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Mains Power Connector Block
Transformer Connector
Blo
ck
2
TtO't6
Fig.3.5. Amplifier Terminal Blocks
For use with shakers other than Type 4801, the manufacturer's wiring
requirements must be followed
.
When so used the EXCITER INTERLOCK
switch must be in the "Bypass" position.
3.3.
NORMAL OPERATION
3.3.1. Set-up
After connecting the complete system and before applying power from
the mains, ensure that the POWER switch on the amplifier is at "Off" and
the AMPLIFIER GAIN is at
"Reset".
Set up the CURRENT LIMIT, and
HEAD CONSTANT controls to the levels given on the plate affixed to each
B & K Exciter Head. The HEAD CONSTANT control should then be
locked. The DISPLACEMENT LIMIT can be set up at twice the expected
test maximum but must not be greater than the Exciter's displacement
capability. The displacement limits of B
&
K Exciter Heads are also on the
above mentioned plate. Select the required OUTPUT IMPEDANCE. Operat-
ion in the "High" impedance mode keeps the generated force unchanged
when changes occur in the test object, and therefore is particularly useful
16
)
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