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秒表檢定裝置GDS-50

1. 范圍

本規程適用于時間檢定儀(以下簡稱檢定儀)的檢定、后續檢定和使用中檢驗。檢定儀包括電子毫秒計檢定儀，秒表檢定儀，電秒表檢定儀。這三種檢定儀可能是相互獨立的，也可能是合為一體的，GDS-50為一體式時間檢定儀。

2． 概述

時間檢定儀GDS-50的基本功能是直接輸出一種或幾種標準的時間間隔信號。該間隔信號除指針式電秒表檢定儀以外，其它均由檢定儀內的晶體振蕩器經過分頻得到各種不同的標準時間間隔信號，通過控制電路對電子毫秒計、數字電秒表和各種秒表進行直接檢定。指針式電秒表檢定儀由市電50Hz頻率分頻得到。

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 ?s-1×10 9 ?s
Accuracy: better than ±(1×10 -7 ×T 0 +3?s)
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.