Magnetrol Echotel 355 Operating instructions

Brand: Magnetrol

Model: Echotel 355

Category: Measuring, testing & control

Type: Operating instructions

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

51-661 Echotel Model 355 Two-Wire Ultrasonic Transmitter

Read this Manual Before Installing

his 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 sec-

tion of this manual.

Conventions Used in this Manual

Certain conventions are used in this manual to convey spe-

cific types of information. General technical material, sup-

port data, and safety information are presented in narrative

form. The following styles are used for notes, cautions, and

warnings.

NOTES

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 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 be-

fore touching any components. Although high voltage is

not present in this system, it may be present in other sys-

tems.

Electrical components are sensitive to electrostatic dis-

charge. To prevent equipment damage, observe safety pro-

cedures 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 man-

ufacturer, protection provided by equipment may be im-

paired.

WARNING Explosion hazard. Do not connect or dis-

connect designs rated Explosion-proof or Non-incendive

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.

International, Incorporated

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 in-

formation in this manual.

Warranty

All MAGNETROL electronic level and flow controls are

warranted free of defects in materials or workmanship

for eighteen months 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, MAG-

NETROL will repair or replace the control at no cost to

the purchaser (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 written 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.

The MAGNETROL 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.

51-661 Echotel Model 355 Two-Wire 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

Echotel

Model 355

Non-Contact Ultrasonic Transmitter

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 ap-

plications. 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 con-

sult section 3.2, Measurement Range Calculations, to make

sure that the Model 355 is suited for the specific applica-

tion.

1.1 Principle of Operation

Non-contact ultrasonic measurement is obtained by emit-

ting an ultrasonic pulse from the transducer and measuring

the time required for the echo to reflect from the liquid

surface and return to the transducer. The Model 355 meas-

ures the time of the round trip pulse and calculates the dis-

tance using the equation:

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 en-

tered for the vessel dimensions.

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 linearization

table is also available for unusual tanks or primary flow ele-

ments.

D =

Va T

Range

Blocking

Distance

Distance (measure

Level

(range - distance)

Model 355

Flow

Parshall

Flume





51-661 Echotel Model 355 Two-Wire Ultrasonic Transmitter

2.0 Installation

This section provides detailed procedures for properly in-

stalling, 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 com-

ponents or connector pins.

• Make sure that all electrical connections are completely

made and none are partial or floating. Ground all equipment

to a good earth ground.

51-661 Echotel Model 355 Two-Wire Ultrasonic Transmitter

2.3 Mounting and Application Considerations

 Unit should only be hand-tightened into the process con-

nection. Overtightening may cause transducer errors and

will void the warranty.



 The Model 355 uses a thermoplastic transducer that should

not be used in liquid media that have esters or ketones.

Special Conditions for Safe Use:

Materials marked as Category I equipment and used in haz-

ardous areas requiring this category shall be installed in such a

way that, even in the event of rare incidents, the aluminum en-

closure cannot be an ignition source due to impact or friction

2. The transmitter shall be installed so that electrostatic

discharges on plastic parts are prevented.

NOTE: Remove the black protective plastic cap from the end of the

transducer.

There are several application considerations that should be

evaluated prior to installing a non-contact ultrasonic trans-

mitter. The next few pages should be read thoroughly to

ensure that the Model 355 will perform as expected in

the given application. Section 3.2, Measurement Range

Calculations, provides derating multipliers that should be

used to determine the maximum potential range in diffi-

cult applications.

 

The optimum mounting position of the Model 355 is be-

tween

⁄2 and

⁄3 of the radius of the (cylindrical) tank. This

will position the unit to minimize any interference that the

10° beam (5° half angle) has with the tank walls or any agi-

tator blades that exist in the tank. Refer to the Beam Ra-

dius vs. Distance figure at left.

 

The face of the transducer must be parallel to the liquid

surface within 2° to 3° for proper operation.

 

Ensure that the Model 355 will be protected against overheat-

ing by intense direct sunshine. When the unit will be subjected

to severe direct sun, the use of a sunshade is recommended.

