ESI-870 Resistance/Resistivity Indicator
15
VIII.
Functionally Testing the ESI-870
A.
The ESI-870 has no internal parts to adjust, so verification of calibration can be
achievedusing the following process.
If verification cannot be achieved, the unit
should be returned to the supplier.
B.
Using the Resistance reference inputs & Auxiliary
connections at the end of the unit, insert one lead into
each input jack and place the electrode switch to the
“ELECTRODES OFF” position.
C.
Insert the opposite ends of the leads into a Resistance
Reference such as the PRO
STAT
®
PAR-809C Variable
Resistance Reference
1.
The range of the resistance reference required is
from >1.0x10
3
to 1.0x10
10
Ohms.
2.
Measurements greater than 10
10
are calculated
using cad generated techniques, as high
resistance’s greater than 10
10
are difficult to verify
with a test voltage of 9 volts.
D.
Once the leads are inserted, set the resistance reference
to the desired resistance, i.e. 10
3
1.
Press and hold the ESI-870's "Press to Test"
button
Important
Note:
If you do not enable the
“ELECTRODES OFF” switch, the brass
electrodes are active when these two Auxiliary
Connections are used. If body or material
contact is made with the brass electrodes during
this measurement mode, the indicated reading
may be affected.
2.
The
10
3
LED (as read on the top scale) should
light
3.
Repeat this process using all of the ranges possible with the resistance
reference
E.
To measure the changeover point between decades:
