Echotel
®
Model 355
Installation and Operating Manual
Two-Wire Non-Contact
Ultrasonic Transmitter
For Level, Volume,
and Open Channel Flow
Measurement
Cast aluminum housing with
Kynar
®
transducer
Lexan
®
housing with
polypropylene transducer
Read this Manual Before Installing
This manual provides information on the Echotel
Model 355 Ultrasonic Transmitter. It is important that
all instructions are read carefully and followed in
sequence. Detailed instructions are included in the
Installation
section of this manual.
Conventions Used in this Manual
Certain conventions are used in this manual to convey
specific types of information. General technical material,
support data, and safety information are presented in nar-
rative form. The following styles are used for notes, cau-
tions, and warnings.
NOTES
WARNING
Explosion hazard. Do not connect or
disconnect designs rated Explosion-proof or Non-incen-
dive unless power has been switched off and/or the area is
known to be non-hazardous
Notice of Copyright and Limitations
Magnetrol & Magnetrol logotype, and Echotel are regis-
tered trademarks of Magnetrol International.
Copyright © 2009 Magnetrol International, Incorporated
All rights reserved.
Performance specifications are effective with date of issue
and are subject to change without notice. Magnetrol
reserves the right to make changes to the product
described in this manual at any time without notice.
Magnetrol makes no warranty with respect to the accuracy
of the information in this manual.
Warranty
All Magnetrol electronic level and flow controls are war-
ranted free of defects in materials or workmanship for one
full year from the date of original factory shipment.
If returned within the warranty period; and, upon factory
inspection of the control, the cause of the claim is deter-
mined to be covered under the warranty; then, Magnetrol
will repair or replace the control at no cost to the pur-
chaser (or owner) other than transportation.
Magnetrol shall not be liable for misapplication, labor
claims, direct or consequential damage or expense arising
from the installation or use of equipment. There are no
other warranties expressed or implied, except special writ-
ten warranties covering some Magnetrol products.
Quality Assurance
The quality assurance system in place at Magnetrol
guarantees the highest level of quality throughout the
company. Magnetrol is committed to providing full
customer satisfaction both in quality products and
quality service.
Magnetrol’s quality assurance system is
registered to ISO 9001 affirming its
commitment to known international
quality standards providing the strongest
assurance of product/service quality
available.
Notes contain information that augments or clarifies an
operating step. Notes do not normally contain actions.
They follow the procedural steps to which they refer.
Cautions
Cautions alert the technician to special conditions that
could injure personnel, damage equipment, or reduce
a component’s mechanical integrity. Cautions are also
used to alert the technician to unsafe practices or the
need for special protective equipment or specific mate-
rials. In this manual, a caution box indicates a poten-
tially hazardous situation which, if not avoided, may
result in minor or moderate injury.
WARNINGS
Warnings identify potentially dangerous situations or
serious hazards. In this manual, a warning indicates an
imminently hazardous situation which, if not avoided,
could result in serious injury or death.
Safety Messages
Follow all standard industry procedures for servicing elec-
trical and computer equipment when working with or
around high voltage. Always shut off the power supply
before touching any components. Although high voltage
is not present in this system, it may be present in other
systems.
Electrical components are sensitive to electrostatic dis-
charge. To prevent equipment damage, observe safety
procedures when working with electrostatic sensitive
components.
Low Voltage Directive
For use in Installations Category I, Pollution Degree 2.
If equipment is used in a manner not specified by the
manufacturer, protection provided by equipment may be
impaired.
51-661 Echotel Model 355 Two-Wire Ultrasonic Transmitter
Echotel Model 355
Non-Contact Ultrasonic Transmitter
Table of Contents
1.0 Introduction
1.1 Principle of Operation .............................................4
2.0 Installation
2.1 Unpacking ...............................................................5
2.2 Electrostatic Discharge (ESD) Handling Procedure .....5
2.3 Mounting and Application Considerations ..............6
2.3.1 Position .........................................................6
2.3.2 Orientation ...................................................6
2.3.3 Temperature ..................................................6
2.3.4 Obstructions .................................................7
2.3.5 Pipe Nozzles..................................................7
2.3.6 Foam.............................................................7
2.3.7 Vapors ...........................................................7
2.3.8 Wind.............................................................7
2.3.9 Open Channel Flow Measurement ...............7
2.4 Wiring .....................................................................8
2.4.1 General Purpose or Non-Incendive ...............8
2.4.2 Intrinsically Safe............................................9
2.4.3 Explosion Proof.............................................9
2.5 Configuring the Transmitter ..................................10
2.5.1 Basic Operating Parameters.........................10
2.5.2 Setting Up for Bench Configuration ...........10
2.5.3 Transmitter Initialization.............................10
2.5.4 Transmitter Display and Keypad .................11
2.5.4.1 Menu Traversal Mode .....................11
2.5.4.2 Character Data Entry Mode............11
