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JJG《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.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%
Introduction
The calibrator is a precision instrument calibrating mechanical stopwatch, electronic stopwatch, and 7 type pointer electric stopwatch. The SF2001 stopwatch calibrator is compliant with the stopwatch calibration procedure JJG issued by the National Metrological Bureau. It could be used at metrological department at all levels, factory, institutions and all research institutes to calibrate electric stopwatch (7), mechanical stopwatch and digital quartz electronic stopwatch. The instrument is fully digitally controlled, high reliability,high accuracy, complete functions, convenient operation, and strong anti-interfere
ability.
SF2001 stopwatch calibrator and its accessories:
1)SF2001 stopwatch calibrator 1 piece
2) Three-core power cord 1 piece
3) Dual banana plug test lead 2 pieces
4) BNC-banana test lead 1 piece
5) Soft copy of User’s Guide 1 piece
Main Parameter
1.1 Crystal Oscillator
Nominal frequency: 5MHz
Daily aging rate: ≤5×10 -9 /day
Second stability: ≤5×10 -10 /s
Accuracy: ≤1×10 -7
Warming-up time: over 2 hours
1.2 Calibrate mechanical stopwatch and electronic stopwatch (T0 is inputted calibration period of time)
Input range: T 0 :1s-99999s
Accuracy: better than ±(1×10 -7 ×T 0 +3ms)
1.3 Calibrate electric stopwatch
Pointer:
Input range:
Continuous: T 0 :0.1s-99999s
Trigger state: T 0 :1s-99999s
Pause state: T 0 :0.1s-99999s
Accuracy: better than ±(commercial power frequency accuracy×T 0 +0.6ms)
1.4 Calibrate millisecond counter and digital electric stopwatch
Input range: T 0 :1×10 2 µs-1×10 9 µs
Accuracy: better than ±(1×10 -7 ×T 0 +3µs)
The SF2001 calibrator is fully compliant with the mechanical stopwatch and digital quartz stopwatch calibration procedure, electric stopwatch calibration procedure, and electronic millisecond counter calibration procedure, issued by the National Metrological Bureau.
2.1 Working conditions
Voltage: 220(1±10%)V;
Frequency: 50(1±5%)Hz;
Power consumption: <60VA;
Temperature : 0~40℃;
Humidity: <80%
2.2 Mechanical characteristics
Dimension: 329mm×283mm×155mm Weight: 3.7kg
2.3 Operation characteristics: Input with keys, menu display
2.4 Display mode: LCD display,English menu
2.5 Technique: With SMT technique and large-scale IC, the calibrator is of high reliability, small volume and long service life.
