LD291

HART Pressure Transmitter

The model LD291 - HART® Pressure Transmitter offers digital HART based communication simplifying calibration and providing remote diagnostics. Its microprocessor-based electronics allow for total interchangeability with SMAR capacitive sensor. It automatically corrects sensor characteristic changes caused by temperature fluctuations.

Some Characteristics:

Output	Two-wire, 4-20 mA with HART superimposed digital communication signal.
Power Supply	12-45 Vdc
Range	Capacitive: 0 a 25 MPa (3600 psi) Piezo Resistive: 0 a 70 MPa (10150 psi)
Rangeability	Accepts calibration from URL to URL/40
Accuracy	± 0.075% of calibatred span
Update Output Current	100ms
FMEDA	Analysis done by Exida
MTBF	239 years
SIL	Yes
Calibration	With reference and without reference.
Access Protection	Yes, by hardware.
Diagnostic	Yes, by LCD.
Indicator	Optional 41/2-digit numerical and 5-character alphanumerical LCD indicator.
Only Eletric Board	Only electronic board with math co-processor high-performance, interchangeable on all models.
Update for FOUNDATION fieldbus and PROFIBUS PA	With the simple exchange of the main electronic board can be easily converted to these digital protocols.
Ambient Temperature Limits	Ambient: - 40 a 85°C (-40 a 185 °F) Process: - 40 a 100°C (-40 a 212 °F) (Silicone Oil) - 0 a 85°C (32 a 185 °F) (Fluorolube Oil) -25 a 85 ºC (-13 a 185 º F) (Anéis de Vedaçao em Viton) Stocking: - 40 a 100°C (-40 a 212 °F) Display: - 10 a 60 ºC (14 a 140 º F) (In operation) - 20 a 80°C (-4 a 176 °F) - 40 a 85°C (-40 a 185 °F) (No damaged)
Ambient Humidity Limits	0 a 100% RH
Diaphragms Insulators and Process Connection	Aço Inox 316L ou Hastelloy C276 316L SST or Hastelloy C276 Diaphragm available Sanitary model also Monel 400 and Tantalum.
Housing	Injected low copper aluminum with polyester painting or 316 stainless steel housing. According to the NEMA 4X, IP66.
Hazardous Area Certification	Intrinsic Safe (FM, CSA, Nemko, Dekra/EXAM, Cepel and NEPSI), non-incendive (FM, CSA and Cepel), explosion proof (FM, Nemko and Cepel) and dust ignition proof (FM).
Weight	Less than 2.0 kg (4 lb)