12
Chapter 4
Operating Instructions
General
When the unit is installed and connected to a transmitter for remote monitoring, metering, or external alarms and
functions as your installation requires, operator attention is not required. The equipment will completely monitor a
transmitter’s operation. The only time operating personnel will be necessary is to reset the unit if it has not been
wired for automatic or remote reset. Refer to
"User Applications and Wiring" on page 27
for different
applications in which the Wattcher monitor can be used.
RF Power Measurement
RF power measurements are made by the insertion of the detector elements into the line section. The elements are
selected for the frequency range and power level used.
Forward and reflected power is indicated when the arrow on the element plate points in the direction of power
flow. The forward power flows from the transmitter to the load or antenna and the reflected power flows from the
load or antenna to the transmitter.
When the detecting element is placed in the line section, be sure it is fully seated and fully rotated to the stop for
the appropriate indicating position. Also be sure the element catch on the element socket face of the line section is
in place on the shoulder of the element. This will as sure good contact be tween the element and line section body.
Elements are selected for the power and frequency range required. Since the reflected power is generally much less
than the forward power, it may be beneficial to select an element of lower power value for the reflected side. This
will allow better reading resolution. Generally elements of a ten to one ratio are used.
