Prostat PRF-922B Manuel utilisateur

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

Resistance Fixture Set

PRF-922B, PRF-922A-B & PRV-913B

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

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

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

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

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

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

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

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

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

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