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Instruction Manual

ManualsBrandsEmerson ManualsValve InstrumentationEmerson Fisher FIELDVUEDVC6200 SIS Digital Valve Controller
51525354555657585960
Instruction Manual
D103557X012
Device Information, Diagnostics, and Alerts
January 2015
55
Demand Mode Tests
The following steps assume the use of single acting spring and diaphragm actuators or double‐acting spring assist
piston actuators.
Perform the following steps to confirm valve operation:
D Point‐to‐Point Mode (DVC6200 SIS powered with 4-20 mA current source)
If the DVC6200 SIS is in series with a solenoid valve,
1. Disconnect the power from the solenoid valve, but maintain the 20 mA current to the digital valve controller.
The valve should move to its “fail safe” position.
2. Maintain power to the solenoid valve and adjust the current to the digital valve controller from
20 mA to 4 mA. The valve should move to its “fail safe” position.
3. Remove power from the solenoid valve and adjust the current to the digital valve controller from 20 mA to
4 mA. The valve should go to its “fail safe” position.
If a solenoid is not used with a DVC6200 SIS,
1. Adjust the current to the digital valve controller from 20 mA to 4 mA. The valve should move to its “fail safe”
position.
Note
The above tests are applicable for single‐acting direct relay A and C. If single‐acting reverse relay B is used adjust the current from 4
mA (normal state) to 20 mA (trip state).
D Multi‐drop Mode (DVC6200 SIS is powered by a 24 VDC power source)
If the DVC6200 SIS is pneumatically in series with a solenoid valve, and shares a single power source,
1. Disconnect power to both devices. The valve should go to its “fail safe” position.
If the DVC6200 SIS is pneumatically in series with a solenoid valve, with independent power sources,
1. Connect a 24 VDC power supply to the solenoid valve and a second 24 VDC power supply to the DVC6200 SIS.
2. Disconnect the solenoid valve power supply, but maintain the power supply to the DVC6200 SIS. The valve
should go to its “fail safe” position quickly.
3. Maintain the power supply to the solenoid valve and disconnect the DVC6200 SIS power supply. The valve
should go to its “fail safe” position, although not as quickly as it does in the previous scenario.
If DVC6200 SIS is alone, without a solenoid valve,
1. Disconnect power to the digital valve controller. The valve should go to its “fail safe” position.
Note
The above tests are applicable for single‐acting direct relay A and C.