ESI-870 Resistance/Resistivity Indicator
7
2.
Place the instrument, with electrodes
down, on a clean plastic insulating
surface such as the white BOTTOM
surface of the PTB-915 Test Bed.
Measure the resistance of the plastic
sheet using the "ESI-870 Operation
Procedures" described below, i.e.,
Push the "Press to Test" button and
observe LED indication.
a.
The
Red
LED
located
at
right
end of the scale should light
briefly, then the Red center
panel "Insulative -- Exceeds
ESI-870 Range" LED should
light. This indicates a very high resistance "Insulative" material
measurement.
b.
This completes the "Initial Operational Check"
c.
If the highest decade LED "Insulative -- Exceeds ESI-870 Range"
does not light, the unit is not functioning properly, or the battery is
dead.
B. Cleaning
1.
Periodically clean the electrodes and the instrument case area between
them with a soft, non-abrasive cloth, and a solution of 70% alcohol and
water.
2.
Wipe the surface with a soft cloth moistened with clean alcohol and allow to
dry thoroughly.
3.
Dust off any lint.
VI.
Reading the ESI-870 Scale
The ESI-870 resistance measurement function features automatic ranging. It is designed
to provide four (4) kinds of measurements that may be read on two different
resistance/resistivity scales.
A.
UPPER Scale Resistance
Measurement Functions
The UPPER scale is used in three (3)
measurement applications: Surface
Resistivity in Ohms/Square per ASTM
D-257, Resistance to Ground (Rtg)
