MODEL 200SB MODEL 200SB HTO便携式氚监测器
200SB是一款低成本、轻量的便携式氚监测器。前板仅有三个控制键，一个“开-关-样品"开关和设定报警值的开关。无需零点调整。200SB在0℃ 至+50℃温度范围内显示无零点漂移.大容量泵和快速电子学的结合使得此款仪器各种反应快速。
SENSITIVITY, RANGE, SPEED OF RESPONSE
灵敏度，量程及反应速度
This instrument is useful where measurement sensitivities of the order of 10 μCi/m3 (1 MPCA)
is sufficient, and where wide range, and fast response are needed. This low cost portable
model has a 4 ½ digit LCD display for reading from 0 to 19,999 MPCA.
此款仪器适于测量灵敏度要求达到10μCi/m3 (1 MPCA)，需要宽量程及快速响应的地方，
此低成本型号有4 ½ 数字LCD显示读数从0到19,999 MPCA.
CONVENIENT FOR USE
方便使用
This instrument needs no zero adjustment. It is ready for use by merely selecting the desired
alarm level and activating the instrument power.
此款仪器无需零点调整，仅需选择所要的报警水平值并接通电源，就准备使用了。
The initial power surge transient will disappear in a minute; the readings will then be accurate.
初始电浪涌瞬时一分钟内消失，然后读数将精准显示。
GAMMA COMPENSATION
伽马补偿
The use of twin, side by side, or coaxial ionization chambers provides good gamma
compensation in moderate background gamma radiation fields.
使用并列双室，同轴电离室在中本底伽马 辐射场提供了很好的伽马补偿.
FAST RESPONSE
快速响应
The use of a large pump, 3 liters a minute, together with fast electronics yields an
overall measurement time constant of under 5 seconds.
使用大容量泵，3升每分钟，加上快速电子学使得整个测量时间常数在5秒以下
HTO DISCRIMINATION
氚识别
An HTO discriminating version is available. By addition
of an external desiccant column, this instrument will specifically
measure HTO in the presence of HT, or other radioactive gases.
HTO识别款型有供应，通过添加外部干燥柱，这款仪器将专门测量以
氚气或其它辐射气体形式出现的HTO。
PERFORMANCE SPECIFICATIONS 性能规格
MEASUREMENT RANGE 10-199,999 μCi/m3, basic sensitivity of the order of 10 μCi/m3
测量范围 10-199,999 μCi/m3, 基本灵敏对达到10 μCi/m3
DISPLAY 0-19,999 digits, LCD panel meter
显示 0-19,999数字LCD面板仪表
GAMMA COMPENSATION two chambers in a side by side arrangement
伽马补偿 双电离室， 并列放置
RESPONSE RATE 5 seconds to reach 90% of final reading
响应率 5秒达到最终读数的90%
NOISE LEVEL ±10 μCi/m3, 1 S.D. (3 second electronic time constant)
噪音水平 ±10 μCi/m3, 1 S.D. （3秒电子时间常数）
ZERO STABILITY after 1 minute (or less) warm up, the zero drift to less than 10 μCi/m3
零点稳定 1分钟（或少于）预热后，零点漂移少于 10 μCi/m3
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