6b Setra Model 278 Data Sheet for RFQ.pdf

Setra’s Model 278 is the ideal solution for measuring barometric pressure for remote environmental applications. The 278 is designed using the SETRACERAM™ ceramic sensor, enabling it to meet stringent accuracy requirements over wide operating temperatures in remote applications.

The small footprint and removable terminal block on the 278 makes installation fast and easy. The 278 is ideal for solar powered applications because of its low power consumption and sleep mode feature. Under normal operation, this feature minimizes current draw when readings are not being taken.

Designed for remote sensing applications The Model 278 pressure transducer is designed to be used in remote applications that require low power consumption. Its sleep mode feature allows for instant startup and fast readings.

Improved performance with ceramic sensor The 278 utilizes a variable capacitance sensor that is made using ceramic material fused together with glass and gold to form the SETRACERAM™ pressure element. This stable material and design offers class leading thermal performance and low hysteresis, allowing it to be integrated into demanding installations. The ceramic sensor enables improved performance compared to other stainless steel sensors, enabling the 278 to give accurate measurements and better test results.

Flexibility in installation The Model 278 is designed with a compact footprint for quick installation.

The removable terminal block provides easy wiring. Its mounting holes are designed to fit industry standard grid systems to maximize the use of panel space while minimizing your time at the job site.

Model 278 Barometric Pressure Transducer

Features

• Long-term stability: 0.1 hPa/mB per year

• Sleep mode for instant startup

• Removable terminal strip module for easy wiring

• Footprint configured for easy drop-in replacement

• Calibration NIST traceable

• Wide operating voltage 9.5 to 28 VDC

• Meets CE conformance standards

• Ideal for automated weather stations

• Low power consumption

• Relied on for severe weather detection

Applications

• Automated Weather Stations (AWS)

• Data Buoys and Ships

• Agriculture Metrology System

• AWOS/ASOS Systems

• High Accuracy Barometric Pressure Measurement

800.257.3872 I www.setra.com©Setra Systems Inc. All rights reserved.

The Setra Systems name and logo are registered trademarks of Setra Systems Inc.

Model 278 I Barometric Pressure Transducer

Specifications Performance data

Pressure range hPa/mb 500 to 1100 600 to 1100 800 to 1100

Temperature at: Accuracy (hpa/mb)1

20oC (+68oF) ±0.6 ±0.5 ±0.3

0 to 40oC (+23o to +104oF) ±1.2 ±1.0 ±0.6

20 to 50oC (-4o to +122oF) ±2.0 ±1.5 ±1

-40 to 60oC (-40o to +140oF) ±2.5 ±2.0 ±1.5

Non-linearity ±0.5 ±0.4 ±0.25

Hysteresis ±0.06 ±0.05 ±0.03

Non-repeatability ±0.04 ±0.03 ±0.02

Resolution 0.01 mB

Long term stability 0.1 mB/yr

Warm-up downshift <1 Sec. from shut-mode (warm-up <0.1 mb Max.)

Response time <100 mSec

Proof pressure 1500 hPa

Burst pressure 2000 hPa

Environmental data

Operating temperature4 °F(°C) -40 to +140 (-40 to +60)

Storage temperature °F(°C) -76 to +248 (-60 to +120)

Pressure media Non condensing air or gas.

Approvals CE, RoHS

Electrical data Circuit 3 or 4-Wire

Output 2 0–2.5 VDC

0–5 VDC

Excitation3 9.5 to 28 VDC

Output impedance <10 ohms

Output noise <50 Microvolts

Current consumption 3mA Nominal (operating mode) 1uA (sleep mode)

Physical description Case Stainless steel and polyester

Pressure Fitting 1/8” (ID dia.) bardbed fitting

Electrical Connection 5-Pin terminal block

Dimensions 3.6” x 2.4” x 1.0”

Weight 4.8 ox (135g)

1The root sum squared (RSS) of end point non-linearity, hysteresis, non-repeatability, and calibration uncertainty.

2Internal regulation minimizes effect of excitation variation, with <0.02 mb output change of 9.5 VDC to 28 VDC range.

3Zero output saturates at about 20 mV.

© Setra Systems, Inc. All rights reserved. The Setra Systems name and logo are registered trademarks of Setra Systems, Inc. | www.setra.com | 800.257.3872

Model 278 I Barometric Pressure Transducer

Ordering information Example part number: 2781600MA1B2BT1 Model 278, Pressure Transducer 600 to 1100 hPa/ma, Absolute Pressure, 1/8” Barbed Fitting,0 to 5 VDC Output, 5–Pin Terminal Block.

2 8 A 1 B7 1 T 1

[1] [2] [3] [5] [6]

Model

2781 Model 278

[1] [6][3] [4]

Output/Exc.

2Y 0 to 2.5 VDC/9.5 to 28 VDC

2B 0 to 5 VDC/9.5 to 28 VDC

Electrical conn.

T1 5-pin terminal block

[5]

Pressure conn.

1B 1/8” push tube fitting

[4]

Pressure type

A Absolute

[2]

Pressure range

500M 500 to 1100 hPa/mb

600M 600 to 1100 hPa/mb

800M 800 to 1100 hPa/mb

© Setra Systems, Inc. All rights reserved. The Setra Systems name and logo are registered trademarks of Setra Systems, Inc. | www.setra.com | 800.257.3872

Dimensions

SS

P-

Re v.

D

/2

2.36 59.9

3.02 76.7

2X .290

2X .140

MOUNTING HOLES

FOR #6 OR #4 SCREW

CONNECTOR, 5 POSITION

BL 3.5 SCREW CLAMP

BARBED PRESSURE FITTING

1.00 25.4

2.36

3.56 90.3

2.36 59.9

3.02 76.7

2X .290

2X .140

MOUNTING HOLES

FOR #6 OR #4 SCREW

CONNECTOR, 5 POSITION

BL 3.5 SCREW CLAMP

BARBED PRESSURE FITTING

1.00 25.4

2.36

3.56 90.3

[59.9]

2.36 2X Ø.140

Mounting holes for #6 or #4 screw

Barbed pressure fitting

2X Ø.290

Connector, 5 position BL 3.5 screw clamp

[76.7] 3.02

[25.4] 1.00

[mm] in

[60] 2.36

[90.3] 3.56