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  • Environmental Specifications

4000 series digital clocks, calendar clocks & time zone displays - environmental specifications

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  • Operating temperature: 0-50°C
  • Relative Humidity: 0% to 95% (non-condensing.)
  • Altitude: 0 to 3,000m
Timing accuracy
  • Each clock has a High-quality quartz crystal oscillator - unsynchronised accuracy: 0.1 sec/day @ 20-25°C
  • When synchronised via an NTP/SNTP Time Server the clock is typically synchronised within 1-10 milliseconds of master clock timebase depending on network delay and jitter. (N and NE versions only)
  • MSF or DCF synchronisation: ±20mS of UTC when synchronised via a 484.02 (MSF) 484.03 (DCF) radio time code receiver (E and NE clock versions only).
  • GPS/GLONASS synchronisation: when synchronised via a 488.HS3-GPS or 488.HS3-GLONASS receiver the time is within ±5mS of UTC.
Electromagnetic Compatibility, Safety and RoHS2 Directives
4000 series digital clocks and time zone clocks, when used in accordance with our recommendations, comply with the European Community Electromagnetic Compatibility Directive 2004/108/EC, Low Voltage Directive 2006/95/EC and RoHS2 Directive 2011/65/EU and conform to the following standards:
  • EN 50121-4-2006 - Appropriate models have full London Underground and Network Rail Infrastructure approval (PA05/03968)
  • EN 61000-6-2:200
  • EN 61000-6-4:2007+A1:2011
  • EN 55022:2010
  • EN55024:2010
  • EN 60950-1:2006