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Agilent Technologies 1989–2002
Agilent 3070 / 79000 Site Preparation
7-5
Chapter 7: Site Preparation – Compressed Air and Vacuum Requirements: Vacuum Requirements
Connecting Vacuum to the Testhead
Agilent 3070 Series I and Series II testheads do not have
vacuum-switching solenoids (valves)
1
inside the
testhead, so external vacuum solenoids must be installed
near the testhead to control the vacuum. If vacuum
hoses need to be disconnected from the testhead in order
to service it, you can switch off the vacuum using the
external solenoids.
The 3070 Series 3 and 79000 testheads have vacuum
solenoids (valves) inside the testhead, so they usually do
not need external vacuum solenoids. In order to turn off
vacuum and remove the vacuum hoses before servicing
this testhead, you should install a vacuum cut-off valve
near the system.
on page 7-6 shows the four vacuum ports at
the back of the 307X Series I and II testhead and their
outlets near the modules.
on page 7-7 shows
the 317X Series I and II vacuum ports and outlets.
on page 7-8 shows the vacuum port
locations on 3X7X and 79000 Series 3 systems. The
vacuum manifolds shown are a part of the optional
vacuum system for 317X and 307X Series 3 systems.
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There is an exception: any one-module (327X) Series I, II or 3 or 79000 testhead always includes one internal vacuum solenoid valve. A
second internal vacuum solenoid valve is optional.
