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TB-6520

 March 2010 Page 1 of 7

Surface Resistance Test Kit 
Operation and Maintenance

Figure 1. Item 

50557

 Surface Resistance Test Kit

Description

The Surface Resistance Test Kit is a portable, accurate, 
and versatile battery operated instrument designed 
to measure resistance between two points (RTT) and 
resistance to ground (RTG) in accordance with ANSI/ESD 
S4.1 including:

•  Resistance measuring accuracy ± 10% 

 

(E11 & greater ±20%)

•  Resistance range <1.0 x 10E3 ohms to >10E12 ohms

•  Open circuit voltages of 10 and 100 volts ± 5%

•  Electrification period of 15 seconds

•  Electrodes (two) 5 pounds ± 2 oz with 50-70 durometer 

conductive pads

In addition, the Meter measures ambient temperature (in 
degrees Fahrenheit and Celsius) and relative humidity. 
Voltage set to “Auto”, will measure at 10 volt automatically 

switching to 100 volts if material being tested is >10E5 

ohms.  No switching test voltage is necessary.

The Surface Resistance Test Kit is referenced and 
designed to be used to make measurements in accordance 
with the test methods in:

•  Worksurfaces - ANSI/ESD S4.1 Worksurfaces 

•  Compliance Verification - ESD TR53 - Resistance 

Measurements

•  Floors - ANSI/ESD S7.1- Resistive

  Characterization of Materials Floor

  Materials

•  Footwear - ANSI/ESD S9.1 - Footwear - Resistiv

   Characterization

•  Garments - ANSI/ESD STM2.1 Garments

•  Seating - ANSI/ESD STM12.1- Seating - Resistive

  Measurement

•  Floor/Footwear - ANSI/ESD STM97.1 - Floor Materials

  and Footwear- Resistance Measurement in Combination

  with a Person

•  Workstations - ESD-ADV53.1 - ESD Protective

  Workstations

Versatility:

Measures RTT, RTG or Resistivity (requires optional 
Resistivity Attachment, item 

50560

)

• 

Quick Checks 

- Surface resistance exponent number 

illuminates immediately i.e. 8 = 10E8 ohms or 
100,000,000 ohms

• 

Compliance Verifications of Installed Products 

- Surface resistance exponent number illuminates 

immediately and displays Temperature and Relative 

Humidity during 15 second electrification period making 

numerous measure ments and calculations to then display 
mantissa i.e. if LED displays 8 and LCD displaying 7.14 

as mantissa = 7.14 x 10E8 ohms or 714,000,000 ohms

• 

Test Lab Evaluation of Product

 - Display same as 

Periodic Check above

The Surface Resistance Test Kit is NIST calibrated and 
items available are:

Made in America

© 2010 DESCO INDUSTRIES INC.

Employee Owned

 

Model 

Description 

Power

 

50557

  Surface Resistance Test Kit  2 x AA Batteries

 

50560

 

Resistivity Attachment 

N/A

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   5-pound electrodes

2   AA alkaline batteries
1  Certificate of Calibration

Properly store the Meter and component assemblies when 
not in use.

TECHNICAL BULLETIN TB-6520

EMIT

 - 3651 Walnut Avenue, Chino, CA 91710 • (909) 664-9980 • Fax (909) 627-7449 • Website: 

DescoEMIT.com

Содержание 50557

Страница 1: ...ting Resistive Measurement Floor Footwear ANSI ESD STM97 1 Floor Materials and Footwear Resistance Measurement in Combination with a Person Workstations ESD ADV53 1 ESD Protective Workstations Versati...

Страница 2: ...rees Celsius tolerance 3 C typical Humidity as percentage from 5 95 tolerance 10 typical Surface resistance mantissa with exponent displayed via illuminated LED measurement in ohms Measurement being d...

Страница 3: ...S4 1 Worksurfaces The test specimens and electrodes shall be cleaned twice with a minimum 70 isopropanol water solution using a clean low linting cloth each time Note then conditioned for 72 hours min...

Страница 4: ...ensitive devices shall also be removed The black sensing test lead with shielded plug should go to equipment ground or a groundable point Use one Electrode on other test lead and place Electrode the f...

Страница 5: ...hms RTT Surface Resistivity should measure 10E8 ohms square Ref ANSI ESD S11 11 section 12 0 Conversion to Resistivity states When it is appropriate to convert a resistance obtained by this test metho...

Страница 6: ...ses will act like an insulator to the Meter Meter will have to be stationary in testing area for about 2 hours with no significant temperature changes CALIBRATION TEST PROCEDURE When testing use only...

Страница 7: ...f your original packing slip invoice or other proof of date of purchase Any unit under warranty should be shipped prepaid to the EMIT factory Warranty replacements will take approximately two weeks If...

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