Keithley 8009, Instruction Manual

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Safety con
The earth
be conn
groun
The use of hazardous voltage requires that interlock
is activ
cabl
and
6517B wil
WARNING
To prevent electrical shock that could cause injury or
death:
1. Put the Model 6517 or Model 6517B voltage source in STANDBY
before opening the lid of the Model 8009.
2. Make sure the interlock cable is connected as shown in Figure 2-3
(Model 6517) or Figure 2-4 (Model 6517B).
3. Make sure the earth ground screw on the Model 8009 is
connected to a known safety earth ground using the Model
8007-GND-3 or #18 AWG or larger wire.
2.6 Test voltage
Typically specified test voltages to be applied to the insulator sample are 100V,
250V, 500V and 1000V. Higher test voltages are sometimes used, however the
maximum test voltage that may be applied to the Model 8009 is 1000V. The most
frequently used test voltages are 100V and 500V. The Keithley Instruments
Model 6517 can provide test voltages up to 1000V.
2.7 Current measurement range and compliance limit
To make the most accurate resistivity measurement, the Model 6517 must be on
the most sensitive (optimum) current measurement range. The simplest way to
achieve this is by placing the Model 6517 in autorange.
In general, a current compliance limit is to protect the device under test (DUT).
For virtually all resistivity tests, protecting the insulator sample from excessive
current is not a concern.
If manual ranging must be used, you may have to experiment to determine the
best measurement range and subsequent compliance limit. For detailed
information on compliance and measurement range selection, refer to the Model
6517 or Model 6517B Reference Manuals.
2.8 Electrification time
Electrification time is the total time that the specified voltage is applied to the
insulator sample when the current measurement is taken. For example, for an
electrification time of 60 seconds, the current measurement would be taken after
the insulator sample was subjected to the applied voltage for 60 seconds. Keep in
mind that experimentation may dictate a different electrification time. Unless
otherwise specified, an electrification of 60 seconds is recommended.
Figure 2-4
Connecti
Mo
10 11