Original and New Emerson Rosemount 3051s2CD Differential Pressure Transmitter 4-20mA Hart

1. Performance Specifications
Measurement Range:
Differential Pressure (DP): 0-0.5 inH2O to 0-4000 psi (0-1.24 kPa to 0-27.58 MPa)
Static Pressure: Up to 4000 psi (27.58 MPa) depending on flange rating.
Accuracy:
±0.05% of calibrated span for spans ≥ 3 inH2O (0.75 kPa)
±0.075% of calibrated span for spans < 3 inH2O (0.75 kPa)
Stability:±0.15% of URL (Upper Range Limit) per 12 months.
Temperature Effect:
Zero: ±0.25% of URL per 100°F (56°C)
Span: ±0.25% of span per 100°F (56°C)
Response Time:90 ms (adjustable from 1 to 150 ms via software).
2. Functional Specifications
Output Signal:4-20 mA DC with HART® 5/7/FSK protocol, BRAIN® protocol, or Foundation™ Fieldbus.
Power Supply:
10.5-55 V DC (HART/BRAIN)
9-32 V DC (Fieldbus)
Load Limit:1050 Ω at 24 V DC (HART/BRAIN).
Display:LCD with 4-6 digit display, configurable units (psi, bar, kPa, inH2O, etc.).
3. Environmental Specifications
Operating Temperature:
Electronics: -40°F to 185°F (-40°C to 85°C)
Sensor: -40°F to 248°F (-40°C to 120°C)
Storage Temperature:-60°F to 160°F (-51°C to 71°C).
Humidity:0-100% RH (non-condensing).
Vibration:0.2% URL/g, 2-200 Hz.
4. Mechanical Specifications
Materials:
Sensor Isolation Diaphragms: 316L SST, Hastelloy® C-276, Monel®
Process Connections: 316L SST, carbon steel with 316L SST trim.
Weight:9.5 lb (4.3 kg) with carbon steel flanges.
Mounting:2-inch pipe mount or direct flange installation.
5. Certifications & Compliance
Safety:ATEX, IECEx, FM, CSA, INMETRO, NEPSI, TIIS, TR CU.
EMC:EN 61326, IEC 61326.
Process Compatibility:CE, PED, CRN.
 

1. Safety Precautions
Before proceeding with the installation of the Rosemount 3051S2CD Pressure Transmitter, ensure compliance with the following safety guidelines:
Power Disconnection: Always de-energize the system and isolate power sources before installation or maintenance.
Personal Protective Equipment (PPE): Wear appropriate PPE, including safety glasses, gloves, and protective clothing.
Hazardous Environments: Verify that the installation environment complies with ATEX, IECEx, or other regional hazardous area certifications if applicable.
Pressure Relief: Depressurize the process line before connecting or disconnecting the transmitter.
Material Compatibility: Confirm that wetted materials (e.g., seals, diaphragms) are compatible with the process media.
2. Pre-Installation Preparation
2.1 Tools and Materials Required
Adjustable wrench or torque wrench
Pipe sealant (approved for process media)
Mounting hardware (brackets, bolts, etc.)
Electrical tools (wire strippers, crimping tools)
HART communicator or AMS Trex device (for configuration)
Manufacturer's datasheet and installation manual
2.2 Site Requirements
Ambient Temperature: Ensure ambient conditions are within the transmitter's operating range (-40°C to +85°C / -40°F to +185°F).
Vibration: Avoid locations with excessive vibration (>2g peak). Use isolation mounts if necessary.
Orientation: Mount the transmitter vertically or horizontally per process requirements. Ensure the diaphragm is oriented correctly to avoid media buildup.
Accessibility: Provide adequate space for maintenance, calibration, and wiring.
3. Mechanical Installation
3.1 Mounting the Transmitter
Process Connection:
Use a 1/2" NPT, G 1/2", or M20 x 1.5 process connection as specified.
Apply pipe sealant to the male threads (avoid contaminating the diaphragm).
Hand-tighten the transmitter into the mounting boss, then torque to 15-20 ft-lb (20-27 N·m).
Direct Mounting:
For direct installation on process lines, ensure the transmitter is supported by a rigid structure to minimize stress on the diaphragm.
Remote Mounting(Optional):
Use capillary seals or remote-mounted diaphragms for high-temperature or corrosive media.
Ensure capillary lines are free from kinks and routed to avoid temperature gradients.
3.2 Pressure Port Configuration
High/Low Pressure Ports: Identify the high-pressure (HP) and low-pressure (LP) ports for differential pressure (DP) applications. Label ports if necessary.
Isolation Valves: Install block-and-bleed valves to isolate the transmitter during maintenance.
4. Electrical Connections
4.1 Wiring Guidelines
Power Supply: Use a 12-42 V DC loop power supply. Ensure polarity is correct (positive to "+" terminal, negative to "-" terminal)
Cable Specifications:
Shielded twisted-pair cable (18-22 AWG) for analog signals.
Maximum cable length: 1,500 m (4,920 ft) for HART communication.
Grounding: Connect the transmitter case to a reliable earth ground using the designated grounding terminal.
4.2 Terminal Connections
Remove the transmitter cover by loosening the captive screw.
Connect wires to the terminal block as follows:
Terminal 1 (+): Positive power supply
Terminal 2 (-): Negative power supply/4-20 mA output
For HART communication, connect the HART device in parallel with the power supply.
4.3 Intrinsic Safety (IS) Installations
Use IS barriers or isolators certified for the hazardous area.
Verify entity parameters (Voc, Isc, Ca, La) match the transmitter's IS ratings.