1. Built-in screw wiring, safe and convenient to use, sturdy and stable structure, suitable for long time work 2. Can be used in electrical power, telecommunications, machine tools, shipping, textiles, printing, mining machinery and other industries signal indication, alarm signals, accident signals, etc 3. Professional and practical design, beautiful appearance, easy to carry and use 4. Made of plastic surface, durable and wear-resistant 5. No signal input prompt message: display 000 6. This product is prohibited in the frequency conversion, high frequency, inverter, harmonic interference signal strong power environment, applicable to sine wave 50-60HZ AC frequency utility power Parameters: 1. Input voltage: AC 220V 2. Frequency test range: 3-120Hz 3. Accuracy: 2 percent +/-Hz 4. Display resolution: 1Hz 5. Sampling rate: about 1 time/s 6. Input circuit power consumption: less than 2VA 7. Ambient temperature: -25-55 degrees celsius 8. Overall dimensions: 73 x 73 x 52mm 9. Installation aperture: 68 x 68mm
1. 内置螺丝接线,使用安全方便,结构坚固稳定,适合长时间工作 2. 可用于电力、电信、机床、航运、纺织、印刷、矿山机械等行业的信号指示、报警信号、事故信号等 3. 专业实用的设计,外形美观,便于携带和使用 4. 表面塑料制成,耐用耐磨 5. 无信号输入时提示信息:显示000 6. 本产品禁用于变频、高频、逆变、谐波干扰信号强的用电环境内,适用正弦波50-60HZ交流工频市电 参数: 1. 输入电压:AC 220V 2. 频率测试范围:3-120Hz 3. 精度:百分之2+/-Hz 4. 显示分辨率:1Hz 5. 采样速率:约1次/s 6. 输入回路功耗:小于2VA 7. 环境温度:-25-55摄氏度 8. 外形尺寸:73 x 73 x 52mm 9. 安装孔径:68 x 68mm
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