Dinel ULM -70 Series Manual de usuario

INSTRUCTION MANUAL

Read carefully the instructions published in this manual before the ﬁrst use of the level meters. Keep the manual

at a safe place. The manufacturer reserves the right to implement changes without prior notice.

ULTRASONIC LEVEL METERS ULM–70

CONTENTS

Safety ...............................................................................................................................................3

Measuring principle..........................................................................................................................3

Range of application ........................................................................................................................3

Features of variants .........................................................................................................................3

Dimensional drawings ....................................................................................................................4

Installation instructions ....................................................................................................................5

Electrical connection ......................................................................................................................8

Set-up elements...............................................................................................................................9

Status signalization..........................................................................................................................9

Operation .......................................................................................................................................10

Basic settings.................................................................................................................................10

Advanced settings..........................................................................................................................13

Additional functions........................................................................................................................15

HART communication protocol......................................................................................................18

Order code .....................................................................................................................................18

Accessories....................................................................................................................................18

Safety, protection, compatibility and explosion proof....................................................................19

Use, manipulation and maintenance .............................................................................................19

Marking of labels............................................................................................................................20

Menu structure ...............................................................................................................................22

Technical speciﬁcations.................................................................................................................23

Area classiﬁcation..........................................................................................................................24

Factory default ...............................................................................................................................24

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SAFETY

All operations described in this instruction manual have to be carried out only by trained personnel

or an accredited person. Warranty and post warranty service must be exclusively carried out by

the manufacturer.

Improper use, installation or set-up of the level meter can result in crashes in the application (over-

ﬁlling of the tank or damage of system components).

The manufacturer is not responsible for improper use, losses of work caused by either direct or

indirect damage, and for expenses incurred during installation or use of the level meter.

MEASURING PRINCIPLE

The ULM® ultrasonic level meters are compact measurement devices including an electroacoustic

converter and an electronic module. Using the electroacoustic converter, the level meters transmit

the sequence of ultrasonic pulses that spread towards the surface level. The converter recuper-

ates reﬂected acoustic waves that are subsequently processed in the electronic module. The

intelligent evaluation block ﬁlters out interfering signals, compares the cleaned received signal

with the false reﬂection map (e.g. from mixers, ladders, reinforcement etc.) and selects a suitable

reﬂection (echo). Based on the period during which the individual pulses spread towards the

surface level and back and based on the measured temperature in the tank, the instant distance

to the surface level is calculated. According to the level height, the level meter output is set and

the measured value is displayed on the display.

RANGE OF APPLICATIONS

For continuous non-contact level measurement of liquids (water solutions, sewerage water, etc.),

mash and paste materials (sediments, sticks, resins etc.) in closed or open vessels, sumps,

reservoirs and open channels. In case the level of bulk-solid materials is measured, the meas-

urement range is reduced.

The level meters can continuously measure levels of bulk-solid materials with a low concentration

of dust particles. Consult the manufacturer on recommended use of the level meter for bulk-solid

materials.

ULM–70_–02–I Measuring range from 0.15m to 2m, plastic PVDF transmitter, mechanical

connection with thread G 1".

ULM–70_–06–I Measuring range from 0.25m to 6m, plastic PVDF transmitter, mechanical

connection with thread G 1 ½".

ULM–70_–10–I Measuring range from 0.4m to 10m, plastic PVDF transmitter, mechanical

connection with HDPE polyethylene ﬂange (version "N") or aluminium alloy

ﬂange (version "Xi").

ULM–70_–20–I Measuring range from 0.5m to 20m, plastic PVDF transmitter, mechanical

connection with aluminium alloy ﬂange.

FEATURES OF VARI ANTS

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DIMENSIONAL DRAWINGS

ULM–70_–02–I ULM–70_–06–I

ULM–70N–10–I

ULM–70_–20–I

ULM–70Xi–10–I

Al alloy

HDPE

Pg11 cable gland

Ground terminal

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Fig. 2: Level meter dead zone

m – Dead zone

INSTALLATION INSTRUCTIONS

Install the level meter in the• vertical position into the upper lid of the tank or reservoir using

a welding ﬂange, a fastening nut or a ﬂange so that the level meter axis can be perpendicular to

the surface level of the measured liquid (Fig. 1).

The min.• dimensional parameters to install the

level meter into a lid or a ceiling of a tank are given

in Fig. 3.

When installing in an• open channel (reservoir, drain

etc.), install the level meter onto a bracket as close as

possible to the expected max. level.

