Siemens Sitrans LR260, Sitrans LR250 Application Manual

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APPLICATION GUIDE

SITRANS LR260/LR250 hybrid use on liquid applications

G050212

Equipment:

 SITRANS LR260 features higher gain microwave electronics, typically 15 dB higher than the

LR250. Configurations of SITRANS LR260 electronics and LR250 with 2” threaded process
connections are available as standard catalog items and others are available by special
request. Contact your Siemens representative.

While every effort was made to verify the following information, no warranty of accuracy or usability is expressed or
implied.

Applications

Appropriate applications for the LR260/250 hybrid are:

1. Longer range applications from 20 m (66 ft) to 30 m (98 ft).

2. Applications with low dielectric AND small process connections.

3. Challenging applications where turbulence or minor foam is present.

Configurations

2 inch threaded connection versions are released and available as standard options on the SITRANS LR260 catalog sheet. Any
other SITRANS LR250 process connection option is available by special request. Contact your Siemens representative.

SITRANS LR260 with 2”NPT process connection and antenna is shown below.

Siemens Canada Limited
Siemens Milltronics Process Instruments

1954 Technology Drive, P.O. Box 4225
Peterborough, Ontario
K9J 7B1 / Canada

Tel.: [phone]
Fax: [phone]
www.siemens.com/sensorsystems

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Signal Comparisons (Reference Conditions)

SITRANS LR250 - 2” horn SITRANS LR260 - 2” horn

APPLICATION GUIDE

A signal to noise ratio improvement of 18 dB is shown above. This gain improvement will be obtained on any target distance.

Specifications

All specifications and approvals will be per the SITRANS LR260 except process related specifications such as pressure and
process temperature as these will be derived from the LR250 process connection specification.

LR260 Programming for optimization on liquids

1. Use the Quick start wizard to setup the application then make the following additional changes:
a. Par 2.2.4.1 Algorithm: set to tF.
b. Par 2.2.4.1.2 Echo Position: set to COM.

i. COM (Center of Mass) detection method is recommended for flat surfaces (liquids) and

RE (Rising Edge) detection method is recommended for sloped surfaces (solids)

c. Par 2.2.4.3.7 Reform: set to 0. It is recommended that this filter only be used in solids applications.

SITRANS LR260/LR250 hybrid use on liquid applications

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