Sunshade

Radius

r=5.2 inches5 feet

r=10.5 inches10 feet

r=15.7 inches15 feet

r=21.0 inches20 feet

Beam Radius (r) vs. Distance







51-661 Echotel Model 355 Two-Wire Ultrasonic Transmitter

 

Preferred mounting is such that no obstacles (e.g., fill

pipes, ladders, bracing members, agitator blades, etc.) ob-

struct the ultrasonic beam. Minor obstacles in the path of

the ultrasonic beam can be programmed out through the

use of the Echo Profile menu in Advanced Configuration.

For further information on vessel obstructions, see Section

3.2, Measurement Range Calculations.

 

Ideally, the 355 should be mounted so that the transducer

face is at least 10

" (250 mm) above the highest anticipated

level. In applications where the material level may come

into the blocking distance, the transducer can be mounted

in a pipe nozzle (standpipe). The inner rim of the nozzle

must be smooth and free of burrs. False echoes can some-

times be produced by the change in impedance at the end

of a nozzle. Cutting the bottom of the nozzle at a 45°

angle is suggested to help eliminate false echoes by reduc-

ing this impedance change. The maximum length for a

given diameter of nozzle is shown at left.

 

Foaming of the liquid surface may render ultrasonic level

measurement impossible. If possible, a mounting location

should be found where foaming is at a minimum. Another

alternative is to install the transducer in a stilling well that

extends below the lowest level to be measured in the tank.

Refer to Section 3.2, Measurement Range Calculations, for

more information.

 

Closed tanks that contain chemicals or other liquids that

create vapors may severely reduce the maximum measuring

range. Refer to the Section 3.2, Measurement Range Cal-

culations for more information.

 

Strong air flow or wind in the vicinity of the ultrasonic

beam should be avoided. A strong wind may prevent the

return echo from being received by the transducer.

 

For the best accuracy, mount the transducer as close as possi-

ble above the expected maximum water level (Head) in the

flume or weir (usually 12 to 18 inches (300 to 450 mm)

higher than the maximum head in the flume or weir).

Install the Model 355 on the inflow side of the flume throat

or weir crest in the location defined by the manufacturer of

the primary measuring device. The unit should also be

aligned with the longitudinal axis of the flume or weir.

Diameter

Length

 

2" (50 mm)

Not Recommended

3" (75 mm) 9" (225 mm)

4" (100 mm) 12" (300 mm)

5" (125 mm) 15" (375 mm)

6" (150 mm) 18" (450 mm)

8" (200 mm) 20" (500 mm)

Model 355

Flow

Parshall

Flume







45°

51-661 Echotel Model 355 Two-Wire Ultrasonic Transmitter

2.4 Wiring

 The Echotel Model 355 transmitter operates at voltages of

6 to 36 VDC (GP), 16 to 28.6 VDC (IS) and 16 to 36 VDC

(XP). Higher voltage will damage the transmitter.

 The Lexan

housing should only be used as “end of line”,

with one conduit entry plugged. If cable glands are used

with the Lexan housing, they should be non-metallic.

Wiring between the power supply and the Echotel Model 355

transmitter should be made using 18–22 AWG shielded

twisted pair instrument cable. Wiring must be suitable for

temperatures up to at least +185° F (+85° C). Within the

transmitter enclosure, connections are made to the terminal

strip and the ground connections. The directions for wiring

the Echotel Model 355 transmitter depend on the applica-

tion:

• General Purpose or Non-incendive (Cl I, Div. 2)

• Intrinsically Safe

• Explosion Proof

 

This equipment is suitable for installation in Class I, Divi-

sion 2, Groups A, B, C, and D hazardous or

non-hazardous locations.

WARNING 



A general purpose installation does not have flammable

media present. Areas rated non-incendive (Cl I, Div. 2)

have flammable media present only under abnormal

conditions. No special electrical connections are required.

