Model 344/345
Software version 2.3
Installation and Operating Manual
Ultrasonic Non-Contact
Transmitters for Level,
Volume, or Open
Channel Flow
Read this Manual Before Installing
This manual provides information on the Echotel
®
Model 344/345 Ultrasonic Transmitter. It is important
that all instructions are read carefully and followed in
sequence. Detailed instructions are included in the
Unit Configuration
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 © 2010 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 II, Pollution Degree 2.
If equipment is used in a manner not specified by the
manufacturer, protection provided by equipment may be
impaired.
Echotel Model 344/345 Ultrasonic Non-contact Transmitter
Echotel
®
Model 344/345
Ultrasonic Non-contact Transmitters
Table of Contents
1.0 Installation
1.1 Unpacking ................................................................4
1.2 Mounting..................................................................4
1.2.1 Transmitter Location ......................................4
1.2.2 Transducer Location.......................................4
1.3 Transmitter Mounting Procedure ..............................5
1.4 Transducer Mounting Requirements .........................6
1.4.1 Mounting
3
⁄
4
" or 2" NPT Transducer
with Factory-Supplied Bracket,
Without Transducer Housing .........................7
1.4.2 Mounting
3
⁄
4
" or 2" NPT Transducer
with Factory-Supplied Bracket and
Transducer Housing .......................................8
1.4.3 Mounting
3
⁄
4
", 1" or 2" NPT Transducer
with Flange, With or Without
Transducer Housing .......................................9
2.0 Wiring
2.1 Electrostatic Discharge (ESD) Handling Procedure.10
2.2 Transmitter Power Wiring.......................................11
2.3 Transducer Wiring ..................................................11
2.3.1 Without a Transducer Housing.....................12
2.3.2 With a Transducer Housing ..........................13
2.4 Relay Output Wiring ..............................................14
2.5 Output Signal Wiring .............................................14
2.6 RS-232 Output.......................................................15
2.7 Transducer Synchronization ....................................15
3.0 General Information
3.1 Menus .....................................................................16
3.2 Passwords ................................................................16
3.2.1 General Password ..........................................16
3.2.2 Supervisory Password ....................................16
3.3 Operator Keypad.....................................................17
4.0 Unit Configuration
4.1 Complete Menu Structure ......................................18
4.2 Measured Values......................................................19
4.2.1 View Data Log .............................................19
4.3 System Configuration .............................................20
4.3.1 Level Measurement.......................................20
4.3.2 Volume and Level Measurement...................22
4.3.2.1 Custom Table Entry ..............................25
4.3.3 Flow and Level Measurement .......................26
4.3.3.1 Custom Table Entry ..............................28
4.4 I/O Configuration ..................................................29
4.4.1 Relay Settings ...............................................29
4.4.1.1 Relay #1-normal operation....................29
4.4.1.2 Relay #2-normal operation
or lead/lag pump control.......................30
4.4.1.3 Relay #3-normal operation
or fault detection...................................31
4.4.1.4 Relay #4-normal operation
or sampler .............................................32
4.4.2 4–20 mA Settings.........................................33
4.4.3 Totalizer (Flow Mode only) ..........................33
4.5 Advanced Configuration .........................................34
4.6 Diagnostics Menu ...................................................38
4.7 Laptop Menu ..........................................................39
5.0 Reference Information
5.1 Description .............................................................39
5.2 Theory of Operation...............................................39
5.3 Troubleshooting ......................................................40
5.3.1 Troubleshooting System Problems................41
5.3.2 Troubleshooting Flow Chart ........................43
5.4 Agency Approvals....................................................44
5.5 Specifications ..........................................................45
5.5.1 Transmiter ....................................................45
5.5.2 Transducer....................................................45
5.5.3 Physical ........................................................46
5.6 Replacement Parts...................................................48
5.7 Measurement Range Calculations ...........................50
5.8 Model Numbers......................................................52
5.8.1 Transmitter...................................................52
5.8.2 Model 384 38 kHz Transducer.....................52
5.8.3 Model 385 50 kHz Transducer.....................53
5.8.4 Connecting Cable ........................................54
Echotel Model 344/345 Ultrasonic Non-contact Transmitter
1.0
Installation
Caution:
Read entire section prior to starting installation.
