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Sigma 980 - 1.3 Keypad Description

Sigma 980
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Page 16
Specifications
Specifications
Submerged Area Velocity Probe
Method Doppler Principle / Pressure Transducer
Material Polyurethane body, 316 series stainless steel diaphragm
Cable Urethane sensor cable with air vent, shielded
Cable Length 7.6 m (25 ft) standard, custom cable up to 100 ft
Probe Dimensions
Length: 12.7 cm (5 inches)
Width: 3.81 cm (1.5 inches)
Height: 2.03 cm (0.8 inches)
Mounting
Dedicated Mounting Rings (mounting clips recommended for pipe diameters 8 in. or
under), Mounting Plate (for permanent mounting—drills to pipe wall) Adjustable
Mounting Band Kit.
Connection
Sensor connector to quick-connect hub, bare lead connection via terminal block or
bare lead connection to junction box with bare lead junction box via terminal block.
Velocity
Velocity Accuracy: ± 2% of reading; Zero stability: <0.05 fps (<0.015 m/s)
Response Time: 4.8 sec.
Profile Time: 4.8 sec.
Range: -1.52 to 6.1 m/s (-5 to +20 fps)
Resolution: 0.0028 m/s (0.01 fps)
Operating Temperature: -18° to 60 °C (0° to 140 °F)
Depth
Depth Accuracy: ±2% of reading
Maximum Allowable Level: 3X over pressure
Operating Temperature Range: 0° to 71 °C (32° to 160 °F)
Compensated Temperature Range: 0 to 30 °C (32 to 86 °F)
Temperature Error:
0.005 to 3.5 m ±0.0022 m/°C (0.018 to 11.5 ft ±0.004 ft/°F)
0.005 to 10.5 m ±0.006 m/°C (0.018 to 34.6 ft ±0.012 ft/°F)
(maximum error within compensated temperature range - per degree of change)
Draw down correction**:
0 to 3.05 mps (0 to 10 fps) = 0.085% of reading
Air Intake: Atmospheric pressure reference is desiccant protected
* See Troubleshooting Measurement Errors on page 115.
** U.S. Patent 5,691,914

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