Rosemount 1151 Data sheet

Product Data Sheet

00813-0100-4360, Rev HA Catalog 2008 - 2009

Rosemount 1151

Rosemount 1151 Pressure Transmitter

• Proven field performance and reliability

• Commitment to continuous improvement

• Reference accuracy of 0.075%

• Two-year stability of 0.1%

• Rangeability of 50:1

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page Pressure-3

Product Certifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page Pressure-8

Dimensional Drawings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page Pressure-10

Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page Pressure-16

www.rosemount.com

Contents

Product Data Sheet

00813-0100-4360, Rev HA

Rosemount 1151

Catalog 2008 - 2009

Leading a tradition of excellence

With over five million transmitters installed worldwide, the Rosemount 1151 continues to offer industry leading value. Changing customer needs and new technologies have driven product improvements, while advanced manufacturing and testing processes have guaranteed product quality. Even today, the Rosemount 1151 is world-reowned for proven field reliability and longevity.

Proven field performance and reliability

For over 35 years, the 1151 has provided the process control industry with unsurpassed service and reliability in even the harshest of environments. The lasting customer preference results from a combination of advanced technology, and a tradition of field proven performance.

Commitment to continuous improvement

Through ongoing focus on continuous improvement, ±0.075% reference accuracy has been accomplished as a result of manufacturing and engineering enhancements. In addition, Smart electronics offer rangeability to 50:1, reducing the number of transmitters to specify, procure, and carry in inventory. A modular design allows interchangeable mechanical and electrical components, providing backward and forward compatibility.

Rosemount Pressure Solutions

Rosemount 3051S Series of Instrumentation

Scalable pressure, flow and level measurement solutions improve installation and maintenance practices.

Rosemount 3095 Mass Flow Transmitter

Accurately measures differential pressure, static pressure and process temperature to dynamically calculate fully compensated mass flow.

Rosemount 305, 306 and 304 Manifolds

Factory-assembled, calibrated and seal-tested transmitter-to-manifold assemblies reduce installation costs.

Rosemount 1199 Diaphragm Seals

Provides reliable, remote measurements of process pressure and protects the transmitter from hot, corrosive, or viscous fluids.

Orifice Plate Primary Element Systems: Rosemount 1495 and 1595 Orifice Plates, 1496 Flange Unions and 1497 Meter Sections

A comprehensive offering of orifice plates, flange unions and meter sections that are easy to specify and order. The 1595 Conditioning Orifice provides superior performance in tight fit applications.

Application flexibility

The 1151 offers a variety of configurations for differential, gage, absolute and liquid- level measurements including integrated solutions for pressure, level, and flow. High pressure models allow static line pressures up to 4500 psi (310 bar). Multiple wetted materials, as well as alternative fill fluids ensure process compatibility. Smart, analog and low-power electronics are available to meet specific application requirements.

Annubar® Flowmeter Series: Rosemount 3051SFA

ProBar

The state-of-the-art, fifth generation Rosemount 485 Annubar combined with the 3051S or 3095 MultiVariable transmitter creates an accurate, repeatable and dependable insertion-type flowmeter.

Compact Orifice Flowmeter Series: Rosemount 3051SFC, 3095MFC, and 405

Compact Orifice Flowmeters can be installed between existing flanges, up to a Class 600 (PN100) rating. In tight fit applications, a conditioning orifice plate version is available, requiring only two diameters of straight run upstream and two downstream.

ProPlate® Flowmeter Series: Rosemount 3051SFP ProPlate, 3095MFP Mass ProPlate, and 1195

These integral orifice flowmeters eliminate the inaccuracies that become more pronounced in small orifice line installations. The completely assembled, ready to install flowmeters reduce cost and simplify installation.

, 3095MFA Mass ProBar®, and 485

Pressure-2

Product Data Sheet

accuracy 0.02

URL

span

--------------

⎝⎠

⎛⎞

0.1– %ofcalibratedspan±=

0.2 0.05 x

URL

span

-------------

⎝⎠

⎛⎞

+ % of calibrated flow span±

00813-0100-4360, Rev HA Catalog 2008 - 2009

Rosemount 1151

Specifications

PERFORMANCE SPECIFICATIONS

(Zero-based calibrated ranges, reference conditions, silicone oil fill, 316 SST isolating diaphragms.)

