Siemens SITRANS L LU150 User manual

SITRANS LU150
SITRANS L
Ultrasonic transmitters
SITRANS LU150
Operating Instructions
7ML5201 (SITRANS LU150)
10/2021
A5E34590123
-AC
Introduction
1
Description
2
Installing and mounting
3
Connecting
4
Commissioning
5
Operating
6
Troubleshooting
7
Technical specifications
8
Product documentation and
support
A
Appendix
B

Siemens AG
Digital Industries
Postfach 48 48
90026 NÜRNBERG
GERMANY
Document order number: A5E34590123
Ⓟ
11/2021 Subject to change
Copyright © Siemens AG 2021.
All rights reserved
Legal information
Warning notice system
This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent
damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert
symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are
graded according to the degree of danger.
DANGER
indicates that death or severe personal injury will result if proper precautions are not taken.
WARNING
indicates that death or severe personal injury may result if proper precautions are not taken.
CAUTION
indicates that minor personal injury can result if proper precautions are not taken.
NOTICE
indicates that property damage can result if proper precautions are not taken.
If more than one degree of danger is present, the warning notice representing the highest degree of danger will
be used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to
property damage.
Qualified Personnel
The product/system described in this documentation may be operated only by personnel qualified for the specific
task in accordance with the relevant documentation, in particular its warning notices and safety instructions.
Qualified personnel are those who, based on their training and experience, are capable of identifying risks and
avoiding potential hazards when working with these products/systems.
Proper use of Siemens products
Note the following:
WARNING
Siemens products may only be used for the applications described in the catalog and in the relevant technical
documentation. If products and components from other manufacturers are used, these must be recommended
or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and
maintenance are required to ensure that the products operate safely and without any problems. The permissible
ambient conditions must be complied with. The information in the relevant documentation must be observed.
Trademarks
All names identified by ® are registered trademarks of Siemens AG. The remaining trademarks in this publication
may be trademarks whose use by third parties for their own purposes could violate the rights of the owner.
Disclaimer of Liability
We have reviewed the contents of this publication to ensure consistency with the hardware and software
described. Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the
information in this publication is reviewed regularly and any necessary corrections are included in subsequent
editions.

SITRANS LU150
Operating Instructions, 10/2021, A5E34590123-AC 3
Table of contents
1 Introduction ........................................................................................................................................... 5
2 Description............................................................................................................................................. 6
3 Installing and mounting ........................................................................................................................ 7
3.1 Environmental ..................................................................................................................... 7
3.2 Location .............................................................................................................................. 7
3.3 Threaded............................................................................................................................. 8
3.4 Flange adapter (optional)..................................................................................................... 9
3.5 4" Sanitary......................................................................................................................... 10
3.6 LU150 with FMS200 mounting bracket .............................................................................. 13
4 Connecting .......................................................................................................................................... 14
4.1 Cable entry........................................................................................................................ 14
4.2 System diagram................................................................................................................. 15
4.3 Wiring connection ............................................................................................................. 15
5 Commissioning .................................................................................................................................... 16
5.1 Start up ............................................................................................................................. 16
5.2 Calibration......................................................................................................................... 17
5.3 Calibration: reference method............................................................................................ 17
5.4 4 mA calibration ................................................................................................................ 18
5.5 20 mA calibration .............................................................................................................. 18
5.6 Operation status................................................................................................................ 19
6 Operating............................................................................................................................................. 20
6.1 Adjustments ...................................................................................................................... 20
6.2 Calibration, scrolling method ............................................................................................. 21
6.3 4 mA calibration ................................................................................................................ 21
6.4 20 mA calibration .............................................................................................................. 22
6.5 Blanking ............................................................................................................................ 22
6.6 Adjusting the blanking value.............................................................................................. 23
6.7 Speed of response ............................................................................................................. 24
6.8 Adjusting the speed of response ........................................................................................ 25
6.9 Fail-safe............................................................................................................................. 25
6.10 Adjusting the fail-safe setting............................................................................................. 26

Table of contents
SITRANS LU150
4Operating Instructions, 10/2021, A5E34590123-AC
6.11 Fail-safe timer.................................................................................................................... 26
6.12 Adjusting the fail-safe timer............................................................................................... 26
6.13 Units ................................................................................................................................. 27
6.14 Adjusting the units ............................................................................................................ 27
7 Troubleshooting .................................................................................................................................. 28
7.1 Troubleshooting ................................................................................................................ 28
8 Technical specifications....................................................................................................................... 29
8.1 Power................................................................................................................................ 29
8.2 Performance...................................................................................................................... 29
8.3 Interface............................................................................................................................ 29
8.4 Outputs............................................................................................................................. 30
8.5 Construction...................................................................................................................... 30
8.6 Operating conditions ......................................................................................................... 31
8.7 Approvals .......................................................................................................................... 31
A Product documentation and support .................................................................................................. 32
A.1 Product documentation ..................................................................................................... 32
A.2 Technical support .............................................................................................................. 33
B Appendix ............................................................................................................................................. 34
B.1 Measurement interval........................................................................................................ 34
Index.................................................................................................................................................... 35