 If flammable media is contained in the vessel, the

transmitter must be installed per Cl I, Div. 1 standards of

area classification.

To install General Purpose or Non-Incendive wiring:

1. Remove the cover of the transmitter. Install the conduit

plug in the unused opening. Use PTFE tape/sealant to en-

sure a liquid-tight connection.

2. Install a conduit fitting and pull the supply wires.

3. Connect shield to an earth ground at power supply.

4. Connect an earth ground wire to the green ground screw.

Use a minimum 18 AWG wire rated up to +185 °F (+85 °C).

5. Connect the positive supply wire to the (+) terminal and

the negative supply wire to the (-) terminal.

6. Replace the cover of the transmitter.



Ground

(+)

(

Black Wire (-)

Red Wire (+)

51-661 Echotel Model 355 Two-Wire Ultrasonic Transmitter

 

An intrinsically safe (IS) installation potentially has flam-

mable media present. An approved IS barrier must be in-

stalled in the non-hazardous (safe) area. See Agency

Drawing, Section 3.5.1.

To install Intrinsically Safe wiring:

1. Make sure the IS barrier is properly installed in the safe

area (refer to local plant or facility procedures). Complete

the wiring from the barrier to the Echotel 355 transmitter.

2. Remove the cover of the transmitter. Install the conduit

plug in the unused opening. Use PTFE tape/sealant to en-

sure a liquid-tight connection.

3. Install a conduit fitting and pull the supply wires.

4. Connect shield to an earth ground at power supply.

5. Connect an earth ground wire to the green ground screw.

Use a minimum 18 AWG wire rated up to +185 °F +(85 °C).

6. Connect the positive supply wire to the (+) terminal and

the negative supply wire to the (-) terminal.

7. Replace the cover of the transmitter.

 

WARNING Explosion hazard. Do not disconnect equipment unless

power has been switched off or the area is known to be

non-hazardous.

Explosion Proof (XP) is a method of designing equipment

for installation in hazardous areas. A hazardous location is

an area in which flammable gases or vapors are, or may be,

present in the air in quantities sufficient to produce explo-

sive or ignitable mixtures. The wiring for the transmitter

must be contained in Explosion Proof conduit extending

into the safe area. See Agency Approvals, Section 3.5.

To install Explosion Proof wiring:

1. Install Explosion Proof conduit from the safe area to the

conduit connection of the Echotel Model 355 transmitter

(refer to local plant or facility procedures).

2. Remove the cover of the transmitter.

3. Connect shield to an earth ground at the power supply.

4. Connect an Earth ground wire to the green ground screw

per local electrical code. Use a minimum 18 AWG wire

rated up to +185 °F (+85 °C).

5. Connect the positive supply wire to the (+) terminal and

the negative supply wire to the (-) terminal.

6. The cover must be completely installed before power may

be applied.

51-661 Echotel Model 355 Two-Wire Ultrasonic Transmitter

2.5 Configuring the Transmitter

Echotel Model 355 Ultrasonic Transmitters do not need to

be calibrated since they operate purely as time-of-flight

units based on the speed-of-sound. Configuring the

Model 355 for a specific level, volume, or open channel

flow application can be completed in minutes. Configura-

tion is easily performed at the vessel, or on a bench prior to

being installed in the field.



The following operating parameters are used in configuring

the Model 355 ultrasonic transmitter:

• Range: Distance from the face of the transducer to the

bottom of the vessel/channel.

• Blocking Distance: Minimum distance of 10" (250 mm)

in front of the transducer that is a “blind space” where the

transmitter cannot make any measurements.

• Level Offset: If any obstructions (heating coils, mixing

blades, angled bottoms, etc.) exist at the bottom of the tank,

a Level Offset can be set to ignore reflections from these ob-

jects.

• Distance: This is measured by the transmitter independent

of any of the configuration data. It is distance from the face

of the transducer to the target.

• Level: Computed by the transmitter as the configured

Range minus the measured Distance.



