SITRANS LG series

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The Siemens SITRANS LG series are guided wave radar transmitters for level, level/interface, and volume measurement of liquids and solids. The SITRANS LG product line can handle changes in process conditions, high temperatures and pressures, and steam.

Область применения

The SITRANS LG series comes in four different models, depending on the applications, level of performance, and functionality required:

SITRANS LG240 offers configuration options for your hygienic and corrosive application requirements
SITRANS LG250 Highly flexible solution for liquid level and interface applications. Extremely versatile offering solutions for storage, separation of materials or difficult ammonia applications
SITRANS LG260 Ideal for measuring level in medium range solids applications including; grains, plastics, and cement
SITRANS LG270 offers configuration options for extreme conditions including high temperature and high pressure applications such as: harsh applications found in chemical, HPI and energy industries for example, LPG gas tanks, steam boilers and distillation columns

Характеристика

SITRANS LG240, ambient temperature/process temperature curve

SITRANS LG250, ambient temperature/process temperature curves

SITRANS LG260, maximum tensile load curves

SITRANS LG260, ambient temperature/process temperature curves

SITRANS LG270, ambient temperature/process temperature curves

SITRANS LG270, process pressure/process temperature curve

Конфигурация

SITRANS LG Series installation

SITRANS LG Remote Interface installation

Чертеж

SITRANS LG series, dimensions in mm (inch)

SITRANS LG240, dimensions in mm (inch)

SITRANS LG250, dimensions in mm (inch)

SITRANS LG260, dimensions in mm (inch)

SITRANS LG270, dimensions in mm (inch)

SITRANS LG USB Communicator, dimensions in mm (inch)

SITRANS LG remote interface, dimensions in mm (inch)

Особенности

High accuracy to +/- 2 mm
Advanced Diagnostics available for high degree of safety
Simple menu driven display offers ease of setup
Large range of options offers reliability in most continuous level measurement applications
Ease of maintenance through module design and field replaceable and adjustable probe options
Perfect solution for wide range of applications from storage to interface with options for extreme pressure and temperature conditions
Universally applicable in liquids, interface, slurries and solids
Highly immune to buildup using auto learn function
Ability to measure in loss of echo situations with probe end tracking
Suitable for API 2350
Convenient access using USB and remote interface accessories

