General Information - 2

Output 1 Characteristic

The dc source’s main output (output 1) characteristic is shown in the following figure. The main output of the dc source may be adjusted to any value within the boundaries shown.

Output

Voltage

-1.2A

VSET

ISET

15V

1

 

 

 

 

 

ne

 

 

 

 

 

 

 

 

 

 

i

 

 

 

 

 

 

 

 

 

load

l

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

e

 

 

 

 

 

 

 

 

 

 

 

v

 

 

 

 

2

 

 

 

 

 

 

i

 

 

 

 

 

 

 

 

 

 

t

 

 

 

 

 

 

 

 

 

 

 

s

 

 

 

 

 

 

 

 

 

 

i

 

 

 

 

line

Peak Current

 

 

 

 

es

 

 

 

 

 

 

 

 

 

r

 

 

 

 

 

d

 

 

 

 

V

 

 

 

 

 

a

capability for up

 

 

 

 

 

 

 

 

lo

 

 

 

C

 

 

 

 

 

v

 

 

 

 

 

 

 

 

 

i

e

to 7 ms shown

 

 

 

 

 

 

 

s

 

 

 

 

 

 

 

 

 

i

t

 

 

 

 

 

 

 

 

s

 

 

 

by dotted lines

 

 

 

 

 

e

 

 

 

 

 

 

 

 

r

 

 

 

 

 

 

 

 

 

 

C

 

 

 

 

 

 

 

 

-

 

C

 

 

 

 

 

 

+

 

 

 

 

 

 

 

 

 

 

Output

 

 

 

 

 

 

 

 

 

 

 

-2.8A

0

 

 

 

 

 

 

3A

5A

 

Current

 

 

 

 

 

 

 

 

Figure 2-1. Dc Source Output 1 Characteristic

The dc source is capable of providing a constant dc output of 15 volts with up to 3 amperes of current. It is capable of sourcing peak currents of up to 5 amperes -- provided the peak current pulse does not exceed 7 milliseconds, and the average current requirement does not exceed 3 amperes. If the unit attempts to draw current for longer than seven milliseconds, the current limit amplifier will limit the current to a maximum of 3.0712 amps. The peak current capability is illustrated by the dotted line in Figure 2-1.

NOTE: To source up to 5 amperes of current for up to 7 milliseconds, the current limit must

be programmed for greater than 3 amperes (up to a maximum of 3.0712 A).

The dc source can operate in either constant voltage (CV) or constant current (CC) over the rated output voltage and current. Although the dc source can operate in either mode, it is designed as a constant voltage source. This means that the unit turns on in constant voltage mode with the output voltage rising to its Vset value. There is no command for constant current operation. The only way to turn the unit on in constant current mode is by placing a short across the output and then enabling or turning the output on.

Note that the dc source cannot be programmed to operate in a specific mode. After inital turn-on, the operating mode of the unit will be determined by the voltage setting, current setting, and the load resistance. In figure 2-1, operating point 1 is defined by the load line traversing the positive operating quadrant in the constant voltage region. Operating point 2 is defined by the load line traversing the positive operating quadrant in the constant current region.

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Agilent Technologies 66311B, 66309B, 66111A manual Dc Source Output 1 Characteristic
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66111A, 66309B, 66311B, D specifications

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