The Model 355 can be configured at a test bench by con-

necting a 24 VDC power supply directly to the transmitter

terminals. Section 2.4 shows the wiring connections. When

using a HART communicator for configuration, a mini-

mum 250 Ω line load resistance is required. See the HART

communicator manual for more information.

To verify basic operation the 355 can be pointed at a stable

target at an appropriate distance and held steady. This can

be accomplished by holding the unit 2 to 4 feet (610 to

1220 mm) from the floor and observing the display for 1–

2 minutes.



When power is first applied to the unit, the transmitter

goes through an initialization period. During this period

the unit will show “Initializing.” After approximately 30

seconds the Model 355 will either begin to display meas-

ured values such as “Level” and “Distance,” or display an-

other status screen if a diagnostic condition is present.

Range

Blocking

Distance

Distance (measure

Level

(range - distance)

Level Offset



51-661 Echotel Model 355 Two-Wire Ultrasonic Transmitter



The 355 transmitter has a local user interface consisting of a

2-line × 16-character liquid crystal display (LCD) and 4-

push-button keypad. All transmitter measurement data and

configuration information is shown in the LCD.

While configuring the unit with the local user interface the

transmitter cover is off and all 16 characters can be displayed

by the LCD. During normal operation the cover obscures

part of the LCD and only 12 characters are shown. For this

reason, the Measured Values and Diagnostic data are shown

as 12 characters per line so that they can be completely seen

through the cover window.

Model 355 is configured via a “tree” type menu structure,

where it is easy to access branches of the tree to configure the

various transmitter parameters. The four push buttons have

different functions for various operating modes within the

menu structure.

2.5.4.1 Menu Traversal Mode

When going from one branch of the menu to another the

push buttons operate as follows:

2.5.4.2 Character Data Entry Mode

This mode is most commonly used when entering a new

local tag into the 355 transmitter. The local tag as shipped

from the factory is “Model 355” but can be changed to

have the actual tag number of the vessel or primary ele-

ment. When entering data in the Character Data Entry

Mode, the leftmost character on the lower line of the LCD

will be a cursor. Data is entered at the cursor by using the

push buttons as follows:

Push button Keystroke Action

Up Moves to the previous item in the menu branch

Down Moves to the next item in the menu branch

Back Moves back one level to the previous higher branch item

Enter Enters into the lower level branch or switches to the entry mode

Push button Keystroke Action

Moves to the previous character (Z,Y,X,W). If held down the

characters scroll until the push button is released.

Down

Moves to the next item character (A,B,C,D). If held down the

characters scroll until the push button is released.

Back

Moves the cursor back to the left. If the cursor is already at the

leftmost position, then the screen is exited without changing the

original tag characters.

Enter

Moves the cursor forward to the right. If the cursor is at the

rightmost position, then the new tag is saved.

51-661 Echotel Model 355 Two-Wire Ultrasonic Transmitter

2.5.4.3 Numeric Digit Entry Mode

The Numeric Digit Entry Mode is used to enter most of

the numeric values in the System and I/O Configuration

screens. This mode is accessed when the Enter key is

pressed on a menu item that presents a saved numeric value

such as the Range setting. Data is entered at the cursor by

using the push buttons as follows:

NOTE: All numeric values are left-justified, and new values are en-

tered from left to right. A decimal point can be entered after

the first digit is entered, such that .9 is entered as 0.9.

NOTE: A few configuration items can have a negative value. In

this case, the leftmost position is reserved for the sign (ei-

ther “-“ for a negative value, or “+” for a positive value)

2.5.4.4 Increment/Decrement Digit Entry Mode

The Increment/Decrement Digit Entry Mode is used to

trim or revise some numeric values. An example is the Trim

Level screen in System Configuration which has a default

value of 0.0. When the Enter key is pushed in the Trim

Level screen, a double headed arrow (

◊

) is shown as the

rightmost character of the LCD lower line. When the (

◊

) is

present, the value can be revised by using the push buttons

as follows:

Push button Keystroke Action

Moves up to the next highest digit (0,1,2,3,....,9). If held down

the digits scroll until the push button is released.

