300 Datasheet, PDF (4/8 Pages) DB Lectro Inc – SCREW TYPE SERIES

NON-CONTACT ULTRASOUND
Model 300/301
A 16-button keypad and
two-line, 16-character
LCD display is inside
the explosion-proof
housing
300/301 For Liquid Level,
Volume or Open
Channel Flow
Available as an integral or remote mounted unit,
this versatile and powerful ultrasonic transmitter
is easy to install and quick to calibrate.
Advanced Electronics
Isolated 4–20 mA output with an active/passive mode for
loop power or device power. RS-485 with Modbus protocol
allows bi-directional communication with DCS or PLC. Two
or four 10 amp SPDT gold flash relays for a wide variety of
alarm and control schemes.
Explosion-Proof Transmitter and Transducer
The Model 300/301 has Explosion-Proof FM and CSA
agency approvals for both the transducer and the trans-
mitter: Class I, Division 1, Groups B, C, and D.
Fast, Password-Protected Calibration
Unique QuickCal^™ calibration feature allows complete system
calibration in 90 seconds. A password protection feature also
prevents unwanted tampering with the configuration data.
Model 300/301 Transmitter Specifications
Power Supply
120 VAC ±10%, 50-60 Hz
240 VAC ±10%, 50-60 Hz
24 VDC ±20%
Power Consumption
12 watts maximum
Analog Output Signal
Active Mode 4–20 mA (isolated); maximum of
1,000 Ω loop resistance
Passive Mode 4–20 mA (isolated); loop resist-
ance dependent on power supply
(32 volt max) 1,000 Ω @ 24 volts
Digital Output
RS-485 with Modbus
Relays
10 amp SPDT resistive (0, 2 or 4)
Fail-safe
User selectable for analog and
relay outputs
Ambient Temperature
Electronics -40° to +160° F (-40° to +71° C)
Display
Two-line, 32 character LCD
Keypad
16-button (inside housing)
Response Time
2 seconds, typical
Accuracy
4
±0.25% of calibrated span
Transducer Specifications
Frequency
38 kHz
Beam Angle
Conical 12°
Max Range/Span 30 feet (9.1 m) / 28.5 feet (8.7 m)
Dead Zone
18 inches (460 mm) minimum
Process Temp
-40° to +163° F (-40° to +73° C)
Process Pressure Atmospheric to 50 psig (3.45 bar)
Cable Length
500 feet maximum
Applications
• Viscous Fluids
• Acids, Caustics
• Water & Wastewater
• Chemicals
• Pulp & Paper
• Power Generation