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.