Prostat PRF-922B Manuel utilisateur

PRF-922B

User Manual

MINIATURE TWO-POINT PROBE SET



  Page

I. Introducon & Descripon 4

II. Cauons & Warnings 4

III. PRF-922B Micro Probe & PRV-913B Verier Operaons 6

IV. Handling & Maintenance 10

V. Warranty Informaon 11

General Specicaons 12



manual may be used or reproduced in any manner whatsoever without wrien permission. For informaon contact

Prostat Corporaon, 1072 Tower Lane, Bensenville, IL 60106 USA

Prostat is the registered trademark of Prostat® Corporaon

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 conjuncon 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 combinaon 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

conducve synthec 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 applicaons.

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 precauons and measurement pracces to avoid

personnel shock. Read this manual in its enrety before aempng to use these products.



This manual displays Cauons and Warnings alerng the user to hazardous operaon and ser-

vicing condions.  or  headings throughout this publicaon ag this infor-

maon, where appropriate. Follow all Cauon and Warning instrucons at all mes.





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 combinaon is limited to a very low, typically harmless level. However, a

disnct hazard exists in the operator’s reacon to a possible shock.

b. To avoid shock, operang 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 connecons when power is being applied to the probe.

c. The designed operang voltage limit for normal auding and laboratory measurements is

100 volts. Exceeding 100 volts greatly increases the risk of personnel shock hazards.



Never exceed the maximum applied operang test voltage of 100 volts

d. Only qualied instrument repair and test personnel should exceed the 100-volt opera-

on limit, and then do so 



e. Never, under any condions, exceed 500 volts during xture test or repair.

B. Other Operaonal Precauons

1. Do Not Use the PRF-922B Micro Probe if it fails to funcon during its connuity inspecon test.

2. Do Not Use the PRF-922B Micro Probe if it becomes damaged in any way

3. Only Prostat Corporaon authorized, qualied 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 aempted repair will absolutely void product

warranty and completely absolve Prostat Corporaon, its employees, suppliers and representa-

ves of any responsibility, liability, or other, whatsoever.



Unauthorized opening of xture or instrument housings, device tampering, or aempted re-

pair will absolutely void product warranty and completely absolve Prostat Corporaon 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 protecve caps in place in a dry environment, preferably at ≤ 20% Relave Humidity.



Storage or use of these instruments, xtures and devices in damp or wet condions may

cause damage to electrical circuits, and contact surfaces, which may eect performance or

increase the possibility of personnel shock or arc discharge.

6. Do not use these xtures and devices in combusble or explosive environments.



Improper handling and use of energized circuits may cause arc discharge, which in turn may

cause the ignion of combusble materials or fumes. Do not use exposed energized circuits in

ammable areas.

7. Do not aempt 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 protecve cover from PRF-922B’s

BNC connecon.

b. Aach shielded cable to the probe’s BNC connecon

(Figure 2).

2. Connect measurement cable to Dual Banana BNC Converter

(Figure 3).







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 connuity test, verica-

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 Posive (+) power terminal.



To remove BNC connecons, apply slight pressure and twist connector counter clockwise

B. Conrming Proper BNC Connecons, Connuity & High Resistance Tests

The following conrms proper connecons by checking connuity of the micro probe against a

metal plate, then conrms its ability to measure high resistance.

1. To conrm general setup and funcon 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 vercally, and apply pressure to slightly compress the electrodes, mak-

ing posive contact with the metal surface.

b. Acvate 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 indicaon. 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 vercally, and apply pressure to compress the electrodes, making posi-

ve contact with the insulated surface.

b. Acvate 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 indicaon. 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 Vericaon Using the PRV-913B Two-Point vericaon xture

1. Connect the BNC/banana adapter to the wide range, resistance measurement instrument.

Flange side of dual banana should be connected to the Posive (+) power terminal. This applies

test voltage to the 10 outer ring electrodes.

2. Remove PRF-922B Probe Cover (Figure 5).

3. Posion PRF-922B vercally into the PRV-913B Two-Point

Verier with its spring loaded pin electrodes making direct

contact with the Verier’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 posioned in the

PRV-913B Two-Point Verier. 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. Posion the PRF-922B vercally directly over test

area and lower it unl the spring loaded center

electrode makes direct contact with the material

under test.

3. Apply sucient pressure on the probe unl the

center and outer spring loaded electrode are

parally compressed while in contact with the test

material.









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-

necon 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 iniate 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 opmal performance and accuracy, use the Prostat PRS-801 Resistance System

in its AUTOMATIC Mode (either Default Mode 1 [Ohms], or Mode 2 [Exponenal 1.0EXX/

Ohms] display). AUTOMATIC Mode will control test voltage, resistance range adjustment

and electricaon period automacally.



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 protecon.

2. Periodically, remove all spring-loaded test pins. Clean the spring-loaded test probes and Teon

mounng disk with a soluon 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 soluon. 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 characteriscs.

(Contact Prostat Corporaon, Customer Service for spare

replace ment probes.)

c. Clean and dry the Teon mounng disk twice to insure

cleanliness

d. Carefully re-install the spring-loaded test probes, and fully

re-seat them in their sockets

3. Aer cleaning, perform Connuity, High Resistance and Veri

er checks.

B. Use of Conducve Rubber Electrode “Boots” to Reduce Contact

Resistance

1. Measurements obtained without use of conducve rubber

boots will simulate material contact by metal objects. In this

situaon, contact resistance is high and the resulng mea-

surements will be higher than those obtained using conduc-

ve rubber boots. (Figure 9)

2. Conducve 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 Vericaon Fixture

1. Store the PRV-913B in a clean, dry environment.

2. Periodically, clean and dry the gold xture contact segments twice with a soluon of laboratory

grade isopropyl alcohol and laboratory quality swab.















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