产品介绍
ETS 271 Conductive Suit Tester
Measures the screening efficiency of conductive suits worn by live working maintenance personnel on power transmission lines.
The ETS Model 271 Screening Efficiency Tester is a portable, battery-powered, instrument designed to accurately measure the screening efficiency in decibels (-db) in both field and laboratory environments. It performs nondestructive testing on any section of suit or test fabric that is at least 4” (10cm) in diameter. The higher the absolute reading the better the screening efficiency or conductivity of the fabric and thus lower the magnitude of the electric field on the wearer side of the fabric.
Features Include:
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Three screening efficiancy indicators (Poor, Marginal or Good for overall conductive effectiveness of material) with bar-graph reading in DB
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5kHz 400 Volt AC test signal
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Simple and quick self-calibration process
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Portable Battery powered unit is perfect for Field and Lab use, includes hard waterproof carrying case
Conductive suits are worn by service personnel while performing live working maintenance on power transmission lines and in substations. The suits are designed to shield personnel from low frequency electric fields emitted by the live parts. During the life of the suit the conductive fibers woven into the fabric begin to breakdown due to repeated laundering, and wear and tear in areas such as the seat, knees and elbows, thus slowly reducing the effective protection afforded to the wearer. The ability of the suit fabric to provide a shield for the wearer from these electric fields is a fabric property commonly referred to as “screening efficiency”.
Description:
The Model 271 Screening Efficiency Tester is a completely integrated, microcomputer-based instrument for laboratory and field use. The Tester consists of a 5 kHz, 400VAC transmitter plus a nesting receiver that contains the control, detection, processing, and display functions plus batteries. Both transmitter and receiver are contained in rugged aluminum housings, 4” (10cm) in diameter x 1.5” (3.8cm) and x 3.375” (8.6cm) respectively. The two units are connected by a 24” (60cm) cable. Measurements can be taken at virtually any non-seam location on the suit.
The Model 271 has better than -70db, of dynamic range (-18.1db to -91.9db). A 2-line alpha-numeric LCD display indicates the electric field strength with a bar-graph and interpretation of the signal as to whether the material is a POOR, MARGINAL, EFFECTIVE or GOOD shield. After approximately 2 sec. the actual screening efficiency is then displayed in -db. The instrument is self-calibrating. Prior to each test session the CAL button is momentarily depressed which calibrates the system. Performance is easily checked by first taking a measurement without fabric between the transmitter/receiver (-18db) and then with aluminum foil between the transmitter/receiver (-90db).
To measure a suit or test fabric, the desired section is placed between the transmitter/receiver. Prompts on the display walk the user through the measurement process. Each time the TEST button is depressed the triple indication will appear on the LCD display. The system is defaulted to define a fabric that has a screening efficiency greater than -50db to be considered GOOD, between -40 and -50db, EFFECTIVE, between -30 and -40db, MARGINAL and below -30db, POOR. Other default settings can be programmed as an option. The Model 271 may also be used for other applications where the screening efficiency of conductive fabric or thin films need to be evaluated.
The Model 271 Screening Efficiency Tester comes complete with transmitter/receiver, 2 spare 9V alkaline batteries, operating manual plus a dust/waterproof ABS carrying case.
ETS 271 导电套装测试仪，适用于带电输电工人安全
ETS 271 导电套装测试仪
测量带电工作维护人员在输电线路上穿着的导电服的屏蔽效率。
ETS 271 型筛选效率测试仪是一种便携式、电池供电的仪器，旨在准确测量现场和实验室环境中以分贝 (-db) 为单位的筛选效率。它对直径至少为 4 英寸（10 厘米）的西装或测试织物的任何部分进行无损测试。绝对读数越高，织物的屏蔽效率或导电性越好，因此织物穿着者一侧的电场强度越低。
功能包括：
三个筛选效率指标（材料的整体导电效率较差、边际或良好），在 DB 中具有条形图读数
5kHz 400 伏交流测试信号
简单快速的自校准过程
便携式电池供电装置非常适合现场和实验室使用，包括硬质防水手提箱
服务人员在对输电线路和变电站进行带电工作维护时穿着导电服。这些防护服旨在保护人员免受带电部件发出的低频电场的影响。在防护服的使用寿命期间，编织在织物中的导电纤维由于反复洗涤而开始分解，并在座椅、膝盖和肘部等部位磨损，从而慢慢降低对穿着者的有效保护。西装面料为穿着者提供屏蔽这些电场的能力是一种通常称为“屏蔽效率”的面料特性。
描述：
271 型筛选效率测试仪是一种完全集成的、基于微机的仪器，适用于实验室和现场使用。测试仪由一个 5 kHz、400VAC 发射器和一个嵌套接收器组成，该接收器包含控制、检测、处理和显示功能以及电池。发射器和接收器都包含在坚固的铝制外壳中，直径分别为 4” (10cm) x 1.5” (3.8cm) 和 x 3.375” (8.6cm)。两个单元通过 24 英寸（60 厘米）电缆连接。几乎可以在西装的任何非接缝位置进行测量。
271 型具有优于 -70db 的动态范围（-18.1db 至 -91.9db）。 2 行字母数字 LCD 显示屏通过条形图和信号解释来指示电场强度，以确定材料是“不良”、“边缘”、“有效”还是“良好”屏蔽。大约 2 秒后。然后在-db 中显示实际筛选效率。该仪器是自校准的。在每次测试之前，暂时按下 CAL 按钮以校准系统。首先在发射器/接收器之间进行无织物测量 (-18db)，然后在发射器/接收器之间使用铝箔 (-90db) 进行测量，可以轻松检查性能。
要测量西装或测试织物，需要将所需部分放置在发射器/接收器之间。显示屏上的提示引导用户完成测量过程。每次按下 TEST 按钮时，LCD 显示屏上都会出现三重指示。系统默认定义筛网效率大于-50db为GOOD，-40到-50db之间，EFFECTIVE，-30到-40db之间，MARGINAL和-30db以下，POOR。其他默认设置可以作为选项进行编程。 271 型也可用于需要评估导电织物或薄膜的屏蔽效率的其他应用。
271 型筛选效率测试仪配有发射器/接收器、2 节备用 9V 碱性电池、操作手册和防尘/防水 ABS 手提箱。
