7

NON-CONTACT ULTRASOUND

Volume or Open

Channel Flow

Model 355 Transmitter Specifications

Power Supply

16 to 36 VDC

Power Consumption

Less than 1 Watt

Output Signal

Fault Detection

Selectable from 3.6, 22 mA, or hold

Damping

Adjustable from 1–60

Ambient Temperature

-40° to +175° F (-40° to 80° C)

Display

2-line

× 16-character LCD

Keypad

4-push-button menu-driven

Compensation

Auto temperature compensation

over transducer operating range

Accuracy

Greater of ±0.2% of range or

0.24 inch (6 mm)

Repeatability

±0.125 inch (3 mm)

Resolution

0.1 inch (2.5 mm)

Linearity

±0.4 inch (10 mm)

Response Time

Less than 1 second (typical)

Warm-up Time

30 seconds

Enclosure

Protection

NEMA 6 (IP 67)

Transducer Specifications

Frequency

60 kHz

Beam Angle

Conical 10°

Max Range

20 feet (6 meters)

Blocking Distance

10 inches (250 mm)

Process Temp

-40° to +175° F (-40° to +80° C)

Process Pressure

0 to 43.5 psig (0 to 3 bar)

Material

Protection

NEMA 6P (IP 68)

• Sump, Well, Tank Level

• Highly Viscous Media

• Paint, Ink & Solvents

• Food & Beverage Vessels

• Batch & Day Tanks

Applications

Outstanding measurement performance and value

in a two-wire, integral transmitter featuring flexible

software and advanced signal processing.

Temperature Compensated Echo Rejection

The Model 355 has a patent-pending echo rejection technique that

constantly adjusts the rejected echo profile based on the current

sound propagation velocity. This technique keeps the transmitter track-

ing the actual liquid level as opposed to false targets even when tem-

perature changes alter the shape of the echo rejection profile.

Dual Flow Totalizers

Two 7-digit flow totalizers are provided for

recording flow. One totalizer is resettable and

the other is non-resettable. Several multipliers

are selectable to allow for proper scaling.

Totalizer time is also recorded to show how

long each totalizer has been recording flow.

Stored Tank Shapes for Volume

Volume configuration with the 355 is as easy as selecting the tank

shape and inputting 1–3 dimensions. While a 20-point custom table is

also available, selecting the actual tank shape provides for a fast and

accurate configuration for a variety of common tank shapes.