Powering Up The Svi Ii Esd - GE Masoneilan SVI II ESD Installation And Maintenance Manual

Powering Up the SVI II ESD

Verify the wiring and connections and then connect the current source.
Connecting a Power Source
Depending upon the configuration of the SVI II ESD, powering up the unit consists of
connecting to the 4-20 mA current source or the 24 VDC power source.
Powering Up the ASD Configuration
The ASD, or Analog Safety Demand, configuration uses a 4 - 20 mA current source for power.
To power up the ASD configuration of the SVI II ESD:
1. Loosen the four (4) cover screws and remove the cover of the SVI II ESD.
2. Connect the +⁄- terminals of the current source to the 4 - 20 mA IN connector (on the
terminal board). The current source + must connect to the terminal board connector +,
and the same for -. See Figure 54 on page 81.
3. Reinstall the cover and display.
4. Adjust current to 20 mA.
On initial power up of a newly installed SVI II ESD, the PST controller starts up in SETUP
mode using the default factory-installed instrument parameters. Once calibrated and
configured and set to NORMAL, the PST controller cycles through the NORMAL cycle menu
and the following values appear:
PRES: Pressure - unit of measurement and value
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=GE Oil & Gas
For hazardous location installation refer to the Masoneilan SVI II
NOTE
ESD Quick Start Guide (GEA19520 or PN 055201359-999-0000).
This process can cause the valve to move. Before proceeding
WARNING
ensure the valve is isolated from the process. Keep hands clear
from moving parts.
When an SVI II ESD is turned on it is advisable to apply the air
NOTE
supply before applying the electrical input signal.
Use of a low impedance voltage source damages the SVI II ESD.
CAUTION
The current source must be a true high impedance current limiting
device. A proper current source explicitly enables adjustment of
the current in mA, not Volts.
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