Prostat PRS-801, User Manual

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22 Rev. C / January 2012
PRS-812 Resistance Meter
WARNING
To prevent electrical shock, Do Not Touch energized circuits, leads or fixtures while grounded.
Use pre-tested ground connections meeting local safety codes for personnel earth grounding.
Refer to National Electrical Codes and ESD Association Standard S6.1 Grounding for information
and procedures. Only qualified personnel should conduct ground test measurements.
2. Use only Prostat test leads, cables and accessories supplied with the PRS-812. Be sure that
leads are properly connected to their respective terminals as described below.
a. The 10-foot general measurement leads are custom made of high quality, silicon rubber for
maximum insulation properties and measurement accuracy. These leads are intended for
general measurements up to 10
12
ohm range. Shielding is not incorporated in the 10-foot
lead construction.
(1) When installed in the PRS-812 terminals, be sure the right angle sheathed banana
connections are fully inserted and positively seated for full terminal contact.
NOTE
Do not apply excessive force when mounting leads on the terminals to prevent
deformation or damage to the terminal circuit board.
(2) The straight, retractable-sheathed banana plugs are intended for connection to
measurement electrodes, fixtures or clip accessories.
(3) The red lead should be installaed in the positive (+) terminal and the black lead in
the negative (-) terminals.
3. When making measurements in the manufacturing environment, move the instrument and
test leads away from power cables and heavy electrical equipment to prevent electromagnetic
interference.
4. If groundable fixtures are employed for material measurements, and when using 10-foot leads,
attach an auxiliary lead from the fixture to an ESD safe earth ground.
5. Prior to making precision measurements, allow the PRS-812 to warm-up for 3 minutes, then
perform the Low Resistance Calibration procedure. If several measurements are to be made,
periodically check the instrument’s calibration using the supplied calibration shunt.
C. Operation in AUTOMATIC Modes
The PRS-812 was designed to simplify measurement standards and general rules for making wide
range resistance measurements. The PRS-812’s AUTOMATIC mode controls the critical aspects
of Test Voltage, Resistance Range, and Electrification Period to meet ESDA Standard ANSI/ESD
STM11.11 Surface Resistance, and other requirements. Most measurements can be performed in
AUTOMATIC, which has two function modes: