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Measurements and Sourcing Voltage
3-9
Step 4. Connect the resistance to be measured to the picoammeter
Basic connections for ohms measurements are shown in
. Note that both the
picoammeter INPUT and the V-SOURCE OUTPUT jacks are connected to the resistance
under test.
WARNING
A safety shield is advisable whenever measurements are being made
with voltages over 30V DC. Connections for the safety shield are
shown in
. The metal safety shield must completely surround
the noise shield or floating test circuit, and it must be connected to
safety earth ground using #18 AWG or larger wire.
Step 5. Select ohms function
Press the I|
Ω
key to make sure the ohms function is selected.
Step 6. Turn on voltage source
Press the OPER key to turn on the voltage source output. The VOLTAGE SOURCE
OPERATE indicator will turn on.
Step 7. Disable zero check and take a reading from the display
If the readings are noisy, use filtering to reduce noise. It may be advisable to use the
alternating voltage ohms, or add shielding.
NOTE
For any ohms measurements, the ohms reading is invalid and unknown if the
voltage source is in compliance. Therefore, a value of -9.9e+36 will be returned
over the GPIB, and the message I-LIMIT will be displayed on the front panel for
both normal readings and buffer recall readings for any ohms readings where
the voltage source went into compliance.
Summary of Contents for 6487
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Page 35: ...1 20 Getting Started Model 6487 User s Manual...
Page 47: ...2 12 Connections Model 6487 User s Manual...
Page 61: ...3 14 Measurements and Sourcing Voltage Model 6487 User s Manual...
Page 85: ...7 8 Remote Operation and Commands Model 6487 User s Manual...
Page 86: ...A Specifications...
Page 88: ...B GeneralMeasurement Considerations...
Page 94: ...C ExamplePrograms...
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