一、概述
GDS-5B 型秒表检定仪是一种多功能，综合性的时间检定自动测试装置，它能对机械秒表、电子秒表进行进行检定。本仪器采用高稳定度石英晶体振荡器作为时间基准，用AVR 单片机和TTL 集成电路为主要元件，大屏LCD显示，旋转编码开关操作，满足JJG237-2010《秒表检定规程》的要求，是一种较理想和实用的秒表检定仪。
二、技术指标
1. 测量范围
1ms------99999.9s
2. 测量误差
秒表：± 3ms
3. 晶体振荡器
准确度：±5×10-7/日
三、工作条件
环境温度：0~40℃ 相对湿度：<80%
FEATURES
Comply with national regulation of calibrating.
Auto time measuring device of multi-function and high synthesis
with time base of crystal oscillator of high stability
With advanced FPGA technique and MCU integration control, quick response.
LED display with clarity interface, easy operation
suitable for metrological service, factory, academy and scientific research institution to calibrate all kinds of timer instruments
Dimension: 255mm×100mm×380mm
Weight: 4.9kg
SPECIFICATIONS
For mechanical stopwatch and electronic stopwatch calibrating
Input Range T0 1s-99999s Accuracy ＜±（1×10-7×T0＋3ms）
For pointer stopwatch calibrating
Input Range T0 Continuous: 0.1s-99999s
Trigger: 1s-99999s
Pause: 0.1s-99999s
Accuracy ＜±（Mains frequency accuracy×T0＋0.6ms）
For millisecond stopwatch and digital stopwatch calibrating
Input Range T0 1×102μs ~1×109μs Accuracy ＜±（1×10-7×T0＋3μs）
Crystal Oscillator
Nominal Frequency 5MHz Daily Aging Rate ≤5×10-9/day
Second Stability ≤1×10-10/s Accuracy ≤1×10-7
Warm Up Time 12 hours
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