Down

Moves down to the next lowest digit (9,8,7,6,….,0). If held down

the digits scroll until the push button is released.

Back

Moves the cursor to the left and deletes a digit. If the cursor is

already at the leftmost position, then the screen is exited

without changing the previously saved value.

Enter

Moves the cursor to the right. If the cursor is located at a blank

character position, the new value is saved.

Push button Keystroke Action

Increments the displayed value. If held down the digits scroll

until the push button is released. Depending on which screen is

being revised, the increment amount may increase by a factor of

10 after the value has been incremented 10 times.

Down

Decrements the displayed value. If held down the digits scroll

until the push button is released. Depending on which screen is

being revised, the decrement amount may increase by a factor

of 10 after the value has been decremented 10 times.

Back

Returns to the previous menu without changing the original

value, which is immediately redisplayed.

Enter Accepts the displayed value and returns to the previous menu.

51-661 Echotel Model 355 Two-Wire Ultrasonic Transmitter



The 355 transmitter can be password protected to restrict

access to certain portions of the menu structure that affect

the operation of the system. The default user password in-

stalled in the 355 transmitter at the factory is 0, which ef-

fectively disables the user password feature. This allows a

complete configuration to be done without entering a pass-

word.

If desired, a new user password can be entered in Advanced

Configuration in the New Password screen. The password

can be changed to any numerical value up to 255. If the pass-

word is changed from the factory default value of 0, then the

new password will be required whenever any configuration

values are changed.

NOTE: If the password is not known, the menu item New Password in

Advanced Configuration displays an encrypted value repre-

senting the present password. Contact the factory with this en-

crypted value to determine the actual password.



Configuration of the Model 355 is performed by use of a tree-

like menu structure. The figure on the next page shows an

overview of the top level menu items.



The Measured Values Menu (see page 15) contains all the

possible measured or calculated values that the 355 trans-

mitter can display for level, volume, and open channel flow

applications. For simple level applications there are many

screens (such as Volume, Flow, Head, and the totalizers)

that are not applicable and will show values of zero.

The Measured Values Menu is also used to add or remove pa-

rameters from the Home Menu. The Home Menu appears on

the LCD after the 355 is powered up and has gone through

the 30 second initialization period. Home Menu parameters

are shown as 12-characters or less, and have asterisks on either

side of the top line of the LCD. The Home Menu parameters

rotate at a 2-second interval on the LCD.

From the factory, the Home Menu will show the Level

value. To add or remove parameters from the Home Menu,

push the Enter key. Use the Up or Down keys

to remove them (Off Main Disp) or add them (On Main

Disp) from the rotating Home Menu display. To exit the

Measured Values screen push the Back key.

Any of the Measured Values screens can be left on the LCD

without returning to the rotating Home Menu. To return to

the rotating Home Menu, simply push the Back key

twice.

51-661 Echotel Model 355 Two-Wire Ultrasonic Transmitter



Measured Values

See Page 15

Volume Setup

See Page 18

Flow Setup

See Page 23

4-20 mA Config

See Page 30

Totalizers

See Page 32

Echo Profile

See Page 38

Diagnostics

See Page 41

Factory Config

See Page 45

Vessel Dims

See Page 18

Gen Eqn Factors

See Page 26

System Config

See Page 18

I/O Config

See Page 30

Advanced Config

See Page 34

This Configuration Menu Overview shows the top level of the

Model 355 firmware. See the referenced pages for further infor-

mation on each branch of the tree-like menu structure.