2.5.4.3 Numeric Digit Entry Mode ............12
2.5.4.4 Increment/Decrement Entry Mode ..12
2.5.5 Password Protection (Default = 0)...............13
2.5.6 Configuration Menu Overview ...................13
2.5.7 Measured Values Menu ...............................13
2.5.8 System Configuration Menu .......................16
2.5.8.1 Level Applications ...........................17
2.5.8.2 Volume Applications .......................18
2.5.8.3 Open Channel Flow Applications ...23
2.5.9 I/O Configuration Menu ............................30
2.5.10 Advanced Configuration Menu...................34
2.5.11 Diagnostics Menu .......................................41
2.5.12 Factory Configuration Menu ......................45
2.6 Configuration Using HART
®
.................................46
2.6.1 Connections................................................46
2.6.2 Display Menu .............................................46
2.6.3 HART
®
Menu .............................................47
3.0 Reference Information
3.1 Troubleshooting .....................................................49
3.1.1 Troubleshooting System Problems...............50
3.1.2 Error Messages ............................................50
3.2 Measurement Range Calculations ..........................52
3.3 Speed of Sound Through Gases .............................53
3.4 Parts.......................................................................53
3.4.1 Replacement Parts.......................................53
3.4.2 Replacement Spare Parts .............................54
3.5 Agency Approvals...................................................54
3.5.1
Agency (FM/FMc) Drawing and
Entity Parameters
.....................................55
3.6 Specifications .........................................................56
3.6.1 Transmitter..................................................56
3.6.2 Transducer ..................................................56
3.6.3 Performance ................................................56
3.6.4 Physical .......................................................57
3.7 Model Number ......................................................58
Model 355 Configuration Data Sheet
..................................59
51-661 Echotel Model 355 Two-Wire Ultrasonic Transmitter
1.0
Introduction
Echotel Model 355 is a two-wire non-contact transmitter
that performs level, volume, and open channel flow meas-
urements in a wide variety of industrial and municipal
applications. A maximum range of 20 feet (6 meters) can
be measured under ideal conditions. The maximum range
will be less than this if there is excessive turbulence, foam
or other adverse application conditions. The user should
consult section 3.2, Measurement Range Calculations, to
make sure that the Model 355 is suited for the specific
application.
1.1
Blocking
Distance
Principle of Operation
Non-contact ultrasonic measurement is obtained by emit-
ting an ultrasonic pulse from the transducer and measur-
ing the time required for the echo to reflect from the liq-
uid surface and return to the transducer. The Model 355
measures the time of the round trip pulse and calculates
the distance using the equation:
D = Va T
2
D
= Distance to target
Va
= Velocity of sound through air (1,128 ft/sec.)
T
= Time for one round trip sound pulse
Since the speed of sound is temperature dependent, the
transducer also measures the temperature at the transducer
to provide compensation for changing air temperatures.
Level is computed by the 355 electronics using the meas-
ured distance and the configuration data that has been
entered for the vessel dimensions.
Distance (measured)
Range
Level
(range - distance)
Level/Volume Application
Model 355
Flow
Parshall
Flume
By knowing the vessel type and it’s dimensions, the electron-
ics can calculate the liquid volume in the vessel. In a similar
operation, the Model 355 can perform open channel flow
measurement by converting the level reading into units of
volume per unit of time. Common tank shapes, flumes and
weirs are stored in the 355 software. A 20-point lineariza-
tion table is also available for unusual tanks or primary flow
elements.
Open Channel Flow Application
4
51-661 Echotel Model 355 Two-Wire Ultrasonic Transmitter
2.0
Installation
This section provides detailed procedures for properly
installing, configuring, and, as needed, troubleshooting the
Model 355 Ultrasonic Transmitter.
2.1
Unpacking
Unpack the instrument carefully. Make sure all components
have been removed from the packing material. Check all the
contents against the packing slip and report any discrepancies
to the factory.
Before proceeding with the installation, do the following:
• Inspect all components for damage. Report any damage to
the carrier within 24 hours.
• Make sure the model number on the nameplate agrees with
the packing slip and purchase order.
• Record the model and serial numbers for future reference
when ordering parts.
Model Number
Serial Number
2.2
Electrostatic Discharge (ESD)
Handling Procedure
Magnetrol’s electronic instruments are manufactured to the
highest quality standards. These instruments use electronic
components that may be damaged by static electricity pres-
ent in most work environments.
The following steps are recommended to reduce the risk of
component failure due to electrostatic discharge.
Ship and store circuit boards in anti-static bags. If an anti-
static bag is not available, wrap the board in aluminum foil.
Do not place boards on foam packing materials.
Use a grounding wrist strap when installing and removing
circuit boards. A grounded workstation is recommended.
Handle circuit boards only by the edges. Do not touch
components or connector pins.
Make sure that all electrical connections are completely
made and none are partial or floating. Ground all equip-
ment to a good earth ground.
•
•
•
•
51-661 Echotel Model 355 Two-Wire Ultrasonic Transmitter
5
京公网安备 11010802033920号
EEWORLD
