H Heuer Instruments UMDT51A, Руководство пользователя

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Performance Testing
LT51 User Manual 85
DC Voltage Measurement
a) Set the LT51 to DMM
– AC/DC Voltage mode.
b) Ensure that the Terminals are set to AB.
c) Connect a 50 V DC Source to the LT51 RTXa-b terminals.
d) Check that the LT51 displays the DC voltage as 50.0

0.5 V.
e) Select the a-g and b-g terminals and ensure that the LT51 displays the DC
voltage as 0 V.
AC Voltage Measurement
a) Set the LT51 to DMM
– AC/DC Voltage mode.
b) Ensure that the Terminals are set to AB.
c) Connect a 30 V / 50 Hz AC Source to the LT51 RTXa-b terminals.
d) Check that the LT51 displays the AC voltage as 30.0

0.8 V.
e) Ensure that the Ringing tone is present during the application of the AC
voltage.
f) Select the a-g and b-g terminals and ensure that the LT51 displays the AC
voltage as 0V.
AC Impedance Measurement
a) Set the LT51 to DMM
– AC Impedance “Mag (Z)” mode (75

ref).
b) Connect the 600

impedance to the RTXa-b terminals.
c) Check that the LT51 measures 600

60

.