SITRANS LU150
Operating Instructions, 10/2021, A5E34590123-AC 5
Introduction
1
Note
For industrial use only
This product is intended for use in industrial areas. Operation of this equipment in a
residential area may cause interference to several frequency based communications.
Note
Unit repair
All changes and repairs must be done by qualified personnel, an
d applicable safety
regulations must be followed. Please note the following:
•
The user is responsible for all changes and repairs made to the device.
•
All new components must be provided by Siemens.
•
Restrict repair to faulty components only.
•
Do not re-use faulty components.

SITRANS LU150
6Operating Instructions, 10/2021, A5E34590123-AC
Description
2
The SITRANS LU150 is an ultrasonic level monitor combining sensor and electronics in a
single package. It is designed to measure liquid levels in open or closed vessels. The process
part (sensor) is PVDF, allowing the SITRANS LU150 to be used in a wide variety of industries,
especially food and chemical.
The sensor houses the ultrasonic transducer and temperature sensing element. The SITRANS
LU150 emits a series of ultrasonic pulses from the transducer. Each pulse is reflected as an
echo from the material and sensed by the transducer. The echo is processed by the SITRANS
LU150 using Siemens' proven ‘Sonic Intelligence’ techniques. Filtering is applied to help
discriminate between the true echo from the material, and false echoes from acoustical and
electrical noises and agitator blades in motion. The time for the pulse to travel to the material
and back is temperature compensated and then converted into distance for the mA output.

SITRANS LU150
Operating Instructions, 10/2021, A5E34590123-AC 7
Installing and mounting
3
3.1 Environmental
The SITRANS LU150 should be mounted in an area that is within the temperature range
specified, and that is suitable to the housing rating and materials of construction.
It is advisable to keep the device away from high voltage or current runs, contactors and SCR
control drives.
3.2 Location
Locate the SITRANS LU150 so that it
will have a clear sound path that is
perpendicular to the liquid surface.
The SITRANS LU150 sound path should not
intersect the fill path, rough walls, seams,
rungs, etc.
①
Sanitary ferrule
④
Seams
②
Pipe
⑤
Fill
③
Rungs
Note
Mount the SITRANS LU150 so that the face of the sensor is at least 25 cm above the highest
anticipated level.

Installing and mounting
3.3 Threaded
SITRANS LU150
8Operating Instructions, 10/2021, A5E34590123-AC
3.3 Threaded
①
Electronics
②
Mounting thread
③
Sensor
The SITRANS LU150 is available in three thread types:
1. 2" NPT ((Taper), ASME B1.20.1)
2. R 2" ((BSPT), EN 10226)
3. G 2" ((BSPP), EN ISO 228-1)
Note
Before inserting the SITRANS LU150 into its mounting hole, ensure that the threads are of the
same type to avoid damaging the device.

Installing and mounting
3.4 Flange adapter (optional)
SITRANS LU150
Operating Instructions, 10/2021, A5E34590123-AC 9
3.4 Flange adapter (optional)
The SITRANS LU150 can be fitted with the optional 75 mm (3") flange adapter for mating to
3" ASME, DIN 65PN10 and JIS 10K3B flanges.
①
SITRANS LU150
②
Optional flange adapter (2" NPT - 7ML1830-1BT, 2" BSPT - 7ML1830-1BU)

Installing and mounting
3.5 4" Sanitary
SITRANS LU150
10 Operating Instructions, 10/2021, A5E34590123-AC
3.5 4" Sanitary
Note
•
The sanitary version is suitable for chemical clean-in-place applications to 60 °C (140 °F)
only. Ensure your cleaning chemicals are compatible with PVDF.
①
Electronics
②
Mounting thread
③
Sensor
Mounting the sanitary version
1. Mount the SITRANS LU150 onto the top of the tank’s sanitary ferrule.
2. Secure mating by surrounding the joint with the clamp.
3. Tighten adjusting wing nut.

Installing and mounting
3.5 4" Sanitary
SITRANS LU150
Operating Instructions, 10/2021, A5E34590123-AC 11
①
SITRANS LU150
④
Ferrule
②
Clamp
⑤
Tank
③
Adjusting wing nut

Installing and mounting
3.5 4" Sanitary
SITRANS LU150
12 Operating Instructions, 10/2021, A5E34590123-AC
4" Sanitary ferrule
Note
The inside of sanitary ferrule must be smooth, and free of burrs, seams or ridges.

