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Signet 3350/3550 Ultrasonic Flowmeter
General
Flow rate range: 0.3 to 10 m/s (1 to 33 ft/s)
Low flow cut off : 0 to 5 m/s configurable
Suitable pipe materials:
• Plastic (PVC, PVDF, CPVC, PP, PE, PEEK, etc.)
• Metals (carbon steel, SS, copper, aluminum, iron)
Pipe Size Range
• Plastic pipes:
• 3550-100: DN25 to DN100 (1 in. to 4 in.)
• 3550-200: DN50 to DN225 (2 in. to 9 in.)
• Metal pipes:
• 3550-100: DN50 to DN100 (2 in. to 4 in.)
• 3550-200: DN50 to DN225 (2 in. to 9 in.)
Application: Clean liquids, no aeration or particles
Accuracy
Pipe size Over 2 m/s
(6 ft/s)
Under 2 m/s
(6 ft/s)
DN25 to DN40
(1 to 1½ in.)
±3% of rate ±0.06 m/s
DN50 to DN225
(2 to 9 in.)
±2% of rate ±0.04 m/s
Display: LCD w/back light 2x16 characters
• Sensor signal quality LED - Normal: green, Error: red
• User selectable language:
English, French, German, Spanish, Japanese
Display resolution:
• Flow rate: 00.0000 min to 9999999 max
• Totalizer: 00000.00 min to 99999999 max
Totalizer Error condition:
Hold last good value or Continue Count
Error Time delay 0 to 100 s
Damping: 0 to 100s Averaging function for 4 to 20 mA
output and Flow Rate display
Response time: 200 ms
Material
Flowmeter: ABS
Sensors: PBT
Sensor frame: 304 SS
Electrical
• 3-3350-1: 100-120 VAC ±10%, 50/60Hz, 15VA max
• 3-3350-2: 200-240 VAC ±10%, 50/60Hz, 15VA max
Signal cable: RF coaxial cable, 5 m std (Avail to 30 m)
Output Specifications
4 to 20 mA output
• Max. load resistance: 600Ω
4 to 20 mA Error condition (Burnout): User selectable
• Hold last good value • Over-scale (22.6 mA)
• Under-scale (3.8 mA) • Zero (4 mA)
Bi-directional or Autoscale dual ranges
• User Selectable
• Hysteresis: 0 to 10% of flow rate range
• Flow range applicable to digital output
Output Specifications (continued)
Relay output (DO2)
• Capacity: 220V AC /30V DC, 1A (resistive load)
• Mechanical SPDT relay contact: (replaceable)
• Mechanical life expectancy: > 2 x 107 operations
• Relay Pulse width: User selectable 50, 100 or 200 ms
Open collector output (DO1)
• Capacity: 30V DC, 0.1A
• Total pulse: Programmable, 1 pps to 1 pulse per day
• Open Collector Pulse width:
User selectable 5, 10, 50, 100 or 200 ms
Digital output Logic
ACTIVE ON: Relay DO2 Normally OFF (de-energized)
Open Collector DO1 normally open
ACTIVE OFF: Relay DO2 Normally ON (de-energized)
Open Collector DO1 normally closed
Programmable functions
• Cutoff limit (common to DO1 and DO2)
• NOT USED
• TOTAL SWITCH Operation
• +TOTAL PULSE: Proportional to +Flow rate
• –TOTAL PULSE: Proportional to -Flow rate
• FLOW SPAN-2:
Select a contact output at SPAN-2 measurement status
(forward automatic 2 ranges, forward/reverse automatic
2 ranges).
• ALARM Operation
- HARDWARE: Contact output at EEPROM error.
- PROCESS: Contact output when signal is bad
FLOW SWITCH Operation
• UPPER SWITCH: HIGH Flow Alarm
• LOWER SWITCH: LOW Flow Alarm
• TOTAL SWITCH: Volumetric Pulse
Flow requirements
• Well-developed turbulent or laminar flow
• Maximum air in liquid volume:
0.2% @ 1 m/s (inversely proportional to velocity)
Weight
• Flowmeter: 0.8 kg
• Sensor: 3-3550-100: 0.3 kg
3-3550-200: 0.4 kg
Environmental
NEMA4/IP65 enclosure for both flowmeter and flow sensor
Process temperature:
• With silicone rubber acoustic couplant
-40°C to +180°C (-40°F to 356°F)
• With silicone-free grease acoustic couplant
0°C to 60°C (32°F to 140°F)
Ambient temperature:
• 3-3350-X: -20° to 50°C (-4° to 122°F)
• 3-3550-XXX: -20° to 60°C (-4° to 140°F)
Short-term thermal stability: 140ºC, 30 min
Relative Humidity: 90% (non-condensing)
Specifications
