300 Datasheet, PDF (6/8 Pages) DB Lectro Inc – SCREW TYPE SERIES

NON-CONTACT ULTRASOUND
344/345 For Liquid Level,
Volume or Open
Channel Flow
A remote mounted, full-featured ultrasonic transmitter with
extensive agency approvals. Many transducer configurations
and transmitter options are available for greater versatility.
Convenient Front Panel Interface
Front panel keypad makes programming convenient;
once wired, there’s no need to open the enclosure.
A large, 16-character alphanumeric display shows all
parameters and a password code prevents unautho-
rized tampering with configuration data.
Choice of Transducers
The Model 344 employs the powerful 38 kHz Kynar transducer
used primarily for level and volume applications. The Model 345
uses the 50 kHz transducer, available either in Kynar or 316
stainless steel. Transducers feature temperature compensation.
Full-Featured Electronics
Automatic, continuous self-test checks transducer
signal, temperature sensor, all outputs and system
functionality for proper operation. False target
buffering feature eliminates signal interference for
up to nine fixed tank obstructions.
Transducer
Temperature
Outputs
System
Model 344/345 Transmitter Specifications
Power Supply
120 VAC ±10%, 50-60 Hz
240 VAC ±10%, 50-60 Hz
24 VDC ±20%
Power Consumption
12 watts (without heater)
Output Signal
4–20 mA isolated (1,000 Ω load),
RS-232 (data logger downloading)
Relays
Four, 10-amp resistive, SPDT
Fail-safe
User selectable for analog and
relay outputs
Display
16-character alphanumeric
Keypad
16-button integral to front panel
Response Time
2 seconds, typical
Accuracy
±0.25% of configured span
Ambient Temperature
with Heater & Thermostat -40° to +160° F (-40° to +70° C)
w/o Heater & Thermostat -4° to +160° F (-20° to +70° C)
Agency Approvals
Class I, Division 2, Non-incendive
and NEMA 4X from FM and CSA
6
Transducer Specifications
Frequency
38 kHz
50 kHz
Max Range
35 feet (10.7 m) 25 feet (7.6 m)
Max Span
33.5 feet (10.2 m) 24 feet (7.3 m)
Process Temp
-40° to +163° F -40° to +200° F
(-40° to +73° C) (-40° to +93° C)
Process Pressure
Atmospheric to 50 psig (3.45 bar)
Beam Angle
Conical 12°
Cable Length
500 feet maximum
Applications
• Sump & Wastewater
• Slurries, Viscous Fluids
• Pulp & Paper
• Power Generation
• Petrochem