Bird Technologies 4412A - Manual (Page 12)

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Component Description
Features
To make measurements, the cylindrical shaped plug-in element is inserted into the
line section socket and rotated to either stop. A small catch in the lower left hand
corner of the casting face presses on the shoulder of the plug-in element and
keeps it in proper alignment. This assures a good contact with the DC pickup and
between the lower edge of the element and the seat of the line section body. On
diametrically opposite sides of the plug-in element body are the contacts that pro-
vide DC pickup for either direction. These contacts make connection with the
spring finger of the line section only when the plug-in element is in the precise for-
ward or reverse position: i.e., against the stop.
Optional Equipment
The equipment available is a Carrying Case, QC Connectors, and Elements. Consult
Bird Electronic Corporation for availability and pricing, or for special requirements.
Power Requirements
The Model 4410 & 4410A operates from one 9V alkaline battery. Approximate
battery life is 24 hours of continuous usage. The Model 4412A uses one 9V
nickel-metal hydride (NiMH) rechargeable battery or an AC converter. When the
AC power is applied, the wattmeter charges the battery and operates from an
external power supply. When AC power is removed, the wattmeter operates
from the battery.
Meter Mirrored, 2 scale
Meter Housing Cast aluminum
QC Connector Interchangeable input and output
Range Switch OFF, Battery Check, Various Ranges
RF Line Section Element Port Accepts 4410 series elements
Rubber Feet Permit vertical or horizontal position and
operation
Calibration Access Hole Adjustment potentiometer
Instrumentation Module Active sensing circuitry
Battery
4410 & 4410A
4412A
9V alkaline
9V NiMH rechargeable