Masoneilan SVI II ESD, Installation And Maintenance Manual

Page: 80 / 220

© 2017 Baker Hughes, a GE company, LLC. All rights reserved.
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Powering Up the SVI II ESD
Verify the wiring and connections and then connect the current source.
NOTE
For hazardous location installation refer to the Masoneilan SVI II
ESD Quick Start Guide (GEA19520 or PN 055201359-999-0000).
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.
WARNING
This process can cause the valve to move. Before proceeding
ensure the valve is isolated from the process. Keep hands clear
from moving parts.
NOTE
When an SVI II ESD is turned on it is advisable to apply the air
supply before applying the electrical input signal.
Powering Up the ASD Configuration
The ASD, or Analog Safety Demand, configuration uses a 4 - 20 mA current source for power.
CAUTION
Use of a low impedance voltage source damages the SVI II ESD.
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.
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 must connect to the terminal board con,
and the same for -. See Figure 54 on page 83.
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