BIRD Wattcher 3126A, Инструкция

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Using Remote Reset & Auxiliary DC
Remote reset can be used to wire a reset switch in a convenient location. Actuating the switch
will reset the alarm condition after the error has been corrected.
The reset input can be jumpered to ground so that the alarm will clear automatically when the
reflected power drops below the set point.
Auxiliary dc, (9-16 Vdc @ 1A), can be used to power the Wattcher Unit.
Connection to these features is achieved through a four-terminal Screw-Clamp plug connector.
Meter Scales
Both the forward and reflected meter faces have triple-range scales. The full scale value shown
on the element cap determines the power scale to be read.
Alarm Condition
If the reflected power reading reaches the trip level, (for longer than 50ms) the buzzer will sound
if enabled, the alarm LED will flash, and the interlocks will be active. This condition will continue
until the condition has been corrected and the reset button is pushed.
Determining VSWR
The forward/reverse RF power ratio is readily calculated from the readings, and VSWRs may be
determined from the following figures. Following the vertical and horizontal grid, determine
intersection of forward and reverse power values. Slanted lines passing closest to this point indicate
VSWR.
Figure 8
Remote Reset
Auxiliary DC
Connector
Bird Models 3126A, 3127A, 3128A
Wattcher RF Monitor/Alarm
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