Quick Start Guide

Quick Start Guide

D103203X012

DVC2000 Digital Valve Controller

April 2014

If the process and ambient temperatures exceed the limits indicated by zone 2, then the DVC2000 high temperature mounting kit

can not be used. If temperatures exceed zone 2, you must use an extension bonnet or bracket mounted instrument.

Identify the yoke side to mount the DVC2000 digital valve controller based on the actuator fail mode. Refer to the GX

Control Valve and Actuator System instruction manual (D103175X012).

1. Isolate the control valve from the process line pressure and release pressure from both sides of the valve body. Shut

off all pressure lines to the actuator, releasing all pressure from the actuator. Use lock‐out procedures to be sure

that the above measures stay in effect while you work on the equipment.

2. Loosely attach the feedback pieces and magnet assembly to the valve stem connector. Do not tighten the fasteners

because fine adjustment is required.

CAUTION

Do not install a magnet array that is shorter than the physical travel of the actuator. Loss of control will result from the

magnet array moving outside the range of the index mark in the feedback slot of the DVC2000 housing.

3. Using the alignment template (supplied with the mounting kit), position the feedback array inside the retaining

slot.

4. Align the magnet array as follows:

D For air‐to‐open GX actuators vertically align the magnet array so that the center line of the alignment template is

lined up as close as possible with the upper

extreme of the valid travel range on the feedback array. See figure 10.

D For air‐to‐close GX actuators vertically align the magnet array so that the center line of the alignment template is

lined up as close as possible with the lower extreme of the valid travel range on the feedback array. See figure 11.

Figure 10. Air‐to‐Open Fisher GX Magnet Array

Alignment

W9218

ALIGNMENT TEMPLATE

LINE UP WITH

UPPER

EXTREME

OF VALID TRAVEL

RANGE

RETAINING

SLOT

Figure 11. Air‐to‐Close Fisher GX Magnet Array