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| Main features(主要性能) |
High resolution and accuracy(高分辨、高精度) |
Low noise(低噪声) |
Low time shift of the acquired data and Low temperature offset (低漂移) |
Convenience of installation and service (操作简单) |
Automatic operation control (自动操作控制) |
Satellite synchronization(卫星同步) |
IAGA2002 formatted 1-sec and 1-min dataIAGA2002格式(秒级和分级数据) |
Deep suppression of the power mains interference强抗(电源)干扰能力 |
LEMI-025是专门为标准秒级国际地磁台站而设计的超稳定三分量磁通门磁力仪。为了实现这一设计,我们在频率响应、采样同步精度、温度漂移、稳定性和抗噪音能力方面进行了专门研究。特别解决响应速度与抗工业干扰之间的矛盾方面采用了一种特殊的模拟和数字滤波器的。磁通门的材料决定了磁通门的稳定性和噪音级别,经很多的实验,我们选用了经过特殊技术处理的大理石材料,该材料在任何温压条件下都不会发生变形。
TECHNICAL SPECIFICATIONS(技术参数) | Automated offset compensation band along each magnetic component自动补偿范围 | ± 70 000 nT | Measured range of magnetic field variations动态测量范围 | ± 4000 nT | Resolution along each component: 分辨率 at the display 显示分辩率 in 1-second and 1-minute data files 1秒和1分数据分辨率 in 0.1-second file and Flash card data 0.1秒和存储数据分辨率 | 0.1 nT 0.01 nT 0.001 nT | Frequency band 频宽 | DC – 3.5 Hz | Temperature drift 温度漂移 | < 0.2 nT/°C | Output noise in frequency band (0.01 – 1) Hz频宽在(0.01 – 1) Hz时的输出噪音 | < 0.01 nT rms | Magnetic sensor components orthogonality 磁场分量正交误差 | < 30 min of arc | Sample rate 采样率 at the magnetometer digital output and FLASH card数字输出以及存储数据的时间间隔after PC software digital filtration经过计算机处理可得到 | 10 Hz
1 per second 标准妙级 1 per minute 标准分级 | Error of synchronization with UTC time 与UTC的时间同步误差 | < 10 ms | Volume of the removable Compact FLASH memory card 闪存卡容量 | 2 GB | Digital output 数字信号输出 | RS 232 | GPS timing and co-ordinates determination | GPS定时和坐标定位 | Operating temperature range 工作温度 | -10 to +40° C | Power supply 电源电压 | 10~15 V | Power consumption 功耗 | < 4 W | Weight 重量: sensor with 10 m cable 磁通门重量(包括10m电缆) electronic unit with cables 主机重量(包括电缆) GPS antenna with 15 m cable 15mGPS 天线 | 3.3 kg 3.8 kg 0.7 kg |
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