To Test Voltage Measurement Accuracy - HP 54520 Series Service Manual

Chapter 3: Testing Performance
To test voltage measurement accuracy
To test voltage measurement accuracy
This test verifies the voltage measurement accuracy of the instrument. The measurement is
made in a way that offset errors are not a factor.
Specification
Dual Cursor +(1.25% of full scale + 0.032 x V/div)
Single Cursor +{1.25% of full scale + offset accuracy + (0.016 x V/div)]
Equipment Required
Equipment Critical Specifications
Power Supply 7 mV to 30 Vdc, 0.1 mV resolution
Digital Multimeter Better than 0.1% accuracy
Cables (2) BNC
Adapters (2) BNC (f} to banana (m}
Adapters (2) BNC tee (m)(f)(f)
Blocking capacitor 0.18 LF
Shorting cap BNC
Procedure
Recommended
Model/Part
HP 61144
HP 34401A
HP 10503A
HP 1251-2277
HP 1250-0781
HP 10240B
HP 1250-0774
A power supply provides a reference voltage to check measurement accuracy. The supply is
monitored for accuracy (especially at low voltages). A dc blocking capacitor is used to filter
noise on the input voltage to the oscilloscope,
1 Connect the equipment.
a Use a BNC-to-banana adapter to connect a BNC cable to the power supply.
b Connect a BNC tee to the other end of the cable and use a BNC-to-banana adapter to
connect the tee to the DVM
e Connect another BNC cable to the tee at the DVM and connect a BNC tee to the cable.
d Connect the blocking capacitor to the BNC tee and connect the BNC shorting cap to
the blocking capacitor.
FROW
POWER SUPPLY
TO OM
aNC-To- i AN
BANANA OLN O
ADAPTERS
SNC CABLE a i
TT
gNC TEL uc
10
CHANNEL
ENSUE BLOCKING BNC SHORT
a CAPACITOR
mi)
TEE
[A
{NETO
BNC CABLE
Re' { |
Voltage Measurement Accuracy Equipment Setup
S45a2e11
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