Dresser Masoneilan SVI II AP, Инструкция по эксплуатации

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SVI II AP Instruction Manual
42
DRAFT 6/
8/10
Dresser Masoneilan
Operational Checkout
The operational checkout of the SVI II AP consists of:
1. Connecting the SVI II AP to a current source.
2. Powering up the SVI II AP.
3. Checking the pushbutton locks.
Connecting to the Current Source
Connect to a DC mA current source then check and configure with the local display and
pushbuttons, if so equipped. The following section describes configuration and calibration
with the optional local display and pushbuttons. If the SVI II AP is not equipped with local
display use ValVue Lite and a PC with a HART modem or a HART Handheld
Communicator.
NOTE
When an SVI II AP is turned on it is advisable to apply the air
supply before applying the electrical input signal.
Powering Up the SVI II AP
WARNING
This process can cause the valve to move. Before proceeding
be sure the valve is isolated from the process. Keep hands
clear from moving parts.
NOTE
When an SVI II AP is turned on it is advisable to apply the air
supply before applying the electrical input signal.
CAUTION
Use of a low impedance voltage source damages the SVI II
AP. The SVI II AP input must be a current controlled source.
The SVI II AP will not function normally if connected directly to
a voltage source. However, direct connection to a current
source of up to 30 V will not the damage the SVI II AP. A
proper current source explicitly enables adjustment of the
current in mA, not Volts.
To power up the SVI II AP:
1. Loosen the four (4) cover screws and remove the SVI II AP cover.
2. Connect the +⁄- terminals from the SVI II AP to the current source. C to + and
- to - (Figure 27 on page 41).