110µv
110µv
110µv
134µv
120µV
120µV
110µV
134µV

TM 11-6625-2958-14&P

Figure 5-7.Current Sampling Resistor Connections

NOTE

When using the HP current sampling resistor recommended for this instru- ment, an external fan must be employed to cool the resistor. This precaution will maintain the sampling resistance at a constant value.

may be obtained from the factory.

5-43 Rated Output and Meter Accuracy.

a.Connect test setup shown in Figure 5-8.

b.Turn VOLTAGE controls fully clockwise.

c.Turn on supply and adjust CURRENT con- trols until front panel ammeter indicates maximum rated output current.

d.Differential voltmeter should read 0.5 ±

0.01Vdc.

5-44 Load Regulation.

Definition: The change IOUT in the static value of the dc output current resulting from a change in load resistance from short circuit to a value which yields maximum rated output voltage.

5-45 To check the constant current load regulation, proceed as follows:

a.Connect test setup shown in Figure 5-8.

b.Turn VOLTAGE controls fully clockwise.

c.Adjust CURRENT controls until front panel meter reads exactly maximum rated out voltage.

d.Read and record voltage indicated on dif- ferential voltmeter.

e,

Short circuit load resistor (RL).

f.

Reading on differential voltmeter should

not vary from reading recorded in Step (d) by more than the following:

6259B

6260B

6261B

6268B

6269B

Figure 5-8.

Constant Current

Load Regulation

 

 

Test Setup

 

5-46 Line Regulation.

 

Definition:

The change

IOUT in the

static value of dc output current re-

sulting from a change in ac input volt-

age over the specified range from low

line (usually 207 volts) to high line

(usually 253 volts), or from high

line to

low

line.

 

5-47 To check the line regulation, proceed as fol- lows:

a.Utilize test setup shown in Figure 5-8.

b.Connect variable auto transformer between input power source and power supply power input.

c.Adjust auto transformer for 207Vac input.

d.Turn VOLTAGE controls fully clockwise.

e.Adjust CURRENT controls until front panel ammeter reads exactly maximum rated output current.

f.Read and record voltage indicated on dif- ferential voltmeter.

g.Adjust variable auto transformer for 253V

ac input.

h.Reading on differential voltmeter should not vary from reading recorded in Step (f) by more

than the following:

6259B, 6269B 6260B, 6261B 6268B

5-48 Ripple and Noise.

Definition: The residual ac current which is superimposed on the dc output current