HP 3478A Technical Manual page 41

3478A 3478A
i. i. Connect the D Connect the DC Volts Standard C Volts Standard and Dig Voltmeter t
the AC-DC Current Calibrator as she in Figure 4-4. the AC-DC Current Calibrator as she in
j. j. Connect the Connect the AC-DC Calibrator AC-DC Calibrator to the
in in Figure 4-3. Figure 4-3.
k. k. Make sure the readin Make sure the reading on
exactly + IV. Readjust the DC Volts S exactly + IV. Readjust the DC Volts Standard necessary.
l. l. Check and recor Check and record the reading d the reading on the 3478A.
m. m. (Step #5.) (Step #5.) Set the AC-DC Ca Set the AC-DC Calibrator to the Ran
Check and record the 3478A's reading. Check and record the 3478A's reading.
n. n. Remove the Remove the DC DC Volts
Voltmeter from the AC-DC Current Calibrator Remove Voltmeter from the AC-DC Current Calibrator Remove
the current calibrator from the 3478A. completes the DC the current calibrator from the 3478A. completes the DC
Current Test. If any Current Test. If any test fails, calibrat test fails, calibrating the instrument
(go to (go to paragraph 4-90). paragraph 4-90).
manual's Section VII troubleshooting. manual's Section VII troubleshooting.
4-59. AC 4-59. AC Volts Volts Test Test
4-60. The AC Volts 4-60. The AC Volts Test limits are pr Test limits are printed on t
Test Card and in Table 4-5. Test Card and in Table 4-5. Each step on the card also
corresponds to a step in the procedure ' each step corresponds to a step in the procedure ' each step
number shown in parenthesis in the procedure. number shown in parenthesis in the procedure.
4-61. All test sig 4-61. All test signals are applied nals are applied to the 3478A'
INPUT Terminals. INPUT Terminals.
4-62. 4-62. Equipment Required. Equipment Required.
equipment for the AC Volts Test is the AC Calibrator (F equipment for the AC Volts Test is the AC Calibrator (F
Model Model 5200A, 5200A, 5215A 5215A Option Option 05).
4-63. 4-63. Test Test Procedure. Procedure.
Performance Tests have been completed before doing Performance Tests have been completed before doing
the AC Volts Test. the AC Volts Test. Also make sure the Also make sure the 3478A has been
Figure 4-4. DC Current Accuracy Figure 4-4. DC Current Accuracy Test and Calibration
and Dig Voltmeter to o
Figure 4-4.
to the 3478A 3478A shown shown
g on the Digital the Digital Voltmeter Voltmeter
tandard necessary.
on the 3478A.
librator to the Range.
Volts Standard Standard and and Digital Digital
ing the instrument
If If test test still fails, still fails, go go to to this
inted on the Volts he Volts
Each step on the card also
to the 3478A's HI LO s HI LO
The The required required test
05). 4-8 4-8
Make sure the DC Volts Make sure the DC Volts
3478A has been
Test and Calibration
warmed up for at least one hour, then do the following: warmed up for at least one hour, then do the following:
a. a. (Step #1.) (Step #1.) Reset the 3
Shift button and then the SGL/TRIG (TEST/RESET) Shift button and then the SGL/TRIG (TEST/RESET)
button. button.
b. b. (Step #2.) Set (Step #2.) Set the 3478A to the
c. c. Set the AC C Set the AC Calibrator for a .
Connect the output of the calibrator to the INPUT Connect the output of the calibrator to the INPUT
Terminals of the 3478A. Terminals of the 3478A.
ge.
d. d. (Step #3 (Step #3 and 4.)
Range. Range. Check the Check the 1/10 and
range by applying .03V at 20KHz and .3V at 20KHz, range by applying .03V at 20KHz and .3V at 20KHz,
this
test
4-8 4-8
TM 11-6625-3071-14 TM 11-6625-3071-14
Reset the 3478A by 478A by pressing the blue
the 3478A to the AC Volts Function.
alibrator for a .03V at 20KHz 03V at 20KHz output.
and 4.) Set the Set the 3478A to 3478A to the 300mV
1/10 and full scale full scale reading of
Table 4-5. AC Volts Table 4-5. AC Volts Test Limits Test Limits
pressing the blue
AC Volts Function.
output.
the 300mV
reading of the the