Vectronics SWR-584C User Manual download pdf (Page 5)

SWR-584C Instruction Manual HF/VHF/220MHz SWR Analyzer

2.0 Power Management

Read this section carefully -- supplying the wrong external voltage or failing to follow

battery installation procedures could result in permanent damage!

2.1 External Power Requirements: The MFJ-1312D AC adapter meets all technical

requirements for powering the analyzer and it is recommended. Any other external power

source must meet the following specifications:

• Current: 250 mA or greater

• Voltage Range: 11-16 VDC, well filtered (14 VDC ideal)

• Battery Charging: 13.8 VDC minimum required for battery charger operation

• Polarity: Negative ground only

• Connection: 2.1-mm (+) center pin, (-) chassis ground (see below)

2.1 mm

2.2 Internal Battery Power: Always install fresh cells with identical part numbers and

expiration dates. For non-rechargeable power, install premium Alkaline cells and remove weak

cells immediately to prevent leakage. For rechargeable power, NiCds work well but Ni-MH cells

have no charge memory, hold a charge longer, and offer greater storage capacity. Before

loading new cells, always check (or know) the charger operating status -- is it On or Off ?

Important Warning: You must disable the analyzer's charger circuit when using non-

rechargeable batteries, or destructive cell damage and chemical leakage may result.

2.3 Setting The Charger: Remove the analyzer's back cover (4 screws on each side of the

case). Find the upper left-hand corner of the main pc board and locate the 3-pin header J5

next to the power jack. A small black shorting plug is installed on the header.

Charger Off (non-rechargeable cells), install header on center and right pins as shown:

Charger On (rechargeable cells), install header on center and left pins as shown:

The charger provides a near-constant 20-mA/hr "trickle" rate any time external power is

applied. The Power switch need not be on for charging to take place. Charging depleted cells

may require 12 hours or more, so always allow enough time. Batteries will not over-charge.

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Vectronics SWR-584C User Manual Page 5