Emerson 3051S Specifications download pdf (Page 62)

Reference Manual

00809-0100-4803, Rev DA

Section 3: Configuration

April 2013

Configuration

Alarm level verification

The transmitter alarm level should be verified before returning the transmitter to service if

alarm and saturation levels are changed.

This feature is also useful in testing the reaction of the control system to a transmitter in an

alarm state. To verify the transmitter alarm values, perform a loop test and set the transmitter

output to the alarm value (see Ta bl e 3 -4, Ta bl e 3 -5, and Tab le 3 -6 on page 35, and “Analog

Output Loop Test” on page 12).

Variable saturation behavior

The analog output of the 3051S MultiVariable may respond differently based on which

measurement goes outside the sensor limits. This response will also depend on the device

configuration. Ta ble 3 -7 lists the behaviors of the analog output under different conditions.

Table 3-7. Variable saturation behavior

3.6.3 Variable mapping

The Variable Mapping tab is used to define which process variable will be mapped to each HART

variable. The primary variable represents the 4 to 20 mA analog output signal while the 2nd,

3rd, and 4th variables are digital. To edit the variable assignments, select the appropriate

process variables from the drop-down menus and click Apply.

Primary Variable Action Analog Output Behavior

Flow or Energy Flow Differential Pressure goes

outside the sensor limits

Analog output goes to high or low saturation

Flow or Energy Flow Absolute Pressure or Gage

Pressure goes outside the

sensor limits

Analog output does not saturate

Flow or Energy Flow Process Temperature goes

outside the user defined

sensor limits

Temperature Mode is Normal:

Analog output goes into high or low alarm.

Temperature Mode is Backup:

The Process Temp will go into backup mode and

be fixed at the user defined value. Analog output

will not saturate or go into alarm.

DP Differential Pressure goes

outside the sensor limits

Analog output goes to high or low saturation

AP or GP Absolute Pressure or Gage

Pressure goes outside the

sensor limits

Analog output goes to high or low saturation

Process Temp Process Temperature goes

outside the user defined

sensor limits

Direct Process Variable Output:

Analog output goes to high or low saturation

Mass and Energy Flow:

Analog output goes to high or low alarm

Mass and Energy Flow Fast Keys 1, 4, 3, 4

Direct Process Var. Output Fast Keys 1, 4, 3, 4

1 2 ... 57 58 59 60 61 62 63 64 65 66 67 ... 187 188

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Emerson 3051S Specifications Page 62

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