Calibration and Verification
Optional Tests
3
3-43
3. Repeat load regulation testing at the remaining Calibrator outputs shown in Table
3-47.
4. Set the Calibrator to standby and disconnect all equipment from the Calibrator.
3-33. DC Voltage Linearity Test
Use Table 3-35 for a test record. Proceed as follows to test the dc voltage linearity:
1. Self calibrate the Kelvin-Varley (KV) divider as called for in its service manual.
2. Connect the equipment as shown in Figure 3-18.
10V
732B
HI
NULL DETECTOR
LO
INPUT OUTPUT
HI
720A
HI
LO
GND GND
LO
OUTPUT SENSE
HI
CALIBRATOR (UUT)
HI
LO
GRD
GND
LO
GRD
HI
LO
GRD
*NOTE:
IF THE NULL DETECTOR IS NOT GROUNDED THROUGH
POWER LINE, CONNECT ITS GROUND TERMINAL
TO THE GROUND TERMINAL ONTHE 5700A.
GND*
F3-14.EPS
Figure 3-18. DC Voltage Linearity Test
3. Set the KV dials to zero by using the RANGE LOCK. Set the Calibrator to 0V on the
11V range operate. Note the null detector reading. Press OFFSET on the Calibrator.
4. Set KV dials to 0.999999X and Calibrator for a 10V output.
5. Use the Calibrator output adjustment to obtain a null detector reading equal to the
reading noted in step 3. Press SCALE on the Calibrator.
6. For each of the KV settings tabulated in Table 3-36, make the required Kelvin
Varley setting, and verify that the null detector reads within the limits shown.
3-34. DC Voltage Output Noise
(
10 Hz to 10 kHz
)
Test
Use Table 3-36 for a test record. Proceed as follows to test the dc voltage output noise
that falls in the range 10 Hz to 10 kHz:
1. Connect the equipment as shown in Figure 3-19.
