Surface Resistance Tester

SURPA -9802

Measuring resistivity/resistance,temperature and humidity.

Humidity and temperature affect resistivity so they must be measured.

Measuring Resistivity:10³-10¹² ohms/sq.

Measuring Resistance: 10³-10¹² ohms

Measuring Relative Humididty:10% to 90%RH

Measuring Temperature:0·C-37.7·C(32·F to 100·F )

10v/100v test voltage range

 Including probes:-- two 5 pound weight,2.5”RTT,RTG disk probes

                         -- two 3”parallel surface resistivity probes

 LCD alphanumeric scale-no LED’S

 Rechargeable battery capability

Test mats,floor finishes,paints,wrist straps,smocks,foot wear,bags and containers

SURPA -9802 Megohmmeter is designed to test all conductive ,anti-static

and static dissipative surfaces for electrical resistivity/resistance

According to EOS/ESD,CECC,ANSI,ASTM test procedures.It’s easy to use and is of high quality and dependability.The meter also measures relative humididty and temperature,both of which affect electrical properties.

Feautures:

      ☆Measuring resistivity,temperature and humidity

      ☆10³-10¹² ohms/sq test ranges

      ☆10v/100v test ranges

      ☆Blow molded travel case

      ☆Light weight meter-15oz.

      ☆Alpha-numeric LCD scale

      ☆Automatic power shut off

      ☆Auto zeroing

      ☆Two 5 lb.disk probes and built- in resistivity probes

      ☆One year warranty

      ☆Replaceable probes

      ☆9 volt DC battery or 120 volt AC adapter

      ☆Clean-room probes available

      ☆Concentric ring resistivity probe(optional)

      ☆Operation  Instructons.

Operation:

Before testing ,please make sure that surfaces to be tested are clean and free of contaminants.

Parallel Probe Resistivity Method

The parallel resistivity probe method,which complies with EOS/ESD-S11.11-1993.It is used to give fast electrical resistivity measurements on flat homogeneous materials.It may be used on multilayered materials,but this should be noted along with the temperature and humidity value on the data report.

A.  Place the meter on the requested surface to be tested.

B.   Move switch to desired test voltage position,either 10 or 100 volts.

C.  Press and hold the test button with approximately 5 pounds of applied force.After the meter has had time to measure the resistivity,humidity and temperature these values will be displayed on the LCD screen.This will happen in approximately 15 seconds.

The resistivity reading will be in ohms per square inch,temperature in centigrade,and relative humidity in percent.

The meter will keep updating the display while the button is held down and will continue to display the last test reading for approximately 45 seconds after the button is released.

Concentric Ring Probe Resistivity Method

(Concentric Ring Probe is an optional part)

Insert both coils using the monaural plugs into the 3.5mm meter jacks.Attach the banana plug coil cord terminations to the concentric ring probe.

Place the probe on the surface to be tested.Press the test button and wait 15 seconds.The correct temperature and humidity will be displayed on the LCD screen.The resistivity value displayed must be multiplied by a factor of ten to achieve the actual test value.These values will read in ohms/square.e.g.3.5x10⁴ ohms/square(displayed value).

Actual resistivity value will be 3.5x10⁵ ohms/square.

Resistance Between Two Points(RTT)

This procedure complies with EOS/ESD S4.1which measures resistance between two points independent of a ground point.Procedures vary regarding sample preparation,

Probe preparation and spacing of the 5 pound probes.Select and read the correct test

Procedure for the desired measurement.

A.      Connect the monaural plug ends of the test leads into the 3.5mm jacks of the meter.

Connect the banana plugs of the test coil cords into the 2.5 inch disc ends of the 5 pound probes.

B.      Place both probes on the material according to test procedures.

C.      Move switch to desired test voltage position,either 10 or 100 V.

D.      Press and hold the test button until power is applied to the meter and a value is

Displayed.Keep the button depressed with sufficient force until the electrical resistance.Relative humidity and temperature readings are displayed on the meter screen.

Surface –to-Ground Resistance Measurement(RTG)

This procedure measures the surface resistance between a ground point on the material surface and specific positions on the material being tested.This procedure complies with the EOS/ESD S4.1 standard.

1. Meter set-up:With both test leads connected to the meter,attach the alligator clip to one lead and the other to the 2.5” disc end of one 5 pound probe.

2. Attach the alligator clip to a known ground point.Position the probe on the surface to be tested in accordance with the desired test procedure.

3. Press the test button until the resistivity,humidity and temperature test values are displayed on the LCD screen.These readings will conform to:EIA,EOS/ESD ANSI,IEC-93 CECC and ASTM test procedures.When performing test,especially With high resistance materials ,be sure the test lead wires do not touch or overlap and that your hands are not tin contact with the probes or wires during the actual Testing of the materials.This will ensure accurate readings.

Specifications:

Accuracy for 10 volt scale:

10e3-10e4+/-9%@RH<90%

10e4-10e8+/-5%@RH<90%

10e8-10e9+/-9%@RH<90%

10e9-10e10+/-25%@RH<60%

Accuracy for 100 volt scale:

      10e6-10e8+/-5%@RH<90%

      10e9-10e10+/-9%@RH<60%

      10e10-10e11+/-15%@RH<50%

      10e11-10e12+/-25%@RH<40%