I. Overview

The GDS-50 Stopwatch Calibrator is a multifunctional, comprehensive automatic time calibration testing device capable of calibrating both mechanical and electronic stopwatches. This instrument employs a highly stable quartz crystal oscillator as the time base, utilizes AVR microcontrollers and TTL integrated circuits as primary components, features a large LCD display, and operates via a rotary encoder switch. It meets the requirements of JJG237-2010 "Stopwatch Verification Regulation," making it an ideal and practical stopwatch calibrator.

II. Technical Specifications

1. Measurement Range

1ms------99999.9s

2. Measurement Error

Stopwatch: ±3ms

3. Crystal Oscillator

Accuracy: ±5×10??/day

III. Operating Conditions

Ambient Temperature: 0~40°C Relative Humidity: <80%