Acv Test; Test Cards; Calibration Cycle; Test Failure - HP 3456A Operating And Service Manual

Performance Test
9330/100 or 9330A/lOO for the 100 ohm resistor and the
Guildline Model 9330/1K or 9330A/I K for the 1 K ohm
resistor. An accuracy of
critical requirement.
b. 10 K ohm and 1 00 K ohm standard resistors. The
recommended resistors
9330/10K or 9330A/1OK for the 10 K ohm resistor and
the Guildline Model 9330/100K or 9330A/l00K for the
1 00 K ohm resistor. An accuracy of ± .001"10 or better is
the critical requirement.
c. 1 M ohm standard resistor. The recommended
resistor is the Guildline Model 9330/1M resistor with a
± .002% or better accuracy as the critical requirement.
d. 10 M ohm standard resistor. The recommended
resistor is the Guildline Model 95206 with a
better accuracy as the critical requirement.
e. 1000 M ohm standard resistor. The recommended
resistor has the -hp- Part Number 03456-67902 with a
± 2% or better accuracy as the critical requirement.
4·10. ACV Tnt
4-1 1 . For the ACV Test an ac calibrator is required with
a frequency range of 20 Hz to 250 kHz and a voltage
range of 10 mV to 700 V. To minimize measurement
uncertainties, especially below 50 Hz, the recommended
ac calibrator should be calibrated. Additionally, any
errors indicated on the calibrator's calibration chart
should be adjusted out by adjusting its error measure­
ment control. For example, the calibration chart in­
dicates an output error of + . 1 % at 20 Hz. To output a
precise 1 V, adjust the error measurement control to
+ . 1 % .
4-12. I f a substitute calibrator is used which does not
output a 250 kHz voltage, use the procedure in Para­
graph 4-44 for the 250 kHz check. An -hp- Model 652A
Test Oscillator in conjunction with the substitute
calibrator is used to for the 250 kHz check. The ACV
Test equipment is:
a. AC Calibrator. The recommended ac calibrator is
the Fluke Model 5200A15215A Precision AC Calibra­
tion System. The critical requirements are:
I . Frequency Response: 20 Hz to 250 kHz.
2. Output Voltage: 10 mV to 700 V.
3. Accuracy: ± .05%
4-2
.000 5 % or better is the
±
are the Guildline Model
.01 % or
±
4. Stability: ± . I % for a 6 months period.
b. DC Voltage Standard. The same as for the DCV
Test.

4-13. TEST CARDS.

4-14. Performance Test Cards are provided at the end
of this section to be used to record the 3456A's perfor­
mance. It is recommended to remove the cards from the
manual and fill them out while doing the test, since the
test limits are printed on the cards. The cards can also be
used as a permanent record and may be reproduced
without a written permission from Hewleu-Packard.

4-15. CALIBRATION CYCLE.

4-16. A periodic performance verification is required
for the 3456A. This should be done as pan of an incom­
ing inspection test and at a 90 day interval, depending
on your environmental condition and accuracy require­
ments. The Performance Test can be performed for the
incoming inspection test, 90 day test, and after adjust­
ments.
4·17. TEST FAILURE.
If the 3456A fails any of the Performance
4-18.
Tests, perform the necessary adjustments as given
in this Manual's Section
test procedures themselves when and what adjust­
ment(s) should be performed when a certain test
if
fails. For example, the 3456A's
DCV
fails, do the Adjustment. This should be
done before continuing with the rest of the test
since an uncalibrated
DCV
other and Ohms failures.
be corrected by adjustments, refer the 3456A to a
service trained person.
4·19. INSTRUMENT SET·UP.
4-20. Instrument set-up is specified in each test pro­
cedure. Also note that instument set-up is also deter­
mined by other parameters, like pressing the RESET
button, This will automatically set the 3456A, for
ple, to the DCV function, Autorange, and 5 digit mode.
Because of this, it is important to follow the procedures
in the given order.
4-21 . Unless otherwise specified, the Performance Test
signals can be applied either to the FRONT or REAR in­
put terminals. Make sure the FRONT IREAR switch is
in the correct position before applying the signals.
Model 3456A
V.
It is also noted in the
10
V reading
1 0 V
will probably show
If
the failure cannot
exam­