Runtime DataWatcher Technical Specifications
PC Requirements: WatchLink software requires Window 95, 98, or NT. 7 MB free disk space required.
Operating Temperature Range: 32° - 158° F for Runtime DataWatcher. Flue Sensor can operate in Flues up to 900 deg F.
Heating System Types: The flue sensor can be used with all fuel-fired heating systems except those that condense flue gas to achieve 90%+ efficiency.
Size/Weight: 5.25 x 3.06 x 1.44, including mounting flanges, 7.5 ounces including batteries.
Memory Capacity: 16,290 hourly readings (678 days).
Sampling Interval: On/Off status of the monitored device is checked every 1.2 seconds.
Resolution: The runtime for the hour is stored as an 8-bit number, but two resolution ranges are used. For runtimes less than 50%, the runtime is stored to the nearest 0.286%; for runtimes greater than 50%, the runtime is stored to the nearest 0.625%.
Runtime Accuracy: For the Motor/Appliance sensor, accuracy is primarily determined by the Sampling Interval specification. For the Flue sensor, the error is generally less than 2 seconds per On cycle.
Clock Accuracy: If the unit is operated at temperatures between 59° and 95° F, the DataWatcher clock should be accurate to within 15 minutes per year. If operated at 32° F, error is less than 30 minutes/year. If operated at 158° F, error is less than 1 hour/year.
Battery Type and Life: Three AA Alkaline batteries are used. Expected battery life is 2 years.
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