically switches to strong radiation mode and the dose rate curve is updated as usual. 4.2.3、Sensor Selection In Energy Spectrum Priority and Dose Priority modes, press and hold the MODE key to enter the sensor selection menu. - Page 34 glass detectors, the general alarm setting range is 1 to 99Cps (default 1Cps), the serious alarm setting range is 0.1 to 9.9kCps (default 0.1kCps). To avoid random rise and fall caused by false alarms, the number of Cps detected by the alarm needs to be higher than the threshold value for at least 6 seconds within 8 consecutive seconds.
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Page 35: Nuclide Identification
The switch and threshold of the alarm function are set in the alarm submenu under the FUNC menu. 4.2.5、Nuclide identification Radioactive isotopes emit rays with specific energies. By measuring the energy of the rays, the spectrometer can identify the isotope that produces the rays. - Page 36 very high cue lines appear when the cursor moves to the first characteristic peak, while the symbol Lu is displayed. since the second characteristic peak also coincides exactly with the cue lines, it can be assumed that the radiation originates from Lu.
- Page 37 accumulate enough counts first to smooth the curve. It is generally recommended that the number of counts be 30kCt or more, the more the better. Many isotopes produce radiation in the low-energy region (<250keV), resulting in a very crowded low-energy region, even one energy corresponding to multiple nuclides.
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Page 38: Menu Settings
do not overlap completely, and there is a difference of a few tens of keV, which makes it likely that the rays are from a cobalt source. When the cursor coincides with the rightmost peak, the Na cue line appears, but there is no peak on the right contour cue line at all, so the presence of 24Na can be ruled out. -
Page 39: Mode Menu
spectrum priority mode, using the first registered sensor. 4.3.1、MODE menu Short press MODE to enter the mode selection menu, and short press MODE again to return to the mode main menu of the current mode. The mode selection menu is shown in the table below. Option Name Function... - Page 40 The [First Level Menu] SPEC menu has the following options: Option Name Function Notes Enter the cursor control menu after MARKER Cursor With subordinate menu pressing the key Coordinate Set the type of coordinates and their SCALE With subordinate menu settings size Enter the clear graphics confirmation...
- Page 41 The [Secondary Menu] Scale/SCALE menu options are as follows: Option Name Function Notes Zoomed out Increase the coordinate span and make the graph smaller ZoomOut spectrogram Enlarge Decrease the coordinate span and make the graph bigger ZoomIn Spectrogram Vertical axis Adjust the logarithmic or linear display, and change to LIN mode after pressing the key.
- Page 42 Cursor Auxiliary Cursor-assisted recognition after key MANU Switches press Choose one or the Automatic Automatic recognition after key press other, visible AUTO identification switch Turn nuclide Turn off nucleus recognition after key recognition press BACK Return Return to [secondary] CONFIG menu UNIT Settings Page Contents Option Name...
- Page 43 you should operate in the upper menu to clear it. After pressing the Save Background option, if the total count of the current spectrum is more than 100kC, it will prompt on the secondary confirmation dialog box that the old background data will be overwritten and the Confirm/OK and Cancel/CANCEL options will be displayed;...
- Page 44 BACK Back Return to mode main menu Dose priority mode and energy spectrum priority mode, the sensor can be set separately and remain valid after reboot. The [Secondary Menu] Cursor/MARKER menu options are as follows: Option Name Function Notes Peak Find Find the peak in the display area from left to NextPeak right...
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Page 45: Func Menu
its moment of occurrence for the past 15 min are counted once before each storage (the peak and moment since the last count are counted at the moment of power off). The dose continues to accumulate the next time the machine is turned on. Which can store 2880 peak by 15min (about 1 month) and overwrite the old data if it exceeds. - Page 46 the FUNC menu. The contents of the FUNC menu are listed in the following table. Menu Item Name Function Toggle between English and Chinese. The Language Language Setting language of the menu name is mutually exclusive with the actual activation language. Set by year, month, day, hour, minute and second, in two levels of activation.
