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Coaxial Dynamics 81070 & 81080 Series Wattchman

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Features

 Protects Your Transmitter From High
   Reflected or Low Forward Conditions

 Continuous Display Of Forward
   and Reflected Power

 Audible and Visual Alarms

 Fast Fault Response (15ms)

 Remote Reset Provision

 110/220 VAC Input Switch

 Two Year Limited Warranty

Description


The Coaxial Dynamics Wattchman Monitor/Alarm measures forward and reflected RF power simultaneously in 50-Ohm coaxial cables and transmission lines. It is compatible with our entire series of 7/8" through 6-1/8" Line Sections and will accept plug-in elements that range from 5 watts to 100 kW full scale from 0.45 MHz to 2300 MHz.

One or both meters may incorporate a front panel adjustable set point which controls the trip point of the alarm. The 81070 Series has our standard 5/10/25 scales and the 81080 Series has 15/30/60 scales.

A Station Monitor/Alarm system installation consists of a Wattchman, a dual socket Line Section and two plug-in elements for monitoring both forward and reflected power. The Wattchman is supplied with two 25-foot DC cable assemblies for connection to the line section, and a 6 foot AC power cord. Installation requires inserting the line section into the transmission line, connecting the terminals of the transmitter interlock systems to the proper terminals on the Wattchman and providing AC power.

Abnormal load conditions quickly cause transmitter shutdown within less than 15 milliseconds (including control relay). An audible single tone alarm will indicate system/transmitter malfunction. Relay contacts are provided for remote alarm and reset switching. Fail-Safe or Non-Fail-Safe mode is selected by a switch located on the rear of the instrument.

Your confidence in the quality and dependability of the 81070/81080 Series Wattchman is assured with the Coaxial Dynamics Two Year Limited Warranty.


Available Models


Model 81070
The Original Transmitter Monitor/Alarm System with a forward power meter and a reflected power shutdown control monitor and meter for high reflected power. Model 81070 is designed for use with all Coaxial Dynamics dual socket Line Sections and standard Elements.

Model 81071
Model 81071 has a control monitor and meter for an alarm on low forward power levels (via contact on the rear panel) as well as the transmitter shutdown on high reflected power levels. Model 81071 is designed for use with all Coaxial Dynamics dual socket Line Sections and standard .

Model 81073
Model 81073 has only one monitor and control meter intended to provide an alarm on low forward power only. No indication of reflected power is provided. Start up switching circuits are provided to avoid alarm when the transmitter first starts up. Model 81073 is designed for use all Coaxial Dynamics single socket Line Sections and standard Elements.

Model 81074
Model 81074 has only one monitor and control meter and is intended to provide an alarm and transmitter shutdown with high power levels. There is only one indication of power provided. This unit is generally used to monitor and protect against high reflected power levels. However, it may also be used to monitor and protect against high forward power levels by simply rotating the detector element 180 degrees. Model 81074 is designed for use with all Coaxial Dynamics single socket Line Sections and standard Elements.

Model 81081
Model 81081 is similar to Model 81070 except that the standard 30 microamp meters have special 15/30/60 scales. Model 81081 is designed for use with all Coaxial Dynamics dual socket Line Sections (1-5/8" through 6-1/8") and special Elements.

Model 81082
Model 81082 is similar to Model 81071 except that the standard 30 microamp meters have special 15/30/60 scales. Model 81082 is designed for use with all Coaxial Dynamics dual socket Line Sections (1-5/8" through 6-1/8") and special Elements.


Available Options


Model 81070-200
Model 81070-200 is an amplified DC output option available for all Wattchman models. This option provides a pair of adjustable amplified DC outputs that are available on the terminal strip on the rear of the unit. The outputs are proportional to the meter indication and are calibrated at the factory so that a full scale deflection will cause a DC voltage of 2.00 volts to be present. The amplifiers are designed to work with any DC load impedance of 500 ohms or greater.


Specifications

Power Range

5 W to 100 kW

Frequency Range

0.45 MHz to 2300 MHz

Meter Specifications

30A full scale, 5%
1400 ohms terminal resistance
4-1/2 inch movement

Accuracy

5% when used with proper Coaxial Dynamics
line sections and elements

Response Time

Less than 15 milliseconds
(including control relay function)

Front Panel Controls

Push button reset
Trip set adjustments

Rear Panel Controls

Audible alarm switch
Fail-Safe mode switches
110/220 VAC input switch

Connections

Meter inputs
NO/NC control connections
Remote alarm turn on - Normally Opened
Remote reset connections
AC power receptacle

Contact Ratings

5A at 110 VAC non-inductive

Power Requirements

110/220 VAC, 50/60 Hz, 10 Watts maximum

Dimensions (H x W x D)

5.25 in. (13.3 cm) x 19 in. (48.3 cm) x 8 in. (20.3 cm)

Weight

9.0 lbs. (4.08 kg)

Finish

Textured Blue Polyurethane Enamel Front Panel
Alodine (Yellow Iridite)
Chassis

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Copyright 2017 Coaxial Dynamics (A CDI Industries, Inc. company).
All rights reserved. Last updated: Tuesday, January 10, 2017.
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