9018-18076.pdf.pdf - 第59页
Keysight i3070 Series 5 In-Circuit Test System Site Preparation 7 Compressed Air and Vacuum Requirements Intr od uction 7-2 Compr essed Air Requir ements 7-3 Vacuum Requir ements 7-5 Compr essed Air and Vacuum Primer 7-7
6-26 Site Preparation
6 Power Requirements
7-2 Site Preparation
7 Compressed Air and Vacuum Requirements
Introduction
Both compressed (or pressurized) air and vacuum are used in the testhead. Compressed air is used
primarily to secure the test fixture to the testhead. Vacuum is used primarily to actuate the test fixture:
that is, to make contact between the board under test and the probes in the fixture. Compressed air
is sometimes also used for air-assisted, solenoid-actuated valves used to switch the vacuum, and for
air-actuated test fixtures.
The site preparation requirements for compressed air and vacuum are different depending on the type
of testhead you are preparing the site for. This chapter describes those requirements.
For more about compressed air and vacuum principles and terminology, see the short Compressed
Air and Vacuum Primer on page 7-7.