Model 544 Pressure Transmitter

Model 544 Pressure Transmitter

4-20 mA, 5" WC to 100 psi, Hazardous approvals

Viatran’s Model 544 is a low pressure gage transmitter designed for precise measurement in hazardous locations. External adjustments allow for field calibration and ranging to provide measurement flexibility.

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Features

High Accuracy

Many Options available

Resources

Download Data Sheet

Manual

Approvals & Certificates

The 544 features a special internal calibration signal that allows users to calibrate the transmitter without an external pressure source. The 544 provides a 4 to 20 mA output signal measuring pressures from 0 to 5" WC thru 0-100 PSIG. External zero, span, and calibration controls are hermetically sealed for protection against harsh environments. These controls are externally adjustable with Viatran’s unique magnetically coupled drive system.

Model 544 also has a signal conditioner that allows for 5:1 ranging of the transmitter’s standard pressure range (FSPR).
Designed to meet intrinsically safe standards, the 544 provides reliable and safe pressure measurement in harsh process applications.

Performance

Full Scale Pressure Ranges

0-5, 10, 20, 50, 100, 300, 750" W.C.G

0-15, 50, 100 PSIG

0-15 PSIV

Nonlinearity (Best Fit Straight Line)

≤±0.15% FSO

Hysteresis & Repeatability

≤±0.10% FSO

Full Scale Output (FSO)

16 mA at 70° F

Long Term Stability

≤±0.2% FSO per 6 months

Compensated Temperature Range

70°F to 170°F (21°C to 76°C)

Operating Temperature Range

5"WC to 50"WC 0° F to +170° F

100"WC to 100 PSI -40° F to +170° F

Storage Temperature Limits

5"WC to 50"WC 0° F to +170° F

100"WC to 100 PSI -40° F to +170° F

Temperature Effect on Zero

<± 1.0% FSO per 100° F

Temperature Effect on Span

<± 1.0% FSO per 100° F

Electrical

Supply Voltage

10 to 40 Vdc

Power Supply Regulation

±0.02% FSO per volt

Output Signal

4-20 mA at 70° F

Load Impedance

1500 Ohms maximum at 40 Vdc

Zero Adjustment

Elevation -100% of FSO

Suppression +50% of FSO

Span Adjustment

Rangeable down 5:1 from standard range

Calibration Signal

20% of FSPR, externally switched

Calibration Signal Accuracy

The exact signal to pressure correlation is provided with each unit

Circuit Protection

Varistor protected across the input leads for surges above 40V and currents to 250 Amps peak with a pulse width of 8x20 µ Sec.

Reverse polarity protected

Insulation Resistance

< 5 nS

RFI / EMI Suppression

<1.0% FSO from 0 to 15 MHz at 2V peak to peak direct contact

Electrical Connections

1/2" NPT Male, 3 Wires, 18 AWG, 36"

Connection Color Codes

Red + Power / Signal

Black - Power / Signal

Green Case Ground

Materials of Construction

Wetted Parts

316 Stainless steel

Housing

316 Stainless Steel with a Cadmium plated electrical connector

Weight

3.5 lbs. nominal

Identification

Laser etched onto body

Mechanical

Pressure Connection

1/4" - 18 NPT female

Proof Pressure

500 PSI

Burst Pressure

1000 PSI

Shock Limitation

5 Gs

Fill Fluid

Silicone oil

Enclosure Classification

NEMA 4X

Mounting

May be supported by process piping or by optional mounting bracket

Options

PERFORMANCE OPTIONS

DK

Special shunt calibration setting

DQ

Cleaning for oxygen service

EA

Special calibration run

GE

Buna-N “O”-Ring

JJ

Direct mount indicator w/ explosion proof housing

JS

Direct mount indicator

MD

FM label

NF

Fast response time

NH

Customer specified identification

PW

1/8 DIN digital indicator

ALTERNATE PRESSURE PORTS

YA

MS 33649-04

YH

1/8 NPT(M)

YI

1/8 NPT(F)

YK

1/4 NPT(M)

YN

3/8 NPT(F)

Note:

Application of some available options may affect standard performance. Consult your Viatran representative for details.

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DL Series - Dual-Line Analog Input Process Meter

Model 548 Pressure Transmitter

Mounting Brackets

Ruggedized Connectors and Cable Assemblies