Differential Pressure Transducer Model 274

Differential Pressure Transducer Model 274

Low Range Differential Pressure, 1000 psi line Pressure

Viatran’s “74” Series differential pressure transducers/transmitters are extremely accurate and durable units, designed specifically for test applications. The variable capacitance sensing technology provides extremely high overpressure protection, and long range stability, as well as high accuracy of 0.15% BFSL.

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Features

High Accuracy

Many Options available

Resources

Download Data Sheet

Manual

The Model 274 Differential Pressure Transducer measures pressure ranges from 5" W.C. to 100 PSID and provides a 0-5 VDC signal. All wetted surfaces, including flanges and diaphragms, are constructed of 316 stainless steel with a sealing Viton® O-Ring for excellent corrosion resistance. A standard 1,000 PSI static line pressure and single side overpressure rating are featured with these transducers. For applications that require a higher static line pressure rating, 3,000 PSI is available with optional flanges.
Model 274 also features an internal calibration circuit for easy field set-up, a quick disconnect electrical connection and external zero and span controls. A special option called fast response enables the unit to accurately respond to changes in pressure in approximately one tenth of the standard time.These features make the Model 274 ideal for most industrial test and flow applications.

Performance

Full Scale Pressure Ranges

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

0-15, 50, 100 PSID

Nonlinearity (Best Fit Straight Line)

≤±0.15% FSO

Hysteresis

≤±0.08% FSO

Repeatability

≤ ±0.06% FSO

Full Scale Output (FSO)

5 Vdc at 70° F

Resolution

Infinite

Long Term Stability

≤±0.1% FSO per 6 months

Zero Shift w/Line Pressure (%FSO/1000 PSI)

5” WC to 100” WC : ≤ 4%

300” WC to 100 PSI: ≤ 6%

Span Shift w/Line Pressure (%FSO/1000 PSI)

5” WC to 100” WC : 0 to -6%

300” WC to 100 PSI : 0 to -4%

Zero Shift After 1000 PSI Overload

Single Side: ≤± 0.1% FSO

Alternate Sides: ≤±0.5% FSO

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

≤± 2.0% FSO per 100° F

Temperature Effect on Span

≤± 2.0% FSO per 100° F

Electrical

Supply Voltage

9 TO 30 Vdc

Power Supply Regulation

≤±0.0001% FSO per Volt change over the supply voltage range

Output Signal

0 to 5 Vdc

Output Loading

3000 Ohms minimum

Current Draw

3.8 mA

Zero Adjustment

± 10 % FSO min. / ±20% FSO max.

Span Adjustment

± 10% FSO min. / ±20% FSO max.

Calibration Signal

80% of the FSPR, by shorting pins E & F

Calibration Signal Accuracy

≤±0.1% of the stated value

Circuit Protection

Reverse polarity protected

Insulation Resistance

>1000 MegOhms to case ground at 50 Vdc and 70° F

Response Time

10% to 90% FS Faster response available with NF option.

Electrical Connection

Bendix PT02E-10-6P, mates PT06E-10-6S (SR)

Pin Outs

Pin A + Power

Pin B - Power

Pin C + Signal

Pin D - Signal

Pin E Calibrate

Pin F Calibrate

Materials of Construction

Wetted Parts

316 Stainless steel and Viton O-Ring

Housing

304 and 316 Stainless Steel with an Aluminum alloy, black zinc-cobalt plated electrical connector

Weight

3.5 lbs. (6.5 lbs. with optional flanges)

Identification

Laser etched onto body

Mechanical

Pressure Connection

1/4" - 18 NPT female

Static Pressure

1000 PSI maximum (3000 PSI - optional)

Proof Pressure

1000 PSI single sided (3000 PSI - optional)

Burst Pressure

1500 PSI (4500 PSI - Optional)

Diaphragm Displacement

0.002 cubic inches at FSPR

Pressure Cavity Volume

Standard Flanges: 0.4 cubic inches

Optional Process Flanges : 1.5 cubic inches

Fill Fluid

Dow DC200 Silicone oil

Mounting

May be supported by process piping or by optional mounting bracket

Options

ELECTRICAL CONNECTION

B ( )

Alternate electrical connector

PERFORMANCE OPTIONS

DG

Improved temperature compensation to ±1.0% FSO per 100°F

DH

Special ranging

DK

Special shunt calibration setting

DM

Modified full scale output

DQ

Cleaning for oxygen service

EA

Special calibration run

GE

Buna 'N' O-Rings

NB

Alternate process flanges for increased pressure rating

NF

Fast response time

NH

Customer specified identification

NM

Alternate output signal (3mV/V)

ALTERNATE PRESSURE PORTS

Y ( )

Alternate pressure ports

Note:

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

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