ULM-53 Ultrasonic level meters


  • For continuous level measurement of liquids (even if polluted), mash and paste materials in open or closed vessels, sumps, open channels, etc.
  • Variants of level meter with adjustment by two buttons, or by magnetic pen
  • Xi version for usage in explosive areas
  • State indication by two LEDs
  • Current output (4 ... 20 mA), voltage output (0 ... 10 V) or RS-485 Modbus output
  • Wide choice of electric connection via connectors, cable glands or protective conductor
  • While used with horn adapter can be measured also some difficult media (foamy levels, loose materials, etc.)

 

The ULM® ultrasonic level meters are compact measurement devices containing an ultrasonic transmitter and an electronic module. Using an transmitter, level meters transmit the series of ultrasonic pulses that spread towards the level surface. The transmitter recuperates reflected acoustic waves that are subsequently processed in the electronic module. Based on the period during which the individual pulses spread towards the level and back, this period is averaged by the electronics that performs temperature compensation and subsequently a conversion to an output current 4 -20 mA, voltage 0 - 10 V or output RS-485 Modbus.

The ULM® ultrasonic level meters are suitable 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 measurement range is reduced.

All setting-up is done using two buttons positioned in the upper part of the sensor. The level meter is equipped with optical state indication (STATE) and with a setting-up process (MENU). The level meter can output current or voltage signals. They are manufactured in model versions for non-explosive areas (N) and explosive areas (Xi).

Description

Features of variants

  • ULM– 53_– 01–_
    • Measuring range from 0.1 m to 1 m, plastic PVDF transmitter and plastic body (PP+HDPE), process connection with thread G ¾".
  • ULM– 53_–02–_
    • Measuring range from 0.2 m to 2 m, plastic PVDF transmitter and plastic body (PP+HDPE), process connection with thread G 1".
  • ULM– 53_–06–_
    • Measuring range from 0.2 m to 6 m, plastic PVDF transmitter and plastic body (PP+HDPE), process connection with thread G 1 ½".
  • ULM– 53_–10–_
    • Measuring range from 0.4 m to 10 m, plastic PVDF transmitter and plastic body (PP+HDPE), process connection with thread G 2 ¼".
  • ULM–53_–20–_
    • Measuring range from 0.5 m to 20 m, with plastic PVDF transmitter and plastic body (PP+HDPE), aluminium alloy flange.

 

Installation
Level meter is installed into the upper lid of the tank (vessel), using a fixing nut or a flange.
If installed in an open channel (sumps, reservoirs, etc.), install the level meter as closest as you can to the maximum level expected.
The front of the level meter must run in parallel to the measured level.
Emitted acoustic signal must not be affected by near objects (stiffeners, ladders, mixers, unevenness, etc.), stream of filling, air flow, etc.
Foam on the level absorbs the acoustic wave reflection which might cause malfunction of the level meter. If possible select the location where the foaming is as low as possible. Protect the level meter against direct sunlight.
In the case of uncertainty we recommend to consult the application with the producer.

 

Electric connection

Connection through ISO connector

  • The ULM level meter with a G type cable gland are connected to processing (display) units by means of a cable with an outer diameter of 6 to 8 mm (recommended wire cross-section 0.5 to 0.75 mm2), via a detachable ISO connector with inner screw terminals, which is part of the delivery. The connection diagram and the inner view of the connector are shown in Figures on the right. Non-detachable connector IP67 with PVC cable 5 m long can be supplied as an extra option.

Connection through M12 connector

  • The ULM level meter with a C type cable gland are connected to processing (display) units by means of a cable with an outer diameter of 4 to 6 mm (recommended wire cross-section 0.5 to 0.75 mm2), via a connector socket with a moulded cable (2 or 5 m long) or via a detachable connector socket without a cable (see accessories). In this case connect the cable to the inner socket pins under figures on the right.

Connection via PG 11 gland or gland for protective hoses

  • The ULM level meter or ULS sensor with a B or H type cable gland are connected to processing (display) units by means of a fixed PVC cable 5 m long. PG 11 (B) or plastic bushings with a thread for protective hoses (H) can be used as a cable gland. Connection diagrams are shown in Figures on the right.

