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\rFD-3017A RaA<\/span>測氡儀（土壤測氡儀）除了應用于放射性找礦的射氣測量及水化找礦的水氡濃度測定外，還可應用于建筑工程土壤氡檢測及尋找地下水源、地震預報、環境保護及科研教學等部門的測氡工作。儀器可直讀計數率，經權威計量部門標定后經換算給出<\/span>Bq/m^{3<\/sup><\/span>。<\/span><\/span> \r<\/p>\r}

\r主要特點<\/span><\/b><\/span><\/b> \r<\/p>\r

\rFD-3017A RaA<\/span>測氡儀（土壤測氡儀）是一種新型的瞬時測氡儀器，它利用靜電收集氡衰變的**代子體－<\/span>RaA <\/span>作為測量對象，定量測量土壤，或水中氡濃度。其特點是沒有探測器污染問題，也不存在氡射氣的干擾影響，并且具有較高的靈敏度，操作簡便，現場可獲取結果（一般需<\/span>5<\/span>分鐘**<\/span>3<\/span>分鐘完成一個點的測試工作，相對國外產品工作效率提高近<\/span>10<\/span>倍）。是國內土壤氡檢測**進的測試儀器。<\/span> <\/span> \r<\/p>\r

\r主要技術參數<\/span><\/b><\/span><\/b> \r<\/p>\r

\r1.       <\/span><\/span><\/span>極限探測靈敏度：小于<\/span>0.37Bq/L<\/span> \r<\/p>\r

\r2.       <\/span><\/span><\/span>抽氣泵密封性能：在<\/span>700mm<\/span>泵柱時，漏氣速率≤<\/span>20mmHg/<\/span>分<\/span><\/span> \r<\/p>\r

\r3.       <\/span><\/span><\/span>探測器：金硅面壘探測器，直徑Φ<\/span>26 mm<\/span>，面積<\/span>531mm<\/span>^{2<\/span><\/sup> <\/span>\r<\/p>\r}

\r4.       <\/span><\/span><\/span>探測效率：<\/span>η_{2л<\/sub><\/span>≥<\/span>40<\/span>％（用<\/span>^{239<\/span><\/sup>Pu<\/span>源活性區直徑≤Φ<\/span>26mm<\/span>）<\/span><\/span> \r<\/p>\r}}

\r5.       <\/span><\/span><\/span>本底：≤<\/span>4<\/span>脈沖<\/span>/<\/span>小時<\/span><\/span> \r<\/p>\r

\r6.       <\/span><\/span><\/span>計數容量：<\/span>1<\/span>～<\/span>99999<\/span> \r<\/p>\r

\r7.       <\/span><\/span><\/span>儀器顯示：脈沖數、高壓指示標記（高壓啟動后，顯示**，結束后顯示<\/span>15<\/span>秒取片時間）、測量指示標記、低電壓欠壓指示標記、日期、時間<\/span><\/span> \r<\/p>\r

\r8.       <\/span><\/span><\/span>高壓及測量定時：<\/span>0<\/span>、<\/span>0.5<\/span>、<\/span>1<\/span>、<\/span>2<\/span>、<\/span>3<\/span>、<\/span>4<\/span>、<\/span>5<\/span>、<\/span>6<\/span>、<\/span>10<\/span>、<\/span>15<\/span>、<\/span>25<\/span>、<\/span>30<\/span>分鐘幾擋。其中<\/span>0<\/span>分鐘為手動測量，既高壓或測量將一直持續到手動停止為止<\/span><\/span> \r<\/p>\r

\r9.       <\/span><\/span><\/span>數據儲存：≥<\/span>300<\/span>個<\/span><\/span> \r<\/p>\r

\r10.   <\/span><\/span><\/span>具有預置系數和掉電保護功能<\/span><\/span> \r<\/p>\r

\r11.   <\/span><\/span><\/span>打印內容：脈沖數、<\/span>Bq/ m^{3<\/sup><\/span>、日期、時間<\/span><\/span> \r<\/p>\r}

\r12.   <\/span><\/span><\/span>儀器報警：高壓時間和測量時間報警<\/span><\/span> \r<\/p>\r

\r13.   <\/span><\/span><\/span>儀器能在溫<\/span>度－<\/span>10<\/span>℃<\/span>～＋<\/span>40<\/span>℃環境下及溫<\/span>度＋<\/span>40<\/span>℃相對濕度<\/span>95%<\/span>的氣候條件下正常工作，與常溫常濕條件相比，計數誤差≤±<\/span>10%<\/span> \r<\/p>\r

\r14.   <\/span><\/span><\/span>供電：三節<\/span>1<\/span>號電池，功耗≤<\/span>400mW<\/span>（包括高壓）<\/span><\/span> \r<\/p>\r

\r15.   <\/span><\/span><\/span>儀器尺寸和重量：操作臺：體積<\/span>210mm<\/span>×<\/span>97mm<\/span>×<\/span>156mm<\/span>，重量<\/span>2.3<\/span>公斤；抽氣泵：長<\/span>540mm<\/span>，直徑Φ<\/span>103mm<\/span>，重量<\/span>3.3<\/span>公斤<\/span><\/span> \r<\/p>\r<\/div>