Emerson 4500 manual Detailed Setup, Failure Mode Alarm and Saturation

Reference Manual

00809-0100-4027, Rev AA December 2005

Rosemount 4500

LCD Display Configuration

Fast Keys

1, 3, 7

The Meter Options command customizes the LCD display. The LCD display display will alternate between the items selected. Configure the meter to display the following information to suit your application needs:

•Engineering Units

•Percent of Range

•Scaled Variable

•Temperature

AMS

Right click on the device and select “Configuration Properties” from the menu.

1.In the “Device” tab, locate the “LCD Display Configuration” area. Select the desired options to suit your application needs, click Apply.

2.An “Apply Parameter Modification” screen appears, enter desired information and click OK.

3.After carefully reading the warning provided, select OK.

DETAILED SETUP

Failure Mode Alarm and Saturation

4500 transmitters automatically and continuously perform self-diagnostic routines. If the self-diagnostic routines detect a failure, the transmitter drives the output to configured alarm values. The transmitter will also drive the output to configured saturation values if the applied pressure goes outside the 4-20 mA range values.

The transmitter will drive its output low or high based on the position of the failure mode alarm switch, see “Set Switches” on page 2-5.

NOTE

The failure mode alarm direction can also be configured using the HART Communicator or AMS.

4500 transmitters have three configurable options for failure mode alarm and saturation levels:

•Rosemount (Standard), see Table 3-1

•NAMUR, see Table 3-2

•Custom, see Table 3-3

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