In connection with the measurement principle, no•

signals reﬂected in the area immediately under the

level meter can be evaluated (dead zone). The dead

zone (Fig. 2) determines the min. distance possible

between the level meter and the highest surface lev-

el. The min. distances to the medium are given in the

chapter "Technical speciﬁcations" (p. 24).

It is necessary to install the level meter so that the•

bin level cannot interfere with the dead zone when

ﬁlled up to the maximum. If the measured level in-

terferes with the dead zone, the level meter will not

work properly.

Fig. 1: Recommended installation

in the tank

Fig. 4: Possible installation of the installation neck

a – Neck height

b – Neck width

m – Dead zone

ULM–70–02;06 a <3 b

b>100 mm

ULM–70–10 a<1,5 b

b>100 mm

ULM–70–20 a<1,5 b

b>150 mm

Fig. 3: Installation distance from the tank wall

ULM–70–02;10 d >1/12 c

(min. 200 mm)

ULM–70–06 d>1/8 c

(min. 200 mm)

ULM–70–20 d>1/10 c

(min. 200 mm)

d – Distance from

the tank wall

c – Measurement

range of the level

meter

If the maximum surface level in the tank interferes with the dead zone, the level meter has•

to be mounted into a higher installation neck. In this way, the tank can be ﬁlled nearly up to

the maximum volume. The inner neck surface has to be even and smooth (without edges and

welded joints); the inner edge should be rounded where the ultrasonic wave leaves the pipe.

The neck diameter should be as large as possible but the neck height should be as low as

possible. Recommended dimensions of the input neck are given in Fig. 4.

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During ﬁlling, mixing and other processes,• foam

can arise on the surface level of the measured

liquid. The thick foam considerably absorbs the

ultrasonic signal which might cause malfunction

of the level meter (Fig. 5). For such cases, it is

necessary to set up "SENSITIVITY" mode (p. 14)

to "high" or contact the manufacturer if need.

If the emitted acoustic signal of the level meter•

is affected by near objects (roughness on walls

of the tank, various partitions, mixers etc.), it is

necessary to map false reﬂections by activating

the mode "TEACHING" (see p. 14). In case of in-

stalled mixers, it is necessary to put the mixers

to position under the level meter (direct the mixer

blade to the ultrasonic signal beam).

Fig. 6: False echo from obstacles in

the tank

Fig. 8: Level meter installation outside the inﬂuence of ﬁlling

Fig. 5: Thick foam on the surface

Do not install the level meter in or above the• ﬁlling point (Fig. 8).

In case the level of bulk-solid materials is measured, the measurement range is reduced. We•

recommend to consult the use with the manufacturer.

Fig. 7: False echo from the mixer blade

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Fig. 13: Intensely stirred surface

Fig. 10: Prevention to avoid

intrusion of humidity

Fig. 9: Solar radiation shielding cover

The level meter must not be installed in places•

with direct solar radiation and must be protected

against weather effects.

If the installation in places with direct solar ra-•

diation is inevitable, it is necessary to mount

a shielding cover above the level meter.

It is suitable to run the cable under a cable bush-•

ing (obliquely down in slack) according to Fig. 10

to prevent penetration of humidity. Then the

rain and condensing water can ﬂow off freely.

The cable bushing and connector have to be• suf-

ﬁciently tightened to prevent penetration of hu-

midity.

To lower the minimum distance to the measured•

medium, a reﬂection board made from solid,

even and smooth material can be installed to the

level meter. Then the tank can be ﬁlled nearly up

to the maximum height. The solution is suitable

for open tanks and reservoirs.

Scattering or attenuation of the ultrasonic signal•

can result if the surface level has been moder-

ately stirred or rippled (by a mixer, coming liq-

uid etc.). It can result in reduction of the meas-

urement range or unreliable function of the level

meter (Fig. 12).

Rotating mixer blades can cause• that the sur-

face is stirred, which results in false reﬂections of

the ultrasonic signal from the surface level and

unreliable operation of the level meter (Fig. 13).

Fig. 12: Moderately stirred surface

Fig. 11: Reﬂection board

H + L = Dead zone

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ELECTRICAL CONNECTION

The ultrasonic level meter is designed to be connected to supply unit or to controller through a cable

with the outer diameter of 6 ÷ 8mm (recommended cross-section of cores 0.5 ÷ 0.75 mm2) by means

of bolted clips placed under display module. Connect the plus pole (+U) to the terminal (+), the minus

pole to 0V to the terminal (-) and the shielding to

the terminal ( ) (only for shielded cables).

