GDS-50秒表檢定儀是一最新用的時間檢定儀，供各級計量部門，工廠，院校及科研單位檢定各種秒表、毫秒儀，機械秒表等，性能符合檢定規程的要求。
技術指標：
1、 檢定電子秒表和機械秒表：
在1－99999秒內可任意置數
準確度±（2＊10－7＊輸出時段）秒±0.003秒
2、 檢定電子毫秒儀（正負兩組輸出）
在1－99999秒內可任意置數，最小輸出100微秒
準確度±（2＊10－7＊輸出時段）秒±0.003秒
3、 檢定電秒表（適合新規程JJG237-95）
在1－99999秒內可  任意置數
指針式準確度：電同步＜±0.6毫秒
數字式準確度：±（2＊10－7＊輸出時段）秒±0.006秒

Introduction

The calibrator is a precision instrument calibrating mechanical stopwatch, electronic stopwatch, and 405/407/408/415/417 type pointer electric stopwatch. The SF2001 stopwatch calibrator is compliant with the stopwatch calibration procedure JJG 237-2010 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 (405,407,408,415/417), 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.
GDS-50 stopwatch calibrator and its accessories:
1)GDS-50 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: 10MHz
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.