Bird Technologies 8329-300 User Manual

Page 28

Preparation:

Material: Lint-free cleaning cloth

Mild detergent

To clean the unit follow the instructions below.

1. Gently remove loose dirt and grime

using a soft clean cloth dampened

with a mild warm solution of deter-

gent and water.

2. Check the condition of the RF coaxial

connector. If it needs cleaning, clean

the connector with a self-drying con-

tact cleaner that leaves no residue on

the inaccessible portions.

Preventive Maintenance

Measure dc

Resistance

Preparation:

Tools: Common hand tools

Multimeter with an accuracy of ±1% at 50

ohms.

Temperature of the load between 20°C to 25°C

(68°F to 77°F)

Accurate measurement of the dc resistance between the in-

ner and outer conductors of the RF input connector will pro-

vide a good check of the condition of the load resistor.

Checking the dc resistance is simply used to measure a

change in the condition of the resistor over time. The track-

ing of the dc resistance must start before the resistor is first

put into service. Perform the following steps and record the

value for future comparison. Check and record the resis-

tance of the load periodically according to use.

WARNING

Never attempt to disconnect the equipment from the

transmission line while RF power is being applied.

Leaking RF energy is a potential health hazard.

1. Turn off RF power and interlock cir-

cuitry before any electrical disconnec-

tions are made.

2. Disconnect the RF coaxial line.

Bird Model 8329-300 Tenuline Attenuator