HP 3478A Technical Manual page 49

3478A 3478A
4-92. 4-92. Equipment Required. Equipment Required.
required test equipment for the DC Current Calibration required test equipment for the DC Current Calibration
and Test. and Test.
Digital Voltmeter (-hp- Model 3456A) Digital Voltmeter (-hp- Model 3456A)
DC Volts Standard (Systron Donner Model M107) DC Volts Standard (Systron Donner Model
AC-DC Current Calibrator (Valhalla Model 2500) AC-DC Current Calibrator (Valhalla Model 2500)
4-93. 4-93. Calibration Calibration and and Test
following: following:
a. a. Reset the Reset the 3478A by 3478A by pressing the blue S
and then the SGL/TRIG (TEST/RESET) button. and then the SGL/TRIG
b. b. Make sure t Make sure the front he front panel CAL ENABL
set to the calibration enable position (the slot of the set to the calibration enable position (the slot of the
switch is in the vertical position). switch is in the vertical position).
c. c. (Step #1.) Set (Step #1. ) Set the 3478 the 3478A's to
Function and the 300mA Range. Function and the 300mA Range.
d. d. Set the Set the multimeter to multimeter to the Single Trigger
pressing the SGL/TRIG button. pressing the SGL/TRIG button.
e. e. Short the Short the 3478A's 3478A's A (Amps)
INPUT Terminal. INPUT Terminal.
f. f. Press the Press the blue Shift blue Shift button
(CAL) button. (CAL) button.
g. g. Press SGL/TRI Press SGL/TRIG button G button once.
h. h. (Step #2.) Set t (Step #2.) Set the 3478A to the 3A he 3478A to the 3A Range.
i. i. Calibrate the 347 Calibrate the 3478A by doing the 8A by doing the procedure in steps
f and g. f and g.
j. j. Remove the short Remove the short from the 3478 from the 3478A. A.
k. k. Set the DC Volts Sta Set the DC Volts Standard for a + I
I. I. Set the Set the Digital Voltmeter Digital Voltmeter to the D
IV Range, and 6 Digit Display mode. IV Range, and 6 Digit Display mode.
m. m. Set the Set the AC-DC Current AC-DC Current Calibrator to
Range. Range.
n. n. Connect the Connect the DC DC Volts
Voltmeter to the AC-DC Current Calibrator as shown in Voltmeter to the AC-DC Current Calibrator as shown in
Figure 4-4. Figure 4-4.
o. o. (Step #3.) (Step #3.) Set the 3478A t Set the 3478A to the 300mA Range and
calibrate the 3478A by doing the procedure in steps f and calibrate the 3478A by doing the procedure in steps f and
g. g.
p. p. (Step #4.) Set (Step #4.) Set the 3478A to t the 3478A to the 3A Range and the
AC-DC Calibrator to the IA Range. AC-DC Calibrator to the IA Range.
q. q. Calibrate t Calibrate the 3478A he 3478A by
steps f and g. steps f and g.
The following is the The following is the
M107)
Test Procedure. Procedure.
pressing the blue Shift button hift button
(TEST/RESET) button.
panel CAL ENABLE Switch is E Switch is
A's to the DC the DC Current
the Single Trigger Mode by
A (Amps) Terminal to t Terminal to the LO
button and then and then the LOCAL the LOCAL
once.
Range.
procedure in steps
ndard for a + IV output. V output.
to the DC Volts Function, C Volts Function,
Calibrator to the 100mA the 100mA
Volts Standard Standard and and Digital
o the 300mA Range and
he 3A Range and the
by doing the doing the procedure in procedure in
r. r. Since the Since the performance checks are t
calibration points, the che calibration poin
the DC Volts Standard and Digital Voltmeter from the the DC Volts Standard and Digital Voltmeter from the
AC-DC Current Calibrator and remove the calibrator AC-DC Current Calibrator and remove the calibrator
from the 3478A. This completes the 3478A' from the 3478A.
Calibration and Test. Calibration and Test.
Do the Do the 4-94. AC Volts 4-94.
