Pressure-151 Pressure-151

Mo

del 1

135F

Model 1135FPressure-to-CurrentConverter

• Guaranteed 0.2% accuracy

• External zero adjustment

• Range adjustable from 0–12 to 0–30 psig

• Plug-in circuit board

• Overpressure to 150 psig

• Dual-compartment housing

Pressure-152

Model 1135F Pressure-to-Current Converter

Mod

el 1135F

FEATURESThe Model 1135F Field-Mounted P/I Converter,

together with the Model 1133 rack-mounted version,bring unsurpassed performance and versatility tothe pressure-to-current converter market. Thisinstrument operates on the same variablecapacitance sensing technique that has made theRosemount pressure transmitter the most widelyaccepted electronic pressure transmitter in the worldtoday.

Designed for field installation, the Model 1135Fconverts incoming pneumatic signals into anelectronic 4–20 mA output signal. It is ideal forplants that are converting from pneumatic toelectronic control. It is also an excellent choice foruse in electronic plants that monitor local pneumaticcontrol loops in safety-related areas.

The dual-compartment housing design of theconverter permits the electronics and pressuresensor to be environmentally isolated from the fieldwiring terminals, thus increasing reliability. A singleplug-in amplifier board is readily accessible andeasily removed for replacement or troubleshooting.To meet hazardous location certifications, theelectronics compartment is designed with flamearresters located between the internal compartmentand the external ports leading to the outsideatmosphere.

The range of the Model 1135F is continuouslyadjustable from 0–12 to 0–30 psig (0–83 to 0–207kPa). The ordering information lists five factorycalibrated ranges, but the converter may be factorycalibrated to any custom range within its operatinglimits. Various material and certification options areavailable, including a direct-reading output signalmeter.

The Model 1135F pressure-to-current convertercombines proven design, superior performance, andmaintenance simplicity to make it the finest P/Iconverter on the market.

OPERATIONInstrument air is applied to an isolating

diaphragm on one side of the patented d-Cell™ sensor.An oil-fill fluid transmits the applied pressure to oneside of the sensing diaphragm in the center of thed-Cell sensor. In a like manner, an atmosphericreference pressure is transmitted to the other sideof the sensing diaphragm. The displacement of thesensing diaphragm, moving a maximum of 0.004 in.(0.10 mm), is proportional to the pressuredifferential across it. Fixed capacitor plates on bothsides of the sensing diaphragm continuously detectthe position of the sensing diaphragm. Thedifferential capacitance between the sensingdiaphragm and the capacitor plates is convertedelectronically to a 2-wire, 4–20 mA dc signal.

Capacitor Plates

Lead Wires

Sensing Diaphragm

Rigid Insulation

Oil Fill

IsolatingDiaphragm Welded Seals

FIGURE 1. Cross Section of the Rosemountd-Cell™ Sensor.

1151

–014

2A

© Rosemount Inc., 2983, 1986, 1994.May be protected by one or more of the following U.S. Pat. Nos.:3,793,885; 3,800,413. Other foreign patents issued and pending.

Rosemount Inc.

Pressure-153

Mo

del 1

135F

1/2–14 NPTConduit Connection Vent

ZeroAdjustment

Terminal SideCircuit Side

0.75 (19)Clearance forCover Removal

8.75 (222)with Optional Meter

6.0(152)

OptionalMeter

PneumaticConnection

1/4-18 NPTFemale

4.1(104)

Nameplate

PneumaticConnection 1.4

(36)

CertificationTag

MountingAdapter1/2–14 NPTto 7/16 UNC

NOTEDimensions are in inches (millimeters).

FIGURE 2. Dimensional Drawings for Model 1135.

4.5(114)

4.1(104)

1135

-041

5A,

0418

A,

0419

A

FIGURE 3. Optional Universal Mounting Bracket.

NOTEDimensions are in inches (millimeters).

PneumaticConnection

5.75(146)

4.1(104)

1.4(36)

1135

-041

6A,

0417

A4.5

(114)

3.95(100)

3.25(83) 1.5

(38)

0.5(13)

3.75(95)

2.81(71)

6.0(152)

4.0(102)

1.0 (25)

Pressure-154

Model 1135F Pressure-to-Current Converter

Mod

el 1135F

SPECIFICATIONS

Functional SpecificationsInputInstrument air, 0 to 12 psig (0 to 83 kPa) minimum,0 to 30 psig (0 to 207 kPa) maximum span.Output4–20 mA dc.Power SupplyExternal power supply required. Converter operateson 12 to 45 V dc with no load.Load LimitationsSee Figure 4.IndicationOptional 0–100% meter with 2.3 in. (58 mm) scale.Indication accuracy is ±2%.SpanContinuously adjustable between a minimum spanof 0 to 12 psig (0 to 83 kPa), and a maximum of 0 to30 psig (0 to 207 kPa).Zero SuppressionUp to 30% of calibrated span. Externally adjustable.Ambient Temperature LimitsOperating: –20 to 180 °F (–29 to 82 °C)Storage: –50 to 250 °F (–46 to 121 °C).Overpressure Limit150 psig (1.03 MPa) maximum.DampingTime constant fixed at approximately 100 ms.Humidity0 to 100% relative humidity.Turn-On TimeTwo seconds. No warm-up required.

Hazardous Locations CertificationsFactory Mutual (FM) Approvals:

Explosion proof for Class I, Division 1, GroupsB, C, and D. Dust-Ignition Proof for Class II,Division 1, Groups E, F, and G. Suitable foruse in Class III, Division 1, indoor and outdooruse. NEMA 4X.

Canadian Standards Association (CSA)Approvals:

Certified for Class I, Division 2, Groups A, B,C, and D; Class I, Division 1, Groups C and D;Class II, Division 1, Groups E, F, and G; ClassIII hazardous locations; CSA enclosure 4,factory sealed.

