Emerson Fisher FIELDVUE DVC6000, Инструкция по эксплуатации

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DVC6000 Digital Valve Controllers
September 2013 6-6
Example — 18AWG Unshielded Audio, Control
and Instrumentation Cable
Manufacturer’s specifications include:
Nom. Capacitance Conductor to Conductor @ 1 KHz: 26 pF/ft
Nom. Conductor DC Resistance @ 20 Deg. C: 5.96 Ohms/1000 ft
Max. Operating Voltage
−
UL 200 V RMS (PLTC, CMG),150 V RMS
(ITC)
Allowable Length with this cable = 18000pF /(26pF/ft) = 692 ft
Example — 18AWG Shielded Audio, Control and
Instrumentation Cable
Manufacturer’s specifications include:
Nom. Characteristic Impedance: 29 Ohms
Nom. Inductance: .15
μ
H/ft
Nom. Capacitance Conductor to Conductor @ 1 KHz: 51 pF/ft
Nom. Cap. Cond. to other Cond. & Shield @ 1 KHz 97 pF/ft
Allowable Length with this cable = 18000pF /(97pF/ft) = 185 ft
The AUX switch input passes less than 1 mA through
the switch contacts, and uses less than 5V, therefore,
neither the resistance nor the voltage rating of the
cable are critical. Ensure that switch contact corrosion
is prevented. It is generally advisable that the switch
have gold-plated or sealed contacts.
Field Communicator
1. Connect the Field Communicator to the LOOP
terminals on the digital valve controller.
2. Turn on the Field Communicator.
3. From the Online menu, select Service Tools,
Partial Stroke Test.
4. Select either Standard (10%) or Custom. With the
Custom Stroke Test, the stroke may be entered up to
30% with configurable stroking speed and pause time.
5. The currently configured Stroke, Stroking Speed,
and Pause Time is displayed. Choose “Yes” to run the
test using these values. Choose “No” to modify the
values. The default value for Stroke Speed is
0.25%/second.
6. The valve begins to move and the actual travel
reported by the digital valve controller is displayed on
the Field Communicator.
7. Once the valve has reached the endpoint, check
that the valve has reached the desired set point. The
valve should return to its original position.
For information on configuring the Partial Stroke Test,
see Partial Stroke Variables in the Detailed Setup
section.
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