Схема подключения

SITRANS LG series connections

LG series connections

Технические данные

Mode of operation
Measuring principle	Guided wave radar measurement
Measuring range	300 ... 75 000 mm (11.81 ... 2 952.75 inch)
Output
mA analog output with HART digital signal	4 ... 20 mA/HART (SIL optional)
Output range
Analog	Current: minimum 3.8 mA, maximum 20.5 mA
Startup current	≤ 10 mA for 5 ms after switching on, ≤ 3.6 mA
Diagnostic alarm	Failure signal current output (adjustable): last valid measured value, ≥ 21 mA, ≤ 3.6 mA
Digital communication	HART Version 7 x and multidrop compatible
Modbus	Modbus RTU, Modbus ASCII
PROFIBUS PA	PROFIBUS PA profile 3.02
FOUNDATION Fieldbus	FOUNDATION Fieldbus protocol Physical layer according to IEC 61158-2
Performance	Process reference conditions according to DIN EN 61298-1
Non-linearity
Coaxial
Single rod probes
Interface models	See manual for more details
Resolution and repeatability	Accuracy +/- 2 mm (0.08 inch)
Accuracy
Coaxial/rod/cable probes	+/- 2 mm (0.08 inch)
Interface models	+/- 5 mm (0.197 inch) Note: Typical deviation, Interface measurement. See manual for full explanation.
Electromagnetic compatibility (check if needed)
Measuring cycle time	< 500 ms
Step response time	≤ 3 s
Temperature Effects	The measurement error from the process conditions is in the specified pressure and temperature range of below 1 %
Rated operating conditions
Ambient temperature for enclosure	-40 ... +80 °C (-40 ... +176 °F)
LCD readable temperature range	-40 ... +80 °C (-40 ... +176 °F) with display heated option
Location	Indoor/outdoor
Installation category	II
Pollution degree	2
Relative Humidity	20 ... 85 %
Medium conditions
Dielectric constant	dK ≥ 1.4 (configuration dependent)
	Note: for measurement below 1.4 use probe end tracking.
Process temperature range	-196 ... +450 °C (-321 ... +842 °F)
Vessel pressure	-1 … +400 bar (-100 … +40 000 kPa)
Design
Instrument weight (dependent on process fitting) - see manual for further details	Approx. 0.8 ... 8 kg (0.176 ... 17.64 lb)
Materials
Enclosure
	Plastic housing plastic PBT (Polyester)
	Aluminum die-casting housing, aluminum die-casting AISi10 mg, powder-coated- basis: polyester Stainless steel housing, precision casting 316L Stainless steel housing, electropolished 316L
Degree of protection
	Type 4/NEMA 4, IP65 Plastic housing IP66/IP67 Aluminum and stainless steelhousings are IP 66/68
Cable inlet	2x M20 x 1.5 or 2 x ½" NPT
Process connections
Pipe thread, cylindrical (ISO 228 T1)	G¾" A, G1" A, G1½" A according to DIN 3852-A
American pipe thread, conical (ASME B1.20.1)	¾" NPT, 1" NPT, 1½" NPT
Flanged	DIN from DN 25, ANSI from 1"
Hygienic	Hygienic fittings
Programming
Local	Four button, menu-driven data entry
Handheld communicator	Hart communicator
PC	SIMATIC PDM, AMS, PACTware
Power
2-wire Hart version	9.6 ... 35 V DC
4-wire versions	9.6 … 48 V DC, 20 … 42 V AC, 50/60 Hz, and 90 … 253 V AC, 50/60 Hz
Modbus	8 … 30 V DC
PROFIBUS PA	9 ... 32 V DC
FOUNDATION Fieldbus	9 ... 32 V DC
	Note: see manual for specific power based on ordered options
Certificates and approvals
Hazardous approvals:	ATEX, FM, CSA, IECex Note: other regional approvals are available
Hygienic approvals:	EHEDG, FDA
Overfill protection	WHG, Vlarem
Ship approval	ABS, CCS, GL, BV, LR

	SITRANS LG240	SITRANS LG250	SITRANS LG260	SITRANS LG270
Industries	Food, Beverage and Pharmaceutical	Chemical/HPI/Power/General	Cement, power generation, food, processing, mineral processing, mining	Chemical/HPI/Power/General
Applications	Hygienic and corrosive applications	Liquids, storage and process vessels with agitators, vaporous liquids, interface	Cement, fly ash, grain, coal, flour, plastics	Aggressive applications in liquids, storage and process vessels with agitators, vaporous liquids, high temperatures and pressures, low dielectric media
Range	32 m	75 m	60 m	60 m
Performance	± 2 mm	± 2 mm	± 2 mm	± 2 mm
Temperature	-40 … +150 °C (-40 ... +302 °F)	-40 … +200 °C (-40 ... +392 °F)	-40 … +200 °C (-40 ... +392 °F)	-196 … +450 °C (-320.8 ... +842 °F)
Communications	4 ... 20 mA/HART Modbus: Modbus RTU, Modbus ASCII PROFIBUS PA FOUNDATION Fieldbus SIMATIC PDM DTM/FDT for PACTware Fieldcare	4 ... 20 mA/HART Modbus: Modbus RTU, Modbus ASCII PROFIBUS PA FOUNDATION Fieldbus SIMATIC PDM DTM/FDT for PACTware Fieldcare	4 ... 20 mA/HART Modbus: Modbus RTU, Modbus ASCII PROFIBUS PA FOUNDATION Fieldbus SIMATIC PDM DTM/FDT for PACTware Fieldcare	4 ... 20 mA/HART Modbus: Modbus RTU, Modbus ASCII PROFIBUS PA FOUNDATION Fieldbus SIMATIC PDM DTM/FDT for PACTware Fieldcare

Полезное

ENG_469793.PDF