Accuracy

Output Code S

Ranges 3 through 8, DP and GP transmitters; Ranges 4 through 7, HP transmitters

±0.075% of calibrated span for spans from 1:1 to 10:1 of URL. Between 10:1 and 50:1 of URL.

All other ranges and transmitters

±0.25% of calibrated span

Output Code S, square root mode

Output Codes E, G, L, and M

±0.2% of calibrated span for 1151DP Ranges 3 through 5. All other ranges and transmitters, ±0.25% of calibrated span.

Stability

Output Code S

±0.1% of URL for 2 years for DP and GP Ranges 3 through 8. (±0.25% for all other ranges and transmitters.)

Output Codes E and G

±0.2% of URL for six months for Ranges 3 through 5. (±0.25 for all other ranges.)

Output Codes L and M

±0.25% of URL for six months

Temperature Effect

Output Code S [–20 to 185 °F (–29 to 85 °C)]

For DP and GP transmitter Range 4 through 8; HP transmitter Range 4 through 7:

Zero Error = ±0.2% URL per 100 °F (56 °C) Total Error = ±(0.2% URL + 0.18% of calibrated span) per 100 °F; For Range 3, double the stated effects. For other ranges and transmitters follow analog temperature specifications (Output Code E).

Output Code E, G, L, and M

[–20 to 200 °F (–29 to 93 °C)] For Ranges 4 through 0

Zero Error = ±0.5% URL per 100 °F. Total Error = ±(0.5% URL + 0.5% of calibrated span) per 100 °F; double the effect for Range 3.

(1)

Static Pressure Effect – DP Transmitters

DP Transmitters

Zero Error

±0.25% of URL for 2,000 psi (13790 kPa) for Range 4 and 5 or ±0.5% for other ranges, correctable through rezeroing at line pressure.

Span Er ror

Correctable to ±0.25% of input reading per 1,000 psi (6895 kPa), or to ±0.5% for Range 3.

HP Transmitters

Zero Error

±2.0% of URL for 4,500 psi (31027 kPa), correctable through rezeroing at line pressure.

Span Er ror

Correctable to ±0.25% of input reading per 1,000 psi (6895 kPa).

Vibration Effect

0.05% of URL per g to 200 Hz in any axis

Power Supply Effect

Output Codes S, E, and G

Less than 0.005% of output span per volt

Output Codes L, M

Output shift of less than 0.05% of URL for a 1 V power supply shift

Load Effect

Output Codes S, E, and G

No load effect other than the change in power supplied to the transmitter.

Output Codes L, M

Less than 0.05% of URL effect for a change in load from 100k⍀ to infinite ohms.

Short Circuit Condition (Low Power Only)

No damage to the transmitter will result when the output is shorted to common or to power supply positive (limit 12 V).

EMI/RFI Effect

Output shift of less than 0.1% of span when tested to SAMA PMC

33.1 from 20 to 1000 MHz and for field strengths up to 30 V/m.

(1) Accuracy for Range 9, GP transmitter at 40:1 is ±0.7%

of calibrated span.

Pressure-3

Rosemount 1151

max

min

max

Operating

Region

Product Data Sheet

00813-0100-4360, Rev HA

Catalog 2008 - 2009

Mounting Position Effect

Zero shift of up to 1 inH2O (0.25 kPa).

With liquid level diaphragm in vertical plane, zero shift of up to 1

O (0.25 kPa). With liquid level diaphragm in horizontal plane,

inH

zero shift of up to 5 inH extended units. All zero shifts can be calibrated out. No effect on span.

O (1.25 kPa) plus extension length on

FUNCTIONAL SPECIFICATIONS

Service

Liquid, gas, and vapor applications

Ranges

See Table 2 for ranges. Minimum span equals the upper range limit (URL) divided by rangedown. Rangedown varies with the output code See Table 1.

Outputs

Code S, Smart

4–20 mA dc, user selectable for linear or square root output. Digital process variable superimposed on 4–20 mA signal, available to any host that conforms to the HART

Code E, Analog

4–20 mA dc, linear with process pressure

Code G, Analog

10–50 mA dc, linear with process pressure

Code L, Low Power

0.8 to 3.2 V dc, linear with process pressure

Code M, Low Power

1 to 5 V dc, linear with process pressure

Current Consumption Under Normal Operating Conditions (Low Power Only)

Output Code L

1.5 mA dc

Output Code M

2.0 mA dc

protocol.

