Keithley SourceMeter 3A 2420, Руководство по обслуживанию

Страница: 23 / 136

Performance Verification 1-9
Output voltage accuracy
Follow the steps below to verify that Model 2420 output voltage accuracy is within specified
limits. This test involves setting the output voltage to each full-range value and measuring the
voltages with a precision digital multimeter.
1. With the power off, connect the digital multimeter to the Model 2420 INPUT/OUTPUT
jacks, as shown in Figure 1-1.
2. Select the multimeter DC volts measuring function.
3. Set the voltage source protection to NONE. To do so, press CONFIG then SOURCE V
to access the CONFIGURE V-SOURCE menu. Select PROTECTION, and set the volt-
age source protection limit to NONE.
4. Press the Model 2420 SOURCE V key to source voltage, and make sure the source out-
put is turned on.
5. Verify output voltage accuracy for each of the voltages listed in Table 1-3. For each test
point:
• Select the correct source range.
• Set the Model 2420 output voltage to the indicated value.
• Verify that the multimeter reading is within the limits given in the table.
6. Repeat the procedure for negative output voltages with the same magnitudes as those
listed in Table 1-3.
7. Repeat the entire procedure using the rear panel INPUT/OUTPUT jacks. Be sure to
select the rear panel jacks with the front panel TERMINALS key.
Model 2420
Digital Multimeter
Input HI
Input LO
2420 3A SourceMeter
250V
PEAK
5V
PEAK
HI
LO
OUTPUT
75V
PEAK
75V
PEAK
EDIT
TOGGLE
POWER
RANGE
INPUT/
OUTPUT
4- WIRE
SENSE
DISPLAY
ON/OFF
TERMINALS
FRONT/
REAR
AUTO
RANGE

EXIT ENTER CONFIG MENU
SWEEP TRIG REL LOCAL FILTER LIMIT
DIGITS SPEED
V
Ω
MEAS
I FCTN V I
SOURCE
2 3 0 1
6 7 8 9
4
+/-
5
STORE RECALL
EDIT
Figure 1-1
Connections for voltage
verification tests