Atec Agilent-16047A - Manual (Page 82)

77
DC (High resistance) Material
Furnished Accessories:
Options:
16008B-001: Add 26 & 76 mm diameter electrodes
16008B-002: Add 26 mm diameter electrode
Compensation and Measurement: Using the selector
switch on the 16008B, select either the volume resistivity
or surface resistivity measurement configuration. Open
compensation is recommended before measurement and
when the measurement configuration is switched.
Separate the upper electrode from the main electrode by
turning the contact pressure load knob until the upper
electrode does not move. Then, close the top cover and
perform open compensation. After open compensation, the
material under test (MUT) is placed on the main electrode
and the upper electrode is placed over it. Next, turn the
load knob to adjust the electrode contact pressure on the
MUT. Close the top cover and measure the MUT's surface
or volume resistivity.
It is vital to make measurements, which are compatible to
a certified test method (standard). It is shown below that
the 16008B can make resistivity measurements which are
compatible with ASTM D257 Standard Test Methods for
DC Resistance or Conductance of Insulating Materials. In
the figure and tables shown below, the size and shape is
compared for two pairs of electrodes: one that is specified
in ASTM D257 and the one that is used with the 16008B
Resistivity Cell. The similarity implies that the 16008B is
compatible with ASTM D257.
Compatibility with ASTM D257
Choice 1 Choice 2
A 76 mm 25 mm
B 88 mm 38 mm
C 100 mm 50 mm
D 100 mm 50 mm
Opt. 16008B-001 Opt. 16008B-001/002
A 76 mm 26 mm
B 88 mm 38 mm
C 98 mm 48 mm
D 110 mm 110 mm
ASTM D257's recommended electrode sizes 16008B electrode sizes
Description P/N Qty.
Operation and Service Manual 16008-90011 1