| 仪器介绍 |
| 根据欧洲EN50366-2004标准设计 专用于家电及通讯产品的低频电磁场测量 符合ICNIRP OCC、ICNIRP CEN PUB、BGV B11标准的计权网络 可直接进行磁场测量(宽测量量程320μT、80mT) 自动⊙磁场暴露评估 100cm2高度三维磁场探头/三维输出/可连接频谱设备 频率：1Hz--400KHz The ELT-400 is an innovative exposure level meter for measuring magnetic fields in the workplace and in public spaces. The model is designed for health and safety professionals in industry, the insurance business and the service industry. The instrument can handle practically any level measurement requested in the lowand medium-frequency range, simply and precisely. It is comparable to the sound level meters that are commonly used in the assessment of noise at the workplace. Production Area The ELT-400 is useful with diverse machinery used in manufacturing. This includes induction heating, melting and hardening equipment. Also – thanks to the extremely low frequency limit and high power capability – most magnetic stirrers can be measured. Special demands often occur with machinery in production areas where non-sinusoidal signals are common, e.g. in industrial applications that use resistance welding machinery (pulse waveform, phase angle control) with traditional 50/60 Hz systems as well as in newer medium-frequency switching units. General Environment In public spaces, complex fields occur with several kinds of electronic article surveillance systems. Most of the electromagnetic and acustomagnetic gates are operated in the frequency range of the ELT-400. EMC Test House Magnetic fields generated by household appliances or other electrical devices are receiving increased attention. Some new standards such as prEN 50366 describe how to investigate such products. The ELT-400 is the ideal measuring device when it comes to compliance with these standards. Benefits include the perfectly matched frequency range and implementation of the specified transfer function. The aim of this new generation ELT-400 is to greatly simplify the assessment process. With the EXPOSURE STD (Shaped Time Domain) mode, the instrument achieves a new standard in simple but reliable measurement of magnetic fields, whether straightforward or in very complex field environments. Time-consuming and easily misinterpreted measurements with a spectrum analyzer or a scope are rendered obsolete. Detailed knowledge about the evaluation procedure or the field waveform or frequency is no longer needed. The results are reliable, and speed and ease of use are significantly improved over all traditional methods. BASIC OPERATION The ELT-400 covers the wide frequency range of 1 Hz to 400 kHz. The measurement range of the ELT-400 is far beyond the reference limits of common guidelines. The instrument has an external isotropic magnetic field probe with a 100 cm2 cross-sectional area. This is suitable for standards-compliant measurement even in inhomogeneous fields. The ELT-400 has a rugged housing and is easy to operate using only six buttons. The measurement result and the instrument settings are clearly displayed on a backlit LCD display. An optional probe extension cable is especially designed for low influence on the frequency response and sensitivity of the instrument. The cable is a good choice in cases where the probe and instrument must be handled separately. Variants of the ELT-400 are available with different combination of the operating modes, e.g. “Exposure STD” or “Field Strength”. Please refer to the Ordering Information section for details.  |
