Emerson Process Management ROSEMOUNT 5300 Manual do Utilizador descarregar pdf (Página 82)

100

101

Reference Manual

00809-0100-4530, Rev BA

July 2009

Rosemount 5300 Series

5-10

Alarm Mode

The Alarm mode specifies the analog output state when there is a failure or a

measurement error:

High: the output current is set to the High Alarm Limit.

Low: the output current is set to the Low Alarm Limit.

Freeze Current: the output current is set to the last valid value at the time

when the error occurs.

Default settings for alarm mode:

• Measurement errors: Output current=High.

• Measured value out of range: transmitter enters saturation mode (if

Limit Alarm is disabled).

Table 5-2. Analog Output:

Standard Alarm Values vs.

Saturation Values

Table 5-3. Analog Output:

NAMUR-Compliant Alarm

Values vs. Saturation Values

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

Low 3.9 mA 3.75 mA

High 20.8 mA 21.75 mA

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

Low 3.8 mA 3.6 mA

High 20.5 mA 22.5 mA

1 2 ... 77 78 79 80 81 82 83 84 85 86 87 ... 323 324

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