Operator`s manual

Figure 4-14. Generating AC voltage. Monitoring of the output in closed loop operation.
rrent Source
he h five ranges. It uses the 12-bit DAC to control
curr nent measurements as well as for system
ed
4.13.3 DC Cu
T SM2044 has a fully isolated uni-polar DC current source wit
ent level. This source function is useful for parametric compo
verification and calibration, where a precise DC current is necessary to calibrate current sensing components.
For improved resolution of the current source, use the Trim DAC. It has to be set separately, since it is not includ
in the calibration record, or the control software. Use
DMMSetTrimDAC() command with a parameter of 0 to 10
Further details are in Chapter 6.
0.
Whe figurations: 1) Four wire connection,
whe nected to the load, as in 4-wire Ohms
4.13.4 Source Current - Measure Voltage
n sourcing current and measuring voltage, there are two connection con
re the current sourcing terminals and the voltage sense terminals are con
measurement function; and 2) Two wire connection, where the current source terminals also serve as voltage sense
probes as in the 2-wire Ohms measurement configuration. The first method eliminates lead resistance errors. One
application is in semiconductor diode characterization discussed in Component Testing above. See Current Source
Output for range details. Voltage compliance is limited to 4 V in both configurations.
39 Signametrics