Setra 31CS, 32CS Specifications

Model 31CS/32CS

Standard & Heavy Duty Intrinsically Safe CSA Rated Pressure Transducers

FEATURES

CSA Certied Intrinsically Safe for use in:
Class I, Division 1, Groups C & D
Class I, Zone 0 Ex ia IIB T4 Ga
Class I, Zone 0 AEx ia IIB T4 Ga

When Used in Conjunction with a Zener Safety Barrier

GENERAL PURPOSE/OEM

DESCRIPTION

For applications in hazardous areas that need intrinsically
safe pressure sensors with consistent high levels of
performance, reliability and stability. The 31CS/32CS Series
sputtered thin lm units oer an unbeatable price-to­performance ratio in a small package size. They feature all
stainless steel wetted parts, a broad selection of electrical
and pressure connections, and a wide choice of electrical
outputs ready for installation.

For heavy duty applications, the 32CS Series feature a thicker
diaphragm and a pressure resistor to withstand the rigors
of cavitation or extreme pressure spikes, delivering years or
reliable and stable performance in pulsating applications.
For ATEX & IECEx intrinsically safe pressure transducers,
refer to Setra’s 31IS/32IS.

PRINCIPLE OF OPERATION

Sputtered Thin Film Strain Gauge Pressure Sensors
Using the well proven Wheatstone Bridge principle,
molecular layers are sputtered onto a 17-4 PH stainless steel
diaphragm and the circuit is etched to provide excellent
resistor denition and uniformity. Sputtered thin lm
technology allows the design of simple, highly accurate
and compact strain gauges deposited onto the back of
the sensing diaphragm, which is in direct contact with the
media. This method virtually eliminates drift, while oering
enhanced sensitivity.

Low Cost for High Volume OEM Installations
Thin Film Tech. Assures Long-Term Stability
No Oil Fill Prevents Thermal Instability &

Leakage
Pressure Ranges from 75 PSI up to 32,000 PSI
Long-Term Stability Better Than ±0.1% FS/Yr

0.25% Full Scale Accuracy
Small Footprint -Less than 1 inch Diameter
Reverse Wiring Protected
Accuracy Specied Over Full Temperature

Range
All Welded Stainless Steel Construction
No Internal Elastomers, no RTV’s or Epoxies
CE, RoHS Compliant

APPLICATIONS

Industrial Processes
Chemical
HVAC/R Equipment
Water Management
Intrinsically Safe Control Panels
Other Hazardous Areas

PRESSURE CAPABILITY

Application pressure should be
restricted to the rated-range of
the transducer. The maximum
overpressure is the pressure limit
at which the transducer will not
show signicant oset shift. The
minimum burst pressure is the
test-rating for uid containment.

The data in the tables is “times
rate ranges” (xRR).

©2013 Setra Systems, Inc. All rights reserved. The Setra Systems name and logo are registered trademarks of Setra Systems, Inc. Phone: [phone] • Fax: [phone] • www.setra.com

Pressure Range

PSI (BAR)

100-300 (7-20) 3.00 x FS

500-1,500 (40-100)

2,000-6,000 (140-400) 10 x FS

10,000 (700)

15,000 (1,000) 2.50 x FS

25,000 (1,800)

30,000 (2,200) —

Proof Pressure

(x Full Scale)

31CS 32CS 31CS 32CS

3.00 x FS

2.00 x FS

1.40 x FS

1.70 x FS

Burst Pressure

(x Full Scale)

40 x FS

20 x FS

>60,000 PSI

(4,000 Bar)

Model 31CS/32CS

Standard & Heavy Duty Intrinsically Safe CSA Rated Pressure Transducers

SPECIFICATIONS

Performance Electrical Data

Accuracy1 RSS ±0.25% FS Voltage

Long Term Drift 0.2% FS/YR (non-cumulative) Output (3-Wire) OV min to 10V max.

Thermal Error

31CS ±1.5% max, ±1% typical/212ºF (100ºC)

32CS ±2% max Source & Sinks 2 mA

GENERAL PURPOSE/OEM

Compensated Range -4 to +176ºF (-20 to +80ºC) Current

Operating Temp -40 to +176ºF (-40 to +80ºC) Output (2-Wire) 4-20 mA

Zero Tolerance Max. 0.5% of Span Supply Voltage 8-24 Volts measured at the input to the transducer terminals

Span Tolerance Max. 0.5% of Span Max Loop Resistance (Supply Voltage - 8) x 50 ohms. See Graph Below

Fatigue Life Designed for more than 100M cycles Ratiometric Output

Physcial Description

Output 0.5 to 4.5V (Source & Sink 2 mA)

Pressure Port See Ordering Information Supply Voltage 5 VDC ±10% at 4.5 mA

Wetted Parts

2

17-4 PH Stainless Steel (Diaphgram)

EMC Specications

Electrical Connection See Ordering Information Emission Tests: EN61326-1:2006 and EN61326-2-3:2006

Enclosure IP67 (IP65 for Electrical Code A) EN55011:2007 Radiated Emissions 30-230MHz 30dB µV/M @10M

Vibration BSEN 60068-2-6 (FC) Sine (20G)

BSEN 60068-2-64 (FH) Random (14.1 Grms)

Immunity Tests: EN61326-1:2006 and EN61326-2-3:2006

Shock BSEN 60068-2-27 (Ea) (50G, 11ms) EN61000-4-2:2009 Electrostatic

Weight (Conguration dependant.) 1.8 to 5.3 oz (50-150 grams).

Zener Barrier & Entity Parameters

EN61000-4-3:2006 Radiated

Zener Barrier Parameters

Voltage Ui = 30VDC EN61000-4-4:2004 Fast Transients:

Current Li = 100mA

EN61000-4-6:2007 Conducted

Power Pi = 0.7W

Entity Parameters RL Load Limitations for Current Output Mode:

Signal Current In = 4 to 20mA

Eective Internal Capacitance Ci = 323n

Eective Internal Inductance Li = 9µh

Values to be added when supplied with integrated cable:

Cable Capacitance Ci = 300pF / m (max) Wire-to-Wire

or Wire-to-Shield

Cable Capacitance Li = 2µH / m (max) Wire-to-Wire

1

RSS of Non-Linearity, Hysteresis, and Non-Repeatability.

2

Note: Hydrogen not recommended for use with 17-4 PH Stainless Steel.

3

Reverse Wiring Protected

3

Supply Voltage 1 Volt above full scale with min supply of 8V;

max 30V at 4.5mA

3

230-1000MHz 37dB µV/M @10M

±4Kv contact

Discharge:

±8Kv air

10V/M 80-1000MHz

Immunity:

3V/M 1400-2000MHz
1V/M 2000-2700MHz

±0.25, 0.5, 1Kv

3V 0.15 to 80MHz 80% 1KHz

Immunity:

1200

1100

1000

900

800

700

600

500

400

300

200

CUSTOMER LOAD RESISTOR (OHMS)

100

0

8

9 10 11 12 13 14 15 16 17 18

Min Resistor (RL) = 50 * (Vdd-24): for Vdd>24V
Max Resistor (RL) = 50 * (Vdd-8): for Vdd>8V

MAXIMUM RESISTOR (RL)

CUSTOMER SUPPLY VOLTAGE (V)

modulation

MINIMUM RESISTOR (RL)

19 20 21 22 23 24 25 26 27 28 29 30

Specications subject to change without notice.

Phone: [phone] • Fax: [phone] • www.setra.com ©2013 Setra Systems, Inc. All rights reserved. The Setra Systems name and logo are registered trademarks of Setra Systems, Inc.