Procedure to connect the cable to the level

meter:

Unscrew the nut of the upper transparent lid.1.

Take the upper edge of the display module and2.

take it out carefully by mild swinging up.

If you cannot grasp the module, you can use3.

a small screwdriver. Insert it as far as the

seam and use from several sides to slightly

lift the module.

Release the cable bushing and thread the4.

stripped supply cable in.

Connectthecableintothe bolted clips according5.

to the diagram in Fig. 14.

Assemble the level meter and connect the6.

cable to the sequential unit.

Fig. 14: Connection diagram of the

level meter

Fig. 15: Internal view of terminal

block

Make the electric connection in voltage-free state!

The power supply can be a stabilized voltage supply unit of 18 ÷ 36V DC (version Xi - 30V DC) that

is included in evaluation or display unit.

Considering possible occurrence of electrostatic charge on non-conducting parts of the level me-

ter, it is necessary to ground all level meters intended for environments with risk of explosion

(ULM–70Xi–_ _–I). It will be done using a screw placed on the head of the level meter under the

cable bushing.

Display unit

connector

Termi nal

block

Metal clip

utton Symbol in the manual [OK]

– Set-up mode access

– Conﬁrmation of selected item in the menu

– Move the cursor in the line

– Saving of set-up data

Button Symbol in the manual [ ↑↓]

– Move in the menu

– Change of values

Button Symbol in the manual [ESC]

– Cancelling of carried out changes

– Shift one level up

Teaching

mode activation Echo receiving Units

Display

of measured values

Set-up elements

Ultrasonic transmitter

Upper lid nut

Cable gland

Control buttons

OLED display Label

Fig. 16: Full view of ultrasonic level meter

STATUS SIGNALIZATION

display function

"NO ECHO" Lighting intermittently – the level meter is not able to receive echo

for a long time. Incorrect installation of the level meter

"DEAD ZONE" Lighting intermittently –the measured level is in the "dead zone" of

the level meter or the ultrasonic converter is dirty.

"NO PASSWORD"

It will appear in the item "MENU" –the level meter is protected

using a password against unauthorised setting. Enter the correct

password (see p. 17).

symbol "T" 1) Lighting permanently –"TEACHING" mode activation.

symbol "E" 1) Lighting intermittently –correct echo receiving (of the reﬂected

signal) from the measured surface level.

1) symbol appears in the lower left corner of the display

SET-UP ELEMENTS

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"AUTO MIN" (Automatic setting of the 4mA limit)

After the mode is enabled, the actual measured level will be set as the min. level. The 4mA value

will be assigned to the level meter output. The setting is recommended only if the tank can be

ﬂooded up to the required min. height.

BASIC SETTINGS

Before the ﬁrst starting, you must carry out the basic conﬁguration

of the level meter. The settings are accessible in the basic menu

under the item "BASIC ADJUSTMENT".

ACTUAL LEVEL: Actual distance in mm

DISP: Display of measured values on the display

U: Unit selection (mm, cm, m, l, m3,mA, %)

ACTUAL LEVEL: Actual distance in mm

DISP: Display of measured values on the display

U: Unit selection (mm, cm, m, l, m3,mA, %)

OPERATION

Set the level meter using 3 buttons placed on the display module (see Chapter Set-up elements).

After 5 min. of inactivity, the level meter automatically returns back to the measurement mode.

If the password is active, the level meter will be also locked. The values that have not been

conﬁrmed using the button [OK]will not be saved! After the meter is locked, you cannot change

the setting! When you attempt to edit, the words "NO PASSWORD" will appear on the display.

How to unlock the level meter is given on page 17.

1. Fill up the tank up to the required level.

2. Press the button [OK]to access the basic menu. Use the same button to select the item "BASIC

ADJUSTMENT" and then "AUTO MIN".

3. Now the item "AUTO MIN" is displayed. The level meter assigns the 4mA value for the measured

value automatically.

4. Using the buttons [OK]and [

↑↓

], set the values to display on the display "DISP" and select the

units "U".

5. After the setting is completed, save the data using the button [OK]. By repeated pressing the

button [ESC], you leave the menu and the display of the level meter and return back to the

measurement mode.

"AUTO MAX" (Automatic setting of 20 mA limit)

After the mode is enabled, the actual measured level will be set as the max. level. The 20mA value

will be assigned to the level meter output. The setting is recommended only if the tank can be

ﬂooded up to the required max. height.

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