Electro-Tech systems 406D Operating Manual page 22

that the size tube to be tested slides easily through the roller contacts. To
test a tube, place it through the hole located on the side of the cage and
slide it through as shown in Figure 3.4-4.
IC Tube
Tension Adjust
Figure 3.4-4: I.C. Shipping Tube Electrodes
3.4.5 Small Sample Electrodes
The standard ETS Model 406D Static Decay Meter is designed to test
film, fabric and rigid samples having a nominal size of 3" x 5". However,
the electrodes can accommodate a sample size down to 4.125" in length.
The electrodes are electrically connected together. The dual electrode
configuration is required to secure thin films and fabrics. For rigid
samples, just the bottom electrode configuration can be used
However, to test undersize samples (<4.125") a special electrode
configuration is required to hold the sample and bring it within view of the
sensor. To install, first remove the magnetic or clamp electrodes, if
installed. Place the .25" (6mm) slots over the threaded rods and secure
with the thumbscrews or wing nuts. If a small rigid sample is being tested
then only the bottom electrode needs to be installed If film or fabric
samples are to be tested then both upper and lower electrodes are
required as shown in Figure 3.4-5a and b respectively. The sample
holders each can be adjusted vertically up to 0.5" (12mm). This allows for
minimum sample lengths from 2.5" to 3.5".
These electrodes come with both aluminum and Delrin clamps in case it
is desired to isolate the rear of the sample.
Adjust the Full Scale Adjust control as described in Section 5.2, para. 4
and then test in the standard manner. NOTE: The field effect using these
electrodes will be greater than the nominal 1500V seen with the standard
electrodes.
Contact the factory for other special configurations.
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