Span and Zero

Output Code S

Span and zero may be accessed with local adjustments or remotely through a HART-compatible Interface.

Output Codes E, G, L, and M

Span and zero are continuously adjustable.

Power Supply

External power supply required. Transmitter operates according to the following requirements:

Output Codes S, E

12 to 45 V dc with no load

Output Code G

30 to 85 V dc with no load

Output Code L

5 to 12 V dc

Output Code M

8 to 14 V dc

Where:

Code V

(1)

(2)

E G308501100 R L 5 12 Low Power Minimum Load M814

(1) A minimum of 250 ohms is required for communication.

(2) For CSA approvals V

minVmaxRminRmaxRL

12 45 0 1650 RL = 43.5 (VS – 12) 12 45 0 1650 RL = 50 (VS – 12)

= 42.4 V dc.

max

at Supply Voltage (VS)

= 20 (VS – 30)

Impedance: 100 k⍀

Zero Elevation and Suppression

Output Codes S, E, and G

Zero elevation and suppression must be such that the lower range value is greater than or equal to the (–URL) and the upper range value is less than or equal to the (+URL). The calibrated span must be greater than or equal to the minimum span and less than or equal to the maximum span.

Output Code L

Zero is adjustable ±10% of URL and span is adjustable from 90 to 100% of URL.

Output Code M

Zero is adjustable ±50% of URL and span is adjustable from 50 to 100% of URL.

Pressure-4

Temperature Limits

Electronics Operating

Code S: –40 to 185 °F (–40 to 85 °C)

Code E: –40 to 200 °F (–40 to 93 °C)

Code G, L, M: –20 to 200 °F (–29 to 93 °C)

Sensing Element Operating

Silicone fill: –40 to 220 °F (–40 to 104 °C)

Inert fill: 0 to 160 °F (–18 to 71 °C)

Storage

Code S: –60 to 185 °F (–51 to 85 °C)

Codes E, G, L, M: –60 to 250 °F (–51 to 121 °C)

Product Data Sheet

00813-0100-4360, Rev HA Catalog 2008 - 2009

TABLE 1. Rangeability

Output Code Minimum Span Maximum Span

S (DP and GP, SST, Range 3–8; HP SST, Range 4–7) URL/50 2 ⫻ URL S (All Others) URL/50 E, G URL/6 URL L URL/1.1 URL M URL/2 URL

(1) Transmitter is capable of measuring from –URL to URL.

(2) Accuracy specification for calibrated spans from 1:1 to 6:1 of URL only.

TABLE 2. Transmitter Range Availability by Model (URL = Upper Range Limit)

Range Code 1151 Ranges (URL) DP HP GP DP/GP/Seals AP LT

3 30 inH2O (7.46 kPa) • NA • NA NA NA 4 150 inH2O(37.3 kPa) • • • • • • 5 750 inH2O (186.4 kPa) • • • • • • 6 100 psi (689.5 kPa) • • • • • • 7 300 psi (2,068 kPa) • • • • • NA 8 1,000 psi (6,895 kPa) • NA • NA • NA 9 3,000 psi (20,684 kPa) NA NA • NA NA NA 0 6,000 psi (41,369 kPa) NA NA • NA NA NA

(2)

Rosemount 1151

(1)

2 ⫻ URL

(1)

TABLE 3. Upper Range Limits (URL)

Range Code bar mbar kg/cm

3 0.075 75 0.076 1.082 7.461 30 762 2.203 4 0.373 373 0.380 5.409 37.305 150 3810 11.013 5 1.865 1865 1.901 27.045 186.505 750 19050 55.065 6 6.90 6895 7.031 100 690 2773 70434 204 7 21 20685 21 300 2069 8319 211302 611 8 69 68950 70 1000 6895 27730 704340 2036 9 207 206850 211 3000 20685 83190 2113020 6108 0 413.686 413686 421.842 6000 41369 166378 4225992 12216.12

psi kPa inH2O @20 °C mmH2O @20 °C inHg @0 °C

TABLE 4. Output Code Availability

Code 1151 Output Options/Damping DP HP GP DP/GP/Seals AP LT

S 4–20 mA, Digital, Smart/Variable • • • • • • E 4–20 mA, Linear, Analog/Variable • • • • • • G 10–50 mA, Linear, Analog/Variable • • • • • • L 0.8 to 3.2 V, Linear, Low Power/Fixed • • • • • NA M 1 to 5 V, Linear, Low Power/Fixed • • • • • NA

