Prostat PRF-922B, User Manual

4

Rev. 2  / 3-18-2019

PRF-922B Miniature Two-Point Probe Set

I. Introduc

Ɵ

 on & Descrip

Ɵ

 on

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 

fi

 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 

fi

 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 

fi

 xture is 0.9 ohms at <10 volts to 1.0E+12  

(1.0x10

12

 ) 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 

fi

 xture very comfortable and easy to handle. Its outer housing is 

made of black anodized aluminum.

II. Cau

Ɵ

 ons & Warnings

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.

NOTE

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

CAUTION

 or 

WARNING

 headings throughout this publica  on 

fl

 ag this infor-

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

Figure 1: PRF-922B Miniature Two-Point Resistance 
Fixture Measurement Set.