Emerson ROC364 Manual de Instruções descarregar pdf (Página 16)

ROC364 Instruction Manual

6-12 Rev 5/00

6.5.2 Analog Output Channels

The Analog Output channel is used for current loop devices. Use the following procedure to check

current loop installations.

Equipment Required: Multimeter

Personal Computer running ROCLINK Software

Taking appropriate precautions, disconnect the field wiring going to the AO channel terminations.

Connect a multimeter between the B and C terminals of the channel and set the multimeter to

measure current in milliamps.

Using the ROCLINK software, put the AO point associated with the channel under test in Manual

mode (scanning disabled).

Set the output to the high EU value.

Verify a 20-milliamp reading on the multimeter.

Calibrate the analog output high EU value as needed by increasing or decreasing the “Adj D/A

100% Units”.

Set the output to the low EU value.

Verify a 4-milliamp reading on the multimeter.

Calibrate the analog output low EU value by increasing or decreasing the “Adj D/A 0% Units” as

needed.

10.

Enable scanning for the AO point, remove the test equipment, and reconnect the field device.

11.

If possible, verify the correct operation of the AO channel by setting the high and low EU values as

before (scanning disabled) and observing the field device.

6.5.3 Discrete Input Channels

Equipment Required: Jumper wire

Place a jumper across terminals B and C. The LED associated with the channel (located on top left of

I/O Card) should light and the status as read by the ROCLINK software should change to “1”. With no

jumper on terminals B and C, the LED should not be lit and the status should be “0”.

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Emerson ROC364 Manual de Instruções Página 16