TABLE 5. Fill Fluid Specifications

Fill Fluid Temperature Limits

D.C.® 200 Silicone –40 to 400 °F (–40 to 205 °C) 0.934 0.00060 (0.00108) 9.5 D.C. 704 Silicone 60 to 400 °F (15 to 204 °C) 1.07 0.00053 (0.00095) 44

Inert Fill –50 to 350 °F (–45 to 177 °C) 1.85 0.0004 (0.000864) 6.5 Syltherm®XLT, Silicone –100 to 300 °F (–73 to 149 °C) 0.85 0.000666 (0.001199) 1.6 Glycerin and Water Propylene Glycol and Water Neobee M-20

(1) Temperature limits are reduced in vacuum service. Contact an Emerson Process Management representative for assistance.

(2) Glycerin and Water and Propylene Glycol and Water are not suitable for vacuum service.

(3) Not compatible with Buna-N or Ethylene-Propylene O-ring material.

®(3)

(2)

0 to 200 °F (–17 to 93 °C) 1.13 0.00019 (0.00034) 12.5

(3)

0 to 200 °F (–17 to 93 °C) 1.02 0.00019 (0.00034) 2.85 0 to 400 °F (–17 to 205 °C) 0.900 0.00056 (0.001008) 9.8

(1)

Specific Gravity

Coeff. of Therm. Exp. cc/cc/°F (cc/cc/°C)

Viscosity at 25 °C centistokes

Pressure-5

Rosemount 1151

Product Data Sheet

00813-0100-4360, Rev HA

Catalog 2008 - 2009

Static Pressure and Overpressure Limits

115 1DP

0 psia to 2,000 psig (0 to 13.79 MPa) on either side without damage to transmitter. Operates within specifications from static line pressures of 0.5 psia (3.45 kPa) to 2,000 psig (13.79 MPa).

115 1HP

0 psia to 4,500 psig (0 to 31.02 MPa) on either side without damage to transmitter. Operates within specifications from 0.5 psia (3.45 kPa) to 4,500 psig (31.02 MPa). Consult an Emerson Process Management representative for higher Static Pressure options up to 6000 psi.

115 1AP

0 psia to 2,000 psia (0 to 13.79 MPa) without damage to transmitter. Operates within specifications from 0 psia to the upper range limit of the transmitter.

115 1GP

0 psia to 2,000 psig (0 to 13.79 MPa) for ranges to 1,000 psig (6.90 MPa), 4,500 psig (31.02 MPa) for the 3,000 psig (20.68 MPa) range, and 7,500 psig (51.71 MPa) for the 6,000 psig (41.37 MPa) range, without damage to the transmitter. Operates within specifications from 0.5 psia (3.45 kPa) to the upper range limit of the transmitter.

115 1LT

TABLE 6. Flange Pressure Rating

Standard Class/Rating Carbon Steel Stainless Steel

ANSI 150 285 psig ANSI 300 740 psig ANSI 600 1,480 psig DIN PN 10–40 40 bar DIN PN 10/16 16 bar DIN PN 25/40 40 bar

(1) At 100 °F (38 °C); the rating decreases with increasing

temperature.

(2) At 248 °F (120 °C); the rating decreases with increasing

temperature.

(1)

(2)

1,440 psig

275 psig 720 psig

40 bar 16 bar 40 bar

(1)

(2)

Burst Pressure All Models

10,000 psig (68.95 MPa) proof pressure on the flanges.

Transmitter Security (Output Code S)

Activating the transmitter security function prevents changes to the transmitter configuration, including local zero and span adjustments. Security is activated by an internal switch.

Overpressure Saturation Value (Output Code S)

If the sensor detects a negative overpressure value, the analog signal will be driven to 3.9 mA. If the sensor detects a positive overpressure value, the analog signal is driven to 20.8 mA.

