Making Measurements 2
Agilent U1251A/U1252A User’s and Service Guide
51
Measuring Capacitance
The meter measures capacitance by charging the capacitor
with a known current for a period of time, measuring the
voltage and then calculating the capacitance. Larger the
capacitors, longer the charging time.
Measuring tips
:
•
For measuring capacitances greater than 10,000
μ
F,
discharge the capacitor first, then select a suitable
range for measurement. This will speed up measuring
time in order to obtain the correct capacitance value.
•
For measuring small capacitances, push
with the
test leads open to subtract the residual capacitance of
the meter and leads.
1
Set the rotary switch to
.
2
Connect the red and black test leads to input terminals
and
COM
respectively.
3
Use the red probe lead on the positive terminal of the
capacitor while the black probe lead on the negative
terminal.
4
Read the display.
C A U T I O N
Disconnect circuit power and discharge all high-voltage capacitors before
measuring capacitance to prevent possible damage to the meter or the
device under test. To confirm that capacitors have discharged, use the DC
voltage function.
N O T E
means capacitor is charging.
means capacitor is discharging.
Summary of Contents for U1251A
Page 34: ...34 Agilent U1251A U1252A User s and Service Guide 1 Getting Started Tutorial...
Page 116: ...116 Agilent U1251A U1252A User s and Service Guide 5 Maintenance...
Page 120: ...120 Agilent U1251A U1252A User s and Service Guide 6 Accessories...
Page 156: ...156 Agilent U1251A U1252A User s and Service Guide 8 Specifications...
