ESI-870 Resistance/Resistivity Indicator
5
1.
For Surface Resistance/Resistivity measurements, the material under test
should be placed on an "insulated" surface for best accuracy.
2.
The instrument must be fully positioned on the material being measured
and the electrode switch must be switched “ON”.
3.
The instrument should be steadied by your fingers so that the full length of
each electrode is making even contact with the material under test.
4.
Slight pressure must be applied when pressing the test button.
B.
The design of the ESI-870 is based on automatic ranging across reference
resistors to provide simple indication of a material's resistance/resistivity.
1.
The two machined brass Electrodes form a single "Square" for resistivity
measurements.
2.
Overall Accuracy of the unit is ±10%.
3.
The decade Changeover Point from one decade to another is based on
measured resistance; ±1/2 decade on logarithmic scale (i.e., 3.16 x 10n)
4.
The accuracy of the Changeover Point is ±1/2 decade.
5.
Instrument Resolution: is one order of magnitude.
V.
Battery Installation & General Maintenance
A. Battery
Installation
1.
Power is supplied by a standard 9 volt battery. One battery will provide
approximately 40 hours of continuous operation.
2.
Replace the battery whenever the unit will not perform an "Initial
Operational Check", described below, or when the unit has not been used
for several weeks or months.
3.
To replace the battery, remove the battery cover on the back of the
instrument by applying pressure to the grid area marked with an arrow, and
sliding the panel towards the bottom end of the case.
4.
Carefully
disconnect
the
instrument
battery power connector from the
battery and discard the old battery in
manner appropriate for your locale.
