Introduction
2
Figure
1
Bird 4421 Meter Outline Drawing
1. Operating Push Buttons
2. LCD
3. ON/OFF Push Button
4. Handle
5. Central Button
6. Fuse Access Door
7. AC Line Module
8. Master ON/OFF Switch
9. GPIB connector
10. GPIB DIP switches
11. RS-232 connector
12. RS-232 DIP switches
13. Power Sensor Socket
* A shorter case was introduced in 2016,
4421 length dimension has changed for
models built in 2016 and later.