1.1
Unpacking
Unpack the instrument carefully. Make sure all components
have been removed from the packing material. Inspect all
components for damage. Check the contents of the packing
slip and report any discrepancies to the factory. Check the
nameplate model number to be sure it agrees with the pack-
ing slip and purchase order. Check and record the serial
number for future reference when ordering parts.
Model Number
Serial Number
1.2
Mounting
1.2.1 Transmitter Location
The transmitter enclosure should be securely fastened to an
appropriate supporting structure, in a location that permits
easy access for maintenance. Avoid locations that are
exposed to direct sunlight, flooding, high levels of radiated
electromagnetic interference, and excessive vibration or
shock.
1.2.2 Transducer Location
Sunshade
Model 384/385 transducers must be mounted directly over
the material to be measured. Both floor and wall mount
transducer brackets are available for use over open tanks or
channels. Flange mounts are available for use with closed
vessels. If mounted in a location where there is intense,
extreme, direct sunlight, a sunshade is recommended.
Proper mounting and wiring of the ultrasonic transducer is
of the utmost importance. Both the accuracy and the relia-
bility of the Model 344/345 can be adversely affected if the
transducer is mounted improperly.
NOTE: The 344/345 requires a blocking distance between the trans-
ducer and the maximum liquid level. The minimum blocking
distance is 12 inches (305 mm) for Model 345 and 18 inches
(460 mm) for Model 344. At temperatures above +140° F
(+60° C) minimum, it is 18 inches for either model. Maximum
blocking distance should be limited to approximately 10 feet
(3 m) as this blocking distance is extended at the expense of
the useful span over which the instrument operates.
Figure 1
Transducer Sunshade
4
Echotel Model 344/345 Ultrasonic Non-contact Transmitter
Transducer
Air
Model 345
25 feet (7.6 m)
maximum
Range
Model 344
35 feet (10.7 m)
maximum
Blocking Distance*
Model 345
24 feet (7.3 m)
maximum
Span
Liquid
Model 344
33.5 feet (10.2 m)
maximum
*Minimum Blocking Distance:
18 inches (460 mm) for the Model 344
12 inches (305 mm) for the Model 345
Figure 2
Transducer Mounting Location–Level/Volume
1.3
Transmitter Mounting Procedure
There are two predrilled openings in the enclosure for
connecting
3
⁄
4
" NEMA 4X conduit. Refer to Figure 3.
1. Open the door of the unit.
2. Drill holes in the enclosure as required for additional
wiring. Be careful not to damage the printed circuit boards.
Be sure that the PC boards are not damaged or contaminated
when removing filings and/or debris from the housing.
3. Provide watertight seals for all wiring entrances in the enclo-
sure to maintain the NEMA 4X rating.
4. Mount the enclosure to a wall or flat surface using the
appropriate screws or bolts. The mounting tabs on the back
of the enclosure can be rotated to the sides, or top and bot-
tom to facilitate mounting. Refer to Figure 4.
5. Install conduit for power and control wiring. Be sure all
connections to the enclosure maintain a NEMA 4X rating.
6. Close the door until it is time to wire the transmitter.
Secure the door by tightening the six screws. Proceed to
Transducer Mounting on the next page.
Figure 3
Predrilled Conduit Openings
NOTE: Do not overtighten the screws that hold the transmitter door
closed. Do not use an electric or pneumatic drive on the screw.
Overtightening can cause cracking of the housing, resulting in
leakage into the housing.
Figure 4
Transmitter Mounting Tabs
Echotel Model 344/345 Ultrasonic Non-contact Transmitter
5
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