4-95. The AC Volts Function is calibrat 4-95.
calibration source, 3V a calibration sou
applied, the 3478A determines the gain constants by applied, the 3478A determines the gain constants by
taking a measurement in the 3V Range and 30V Range. taking a measurement in the 3V Range and 30V Range.
The measurement in the 3V Range is a full-scale The measurement in the 3V Range is a full-scale
measurement and the 30V Range is a 1/10 scale measurement and the 30V Range is a 1/10 scale
measurement. The ranges are measurement.
the multimeter. the multimeter.
Current
4-96. 4-96.
(paragraph 4-86) has been done before doing the AC (paragraph 4-86)
Mode by Volts Calibration Volts Calibration and
AC Volts Calibration Signals, Performance Test Signals, AC Volts Calibration Signals, Performance Test Signals,
and Performance Test Limits. and Performance
he LO shown in parenthesis in shown in
are applied to the 3478A's HI and LO are applied to the 3478A's HI and LO INPUT Terminals.
4-97. 4-97.
equipment for the AC Volts Calibration and Test is an AC equipment for the AC Volts Calibration and Test is an AC
Calibrator (Fluke Model 5200A/5215A option 05). Calibrator (Fluke Model 5200A/5215A option 05).
4-98. 4-98.
following: following:
a. a. Reset the Reset the 3478A by p
and then the SGL/TRIG (TEST/RESET) button. and then the SGL/TRIG (TEST/RESET) button.
b. b. Make sure th Make sure the front p
set to the calibration enable position (the slot of the set to the calibration enable position (the slot of the
switch is in the vertical position). switch is in the vertical position).
c. c. (Step #1.) Se (Step #1.) Set the 3478A'
and the 3V Range. and the 3V Range.
d. d. Set the Set the multimeter to t
pressing the SGL/TRIG button. pressing the SGL/TRIG button.
Digital
e. e. Set the AC Set the AC Calibrator for a 3V a
connect it to the 3478A's INPUT Terminals. connect it to the 3478A's INPUT Terminals.
f. f. Press the b Press the blue Shift but
(CAL) button. (CAL) button.
g. g.
buttons, adjust the reading on the multimeter until it buttons, adjust the reading on the multimeter until it
agrees with the output value of the AC Calibrator (if the agrees with the output value of the AC Calibrator (if the
output value is known). output value is known).
h. h. Press the Press the SGL/TRIG butto
4-16 4-16
performance checks are the same as th
ts, the checks are not req cks are not required.
This completes the 3478A's DC Current
AC Volts Calibration and Calibration and Test
The AC Volts Function is calibrated using only one
rce, 3V at 1KHz. t 1KHz. With the 3V
The ranges are automatically select
Make sure the DC Make sure the DC Volts Calibrat Volts Calibration and
has been done before doing the AC
and Test. Test. Refer to Refer to Table 4-10
Test Limits. Each step
parenthesis in the procedure. the procedure. All test signals
Equipment Equipment Required. Required.
Calibration Calibration and and Test Test Procedure.
3478A by pressing the blue Sh ressing the blue Shift button
e front panel CAL ENABLE anel CAL ENABLE Switch is
t the 3478A's to the AC Volts Fun
multimeter to the Single Trigger he Single Trigger Mode by
Calibrator for a 3V at 1KHz outpu
lue Shift button and
Using t Using the he 3478A's 3478A's Uprange Uprange and/or
SGL/TRIG button once.
TM 11-6625-3071-14 TM 11-6625-3071-14
he same as the e
uired. Remove Remove
s DC Current
Test
ed using only one
With the 3V AC signal AC signal
automatically selected by ed by
ion and Test Test
Table 4-10 for the for the
Each step in the ta in the table is ble is
All test signals
INPUT Terminals.
The required test The required test
Procedure. Do the Do the
ift button
Switch is
s to the AC Volts Function ction
Mode by
t 1KHz output and t and
ton and then the then the LOCAL LOCAL
and/or Downrange Downrange
n once.