"ASY411 digital millisecond meter" is a digital multifunctional timing instrument. This machine adopts the large scale integrated circuit, the use of high precision quartz crystal as standard reference, six counts / decoder / driver, LED red light digital tube display. The use of ABS engineering plastics in portable shell structure, key switch control, aluminum alloy outer packing box, easy to carry. The machine has the advantages of convenient operation, visual reading, good stability, strong anti-interference, high precision, small volume, light weight, low price. Time parameter test can be widely applied to various relays, machine tool electrical appliance, switch, delay and in electronic circuit.
1 meter test function.
The 1.1 positive pulse width
1.2 negative pulse width
1.3 air contact closure time
1.4 points off time
1.5 dual interval start -- is jump, jump, negative air contact (Ren Xuan) stop -- is jump, jump, negative air contact (Ren Xuan)
1.6 manual timing
2 main technical index
2.1 range
2.1.1 measuring range: 0.1 - 99999.9ms
2.1.2 adaptive signal amplitude: + 5 - + 250V (P-P)
2.2 basic error
2.2.1 time scale stability: less than 2 * 10-5
2.2.2 measurement error is less than 2 * 10-5 + 1 mantissa
2.3 display mode: six integrated LED red digital tube
2.4 adaptive signal: positive and negative pulses, the positive and negative potential jump, idle contact closure and disconnection
Input impedance: 2.5 more than 200K Omega
2.6 working conditions:
2.6.1 temperature (0C): 0 ~ 40
Relative humidity: less than 85% 2.6.2
2.7 power: 220 + 10%V
2.8 power consumption: less than 2W
2.9 continuous working time: 8h
2.10 the appearance
2.10.1 volume: 195 (long) x 175 (wide) x 70 (high)
2.10.2 weight: About 2kg
2.11 reset mode: Manual

“ASY411型数字毫秒计”是一种数字式多功能计时仪器。该机采用大中规模集成电路，使用高精度石英晶体作为时标基准，六位计数/译码/驱动，LED红色发光数码管显示。在结构上采用ABS工程塑料便携式外壳，琴键开关控制，铝合金外包装箱，便于携带。该机操作方便、读数直观、稳定性好、抗干扰性强、测试精度高、体积小、重量轻、价格低廉。可广泛适用于各种继电器、机床电器、开关、延时器及电子线路中的时间参数测试。
1.仪表测试功能.
1.1正极性脉冲宽度
1.2负极性脉冲宽度
1.3空接点闭合时间
1.4空接点断开时间
1.5双路间隔时间 启动 ——正跃变、负跃变、空接点（任选） 停止 ——正跃变、负跃变、空接点（任选）
1.6手动计时

2.主要技术指标

2.1 量程
2.1.1 测量范围：0.1—99999.9ms
2.1.2 适应信号幅度：±5——±250V（P-P）
2.2 基本误差
2.2.1 时标稳定度：≤2×10-5
2.2.2 测量误差：≤2×10-5±1个尾数
2.3 显示方式：六位一体化LED红色数码管
2.4 适应信号：正、负脉冲、正、负电位跃变，空接点闭合、断开
2.5 输入阻抗：≥200KΩ
2.6 工作条件：
2.6.1 温度（0C）：0 ~ 40
2.6.2相对湿度：≤85%
2.7 工作电源：220±10%V
2.8 功耗：≤2W
2.9 连续工作时间：8h
2.10 外观
2.10.1 体积：195（长）×175（宽）×70（高）
2.10.2 重量：约2kg
2.11 复位方式：手动