Intrinsic Safety Approvals:FM and CSA certifications optional for specificClasses, Divisions, and Groups whenconnected with approved barrier systems. SeeMAN 4458 for FM and CSA approved barriersand groups. CENELEC Intrinsic SafetyApproval by BASEEFA (EEx ia IIC T4) whenconnected with CENELEC EEx ia approvedbarrier systems, Vmax 28 V, Imax 120 mA.

Performance Specifications(Performance specifications are derived at zero based,maximum spans under ambient reference conditions.)

Accuracy±0.20% of calibrated span, includes combined effectsof linearity, hysteresis, and repeatability.Stability±0.20% of upper range limit for six months.Temperature EffectAt maximum span: 0 to 30 psig (0 to 207 kPa) thezero error is ±0.5% of span per 100 °F.Total effect including span and zero errors: ±1.0% ofspan per 100 °F.At minimum span: 0 to 12 psig (0 to 83 kPa) the zeroerror is ±1.25% of span per 100 °F and the totaleffect is ±1.75% of span per 100 °F.Overpressure EffectZero shift less than ±0.2% of upper range limit for150 psig (1.03 MPa).Power Supply EffectLess than 0.005% of calibrated span per volt.Vibration Effect±0.05% of upper range limit per g to 200 Hz in anyaxis.Mounting Position EffectZero shift of up to 1 inH20 (0.24 kPa) which can becalibrated out. Position has no effect on span setting.

Lo

ad (

Oh

ms)

OperatingRegion

16501500

1000

500

0

4–20 mA dc

12 20 30 40

Power Supply (V dc)Maximum Load = 50 3 (Supply Voltage – 12)

FIGURE 4. Load Limitations.

Rosemount Inc.

Pressure-155

Mo

del 1

135F

Physical SpecificationsIsolating Diaphragms316L SST.Sensor Fittings and Flame ArrestersBrass fittings with bronze arresters are standard.Stainless steel fittings and arresters are optional.MountingOptional universal mounting bracket for 2-in.(5.08-cm) pipe or wall mounting.EnclosureExplosion-proof, low copper aluminium housing.NEMA 4X rating. Buna-N O-rings.

PaintPolyurethane.Electrical ConnectionScrew terminals for signal lead termination.Integral test terminals compatible with miniaturebanana plugs. Conduit connection is 1/2–14 NPT.Pneumatic ConnectionStandard 1/4–18 NPT female connection.WeightConverter alone, 5 lb (2.27 kg); with mountingbracket, 6 lb (2.72 kg).

1135

-025

5E01

A

FIGURE 5. Wiring Connections.

PowerSupply

Signal loop may be groundedat any point or left ungrounded.

FIGURE 6. Electrical Block Diagram.

1135

-019

7B

Demodulator FeedbackControl Current

Oscillator

VoltageRegulator

CurrentControl

CurrentControlAmplifier

CurrentLimiter

Oscill.Control

AmplifierSignal

Test

Sensor

+

+

–

–

NOTEDashes outline reverse polarity protection.

Model 1135F Pressure-to-Current Converter

Pressure-156

Mod

el 1135F

CIRCUIT SIDE

Housing O-Ring

HousingCover

Optional Meter Cover

Amplifier Circuit Board(Replaceable)

PneumaticConnection

1135

-041

3A

FIGURE 7. Field-Mounted Pressure-to-Current Converter.

HousingCover

Mounting Adapter1/2–14 NPTto 7/16 UNC

Meter Zero Adjust

PneumaticConnection

1135

-041

4A

Terminal Screws

Cover Foam Spacer

Cover Bushing

TERMINAL SIDE

Housing O-Ring

FIGURE 8. Field P/I Optional Meter Assembly.

MeterCover

Rosemount Inc.

Pressure-157

Mo

del 1

135F

ORDERING INFORMATIONTABLE 1. Model 1135F Field Mounted Pneumatic-to-Current Converter

Model Product Description

1135F Field Mounted Pneumatic-to-Current Converter

Code Calibrated Pressure

123456

3 to 15 psig (21 to 103 kPa)3 to 27 psig (21 to 86 kPa)6 to 30 psig (41 to 207 kPa)20 to 100 kPa (2.9 to 14.5 psig)40 to 200 kPa (5.8 to 29 psig)0Special Range (consult factory)

Code Flame Arrester and Sensor Materials

BS

Bronze Flame Arresters with Brass FittingsStainless Steel Frame Arresters with Stainless Steel Fittings

Code Meter

12

None RequiredMeter with Linear Scale (0 to 100%)

Code Mounting

NBB1

None RequiredUniversal Mounting Bracket for 2-inch Pipe or Wall Mounting

Code Options

E5E6I5I6I1N1

Factory Mutual (FM) ApprovalsCanadian Standards Association (CSA) ApprovalsFactory Mutual (FM) Non-incendive and Intrinsic Safety Certification (both system and entity concepts)Canadian Standard Association (CSA) Intrinsic Safety Certification when Connected with Approved Barrier SystemsCENELEC Intrinsic Safety CertificationBASEEFA Type N Certification

Typical Model Number: 1135F 1 B 1 B1 E5

TaggingThe transmitter will be tagged, at no charge, inaccordance with customer requirements. All tags arestainless steel. The standard tag is wired to thetransmitter. Tag character height is 1/8 in. (0.318 cm).A permanently attached tag is available uponrequest.

CalibrationConverters are factory calibrated to the rangespecified by the customer. Calibration is performedat ambient temperature and pressure.

Rosemount and the Rosemount logotype are registered trademarksof Rosemount Inc.d-Cell is a trademark of Rosemount Inc.