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TECHNICAL BULLETIN PPE-5076.E
Concentric Ring Probe
Installation, Operation and Maintenance
The Charleswater Concentric Ring Probe is compatible with
the following Charleswater Surface Resistance Meters:
Item Description
99026 Digital Surface Resistance Meter Kit
99027 Digital Surface Resistance Meter
99111 Analogue Surface Resistance Meter Kit
99113 Analogue Surface Resistance Meter
Resistivity and Resistance
When it is appropriate to convert a resistance obtained by
this test method to an equivalent resistivity in ohms per
square, multiply the resistance measurements obtained by
this method by ten. The conversion factor of ten is derived
from the geometry of the electrode assembly. NOTE:
Figure 1. Charleswater 99028 Concentric Ring Probe
Conversions to resistivity may not be valid for materials
that are laminated, plated or metallized with conductive
materials. This fact should be understood when users of this
test procedure are required to satisfy specifications given in
“ohms/square.”
Per User guide EN 61340-5-2:1999 Clause 4.1.1
“Point-to-point resistance has been discussed, rather than
the surface and volume resistivity which was found in
previous standards and reports. This change has been
made to cater for non-homogenous materials, which are
becoming increasingly common in these applications, as well
as ease of measurement.”
Made in the
United Kingdom
Figure 2. Charleswater 99120 Concentric Ring Probe
Kit
Description
The Charleswater Concentric Ring Probe is an instrument to
be used in conjunction with a resistance megohmmeter, such
as the Charleswater 99026 Digital Surface Resistance Meter,
to measure surface resistance per IEC 61340-2-3, the test
method listed in Packaging Table 4 in EN 61340-5-1.
The Concentric Ring Probe can measure the volume
resistance of planar materials using a flat conductive metal
plate (not included).
The Concentric Ring Probe may be used for the resistance
measurements of ESD packaging including static shielding
and other bags.
Unit 17. Millbrook Business Park, Sybron Way • Crowborough, East Sussex TN6 3JZ United Kingdom
Phone: 00 44 (0) 1892-665313 • Internet: Charleswater.co.uk
Repeatability
Per IEC 61340-2-3 clause 10 “Repeatability and
reproducibility, the repeatability of these test methods can be
assumed to be in the range of approximately one half order
of magnitude. If the average value for a series of laboratory
tests is 5 x 1010 ohms, the spread of values can be expected
from 2.5 x 1010 ohms to 7.5 x 1010 ohms.”
Packaging
99028 Concentric Ring Probe
1 Concentric Ring Probe
1 BNC / Banana Jack Adapter
1 Certificate of Calibration
99120 Concentric Ring Probe Kit
1 Concentric Ring Probe
1 Carrying Case
1 BNC / Banana Jack Adapter
2 Banana Plug Test Leads
1 Certificate of Calibration
PPE-5076.E Page 1 of 2
August 2013
© 2013 Charleswater
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Operation
1. Connect the Concentric Ring Probe to a resistance
meter using the included BNC / banana jack adapter and
the meter’s test leads.
2. Place the material to be tested on an insulative surface.
3. Place the Concentric Ring Probe on top of the material
to be tested.
4. Take a resistance measurement using the resistance
meter.
Specifications
Weight 2.6 kg
Dimensions 7 cm diameter x 17 cm height
(with BNC / banana jack adapter)
Outer Probe Diameter 6 cm
Inner Probe Diameter 3 cm
Insulation Resistance
Between Probes >1 x 1012 ohms @ 500V
Probe Resistance of
Carbon Pads <100 ohms at low test voltage
Limited Warranty
Charleswater expressly warrants that for a period of one (1)
year from the date of purchase, Charleswater
Ring Probes
workmanship (labor). Within the warranty period, the product
will be tested, repaired or replaced at Charleswater’s option,
free of charge. Call Customer Service at 00 44 (0) 1892-665313
for a Return Material Authorisation (RMA) and for proper
shipping instructions and address. You should include a copy
of your original packing slip, invoice, or other proof of purchase
date. Any unit under warranty should be shipped prepaid to
the Charleswater factory. Warranty replacements will take
approximately two weeks.
will be free of defects in material (parts) and
Concentric
Figure 3. Using the Concentric Ring Probe with the
Charleswater Digital Surface Resistance Meter
Figure 4. Using the Concentric Ring Probe with the
Charleswater Analogue Surface Resistance Meter
Warranty Exclusions
THE FOREGOING EXPRESS WARRANTY IS MADE
IN LIEU OF ALL OTHER PRODUCT WARRANTIES,
EXPRESSED AND IMPLIED, INCLUDING
MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE WHICH ARE SPECIFICALLY DISCLAIMED.
The express warranty will not apply to defects or damage
due to accidents, neglect, misuse, alterations, operator
error, or failure to properly maintain, clean or repair
products.
Limit of Liability
In no event will Charleswater or any seller be responsible or
liable for any inury, loss or damage, direct or consequential,
arising out of the use of or the inability to use the product.
Before using, users shall determine the suitability of the
product for their intended use, and users assume all risk
and liability whatsoever in connection therewith.
PPE-5076.E Page 2 of 2
Unit 17. Millbrook Business Park, Sybron Way • Crowborough, East Sussex TN6 3JZ United Kingdom
Phone: 00 44 (0) 1892-665313 • Internet: Charleswater.co.uk
© 2013 Charleswater
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