- Page 47 Count Blink Flashing light setting On, Off ALARM Alarm function settings Pressure sensor Selection of barometric pressure or altitude Pressure or ALT display Pressure Unit Set barometric pressure unit mmHg,hPa,Psi ALT Unit Set altitude unit m,ft altitude correction ALTsft Set correction value in m, ±999.9m amount Equivalent to the selection made after long Radiation Sensor...
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Page 48: Other Matters Requiring Clarification
accumulated dose is 7601, and a specific 8-digit - and + key sequence needs to be keyed in to access the Restore Factory Setting secondary confirmation page. The password sequence is: - + + + - + - -. This sequence cannot be changed. -
Page 49: Usage Tips
4.5、Usage Tips This section notes tips for use, and newer versions of the user manual may include more content. 4.5.1、Optimal incidence direction and distance This device can be installed three sensors, except for the PIN detector is not interchangeable, and two other sensor compartments can be installed with the various types of sensors. - Page 50 to be shot through the window of the housing in order to avoid being blocked by the housing. The best direction of incidence is shown in the figure below. The left figure is suitable for detecting γ rays, and the right figure is suitable for detecting α...
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Page 51: Finding Unknown Sources
it will not affect the measurement. It should be noted that excessive radiation can cause peak drift beyond the nominal uncertainty range for KC761(no model letter version). The higher the count rate and the higher the ray energy, the more severe the drift. KC761A/B model use a ses a very sophisticated circuit technique to eliminate this drift. -
Page 52: Protection Of The Quality Of The Energy Spectrum Map
measurements. The optimal direction of incidence of the PIN sensor is also the sensitive direction. For X rays or γ-rays, the instrument is sensitive to radiation from any direction, and the optimal direction of incidence indicates only the ideal direction for measuring the energy spectrum. For low-energy γ-rays, because the scintillator is not spherical, rays coming from the side will pass through a larger cross-sectional area and the count rate may be slightly higher than the optimal incidence direction. - Page 53 spectrum, the following techniques should be observed in addition to the direction and distance. (1) The measured source should be as bare as possible, without unnecessary blocking, especially with heavier metal blocking. The rays will interact with the blockage, causing distortion of the energy spectrum. Iron, stainless steel, lead can cause deterioration of the energy spectrum, even if it must exist, it should be as thin as possible.
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Page 54: 5、Maintenance
5、Maintenance This product does not normally require special care, but there are still some issues that need attention in order to keep the instrument in good condition. 5.1、Stability of the energy scale As described in Chapter 1, the gamma spectrometer corresponds c-ray photons to data through flash, photoelectric conversion, charge-voltage conversion, pulse shaping, and analog-to-digital conversion. - Page 55 manufacturer for calibration if necessary. The revised method is such that if there is only one known source, e.g. Cs, then only the energy scaling would be set. Measure the known source with the instrument and read the peak energy use maker peak find function. Divide the known energy of that source by the energy read to get the scaling factor.
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Page 56: Using Batteries
as potassium chloride allows the 40K peak to be seen within 1 hour. Using two peak revisions, the accuracy was close to that of sending it back to the factory for calibration. 5.2、Use of batteries The instrument uses three AA batteries in series with a rated operating voltage of 4.5V. -
Page 57: Use Of External Power Supply
When using AA non-rechargeable dry cell batteries, the external power supply can be turned on only for a short period of time (<30min). Prolonged charging of dry cell batteries may be dangerous. Remove the batteries if the external power supply is to be used permanently. If the instrument is not used for a long time, the battery should be removed. -
Page 58: Other Notes
shielding layer, and the shielding layer is properly grounded. POE power quality should also pay attention to avoid the conduction of high-frequency interference. The KC761A/B turns on the charging function by default. The instrument starts charging the battery immediately after connecting to the external power supply. - Page 59 (7) Do not disassemble the instrument. Because of the waterproof seal, the instrument is difficult to disassemble, if you need to add options, we recommend sending it back to the manufacturer for processing. (8) The instrument contains a very sensitive amplifier circuit, so please keep away from electromagnetic radiation.
- Page 60 KC761...
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