Prostat PRF-922B User manual

P R O F E S S I O N A L
S T A T I C
C O N T R O L
P R O D U C T S
Operations Manual
Miniature 2-Point Probe & Adapte
r
Resistance Fixture Set
PRF-922B, PRF-922A-B & PRV-913B

Copyright 2001-2007 by PROSTATCorporation. All rights reserved. Printed in the United States of
America. No part of this manual may be used or reproduced in any manner whatsoever without written
permission. For information contact PROSTAT Corporation, 1072 Tower Lane, Bensenville, IL 60106
PROSTAT is the registered trademark of PROSTATCorporation

PRF-922B, PRF-922A-B & PRV-913B Two-Point Miniature Concentric Ring Fixture Set
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TABLE OF CONTENTS
PROSTAT®PRF-922B, PRF-922A-B & PRV-913B TWO-POINT MINIATURE CONCENTRIC RING
FIXTURE SET
Title Page #
I. Introduction & Description.............................................................................................. 3
II. Cautions & Warnings ...................................................................................................... 6
III. PRF-922B Micro Probe & PRV-913B Verifier Operations............................................... 8
IV. Handling & Maintenance............................................................................................... 12
V. Warranty Information..................................................................................................... 13
General Specifications.................................................................................................. 15

PRF-922B, PRF-922A-B & PRV-913B Two-Point Miniature Concentric Ring Fixture Set
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I. Introduction & Description
The PRF-922B Miniature 2-Point Resistance Fixture Set accurately measures surface
resistance of small areas. It consists of a PRF-922B Two-Point Resistance Fixture assembly,
shielded cable equipped with BNC connectors; probe cover, and a BNC to male banana
adapter.
The PRF-922B works in conjunction with a wide
range resistance instrument, such as the PROSTAT
PRS-801 Resistance System, PRS-812 Resistance
Meter, or PSI-870 Resistance Indicator, and an
insulated test bed. This instrument and fixture
combination provides direct point-to-point resistance
measurements in ohms across the surface of small
parts and assemblies.
A. PRF-922B Two-Point Resistance Fixture
Description
This precision fixture consists of 2 gold
plated, spring-loaded contact electrodes
spaced 0.250 inches (6.35mm) apart,
center-to-center. The electronic quality gold plated contact probes are 0.1-inch
(2.54mm) in diameter, and are supplied with conductive synthetic rubber contact
boots, which are 0.125-inch (3.18mm) diameter. The conductive boots are used to
reduce contact resistance between the gold contact probes and materials under
test in certain applications.
1. The resistance measurement range of the PRF-922B fixture is 0.9 ohms at
<10 volts to 1.0E+12 (1.0x1012) ohms at 100 volts.
2. Contacts are pogo-pin type ATE quality probes made of beryllium Copper,
coated with 60 micro inch of hard Gold. Spacing allows for measurement of
items with surfaces approximately 0.125 inches wide having a length of 0.32
inches or larger.
3. The contact assembly’s outer housing incorporates “stops” that insure
consistent contact pressure during measurement.
4. Overall size of the PRF-922B is 0.50 inches in diameter by 7.0 inches (178
mm) long. This optimal size and shape make the fixture very comfortable
and easy to handle. Its outer housing is made of black anodized aluminum
PRF-922B Standard accessories include protective cover, one RG-174
cable, a BNC/banana adapter and instructions
Figure 1: PRF-922B Miniature 2-Point
Resistance Fixture Measurement Set

