Siemens SIMATIC PCS 7 brochure Level measurement, Sitrans Probe LR, pulse radar

© Siemens AG 2011

		Level measurement
		Four different technologies are available for level measure-
		ment: Radar, capacitance, ultrasonic and Guided Wave Radar
		technology.
		Level measurement with contactless radar technology:
		• SITRANS LR400/LR460/LR560 with FMCW radar
		(Frequency Modulated Continuous Wave)
		• SITRANS LR200/LR250/LR260, pulse radar
		• SITRANS Probe LR, pulse radar
SITRANS F M MAGFLO	SITRANS FC MASSFLO	(radar measuring instruments are available with PROFIBUS
		PA and with HART protocol)

MASSFLO flow meters are not sensitive to fluctuations in pres- sure, temperature, density, electrical conductivity or viscosity. An ASIC guarantees improved reaction to discontinuities. The devices are practically unaffected by external noise – an es- sential requirement for raising the dynamic range.

MASS 6000 monitors both application-dependent faults and those device settings selected by the user:

•Excessive air in the measuring tube

•Empty tube detection

•Unstable flow signal

•Zero point error

•Density of fluid and temperature limits

•Measuring range limits

The user-specific settings are compared with the actual values to determine an optimal setting. Faults, caused by mechanical vibrations, cavitation or pump noises can affect the measure- ments.

Extended diagnostic functions in the MASS 6000 transmitter by means of intrinsic sensor resonance frequency, pick-up am- plitudes and signal-phase can identify these influences.

As NAMUR NE 107 is supported, extensive diagnostic func- tions are available in the Maintenance Station. This enables the maintenance personnel to adopt the necessary measures. From this standardized information (type and frequency of the alarms), the user can draw conclusions that indicate immi- nent failure or predictive maintenance. This enables step to be performed to improve the measurement quality or prevent a loss of production.

Level measurement with contactless ultrasonic technology:

•SITRANS Probe LU is available either with PROFIBUS PA or

HART

Level measurement with contacting capacitance measuring technology:

•POINTEK CLS 200/300

•SITRANS LC 300/500

POINTEK CLS 200/300 is available with PROFIBUS PA SITRANS LC 500 is available with HART

Level measurement with contacting Guided Wave Radar technology:

•SITRANS LG 200

SITRANS LG 200 is available with HART

Most Siemens level measuring instruments offer:

•Meaningful error messages to speed up troubleshooting

•Maintenance timers built into the measuring instrument for easy changes

•Internal electronics temperature sensor for advance war- ning before an electronics failure occurs

•Recording of minimum and maximum values of internal temperature and process variables for easier troubleshoo- ting

•PROFIBUS PA Condensed Status:

-Easy filtering of alarms sent to the operator or mainte- nance engineer (the right alarm to the right person)

-Full control of all alarms in the measuring instrument. This lets the user turn off all alarms that do not concern his respective application

•Enhanced EDDs (electronic device descriptions):

-Harmonized look and feel of different Siemens level measuring instruments and even of different Siemens measuring instruments

-Quick-start wizard for easy configuration and fewer setup errors

-Echo profiles can be stored for faster troubleshooting

18Monitoring and diagnostics