Damping

Numbers given are for silicone fill fluid at room temperature. The minimum time constant is 0.2 seconds (0.4 seconds for Range 3). Inert-filled sensor values would be slightly higher.

Output Code S

Time constant is adjustable in 0.1 second increments from minimum to 16.0 seconds.

Output Codes E and G

Time constant continuously adjustable between minimum and

1.67 seconds.

Output Codes L, M

Damping is fixed at minimum time constant.

1151LT

Time constant continuously adjustable between 0.4 and 2.2 seconds with silicone oil fill, or 1.1 and 2.7 seconds with inert fill for flush models and electronics codes E or G.

Turn-on Time

Maximum of 2.0 seconds with minimum damping. Low power output is within 0.2% of steady state value within 200 ms after application of power.

Physical Specifications, Standard Configuration

Electrical Connections

/2–14 NPT conduit with screw terminals and integral test jacks compatible with miniature banana plugs (Pomona 2944, 3690, or equivalent). The HART Hand-Held Interface connections are fixed to the terminal block on smart transmitters.

Humidity Limits

0 to 100% relative humidity

Volumetric Displacement

Less than 0.01 in3 (0.16 cm3)

Failure Mode Alarm (Output Code S)

If self-diagnosis detects a gross transmitter failure, the analog signal will be driven below 3.9 mA or above 21 mA to alert the user. High or low alarm signal is user selectable.

Level 4–20 mA Saturation Value 4–20 mA Alarm Value

Low 3.9 mA 3.75 mA

High 20.8 mA 21.75 mA

Pressure-6

Wetted Materials

Isolating Diaphragms

316L SST, Hastelloy C-276, or Tantalum. See ordering table for availability per model type.

Drain/Vent Valves

316 SST or Hastelloy C-276, see ordering table for availability per model type.

Process Flanges and Adapters

Plated carbon steel, 316 SST or Hastelloy C-276, see ordering table for availability per model type.

Wetted O-rings

(other materials also available)

Viton

Product Data Sheet

00813-0100-4360, Rev HA Catalog 2008 - 2009

Rosemount 1151

Non-wetted Materials

Fill Fluid

Silicone oil or inert fill

Nuts and Bolts

Plated carbon steel

Blank flange (GP and AP only)

Plated carbon steel

Electronics Housing

Low-copper aluminum. NEMA 4X

Cover O-rings

Buna-N

Paint

Polyurethane

Process Connections

Rosemount 1151DP, HP, GP, AP

/4–18 NPT on 2.125-in. (54-mm) centers on flanges for

Ranges 3, 4, and 5.

/4–18 NPT on 2.188-in. (56-mm) centers on flanges for

Ranges 6 and 7.

/4–18 NPT on 2.250-in. (57-mm) centers on flanges for

Range 8.

/2–14 NPT on adapters.

For Ranges 3, 4, and 5, flange adapters can be rotated to give centers of 2.0 in. (51 mm), 2.125 in. (54 mm), or 2.250 in. (57 mm).

Rosemount 1151LT

High pressure side: 2-, 3-, or 4-in., Class 150, 300 or 600 flange; 50, 80, or 100 mm, PN 40 or 10/16 flange.

Low pressure side: 1/4–18 NPT on flange. 1/2–14 NPT on adapter.

Weight

12 lb (5.4 kg) for AP, DP, GP, and HP transmitters, excluding options. Meter option: Add 2 lb (1 kg)

TABLE 7. 1151LT Weight with Flange

(1)

Flange

2-in., Class 150 18 (8.2) N/A N/A N/A 3-in., Class 150 23 (10.4) 25 (11.3) 26 (11.8) 27 (12.3) 4-in., Class 150 29 (13.2) 32 (14.5) 34 (15.4) 36 (16.3) 2-in., Class 300 20 (9.1) N/A N/A N/A 3-in., Class 300 28 (12.7) 30 (13.6) 31 (14.1) 32 (14.5) 4-in., Class 300 38 (17.2) 41 (18.6) 43 (19.5) 45 (20.4) 2-in., Class 600 22 (10.0) N/A N/A N/A 3-in., Class 600 31 (14.1) 33 (15.0) 34 (15.4) 35 (15.9) DN 50, PN10-40 20 (9.1) N/A N/A N/A DN 80, PN 25/40 25 (11.3) 27 (12.3) 28 (12.7) 29 (13.2) DN 100, PN 10/16 25 (11.3) 28 (12.7) 30 (13.6) 32 (14.5) DN 100, PN 25/40 29 (13.2) 32 (14.5) 34 (15.4) 36 (16.3)

(1) Stainless steel flange weights are listed.

