Prostat PRF-922B Manuel utilisateur
PRF-922B
User Manual
MINIATURE TWO-POINT PROBE SET
Page
I. Introducon & Descripon 4
II. Cauons & Warnings 4
III. PRF-922B Micro Probe & PRV-913B Verier Operaons 6
IV. Handling & Maintenance 10
V. Warranty Informaon 11
General Specicaons 12
Copyright © 2012 by Prostat® Corporaon. 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 wrien permission. For informaon contact
Prostat Corporaon, 1072 Tower Lane, Bensenville, IL 60106 USA
Prostat is the registered trademark of Prostat® Corporaon
4Rev. A / November 2005
PRF-922B Miniature Two-Point Probe Set
The PRF-922B Miniature Two-Point Resistance Fix-
ture Set accurately measures surface resistance of
small areas. It consists of a PRF-922B Two-Point Re-
sistance Fixture assembly, shielded cable equipped
with BNC connectors; probe cover, and a BNC to
male banana adapter.
The PRF-922B works in conjuncon with a wide
range resistance instrument, such as the Prostat
PRS-801 Resistance System, PRS-812 Resistance
Meter, or ESD Check ESI-870 Resistance Indicator,
and an insulated test bed. This instrument and
xture combinaon provides direct point-to-point
resistance measurements in ohms across the sur-
face of small parts and assemblies.
A. PRF-922B Two-Point Resistance Fixture Descrip-
on
This precision xture consists of 2 gold plated,
spring-loaded contact electrodes spaced 0.250 inches (6.35mm) apart, center-to-center. The elec-
tronic quality gold plated contact probes are 0.1-inch (2.54mm) in diameter, and are supplied with
conducve synthec rubber contact boots, which are 0.125-inch (3.18mm) diameter. The conduc-
ve boots are used to reduce contact resistance between the gold contact probes and materials
under test in certain applicaons.
1. The resistance measurement range of the PRF-922B xture 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 pres-
sure during measurement.
4. Overall size of the PRF-922B is 0.50 inches in diameter by 7.0 inches (178 mm) long. This op-
mal size and shape make the xture very comfortable and easy to handle. Its outer housing is
made of black anodized aluminum.
As with any electrical device, use proper electrical precauons and measurement pracces to avoid
personnel shock. Read this manual in its enrety before aempng to use these products.
This manual displays Cauons and Warnings alerng the user to hazardous operaon and ser-
vicing condions. or headings throughout this publicaon ag this infor-
maon, where appropriate. Follow all Cauon and Warning instrucons at all mes.
5
Rev. A / November 2005
PRF-922B Miniature Two-Point Probe Set
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 touch-
ing 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 combinaon is limited to a very low, typically harmless level. However, a
disnct hazard exists in the operator’s reacon to a possible shock.
b. To avoid shock, operang personnel should not touch the electrodes, or any exposed me-
tallic parts of the PRF-922B xture or cable assembly when power is applied to the probe.
To avoid electrical shock, Do Not Touch the xture test electrodes, test bed, or exposed
metal BNC connecons when power is being applied to the probe.
c. The designed operang voltage limit for normal auding and laboratory measurements is
100 volts. Exceeding 100 volts greatly increases the risk of personnel shock hazards.
Never exceed the maximum applied operang test voltage of 100 volts
d. Only qualied instrument repair and test personnel should exceed the 100-volt opera-
on limit, and then do so
e. Never, under any condions, exceed 500 volts during xture test or repair.
B. Other Operaonal Precauons
1. Do Not Use the PRF-922B Micro Probe if it fails to funcon during its connuity inspecon test.
2. Do Not Use the PRF-922B Micro Probe if it becomes damaged in any way
3. Only Prostat Corporaon authorized, qualied repair personnel may open PRF-922B or PRV-
913B housing, terminal assemblies, or perform product repair. Unauthorized opening of xture
or instrument housings, device tampering, or aempted repair will absolutely void product
warranty and completely absolve Prostat Corporaon, its employees, suppliers and representa-
ves of any responsibility, liability, or other, whatsoever.
Unauthorized opening of xture or instrument housings, device tampering, or aempted re-
pair will absolutely void product warranty and completely absolve Prostat Corporaon of any
responsibility, liability, or other, whatsoever.
Electrodes will become contaminated with skin oils and
salts, and may become damaged or rendered inaccurate.
6Rev. A / November 2005
PRF-922B Miniature Two-Point Probe Set
Always store devices
with protecve caps in place in a dry environment, preferably at ≤ 20% Relave Humidity.
Storage or use of these instruments, xtures and devices in damp or wet condions may
cause damage to electrical circuits, and contact surfaces, which may eect performance or
increase the possibility of personnel shock or arc discharge.
6. Do not use these xtures and devices in combusble or explosive environments.
Improper handling and use of energized circuits may cause arc discharge, which in turn may
cause the ignion of combusble materials or fumes. Do not use exposed energized circuits in
ammable areas.
7. Do not aempt to measure energized materials, items or circuits with the PRF-922B
8. The PRF-922B is a precision xture 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.
A. PRF-922B Setup
1. Connect measurement cable to PRF-922B
a. Remove black rubber protecve cover from PRF-922B’s
BNC connecon.
b. Aach shielded cable to the probe’s BNC connecon
(Figure 2).
2. Connect measurement cable to Dual Banana BNC Converter
(Figure 3).
