Resistance Tests - Agilent Technologies 66319B User Manual

B - Performance, Calibration, and Configuration
d. The output current should be at the full scale rating with the CC annunciator on.
e. Divide the reading on the rms voltmeter by the current monitor resistance to obtain rms current. It
should not exceed the values listed in the performance test record card under CC Noise (RMS).

Resistance Tests

Resistance Programming (performance, calibration)
This test verifies the resistance programming. Note that the current readback accuracy must be verified
before you can perform this test.
a. Turn off the dc source. Connect an electronic load directly to the output terminals of output 1 as
shown in Figure B-1a. Connect an external DMM (3458) directly to the sense terminals of output 1.
Turn on the dc source and select output 1.
Note: If you do not connect the RC network to the output, you must set the unit to operate in
LLOCAL compensation mode (see chapter 3 under "Output Compensation").
b. Turn on the electronic load. Program the load to operate in constant current mode. Set the load
voltage to 15 V and the current to 0 A.
c. Program output 1 to 10 V and set the output resistance to zero ohms.
d. Record the voltage reading on the external DMM (V1) and the current reading displayed on the front
panel of the dc source (I1).
e. Set the load current to 2.8 A. Record the voltage reading on the external DMM (V2) and the current
reading displayed on the front panel of the dc source (I2).
f. Calculate the Resistance value as follows:
This is the low output resistance, which should not exceed the limits in the performance test record
card for the appropriate model under Low Resistance.
g. Set the load current back to 0 A. Then set the output resistance of the dc source to 1 ohm.
h. Record the voltage reading on the external DMM (V3) and the current reading displayed on the front
panel of the dc source (I3).
i. Set the load current to 2.8 A. Record the voltage reading on the external DMM (V4) and the current
reading displayed on the front panel of the dc source (I4).
j. Calculate the Resistance value as follows:
This is the high output resistance, which should not exceed the limits in the performance test record
card for the appropriate model under High Resistance.
150
V2 − V1
I2 − I1
= Rlow
V4 − V3
= Rhigh
I4 − I3