PRF-922B, PRF-922A-B & PRV-913B Two-Point Miniature Concentric Ring Fixture Set
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II. Cautions & Warnings
As with any electrical device, use proper electrical precautions and measurement practices to
avoid personnel shock. Read this manual in its entirety before attempting to use these
products.
A. Use of Measurement Power Supply
1. The PRF-922B is a high performance micro probed designed for use with a
maximum input voltage of 100 volts. As such, it is capable of delivering an
annoying shock to any person touching the spring-loaded contacts when they are
energized.
a. If used with the PROSTAT PRS-801 Resistance System, the current
capability of the micro probe instrument combination is limited to a very
low, typically harmless level. However, a distinct hazard exists in the
operator’s reaction to a possible shock.
b. To avoid shock, operating personnel should not touch the electrodes, or
any exposed metallic part of the PRF-922B fixture or cable assembly
when power is applied to the probe.
c. The designed operating voltage limit for normal auditing and laboratory
measurements is 100 volts. Exceeding 100 volts greatly increases the
risk of personnel shock hazards.
d. Only qualified instrument repair and test personnel should exceed the
100-volt operation limit, and then do so only under controlled
conditions using maximum precautions against personnel shock.
e. Never, under any conditions, exceed 500 volts during fixture test or
repair.
CAUTION
To avoid electrical shock, Do Not Touch the fixture test electrodes, test bed, or exposed metal
BNC connections when power is being applied to the probe.
WARNING
Never exceed the maximum applied operating test voltage of 100 volts.
This manual displays Cautions and Warnings alerting the user to hazardous operation
and servicing conditions. CAUTION or WARNING headings throughout this publication
flag this information, where appropriate. Follow all Caution and Warning instructions at
all times.

PRF-922B, PRF-922A-B & PRV-913B Two-Point Miniature Concentric Ring Fixture Set
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B. Other Operational Precautions
1. Do Not Use the PRF-922B Micro Probe if it fails to function during its continuity
inspection test.
2. Do Not Use the PRF-922B Micro Probe if it becomes damaged in any way
3. Only Prostat Corporation authorized, qualified repair personnel may open PRF-
922B housing, terminal assemblies, or perform product repair. Unauthorized
opening of fixture or instrument housings, device tampering, or attempted repair will
absolutely void product warranty and completely absolve Prostat Corporation, its
employees, suppliers and representatives of any responsibility, liability, or other,
whatsoever.
4. Do Not Touch Electrode Surfaces. Electrodes will become contaminated with skin
oils and salts, and may become damaged or rendered inaccurate.
5. Do Not Use Or Store PRF-922B In Damp Environments Always store devices
with protective caps in place in a dry environment, preferably at 20% Relative
Humidity.
6. Do not use these fixtures and devices in combustible or explosive environments.
7. Do not attempt to measure energized materials, items or circuits with the PRF-922B
WARNING
Unauthorized opening of fixture or instrument housings, device tampering, or attempted
repair will absolutely void product warranty and completely absolve Prostat
Corporation of any responsibility, liability, or other, whatsoever.
CAUTION
Storage or use of these instruments, fixtures and devices in damp or wet conditions may
cause damage to electrical circuits, and contact surfaces, which may effect performance
or increase the possibility of personnel shock or arc discharge.
WARNING
Improper handling and use of energized circuits may cause arc discharge, which in turn
may cause the ignition of combustible materials or fumes. Do not use exposed
energized circuits in flammable areas.

PRF-922B, PRF-922A-B & PRV-913B Two-Point Miniature Concentric Ring Fixture Set
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8. The PRF-922B is a precision fixture to be operated by experienced personnel
familiar in the use and handling of devices employing energized power supplies.
9. Do Not Drop or cause mechanical damage to these devices.
III. PRF-922B Miniature 2-Point Micro Probe & PRV-913B Two-Point Verifier Operations
A. PRF-922B Setup
1. Connect measurement cable to
PRF-922B
a. Remover black rubber
protective cover from PRF-
922B’s BNC connection
b. Attach shielded cable to
the probe’s BNC connec-
tion (Figure 2).
Figure 2: Connect shielded cable to PRF-
922B’s BNC fixture
2. Connect measurement cable to Dual Banana
BNC Converter (Figure 3).
Figure 3: Connect Cable to Banana Converter
Figure 4: PRF-922B with Cable & Banana
Converter
BNC
Connector
Note that the BNC connection system is based on a
“bayonet” design. Locate the 2 locking studs on the
fixture’s male connector. Match them to grooves of
the female connector. Then simply push and twist
the female clockwise until it locks on to the fixture.

