Varec 8200, Инструкция по установке и эксплуатации, Страница: 14 / 38

Installation
6 Installation and Operations Manual
2.4 Mounting on Alternate Gaugeheads
Typical Whessoe or Shand & Jurs (L & J) Gaugehead Mounting.
The following steps describe the typical tasks required for mounting the transmitter on a
Whessoe 2006, L & J 92020, 92006 (GPE), or alternate gaugehead. An adapter is required. Refer
to Chapter 4, Maintenance on page 21. The gaugehead is assumed to have been previously
installed on the tank. See Figure 2-2 on page 5 and perform the following steps.
1. Remove the access cover from the gaugehead.
2. Install the transmitter in place of the accessory access cover.
3. Make certain that the transmitter drive engages the gauge counter wheel.
4. Proceed with field wiring.
Note Please read the safety guidelines section before you begin.
2.5 Field Wiring
Warning! Do not apply power to the transmitter until all wiring connections have been
made and the cover of the transmitter has been replaced.
Warning! Do not apply power until the jumper settings have been checked and the
instrumentation current loop rechecked. Do not apply power in a hazardous environment
until the explosion proof case is closed.
Caution! Incorrect field wiring connections can damage the transmitter electronics and
cause system malfunctions. Note difference between user-furnished and on-board power.
Figure 2-3 on page 7 illustrates typical field wiring for a transmitter installation with an on-
board power supply.
Each transmitter has a two-conductor signal cable back to the control room. If AC power is
required, an additional three-conductor cable is wired to the 8200 COT, either 110 VAC or
220 – 240 VAC. Follow national and local codes for wiring of power and signal cables.