 

WARNING:

  • Wiring operations shall only be carried out without voltage!
  • Taking into account the potential occurrence of electrostatic discharge on non-conducting parts of the level meter, it is necessary to ground the flange of level meters ULM–53Xi–20–F, located in an explosive atmosphere, using a ground terminal!
  • Wiring operations shall only be carried out without voltage!
  • Taking into account the potential occurrence of electrostatic discharge on non-conducting parts of the level meter, it is necessary to ground the flange of level meters ULM–53Xi–20–F, located in an explosive atmosphere, using a ground terminal!

  • The supply source should be preferably designed as a stabilized source of safe voltage 18 V to 36 V DC (max. 30 V DC for version Xi), which is part of the downstream processing or display system.

  • In case of strong ambient electromagnetic disturbance, parallel run of the input cable with the power line or its length exceeding 30 m, we recommend using a shielded cable.

 

Set-up elements

Device type with setting using buttons

  • The measuring range is setup by means of two buttons "DOWN" and "UP".The "DOWN" button is used to enter to the setting mode (setting the 4 mA or 0 V limit) and to decrease the output current or voltage. The "UP" button as an opposite function (setting the 20 mA or 10 V limit and increasing the output current or voltage). Values are confirmed by simultaneous pressing of both buttons for about 1 sec. The setting process is indicated by yellow "STATE" LED indicator.       For detailed information please read at the instructions manual.

Device type with setting using a magnetic pen

  • The measuring range is setup by touching of the magnetic pen to sensitive spots "EMPTY" and "FULL" . The "EMPTY" spot is used to enter to the setting mode (setting the 4 mA or 0 V limit) and to decrease the output current or voltage. The "FULL" spot as an opposite function (setting the 20 mA or 10 V limit and increasing the output current or voltage). Values are confirmed by touching of the magnetic pen to the sensitive spot for about 3 sec. The setting process is indicated by yellow "STATE" LED indicator.
    For detailed information please read at the instructions manual.

 

Range of application

Thanks to the proximity principle employed, the devices are suitable for continuous or limit measurement of the level of liquids, waste water, sludge, suspensions, adhesives, resins in various open and closed vessels, sumps, open channels and drains.
Applicability for measuring the surface level of loose materials is limited, the range of measurement is shorter there.

 

Correct specification examples

  • ULM–53N–02–G–I–G–T

  • ULM–53N–20–F–U–H–M

  • ULM–53Xi–06–G–I–B–M

  • ULM–53N–10–G–M–C–L

 

Accessories

standard (included in device price)

  • 1x seal (for UL_–53_– 01; 02; 06, 10)
  • 1x connector with IP67 coverage (for versions with an ISO connector)
  • 1x magnetic pen MP–8 (for device type adjusted with a magnetic pen)
  • free-to-download programme Basic Scada Level (for the Modbus version)

optional (for a extra charge)

 

  • stainless steel or plastic fastening nuts G ¾”, G1", G1 ½" and G2 ¼
  • stainless steel or plastic lugs G ¾”, G1“, G1 ½” and G2 ¼
  • horn adapter ST–G1 (thread G1"), ST–G1,5 and ST–G2,25
  • socket ELWIKA 4012 K PG7
  • connector with IP67 coverage (type GAN-DADE 7A) with 5m cable (for current output and ISO type connector)
  • connector with IP67 coverage (type GAN-DAEE 7A) with 5m cable (for voltage output and ISO type connector)
  • converter URC-485 (for the Modbus version)

 

Protection, safety, compatibility and explosion-proof design
The ULM-53 level meter is equipped with protection against reverse polarity of the supply voltage and against short voltage surges and with protection against current overload at the output.
Protection against dangerous contact is provided by low safe voltage under EN 33 2000-4-41.
Electromagnetic compatibility complies with EN 55011/B, EN 61326-1 and EN 61000-4-2 to 6.
The explosion-proof design of types ULM–53Xi is provided in conformity to the standards: EN 60079-0 : 2007; EN 60079-11 : 2007 and EN 60079-26 : 2007.
Explosion-proof design is certified by FTZÚ–AO 210 Ostrava–Radvanice, Report No.: FTZÚ 09 ATEX 0119X.

A declaration of conformity has been issued for this device in accordance with Act No. 22/1997 Coll., as amended. The supplied electrical device conforms to the applicable government regulations concerning safety and electromagnetic compatibility.

 

Specifications

principe Ultrasoon
House
meetelement
Process Connection thread G ", DIN flanges
uitgang 4..20 mA
Nominal diameter
Brand Dinel
materiaal
Manometer diameter
glycerine
Hygienic Non hygienic
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