1. Product Description
The BH3206 α, β Surface Contamination Monitor is primarily used for the measurement of alpha (α) and beta (β) radioactive contamination on surfaces. Its applications include monitoring floors, clothing, workbenches, and other surfaces in various settings such as environmental radiation surveillance, nuclear power plants, isotope production facilities, hospitals, and reactor sites.
The system is composed of a detector (probe), an operating console, and a printer. It can simultaneously measure total alpha and total beta counts from surface contamination. Measurement results can be stored in the internal memory (MCU), printed on-site, or transferred to a computer for data processing and printing.
2. Main Technical Specifications
- Counting Capacity: 1 to 1,000,000 counts (10⁶)
- Measurement Time: 1 to 16,000 seconds
- Detection Efficiency:
- Alpha (α): εα ≥ 30% (Condition: 2π geometry, with a Ø50mm ²³⁹Pu planar source)
- Background: ≤ 2 cpm (counts per minute)
- Beta (β): εβ ≥ 30% (Condition: 2π geometry, with a Ø50mm ⁹⁰Sr-⁹⁰Y planar source)
- Background: ≤ 120 cpm
- Alpha (α): εα ≥ 30% (Condition: 2π geometry, with a Ø50mm ²³⁹Pu planar source)
- Long-term Stability: ≤ ±10% (Condition: 8-hour continuous measurement with ²³⁹Pu and ⁹⁰Sr-⁹⁰Y sources, for total counts > 1000)
- Measurement Error: < 20%
This instrument does not support hot-swapping for its probe. I accidentally hot-plugged it, which caused the internal operational amplifier (op-amp) to burn out. After I replaced the damaged op-amp, the monitor was fully repaired and is now working correctly.
1. 简介
BH3206型α、β表面污染测量仪主要用于环境辐射、核电站、同位素生产、医院、反应堆场所的地面、衣物工作台、地板等表面的α、β放射性污染的测量。由探测器、操作台和打印机组成。可同时测出污染物表面总α、总β计数；测量结果可以存入单片机中，可现场打印结果，也可将结果输入计算机，通过计算机打印出来。
计数容量：1～106
2. 主要技术性能
测量时间：1～16000s
探测效率α：εα≥30%(2л，Φ50mm，239Pu面源)
本底≤2cpm
β：εβ≥30%((2л，Φ50mm，90Sr-90Y面源)
本底≤120 cpm
长期稳定性：≤±10%（239Pu，90Sr-90r；8h；计数＞1000）
误差：＜20%。
由于这个仪表不能热插拔探头，我在热插拔后导致内部的运算放大器烧毁，换掉后复原。
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