Closed-Loop Operation - Fluke 52120A-C User Manual

52120A
Operators Manual

Closed-Loop Operation

When better load regulation and phase-angle control is necessary, connect the Product in
a closed-loop configuration with a 6105A or 6100B. Through the feedback loop, the
6105A senses signal phase angle and amplitude to adjust the output and supply a more
accurate current signal.
To connect the feedback circuit, connect one end of the control cable to the Control Input
connector on the rear panel of the Product. Connect the other end of the cable to the
Current Amplifier Control Output connector on the rear panel of the 6105A or 6100B.
See Figure 2-7.
Remove all front-panel connections between the 6105A or 6100B and the Product. Turn
off and then turn on the 6105A or 6100B to initialize the analogue and control
connections between the instruments. The status indicators of the Product will show slave
mode operation. See Figure 2-3. The 6105A or 6100B will have three more current
ranges: 1 x Ext.2A, 1 x Ext.20A, and 1 x Ext.120A. The output terminals of the Product
are set through the 6105A or 6100B Front Panel Terminal Configuration screen. All the
keys but the STBY key are turned off on the Product.
2-14
Load
Figure 2-6. Two Amplifier Outputs Connected in Parallel
Fluke 52120A #1
HIGH CURRENT
OUTPUT
HI
LOW CURRENT
OUTPUT
180A PK
OPTION
7V PK
HI
POWER
MAX
OUTPUT
30A PK
(12V DC)
7V PK
MAX
LO LO
850V PK 850V PK
MAX MAX
Fluke 52120A #2
HIGH CURRENT
OUTPUT
HI
LOW CURRENT
OUTPUT
180A PK
OPTION
7V PK
HI
POWER
MAX
OUTPUT
30A PK
(12V DC)
7V PK
MAX
LO LO
850V PK 850V PK
MAX MAX
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