Run Mode

51-661 Echotel Model 355 Two-Wire Ultrasonic Transmitter



Level

nnnn units

P / DN

Volume

nnnn units

UP / DN

Flow

nnnn units

UP / DN

Head

nnnn units

UP / DN

Distance

nnnn units

UP / DN

DEL

% Output

nnn%

UP / DN

DEL

Loop Current

nn.nn mA

UP / DN

DEL

Local Tag

Model 355

UP / DN

DEL

Temperature

nn.n units

UP / DN

DEL

Totalizer R

nnnn units

UP / DN

DEL

Totalizer NR

nnnn units

UP / DN

DEL

Custom Unit

nnnn units

DEL

P / DN

easured Values

to select

UP / DN

System Config

to select

P / DN

IO Config

to select

UP / DN

Advanced Config

to select

UP / DN

Diagnostics

to select

UP / DN

Factory Config

to select

UP / DN

Run Mode

to select

UP / DN

Status

[Fault or Warning]

*[Label]*

[String or Value]

Model 355 HT

Ver 1.0 A

START

otating Screens

nly shown if fault or warning

hown for

2 Seconds

ENT

DEL

UP/DN

On Main Disp

Off Main Disp

51-661 Echotel Model 355 Two-Wire Ultrasonic Transmitter

 

The System Configuration Menu shown below contains all the parameters that are needed to configure the

355 for level applications. This menu is also used for Volume & Level and Flow & Level configurations:

anguage

[selection]

DEL





Francais

eutsch

spanol

P / DN

Measure Type

[selection]

DEL



olume & Level

Flow & Level

P / DN

Level Units

[selection]

DEL





Feet

Centimeters

Meters

UP / DN

Range

[entered value]

ENT

DEL

decimal entry

in selected units

P / DN

Blocking Dist

[entered value]

ENT

DEL



3.6 mA

22 mA

Latch 3.6 mA

Latch 22 mA

UP / DN

Safe Zone Fault

[selection]

ENT

DEL

decimal entry

in selected units

UP / DN

Safe Zone Height

[entered value]

ENT

DEL

decimal entry

in selected units

UP / DN

Level Offset

[entered value]

ENT

DEL

decimal entry

in selected units

UP / DN

Trim Level

[entered value]

UP / DN

ENT

DEL

[inc/dec]

in selected units

UP / DN

DEL

ystem Config

to select

P / DN

51-661 Echotel Model 355 Two-Wire Ultrasonic Transmitter

2.5.8.1 System Configuration Menu –

Level Applications

The System Configuration Menu on the opposite

page contains all the parameters that are needed to

configure the 355 for level applications. Additional

System Configuration parameters are used for vol-

ume (page 18) or open channel flow applications

(page 23). The following table provides an explana-

tion of each of the System Configuration parame-

ters for level applications.

 

Language The 355 can be configured in  (default value), ,  or .

Measure Type The 355 can be configured as a (default value), , or Open

Channel  transmitter.

Level Units A selection of (default value), , , or  is provided.

Should some other units of level be desired, the Custom Unit feature can be used in

the Advanced Configuration Menu.

Range

Range is defined as the distance from the face of the transducer to the bottom of the

tank for level applications. This distance needs to be measured accurately for proper

level indication. Factory default value is 240.0 inches.

Blocking Dist

The Blocking Distance is a “blind space” or “dead zone” immediately in front of the

transducer where level measurement cannot be made. The 355 defaults to a mini-

mum Blocking Distance of 10" (250 mm). If needed, a larger value can be entered to

help ignore potential false echoes originating from the bottom rim of a nozzle, or other

objects close to the transducer.

Safe Zone Fault

Ultrasonic transmitters cannot reliably measure level if the liquid enters the Blocking

Distance. For this reason, a Safe Zone (see drawing above) can be configured in a user-

defined area just below the Blocking Distance. If desired, a Safe Zone Fault can be set

to ensure safe, reliable high-level readings in critical applications. Choices are 

(default value), , , , or . If  or

 is chosen, the loop current will remain in alarm until it is manually cleared

with the Safe Zone Alarm Reset located in the Diagnostics Menu.

Safe Zone Height

Safe Zone Height is entered as the distance just below the Blocking Distance that es-

tablishes a Safe Zone. If the liquid level enters this zone the 355 will report the chosen

Safe Zone Fault. Factory default value is 2.0 inches.

