Series-3100MP

Supported Applications

The Dwyer Mercoid® Series 3100 is a microprocessor-based smart differential pressure transmitter optimized for draft measurement, flow, and level applications. The series features digital communication capabilities allowing configuration via push buttons or HART® Communication using a host, handheld communicator (HHT), or PC Configurator.

Documented application contexts include:

• Draft measurement
• Flow monitoring
• Level applications
• Hazardous locations requiring explosion-proof ratings for Class I, Div I, Groups A, B, C and D

The transmitter is compatible with gases, steam, liquids, or vapors.

Operating Conditions & Performance

The Series 3100 utilizes a capacitance sensor with software compensation for thermal effects. Key performance specifications include:

• Accuracy: ±0.075% FS (@ 20°C)
• Response Time: 0.12 seconds
• Burst Pressure: 10,000 psi
• Pressure Rating Range: -14.5 to 2000 psi
• Process Temperature: -40 to 248°F (-40 to 120°C)
• Ambient Operating Temperature (Without LCD): -40 to 185°F (-40 to 85°C); (With LCD module: -22 to 176°F / -30 to 80°C)
• Storage Temperature: -40 to 185°F (-40 to 85°C) without LCD; -22 to 176°F (-30 to 80°C) with LCD
• Humidity Rating (Manual): 5% – 98% RH at 104°F (40°C)

The enclosure is rated NEMA 4X (IP66) and explosion-proof. The transmitter supports a power supply of 11.9 to 45 VDC with an output signal of 4 to 20 mA / HART® Communication.

Measurement Ranges

The series offers multiple calibrated spans depending on the model configuration:

• 0 to 6 in w.c. (Calibrated Span: 0.6 to 30 in w.c.)
• 0 to 30 in w.c.
• 0 to 150 in w.c. (Calibrated Span: 1.5 to 150 in w.c.)
• 0 to 750 in w.c. (Calibrated Span: 7.5 to 750 in w.c.)
• 0 to 100 psi (Calibrated Span: 1 to 100 psi)
• 0 to 300 psi (Calibrated Span: 3 to 300 psi)
• 0 to 1000 psi

The transmitter provides a rangeability of up to 100:1.

Configuration Options

The Series 3100 is configurable across several dimensions including display options, process connections, and approvals. The standard wetted material is 316L SS stainless steel.

Housing & Display Options

• Standard Housing: Metal enclosure (Series 3100MP)
• LCD Option: A 5-digit LCD display is available on specific models, indicated by the "-LCD" suffix in model numbers.
• Note: Ambient operating temperature limits differ between units with and without the LCD module.

Approvals & Certifications

• Fm Approved (FM)
• HART® Communication Foundation
• Ce 0344 / CE
• AteX approved
• Note: A 316 SS housing is available only with WP approval.

Electrical & Process Connections

• Standard Electrical Connection: Two 1/2" female NPT conduit, screw terminal block.
• Load Resistance: 0 to 1500 Ω (HART® Communication requires 250 to 500 Ω).
• Process Connection: Standard models feature a 1/4" female NPT connection. Flanged connections are available via accessories.

Calibration & Configuration Features

The transmitter supports configuration of Range, Zero/Span, Unit, Tag, Dampening Time (0 to 60 seconds), Transfer Function, and DA Trim without a field calibrator. Custom calibration is available upon consultation with the factory.

• Custom Units: Supports in w.c., ft in w.c., mm in w.c., in Hg, psig, g/cm², kg/cm², MPa, Pa, kPa, bar, mbar, Torr, Atm, and mm Hg.
• Engineering Units: Volumetric flow (US gal/s, US gpm, l/min, ft³/h, etc.), Mass flow (kg/hr, lb/day, metric ton/hr), and Volume units are programmable if engineering unit mode is selected.

Accessories & Mounting

• A-630: Stainless steel angle type bracket with SS bolts
• A-631: Stainless steel flat type bracket with SS bolts
• BBV-1F: Flanged 3-valve block manifold
• BBV-22F: Flanged 5-valve block manifold
• DevCom2000: HART® Communication Protocol Software
• NIST Calibration: Available as an option.

Key Product Differences

The Series 3100 includes the Series-3100MP and Series-3100D families. The primary distinction between these series is physical dimensions:

• Series 3100MP Dimensions: Height: 7-31/32 [202.50], Width: 4-13/32 [112.00], Depth: 3-25/64 [86.00].
• Series 3100D Dimensions: Height: 7-37/64 [192.50], Width: 4-13/32 [112.00], Depth: 3-25/64 [86.00].

Both series share identical measurement ranges, accuracy specifications (±0.075% FS), and approval ratings within the documented model charts.

LCD vs. Non-LCD Models

Variants are distinguished by the presence of an LCD display:

• Non-LCD Models (e.g., 3100MP-2-FM-1-1): Do not include a local digital readout.
• LCD Models (e.g., 3100MP-2-FM-1-1-LCD): Include a 5-digit display for viewing Unit, %, mA, or Engineering units. These models have reduced ambient operating temperature limits (-22 to 176°F / -30 to 80°C) compared to non-LCD versions.