excellent working condition.
all buttons work.
ideal condition.
all buttons work clearly.
resets clearly.
Stopwatches have been discontinued. Manufactured in the 1980s - 1990s. This one was purchased in 1983
Designed to measure time intervals in minutes, seconds and tenths of a second.
Instrument accuracy class Stopwatches SDSpr-1-2 Slava mechanical - 2.
Movement caliber 54mm.
Number of stones 20.
The duration of action of the SDSpr-1-2 Slava mechanism from one complete winding of the spring is at least 8 hours.
The frequency of rewinding during continuous operation is once every 3 hours.
Duration of a full revolution of the hands:
- seconds (main and auxiliary) 30s;
- minute 30 min.
Scale division price of the device Stopwatch SDSpr-1-2 Slava mechanical:
- second 0.1s;
- minute 0.5 min.
Number of scale divisions:
- 300 seconds;
- 60 minutes.
The balance oscillation period is 0.2s.
The movement of the second hands SDSpr-1-2 is discrete with an interval of 0.1 s.
Average error at temperature (20 ± 5) °C for 30 min 0.4 s.
Permissible deviation from the average error at a temperature of 20° C for 30 minutes is 0.3 seconds. The maximum error for 30 s at a temperature of 20 ° C is 0.1 s.
The maximum actuation force of the hand control mechanism applied to the control buttons: the main hands (seconds and minutes) - start and stop 18N; return 15H; auxiliary second hand - stop and combine 15H.
Operating temperature SDSpr-1-2: -40...+ 40° C.
Dimensions:
- case diameter 65mm;
- height of the case with glass 23.4 mm.
Weight 0.23kg
delivery within 11 to 22 working days