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ATO / ATC
The positioner must be configured as Air-to-Open, ATO, or as Air-to-Close, ATC. This parameter
is toggled by the * button.
To determine if a direct acting positioner has to be considered ATO or ATC perform the
following test:
1. Apply actuator's rated pressure to the positioner supply. Do not exceed actuator pressure
rating listed in control valve specification sheet. Damage to the valve stem, shaft, or trim
can occur.
2. Disconnect electrical (4 to 20 mA) input signal from the positioner or set it to less than 3.6
mA.
3. Observe the control valve position. If the valve is closed the actuator is ATO. If the valve is
open it is ATC.
Pressure Units
Select display units for the optional actuator pressure sensor. The available choices are PSI,
BAR or KPA.
The choice applies to local LCD display, ValVue ESD software display, and to HART
communicator.
1. Press * to move from PSI to BAR to KPA.
2. Press + to continue to scroll through the config menu.
Changing Language
The local display language can be set to English, French, Spanish, Portuguese, Japanese,
Italian or German.
*
1. Press
2. After you have selected the appropriate language, press + to continue to scroll through
Config menu.
104 |
=GE Oil & Gas
This procedure can cause the valve to move. Before proceeding be
WARNING
sure the valve is isolated from the process. Keep hands clear from
moving parts.
The characteristic configured in the positioner is applied in
NOTE
addition to the plug characteristic built into the valve trim. Do not
configure a percentage characteristic if the valve has a
percentage plug.
to toggle from ENGLISH to other language selections
.
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Table of Contents
Troubleshooting