Level Offset

A Level Offset (see drawing above) can be established at the bottom of the tank if any

obstructions (heating coils, mixing blades, angled bottoms, etc.) exist that have the

potential to create false level reflections. It is the distance from the bottom of the tank

to the lowest valid level reading. The 355 will not display any levels (on the LCD or the

mA loop) lower than the Level Offset value. Factory default value is 0.0".

Trim Level

Trim Level is an offset value (maximum of ± 10" or 25.4 cm) that can be used to force the

output the exact level. This should only be used after all parameters have been entered cor-

rectly, and it has been confirmed that the transmitter is tracking the correct level target.

Range

locking

Distance

Distance (measured)

Level

(range - distance)

Level Offset

Safe

Zone

51-661 Echotel Model 355 Two-Wire Ultrasonic Transmitter

2.5.8.2 System Configuration Menu –

Volume Applications

The level System Configuration parameters on pages 16 &

17 need to be entered before the volume configuration can

be done. Enter these parameters prior to starting the

volume configuration shown below.

Conical Height

[entered value]

UP / DN

ENT

DEL

Width

[entered value]

ENT

DEL

Length

[entered value]

ENT

DEL

decimal entry

in selected units

UP / DN

Ellipse End

[entered value]

ENT

DEL

UP / DN

Previous Menu

to select

UP / DN

ENT

DEL

Ellipse Height

[entered value]

ENT

DEL

UP / DN

Radius

[entered value]

ENT

DEL

UP / DN

DEL

Vessel Dims

ﬁ

to select

UP / DN

P / DN

Vessel Type

[selection]

DEL

Volume Units

[selection]

P / DN

DEL

Volume Setup

to select

UP / DN

DEL

P / DN

Rectangular

Horizontal/Flat

Horiz./Ellip.

Horiz./Sphere.

Spherical



Vertical/Ellip.

Vertical/Sphere

Vertical/Conical

Custom Table

ubic Feet

ubic Inches





illiliters

Liters

decimal entry

in selected units

decimal entry

in selected units

decimal entry

in selected units

decimal entry

in selected units

ecimal entry

n selected units

Verti/Ellip

only

Verti/Conical

only

Rectangular

only

Rectangular &

Horizontal only

Horiz/Ellipse

only

DEL

51-661 Echotel Model 355 Two-Wire Ultrasonic Transmitter

.5.8.2 System Configuration Menu –

Volume Applications (cont.)

The following table provides an explanation of each of the

System Configuration parameters for volume applications

that use one of the nine Vessel Types. See below and page

20 for dimensional information on all nine Vessel Types.

 

Volume Units A selection of  (factory default Volume Unit), , , ,

or , is provided. Should some other units of volume be desired, the

Custom Unit feature can be used in the Advanced Configuration Menu.

Vessel Type Select either  (factory default Vessel Type)





Note: Vessel Dims is the next screen only if a specific Vessel Type was selected. If Custom Table was selected, turn

to page 21 & 22 to select the Cust Table Type and Cust Table Vals.

Vessel Dims

Depending on which Vessel Type was selected, the next few screens will allow

entry of the vessel dimensions. See the vessel drawings below and on page 20 for

proper dimensions.

 is used for all Vessel Types with the exception of Rectangular vessels.

 is only used for Vertical/Ellip vessels.

 is only used for Vertical/Conical vessels.

 is only used for Rectangular vessels.

 is only used for Rectangular and the three Horizontal vessels.

 is only used for Horiz/Ellip vessels.

Previous Menu exits the Vessel Dims menu.









Vessel Types



51-661 Echotel Model 355 Two-Wire Ultrasonic Transmitter

























Vessel Types



























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Magnetrol Echotel 355 Operating instructions

Brand: Magnetrol

Model: Echotel 355

Category: Measuring, testing & control

Type: Operating instructions

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Magnetrol Echotel 355 Operating instructions

Magnetrol Echotel 355 Operating instructions

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