PRF-922B, PRF-922A-B & PRV-913B Two-Point Miniature Concentric Ring Fixture Set
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3. Once the cable and BNC adapter are installed the PRF-922B is ready for continuity
test, verification and use (Fig 4).
4. To use, connect dual banana converter to wide range, resistance instrument with ¾
inch terminal spacing. Flange side of dual banana should be connected to the
Positive (+) power terminal.
B. Confirming Proper BNC Connections, Continuity & High Resistance Tests
The following confirms proper connections by checking continuity of the micro probe against
a metal plate, and then confirms its ability to measure high resistance.
1. To confirm general setup and function of the PRF-922B, place the electrodes
against a clean metal surface. For example, the plated metal side of the Prostat
PTB-920, Dual Surface Test Bed.
a. Hold the PRF-922B vertically, and apply pressure to slightly compress the
electrodes, making positive contact with the metal surface.
b. Activate the wide range, resistance instrument to obtain a measurement.
(1) In the case where the Prostat PRS-801 is the measurement instrument, it should
measure approximately 1.0 ohm, or less.
(2) With other instruments, they should provide a LOW resistance indication. For
example, <103 ohms when using the Prostat PSI-870 Resistance Indicator, or
<104ohms when using the Prostat PRS-800 analog Megohmmeter.
2. Repeat the above procedure using the clean insulated surface (Black, labeled
side) of the PTB-920, or an insulated acrylic plate.
a. Hold the PRF-922B vertically, and apply pressure to compress the electrodes,
making positive contact with the insulated surface.
b. Activate the wide range, resistance instrument to obtain a measurement.
(1) In the case where the Prostat PRS-801 is the measurement instrument, it should
measure 1.0x1012 ohms, or greater.
(2) With other instruments, they should provide a HIGH resistance indication. For
example, 1012 or >1012 ohms when using the Prostat PSI-870 Resistance
Indicator, or approximately 1011 ohms when using the Prostat PRS-800 analog
Megohmmeter.
NOTE: To remove BNC connections, apply slight
pressure and twist connector counter clockwise.

PRF-922B, PRF-922A-B & PRV-913B Two-Point Miniature Concentric Ring Fixture Set
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C. PRF-922B Verification Using the PRV-913B Two-Point verification fixture
1. Connect the BNC/banana adapter to the wide range,
resistance measurement instrument. Flange side of dual banana
should be connected to the Positive (+) power terminal. This applies
test voltage to the 10 outer ring electrodes.
2. Remove PRF-922B Probe Cover (Figure 5).
3. Position PRF-922B vertically into the
PRV-913B 2 point verifier with its spring
loaded pin electrodes making direct
contact with the Verifier’s gold plated test
segments. (Figure 6)
4. Depending on your resistance instrument
select either 10V or 100V test voltage.
5. Measure PRF-922B probe resistance while
positioned in the PRV-913B 2-point Verifier.
Resistance should be 1.0x106 ohms 5%.
D. Basic Measurements Using the PRF-922B Micro Probe
1. Place material to be measured on an insulated test bed, the clean insulated surface
(Black, labeled side) of the PTB-920, or an insulated acrylic plate.
2. Position the PRF-922B vertically directly over test area and lower it until the spring-
loaded electrodes makes direct contact with the material under test.
3. Apply sufficient pressure on the probe until the spring-loaded electrodes are partially
compressed while in contact with the test material, and the outer housing “stops”
contact the material under test.
IMPORTANT NOTE:
The outer housing “stops” help ensure consistent probe pressure with the material’s
surface and that the springs are not fully compressed against their stops. This will
provide more reproducible measurements.
Figure 5: Remove Probe Cover
Figure 6: Insert PRF-922 Fixture into PRV-913
Verifier and Measure Verifier Resistance

PRF-922B, PRF-922A-B & PRV-913B Two-Point Miniature Concentric Ring Fixture Set
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4. Select appropriate instrument test voltage and initiate resistance measurement. ESD
Association S11.11 test voltage guidelines for measuring packaging materials are as
follows:
a. For material resistance measurements of less than 1.0x104ohms, use <10 volts.
b. For measurements of 1.0x104to <1.0x106 ohms, use 10 volts.
c. For measurements greater than 1.0x106ohms, use 100 volts
NOTE: For optimal performance and accuracy, use the Prostat PRS-801 Resistance
System in its AUTOMATIC Mode (either Default Mode 1 [Exponential 1.0EXX/Ohms], or
Mode 2 [Ohms] display). AUTOMATIC Mode will control test voltage, resistance range
adjustment and electrification period automatically.
Measurement
Illustrations Using the
PROSTAT PRF-922B
Fixture
Figure 9: Measuring Device Tray
Figure 8: Measuring Tape & Foil
Figure 7: Measuring Carrier Tape
Figure 10: Measuring Formed Tray