Emerson 3051S Specifikace stáhnout pdf (Strana 142)

Reference Manual

00809-0200-4801, Rev CA

July 2010

Rosemount 3051S

B-12

Process Temperature RTD Interface

(3051SMV_ _1 or 3, 3051SF_1, 3, 5 or 7)

Minimum Span = 50 °F (28 °C)

Service

3051S, 3051SMV_P, and 3051SF_5, 6, 7, or D (Direct Process Variable Output):

Liquid, gas, and vapor applications

3051SMV_M and 3051SF_1, 2, 3, or 4 (Mass and Energy Flow Output):

Some fluid types are only supported by certain measurement types

4–20 mA/HART

Zero and Span Adjustment

Zero and span values can be set anywhere within the range.

Span must be greater than or equal to the minimum span.

Output

Two-wire 4–20 mA is 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 protocol.

Power Supply

External power supply required.

• 3051S and 3051SF_D: 10.5 to 42.4 Vdc with no load

• 3051S and 3051SF_D with Advanced HART Diagnostics Suite: 12 to 42.4 Vdc with no load

• 3051SMV and 3051SF_1-7: 12 to 42.4 Vdc with no load

Load Limitations

Maximum loop resistance is determined by the voltage level of the external power supply, as

described by:

Fluid Compatibility with Pressure and Temperature Compensation

• Available — Not available

Ordering

Code

Fluid Types

Measurement Type Liquids Saturated Steam Superheated Steam Gas and Natural Gas

1 DP / P/ T (Full Compensation) • • • •

2 DP / P • • • •

3 DP / T • • — —

4 DP only • • — —

3051S and 3051SF_D

Maximum Loop Resistance = 43.5 * (Power Supply Voltage – 10.5)

The HART communicator requires a minimum

loop resistance of 250



for communication.

Voltage (Vdc)

Load (Ohms)

Operating

Region

1387

1000

500

10.5 20 30

42.4

1 2 ... 137 138 139 140 141 142 143 144 145 146 147 ... 239 240

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