Vermason TB-7545 Technical Bulletin

Surface Resistance Test Kit
Operation and Maintenance
Figure 1. Item 222630

Description

The Surface Resistance Test Kit is a portable, accurate,
and versatile instrument designed to measure point to point
resistance (Rp), resistance to ground (Rg), and surface
resistivity. It is designed to perform test methods described in
EN 61340-5-1 Annex A. Features include:
• Resistance measuring accuracy ± 10% (E11 and greater ±
20%)
• Resistance range <1.0 x 10E3 ohms to >10E12 ohms
• Open circuit voltages of 10 and 100
± 5%
• Electrification period of 15 seconds
• Electrodes 2.27 kilograms ± .06 kg with 50-70 durometer
conductive pads
In addition, the Meter measures ambient temperature and
relative humidity.
The Surface Resistance Test Kit (or its Meter) is referenced
and designed to be used to make measurements in
accordance with the test methods in EN 61340-5-1 Annex A
Resistance Measurement Test method:
• A. 1 Floor, working surface or storage rack working surface
• A.2 Seating
• A.3 Garments
• A.5.4 Gloves, finger cots and tools (Neither 20 mm plates
nor clip connectors provided)
Versatility:
Measures Rp, Rg or Resistivity (requires optional Resistivity
Attachment, item 222632)
• Quick Checks - Surface resistance exponent number
illuminates immediately i.e. 8 = 10E8 ohms or 100,000,000
ohms
• Periodic Audits of Installed Products - Surface resistance
exponent number illuminates immediately and displays
Temperature and Relative Humidity during 15 second
electrification period making numerous measurements and
calculations to the display mantissa i.e LED displays 8 and
LCD displaying 7.14 as mantissa = 7.14 x 10E8 ohms or
714,000,000 ohms
Phone: 0044 (0) 1462 672005, Fax: 0044 (0) 1462 670440 • E-mail: Service@Vermason.co.uk, Internet:
July 2012
TB-7545 Page 1 of 6
TECHNICAL BULLETIN TB-7545
Surface Resistance Test Kit
UNIT C, 4TH DIMENSION, FOURTH AVENUE, LETCHWORTH, HERTS, SG6 2TD UK
• Laboratory Test Evaluation of Product - Display same as
above Periodic Audit
The Surface Resistance Test Kit is NIST calibrated and is
available in two models:
Model Description
Surface Resistance Test Kit
222630
Meter and Attachment
222631
A pair of Test Leads (item 222633) can be bought
separately. The Vermason
can be purchased separately also.

Inspection

Remove the meter from the carton and inspect for damage.
Each Surface Resistance Test Kit should include the
following:
1 Protective carrying case
1 Meter
2 Test leads
2 2.27 kilogram electrodes
2 AA alkaline batteries
1 Certificate of NIST calibration
Properly store the Meter and component assemblies when
not in use.
ESD protective products should be tested:
A. Prior to installation to qualify for listing in user's ESD
control plan approved ESD protective materials (see EN
61340-5 paragraph 9.3.2 Qualified protective items)
B. During initial installation
C. For periodic audits of installed products as part of EN
61340-5-1 paragraph 9 Quality responsibilities
In addition: Per EN 61340-5-2 paragraph 9.4 "When a new
EPA is established, or an existing EPA is reconfigured, it
should be thoroughly checked by the ESD co-ordinator and a
certificate ... issued."

Electrification Period

The Surface Resistance Test Kit provides the proper
electrification period of 15 to 20 seconds per ESD EN
61340-5-1, after numerous readings and calculations
are executed, then displays surface resistance mantissa
measurement (Note: most analog type meters display
measurements instantaneously).
When the Test Button is depressed, the liquid crystal display
(LCD) will indicate:
• Temperature in degrees Fahrenheit (tolerance ±5°F,
typical)
• Temperature in degrees Celsius (tolerance ±3°C, typical)
Made in the
United States of America
replacement electrodes
222634
Vermason.co.uk
© 2012 VERMASON