Specifications 8-1
September 2004
General Specifications The general specifications for the Model AT868 flow transmitter are
divided into the following categories:
Hardware Configuration Channel Options
Standard: 1-Channel.
Optional: 2-Channel/Path (2 paths per pipe).
Package Options:
General purpose NEMA 4X powder-coated aluminum wall mount.
Dimensions:
2.2 lb (1 kg); 6 x 4 x 3 in. (152.4 x 101.6 x 76.2 mm).
Environmental Ambient Operating Temperature:
14° to 131°F (–10° to 55°C).
Storage Temperature:
–40° to 158°F (–40° to 70°C).
Flow Accuracy
(% of Reading)
Accuracy specifications assume a fully developed flow profile and a
straight run of 10 pipe diameters upstream and 5 pipe diameters
downstream.
Pipe Diameter (ID) >6 in. (150 mm):
Velocity > 1 ft/s (> 0.3 m/s); ± 2% typical (± 0.5 to 1% with
calibration).
Velocity ≤ 1 ft/s (≤ 0.3 m/s); ± 0.03 ft/s (± 0.01 m/s) typical.
Pipe Diameter (ID) ≤ 6 in. (150 mm):
Velocity > 1 ft/s (> 0.3 m/s); ± 2 to 5% typical.
Velocity < 1 ft/s (< 0.3 m/s); ± 0.03 ft/s (± 0.01 m/s) typical.
Range –40 to 40 ft/s (–12.2 to 12.2 m/s).
Rangeability 400:1.
Repeatability Wetted Transducers: ± 0.2% of full scale
Clamp-on Transducers: ± 0.2 to 0.5% of full scale.
Note: Specifications assume a fully developed flow profile, with a
straight run of pipe 10 diameters upstream and 5 diameters
downstream.
Fluid Types Water and wastewater.
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