User`s guide

Agilent B1500 User’s Guide, Edition 7 2- 15
Introduction
Rear View
WARNING There are potentially hazardous voltages (200 V for HPSMU, and 100 V for
MPSMU/HRSMU/ASU) present at the Force, Sense, and Guard terminals of
Agilent B1500A. To prevent electrical shock, the following safety precautions
must be observed during the use of the B1500A.
a. Use a three-conductor AC power cable to connect the cabinet (if used)
and the B1500A to an electrical ground (safety ground).
b. If you do not use the 1644
2B test fixture, you must install and connect an
interlock circuit that opens the Interlock terminal when the shielding
box access door is opened.
c. Confirm periodically that the interlock function works norma
lly.
d. Before touching the connections on the Force, Guard, and Sense
terminals, tu
rn the B1500A off and discharge any capacitors. If you do
not turn the B1500A off, complete all of the following items, regardless
of the B1500A settings.
•Press the
Stop key to set the module output off.
• Confirm that the High Voltage indicato
r is not lit.
• Open the shielding box access door (open the Interlock terminal).
• Discharge any capacitors connected to an SMU.
e. Warn persons working around the B1
500A abou
t dangerous conditions.
E. CMU module
The multi frequency capacitance measurement unit (MFCMU) has four coaxial
connectors, Lcur, Lp
ot, Hpot, and Hcur, for the four-terminal pair connection.
The Hcur and Hpot have to be connected together at a terminal of the device
under test (DUT). Also the Lcur and Lpot have to be connected together at the
other terminal of the DUT. Then, the guard lines of four-terminal pair must be
connected together.
CAUTION Do not apply voltage more than ±25 V to the MFCMU input terminals. Failure to
heed this caution may result in damage to the module.