7
Rev. A / November 2005
PRF-922B Miniature Two-Point Probe Set
-
3. Once the cable and BNC adapter are installed the PRF-922B is ready for connuity test, verica-
on and use (Figure 4).
4. To use, connect dual banana converter to wide range, resistance instrument with ¾ inch termi-
nal spacing. Flange side of dual banana should be connected to the Posive (+) power terminal.
To remove BNC connecons, apply slight pressure and twist connector counter clockwise
B. Conrming Proper BNC Connecons, Connuity & High Resistance Tests
The following conrms proper connecons by checking connuity of the micro probe against a
metal plate, then conrms its ability to measure high resistance.
1. To conrm general setup and funcon 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 vercally, and apply pressure to slightly compress the electrodes, mak-
ing posive contact with the metal surface.
b. Acvate 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 indicaon. For
example, <103 ohms when using the ESD Check ESI-870 Resistance Indicator, or <104
ohms when using the PRS-801 Resistance Meter.
2. Repeat the above procedure using the clean insulated surface (Black, labeled side) of the PTB-
920, or an insulated acrylic plate.
8Rev. A / November 2005
PRF-922B Miniature Two-Point Probe Set
a. Hold the PRF-922B vercally, and apply pressure to compress the electrodes, making posi-
ve contact with the insulated surface.
b. Acvate 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 indicaon. For
example, 1012 or >1012 ohms when using the ESD Check ESI-870 Resistance Indicator
(3) or approximately 1011 ohms when using the PRS-801 Resistance Meter
C. PRF-922B Vericaon Using the PRV-913B Two-Point vericaon xture
1. Connect the BNC/banana adapter to the wide range, resistance measurement instrument.
Flange side of dual banana should be connected to the Posive (+) power terminal. This applies
test voltage to the 10 outer ring electrodes.
2. Remove PRF-922B Probe Cover (Figure 5).
3. Posion PRF-922B vercally into the PRV-913B Two-Point
Verier with its spring loaded pin electrodes making direct
contact with the Verier’s gold plated test segments.
4. Depending on your resistance instrument select either 10V
or 100V test voltage.
5. Measure PRF-922B probe resistance while posioned in the
PRV-913B Two-Point Verier. 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. Posion the PRF-922B vercally directly over test
area and lower it unl the spring loaded center
electrode makes direct contact with the material
under test.
3. Apply sucient pressure on the probe unl the
center and outer spring loaded electrode are
parally compressed while in contact with the test
material.
9
Rev. A / November 2005
PRF-922B Miniature Two-Point Probe Set
Adjust probe pressure to insure that the electrode springs are controlling the probe’s con-
necon with the material’s surface and that the springs are not fully compressed against
their stops. This will insure reproducible measurements.
4. Select appropriate instrument test voltage and iniate resistance measurement. ESD Associa-
on S11.11 test voltage guidelines for measuring packaging materials are as follows:
a. For material resistance measurements of less than 1.0x104 ohms, use <10 volts.
b. For measurements of 1.0x104 to <1.0x106 ohms, use 10 volts.
c. For measurements greater than 1.0x106 ohms, use 100 volts
For opmal performance and accuracy, use the Prostat PRS-801 Resistance System
in its AUTOMATIC Mode (either Default Mode 1 [Ohms], or Mode 2 [Exponenal 1.0EXX/
Ohms] display). AUTOMATIC Mode will control test voltage, resistance range adjustment
and electricaon period automacally.
10 Rev. A / November 2005
PRF-922B Miniature Two-Point Probe Set
A. PRF-922B Miniature Two-Point Probe Fixture
1. Store the PRF-922B in a clean, dry environment with both BNC and Probe covers installed for
environmental and mechanical protecon.
2. Periodically, remove all spring-loaded test pins. Clean the spring-loaded test probes and Teon
mounng disk with a soluon of laboratory grade isopropyl alcohol and a lint-less cloth, or
laboratory quality swab. Allow components to dry thoroughly be fore re-assembling.
a. Remove each test probe individually by grasping it rmly then
pulling it straight out of its socket.
b. Inspect each probe for damage, then clean with the
alcohol soluon. If a probe is damaged, i.e., bent, does not
compress smoothly, or has deep surface scratches, replace it
with a new probe of the same size and characteriscs.
(Contact Prostat Corporaon, Customer Service for spare
replace ment probes.)
c. Clean and dry the Teon mounng disk twice to insure
cleanliness
d. Carefully re-install the spring-loaded test probes, and fully
re-seat them in their sockets
3. Aer cleaning, perform Connuity, High Resistance and Veri
er checks.
B. Use of Conducve Rubber Electrode “Boots” to Reduce Contact
Resistance
1. Measurements obtained without use of conducve rubber
boots will simulate material contact by metal objects. In this
situaon, contact resistance is high and the resulng mea-
surements will be higher than those obtained using conduc-
ve rubber boots. (Figure 9)
2. Conducve rubber boots are used to reduce contact re-
sistance between the electrodes and material under test.
Measurements made with boots installed are typically lower
than those obtained without boots.
C. PRV-913B Two-Point Dual Vericaon Fixture
1. Store the PRV-913B in a clean, dry environment.
2. Periodically, clean and dry the gold xture contact segments twice with a soluon of laboratory
grade isopropyl alcohol and laboratory quality swab.
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3
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