HP 3478A Technical Manual page 36

3478A 3478A
calibrated decade resistor with settings that range from calibrated decade resistor with settings that range from
30ohm to to 30Mohm 30ohm 30Mohm or or 10ohm
correction factors on the decade resistor's calibration correction factors on the decade resistor's calibration
chart must be algebraically added to the 3478A reading, chart must be algebraically added to the 3478A reading,
to to achieve achieve the the required required accuracy.
Resistors and critical requirements are as follows: Resistors and critical requirements are as
a. a. 10 ohm, 100 ohm, and 1K ohm Standard 10 ohm, 100 ohm, and 1K ohm Standard
Resistors. Resistors. Use the Guildline Model 9330A/10 or Use the Guildline Model 9330A/10 or
9330A/10 for the 30 ohm Range, Model 9330/100 or 9330A/10 for the 30 ohm Range, Model 9330/100 or
9330A/100 for the 300 ohm Range, and Model 9330/1K 9330A/100 for the 300 ohm Range, and Model 9330/1K
or 93 or 9330A/IK 30A/IK for th for the 3K e 3K ohm Range.
require requirement is + .000 ment is + .0005° 5° o or better. o or better.
b. b. 10K ohm and 100K ohm Standard Resistors. 10K ohm and 100K ohm Standard Resistors.
Use the Guildline Model 9330/10K or 9330A/O1K for the Use the Guildline Model 9330/10K or 9330A/O1K for the
30K ohm Range and Model 9330/100K or 9330A/100K 30K ohm Range and Model 9330/100K or 9330A/100K
for the 300 for the 300K ohm Range. K ohm Range. The accuracy req
.001o or better. .001o or better.
c c . . 1M 1M ohm ohm Standard Standard Resistor.
Model 9330/IM for the 3M ohm Range with i.002%o or Model 9330/IM for the 3M ohm Range with i.002%o or
better accuracy. better accuracy.
d. d. 10M 10M ohm Standard Resistor. ohm Standard Resistor. Use the Guildline
Model 9330/10OM for the 30M ohm Range with + .01% Model 9330/10OM for the 30M ohm Range with + .01%
or better accuracy. or better accuracy.
4-15. 4-15. DC Current DC Current Test And Test And Calibration
4-16. The DC Current 4-16. The DC Current Test and Calibration
AC-DC Current Calibrator as the current source, a Digital AC-DC Current Calibrator as the current source, a Digital
Voltmeter for the standard, and a DC Volts Standard for Voltmeter for the standard, and a DC Volts Standard for
a stable voltage source. a stable voltage source. The following lists t
equipment and recommended models. equipment and recommended models.
4-17. 4-17. AC-DC Current AC-DC Current Source.
2500 is the recommended 2500 is the recommended AC-DC Current
critical requirements are as follows: critical requirements are as follows:
a. a. Required current Required current is 100mA and is 100mA and IA.
b. b. Required accur Required accuracy is acy is + .03%.
4-18. 4-18. Digital Voltmeter. Digital Voltmeter.
Voltmeter is an -hp- Model 3456A. Voltmeter is an -h p- Model 3456A. Refer to paragraph 4-
8 for the critical requirements. 8 for the critical requirements.
4-19. DC 4-19. DC Volts Volts Standard. Standard. The DC Volts Standard is a
Systron Donner Model M107 Precision Voltage Source. Systron Donner Model M107 Precision Voltage Source.
Refer to Refer to paragraph 4-9 paragraph 4-9 for the critical for the critical requirements.
4-20. AC Current 4-20. AC Current Test and Test and Calibration
4-21. The AC Current 4-21. The AC Current Test and Calibra
AC-DC Current Calibrator as the current source and an AC-DC Current Calibrator as the current source and an
AC Calibrator as the ac standard AC Calibrator a s the ac standard. . The following lists the
required equipment and recommended models. required equipment and recommended models.
4-22. 4-22. AC-DC Current AC-DC Current Source.
2500 is the recommended 2500 is the recommended AC-DC Current
critical requirements are as follows: critical requirements are as follows:
10ohm to to 10Mohm. 10Mohm.
accuracy. The The Standard
follows:
ohm Range. The accuracy The accuracy
The accuracy requirement is + uirement is +
Resistor. Use the Guildline Use the Guildline
Use the Guildline
Calibration
Test and Calibration requires an requires an
The following lists the required he required
Source. The Valhalla Model The Valhalla Model
AC-DC Current Source. Source. The
IA.