Installing and mounting
3.6 LU150 with FMS200 mounting bracket
SITRANS LU150
Operating Instructions, 10/2021, A5E34590123-AC 13
3.6 LU150 with FMS200 mounting bracket
①
LU150
②FMS200 mounting bracket (7ML1830-1BK) with 7ML1830-1DT (Locknut, 2" NPT) or
7ML1830-1DQ (Locknut, 2" BSPT).

SITRANS LU150
14 Operating Instructions, 10/2021, A5E34590123-AC
Connecting
4
4.1 Cable entry
1. Loosen lid and remove it.
2. Install cable gland or conduit.
3. Insert wires through gland or conduit and up through cable guide.
4. Connect wiring.
5. Replace lid and tighten it.
* Lid removed for clarity
Note
•
To maintain IP and NEMA ratings, tighten the lid between 4 to 4.5 Nm.
•
Ensure the cable gland is screwed in to the enclosure tightly and the cable is within the
specified clamping range (6.5 to 12 mm).
•
User supplied cable glands must meet IP68/NEMA 6 ratings and be installed according to
the manufacturer's instructions.

Connecting
4.2 System diagram
SITRANS LU150
Operating Instructions, 10/2021, A5E34590123-AC 15
4.2 System diagram
①
SITRANS LU150
②
Loop instrumentation
4.3 Wiring connection
①
SITRANS LU150
④
V supply
②
Loop instrumentation
③
R max
Note
Power supply is reverse polarity protected.

SITRANS LU150
16 Operating Instructions, 10/2021, A5E34590123-AC
Commissioning
5
5.1 Start up
1. With the SITRANS LU150 correctly installed (or aimed at a wall 0.25 to 5 m away), apply
power.
The device starts up, displaying the following:
①
'4' key
⑤
Units
②
'20' key
⑥
LOE/fault
③
Program mode
⑦
Operation status
④
Alphanumeric
2. It then defaults to the Run mode, which is the measurement reading of the distance from
the transducer face to the material level in the units indicated as shown:
3. If the default display differs from that shown, refer to SITRANS LU150.

Commissioning
5.2 Calibration
SITRANS LU150
Operating Instructions, 10/2021, A5E34590123-AC 17
5.2 Calibration
The calibration of the mA output may be done such that its span will be either proportional or
inversely proportional to the material level.
Note
The 4 and 20 mA levels may be calibrated in any order.
Proportional span
Inversely proportional span
high level = 20 mA
high level = 4 mA
low level = 4 mA
low level = 20 mA
5.3 Calibration: reference method
1. Adjust the material level (or target) to the desired distance from the sensor face.
2. Press the “4” or “20”key (as appropriate) to view the stored distance associated with that
mA output value.
3. Press the key a second time to set the new distance reference.
4. After viewing or calibrating, the unit operation automatically reverts to the Run mode (6
sec). The calibration value is referenced from the face of SITRANS LU150 sensor, in the units
displayed.

Commissioning
5.4 4 mA calibration
SITRANS LU150
18 Operating Instructions, 10/2021, A5E34590123-AC
5.4 4 mA calibration
Press "4"
Press "4" again
4 mA calibration
calibration invalid if
new 4 mA calibration
retry
5.5 20 mA calibration
Press "20"
Press "20" again
20 mA calibration
calibration invalid if
new 20 mA calibration
retry
Note
Calibration bypasses the measurement response rate.

Commissioning
5.6 Operation status
SITRANS LU150
Operating Instructions, 10/2021, A5E34590123-AC 19
5.6 Operation status
The graphic portion of the display gives the user a visual indication of the SITRANS LU150
operating status. During commissioning, viewing the graphic can assist the user in properly
locating and installing the unit to achieve optimum performance.
①
GOOD
②
WAITING
③
LOE / FAULT
The graphic will change from full to partial to indicate operation status. After the 'Waiting'
period, the '?' icon will appear for an 'LOE / FAULT' indication. When a valid echo is again
received, a 'Good' indication will resume. Refer to Troubleshooting (Page 28).

SITRANS LU150
20 Operating Instructions, 10/2021, A5E34590123-AC
Operating
6
6.1 Adjustments
There are several operating adjustments that can be made to the SITRANS LU150.
To access the operating adjustments, simultaneously press the "4" and "20" keys until the
desired adjustment is obtained. A viewing sequence of the stored value is automatically
initiated. During this time the value can be changed by pressing either the "4" or "20" key.
After viewing or changing, operation automatically reverts to the Run mode (6 secs).
Adjustment
Display
4 mA calibration (Page 21), scrolling
20 mA calibration (Page 22), scrolling
Blanking (Page 22)
Speed of response (Page 24)
Fail-safe (Page 25)
Fail-safe timer (Page 26)
Units (Page 27)
Note
Calibration bypasses the measurement response rate.