Troubleshooting Analog Outputs - Emerson FloBoss 107 Instruction Manual

Required
Equipment
Caution

7.4.4 Troubleshooting Analog Outputs

Required
Equipment
Caution
Issued Feb-07
Calibration source of 1 to 5 volts dc or 4-20 mA
Multimeter
PC running ROCLINK 800 software
Failure to exercise proper electrostatic discharge precautions, such
as wearing a grounded wrist strap may reset the processor or
damage electronic components, resulting in interrupted operations.
1. Remove the field device connected to the transmitter.
2. Set the multimeter to measure voltage and connect it across the +
and GND terminals.
3. Connect to ROCLINK 800.
Select Configure > I/O > AI Points.
4.
Select the correct analog input point number.
5.
Install a voltage source of 1 to 5 volts dc and verify the following
6.
readings:
When supplying 1 volt dc input, AI should indicate 1% EU.
When the reading goes outside the calibrated 0% and 100% A/D
counts, ROCLINK 800 indicates point fail and the input reads
and holds the last know good value or go to a user-defined value
as determined by the AI configuration.
When supplying 5 volts dc, AI should indicate 100% EU.
Remove the test equipment.
7.
Multimeter
PC running ROCLINK 800 software
Failure to exercise proper electrostatic discharge precautions, such
as wearing a grounded wrist strap may reset the processor or
damage electronic components, resulting in interrupted operations.
Ensure that the area is a safe operating environment.
Secure the loop and remove it from service.
1.
2. Determine whether the AO is used in a PID loop. If it is, remove the
PID loop from service and take it off scan.
3. Connect to ROCLINK 800.
4. Select Configure > I/O > AO Points.
5. Record the EU values shown on the Analog Output screen.
Remove the field wiring from the AO port of the IO terminal block.
6.
Troubleshooting
FloBoss 107 Instruction Manual
7-9