+ .03%.
The recommended Digital The recommended Digital
Refer to paragraph 4-
The DC Volts Standard is a
requirements.
Calibration
Test and Calibration requires tion requires an
The following lists the
Source. The The Valhalla Valhalla Model
AC-DC Current Source. Source. The
a. a. Required current Required current is 100mA and
The The b. b. Required frequency Required frequency response is:
c. c. Required ac Required accuracy is
Standard
4-23. AC 4-23.
is a Fluke Model 5 is a Fluke Model 5200A.
critical requirements. critical requirements.
4-24. TEST 4-24.
4-25. Performance Test Cards 4-25.
of this section and are to be used to record the 3478A's of this section and are to be used to record the 3478A's
performance. It is recommended t performance.
refer to them while doing refer to
set-up information are printed on the cards for easy set-up information are printed on the cards for easy
reference. Since the 3478A's reference.
limits are printed on the cards, the cards can be used as limits are printed on the cards, the cards can be used as
an abbreviated test procedure (if you are familiar with an abbreviated test procedure (if you are familiar with the
test procedures). test procedures).
permanent record and may be reproduced without permanent record and may be reproduced without
written permission from Hewlett-Packard. written permission from Hewlett-Packard.
4-26. CALIBRATION 4-26.
4-27. A periodic p 4-27.
the 3478A. This should be done as the 3478A.
inspection test and at a 90 day or I year interval, inspection test and at a 90 day or I year interval,
dependent dependent
accuracy requirements. accuracy requirements.
4-28. 4-28. TEST
4-29. If the 4-29.
necessary calibration dependent on what test failed (e.g. necessary calibration dependent on what test failed (e.g.
The
do the DC Volts Calibration for a DC Volts Test failure). do the DC Volts Calibration for a DC Volts Test failure).
If only one range fails, calibrate that range only (this is If only one range fails, calibrate that range only (this is
only true for the DC Volts and Ohms Functions), only true for the DC Volts and Ohms Functions),
otherwise, otherwise, calibrate the
can not be corrected by calibration, go to Section VII of can not be corrected by calibration, go to Section VII of
this manual for servicing information. this manual for servicing information.
4-30. 4-30. INSTRUMENT
4-31. 4-31. Instrument
calibration procedure. calibration procedure. Except for the
Performance and Calibration test signals, the signals can Performance and Calibration test signals, the signals can
be applied to either the 3478A's Front or Rear Input be applied to either the 3478A's Front or Rear Input
Terminals. Terminals. The signals for
and Calibration can only be applied to the front panel and Calibration can only be applied to the front panel
an
terminals. Make sure t terminals.
correct position before applying the signals. correct position before applying the signals.
4-32. INSTRUMENT 4-32.
Model
4-33. Specifications are 4-33.
The
of the inst of the instrument which
4-3 4-3
is 100mA and IA.
response is: 1KHz and 5KHz.
curacy is +.03%. +.03%.
AC Calibrator. Calibrator. The recommended The recommended AC Calibr
200A. Refer to Refer to paragraph 4-11
TEST CARDS CARDS
Performance Test Cards are provided
It is recommended to fill out the
them while doing the test. the test. The test limits and
Since the 3478A's set-up information an
The cards The cards can also
CALIBRATION CYCLE CYCLE
A periodic performance verification erformance verification is required for
This should be done as part of an incoming
on on your your environmental environmental
TEST FAILURE FAILURE
If the 3478A fails a 3478A fails any Perfor ny Performance Test, do
calibrate the complete function. complete function. If the failure
INSTRUMENT SET-UP SET-UP
Instrument set-up is set-up is specified in each specified in each test and
Except for the AC and DC Current
The signals for the AC the AC and DC Cu
Make sure the FRONT/REAR Sw he FRONT/REAR Switch is in
INSTRUMENT SPECIFICATION SPECIFICATION
Specifications are the performance the performance characteristics
rument which are certified. are certified. These specifica
TM 11-6625-3071-14 TM 11-6625-3071-14
IA.
1KHz and 5KHz.
AC Calibrator ator
paragraph 4-11 for the for the
are provided at the en at the end d
o fill out the cards and cards and
The test limits and
set-up information and test d test
can also be used be used as a as a
is required for
part of an incoming
condition condition and and
mance Test, do the
If the failure
test and
AC and DC Current
and DC Current Test rrent Test
itch is in the
characteristics
These specifica
the
the
the