Flush lb. (kg)

2-in (50mm) Ext. lb. (kg)

4-in. (100mm) Ext. lb. (kg)

6-in. (150mm) Ext. lb. (kg)

Pressure-7

Rosemount 1151

Product Data Sheet

00813-0100-4360, Rev HA

Catalog 2008 - 2009

Product Certifications

Approved Manufacturing Locations

Rosemount Inc. — Chanhassen, Minnesota, USA

Emerson Process Management GmbH & Co. — Wessling, Germany

Emerson Process Management Asia Pacific Private Limited — Singapore

Beijing Rosemount Far East Instrument Co., Limited – Beijing, China

European Directive Information

The EC declaration of conformity for all applicable European directives for this product can be found on the Rosemount website at www.rosemount.com. A hard copy may be obtained by contacting our local sales office.

ATEX Directive (94/9/EC)

Emerson Process Management complies with the ATEX

Directive.

European Pressure Equipment Directive (PED) (97/23/EC)

1151GP9, 0; 1151HP4, 5, 6, 7, 8 Pressure Transmitters — QS Certificate of Assessment - EC No. PED-H-100 Module H Conformity Assessment

All other 1151 Pressure Transmitters — Sound Engineering Practice

Transmitter Attachments: Diaphragm Seal - Process Flange Manifold — Sound Engineering Practice

Electro Magnetic Compatibility (EMC) (2004/108/EC)

All models — EN 61326: 1997 with Amendments A1, A2, and A3

Hazardous Locations Certifications

North American Certifications

Ordinary Location Certification for Factory Mutual

As standard, the transmitter has been examined and tested to determine that the design meets basic electrical, mechanical, and fire protection requirements by FM, a nationally recognized testing laboratory (NRTL) as accredited by the Federal Occupational Safety and Health Administration (OSHA).

Factory Mutual (FM) Approvals

FM Explosion-Proof tag is standard. Appropriate tag will be substituted if optional certification is selected.

Explosion-Proof: Class I, Division 1, Groups B, C, and D. Dust-Ignition Proof: Class II, Division 1, Groups E, F, and G; Class III, Division 1. Indoor and outdoor use. NEMA 4X. Factory Sealed.

I5 Intrinsically safe for Class I, II, and III Division 1, Groups A,

B, C, D, E, F, and G hazardous locations in accordance with entity requirements and Control drawing 01151-0214 and 00268-0031. Non- incendive for Class I, Division 2, Groups A, B, C and D hazardous locations.

For entity parameters see control drawing 01151-0214.

Canadian Standards Association (CSA) Approvals

E6 Explosion-Proof for Class I, Division 1, Groups C and D;

Class II, Division 1, Groups E, F, and G; Class III, Division 1 Hazardous Locations. Suitable for Class I, Division 2, Groups A, B, C, and D; CSA enclosure type 4X. Factory Sealed.

I6 Intrinsically safe for Class I, Division 1, Groups A, B, C, and

D hazardous locations when connected per Drawing 01151-2575. For entity parameters see control drawing 01151-2575. Temperature Code T2D.

Pressure-8

European Certifications

I1 ATEX Intrinsically Safe and Combustible Dust

(1151 Smart only) Certificate No.: BAS99ATEX1294X ATEX Marking II 1 GD EEx ia IIC T5 (-60°C ≤ EEx ia IIC T4 (-60°C ≤

118 0

IP66

TABLE 8. IS Entity Parameters

Ui = 30 V Ii = 125 mA Pi = 1.0 W (T4) or 0.67 W (T5) Ci = 0.034 μF Li = 20 µH

Special Conditions for Safe Use (X)

The apparatus, is not capable of withstanding the 500V test as required by EN 50020: 1994. This must be taken into account when installing the apparatus.

Ta ≤ 40°C) Ta ≤ 80°C)

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