Brief introduction:
SJ-3A time verification instrument is a multi-functional, comprehensive automatic test device for time verification. It can verify mechanical stopwatch, electronic stopwatch, pointer type electric stopwatch, digital electric stopwatch, digital millisecond meter and other timing instruments. This instrument adopts high stability quartz crystal oscillator as a time reference, using 89 c51 and TTL integrated circuit as the main component, six digital display, membrane switch operation, meet JJG237-95 "time interval measurement instrument pointer type (trial) verification regulation and JJG238-95" digital time interval measurement instrument verification regulations (trial) "requirements, time is a kind of ideal and practical verification instrument. Technical indicators:
1. Measurement range:
1 ms 99999.9 s
Resolution of 0.1 s
2. Measurement error:
Second table: ±(1 × 10-7 × output 2ms)
Electricity stopwatch
Pointer: ≤ ±0.6ms
Digital: ±(1 10-6 × output period)
Millisecond instrument: ±(1 × 10-7 × output period 1 μ s)
3. Crystal vibrator: stability: ±5 × 10-8 / d; accuracy: ±1 × 10-7
4. Working conditions: temperature: 0 ~ 40 ℃; relative humidity: < 80%
Brief introduction:
SJ-3A time verification instrument is a multi-functional, comprehensive automatic test device for time verification. It can verify mechanical stopwatch, electronic stopwatch, pointer type electric stopwatch, digital electric stopwatch, digital millisecond meter and other timing instruments. This instrument adopts high stability quartz crystal oscillator as a time reference, using 89 c51 and TTL integrated circuit as the main component, six digital display, membrane switch operation, meet JJG237-95 "time interval measurement instrument pointer type (trial) verification regulation and JJG238-95" digital time interval measurement instrument verification regulations (trial) "requirements, time is a kind of ideal and practical verification instrument.
