Transforming Technologies Ohm Metrics SRM500K User manual

Instruction Manual
Surface Resistance Testing Kit
Model SRM500K
Ohm Metrics™

Contents
1Description
SRM500K 1
Ohm Metrics 2
2Operation
Power Option 2
Set Up 2
Parallel Probe Resistivity Testing 3
Probe Resistivity Testing 4
Resistance Between Two Points (RTT) 4
Surface to Ground Resistance (RTG) 5
3Specifications 6
4Service and Warranty 8

1
Description
Ohm Metrics Surface Resistance Meter:
SRM 500K
The SRM500K is a digital surface resistance test kit designed
to test all conductive, anti-static and static dissipative sur-
faces for electrical resistivity/resistance according to EOS/
ESD, CECC, ANSI, ASTM test procedures. It accurately and
quickly measures resistance between two points (RTT) and
surface to ground resistance (RTG). Suitable for factory au-
dits and test lab evaluations, the Ohm Metrics SRM500K also
measures ambient temperature and humidity.
Features include:
 10v and 100v range voltage selection
 Automatic zeroing and power shut off
 Two 5 lb disk probes
 Built in resistivity probes
 Carrying case
The SRM500k meets periodic test requirements per Compli-
ance Verification ESD TR53 and conforms to ANSI/EOS/ESD
(S4.1, S7.1, S12.1, S2.1).

2
About Ohm Metrics
Ohm Metrics test and measurement products,
from Transforming Technologies, are useful, reliable
tools for characterizing and identifying the electrical re-
sistance of materials and the performance of personal
grounding products.
 All Ohm Metrics products are designed to support
ESDA Compliance Verification TR53.
 All Ohm Metrics products can be calibrated.
 All Ohm Metrics test and measurement products are
warranted for 1 full year.
Power Options
The SRM500K can be powered by a 9 volt battery or by
the included 120 volt AC adapter.
Set Up
The SRM500K has two methods to measure resistivity:
Parallel Probe Resistivity (PPR) method and Probe Resis-
tivity (CRP) method. The PPR method uses built in
probes on the back of the SRM500 and the CRP method
uses two 5 lb probes attached to the meter by lead
wires.

Parallel Probe Resistivity Method
The PRP method is used to give fast electrical resistivity
measurements on flat homogeneous materials. Parallel
probes are mounted on the back of the SRM500.
Note: It may be used on multilayered materials, but this
should be noted along with the temperature and humidity
value on the data report.
Make sure that surfaces to be tested are clean and free of
contaminants.
1. Place the meter on the surface to be tested.
2. Move the switch to desired test voltage position, either
10 or 100 volts.
3. Press and hold the test button. After approximately 15
seconds, the meter will display the resistivity, humidity
and temperature on the LCD screen.
The resistivity reading will be in ohms per square, tem-
perature 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 read-
ing for approximately 45 seconds after the button is re-
leased.
3

Specific Measurements
The SRM500K can take specific measurements: Resistance
between Two Points (RTT) and Surface to Ground Resis-
tance (RTG). Procedures vary regarding sample prepara-
tion, probe preparation and spacing of the 5 pound probes.
Select and read the correct test procedure for the desired
measurement.
RTT test procedure
This procedure measures resistance between two points in-
dependent of a ground point.
1. Connect the plug ends of the test leads into the 3.5mm
jacks of the meter.
2. Connect the banana plugs of the test coil cords into the
ends of the 5 pound probes.
3. Place both probes on the material according to test pro-
cedures.
4. Move switch to desired test voltage position, either 10
or 100 V.
5. Press and hold the test button until power is applied to
the meter and a value is displayed. Keep the button de-
pressed with sufficient force until the electrical resis-
tance. Relative humidity and temperature readings are
displayed on the meter screen.
4

5
RTG test method
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 one of the 5lb probe.
2. Attach the alligator clip to a known ground point.
3. Position the probe on the surface to be tested in accor-
dance with the desired test procedure.
4. Press the test button until the resistivity, humidity and
temperature test values are displayed on the LCD
screen.
5. These readings will conform to: EIA, EOS/ESD ANSI,
IEC-93 CECC and ASTM test procedures.
Note: When performing test, especially with high resis-
tance materials be sure the test lead wires do not touch or
overlap and that your hands are not in contact with the
probes or wires during the actual testing of the materials.
This will ensure accurate readings.

Product Number
SRM500K Resistance Meter with 5lb
disk probes and
carrying case
Specifications:
Dimensions/Weight 5.15” H x 2.50” W x 1.8” D /
8.46 oz
Test range: 103-1012
Test voltage: 10V/100V(automatic ranging)
Power Supply 9V-Battery (PP3)
120 volt AC Adapter
Unit automatically powers off
when not in use
Probes: Two 5 pound disk probes
Two 3”parallel surface resistivity
probes
Read Out LCD alpha-numeric scale-no
LED’S
Warranty One Year
Test Range
Resistivity: 103-1012 ohms/sq.
Resistance: 103-1012 ohms
Relative humidity: 10% to 90%RH
Temperature: 0℃-37.7℃(32℉to 100℉)
Product Specifications
6

7
Specifications Continued
Accuracy for 10 volt scale:
10e3-10e8+/-10% @RH<90%
10e8-10e12+/-20% @RH<90%
Accuracy for 100 volt scale:
10e3-10e8+/-10% @RH<90%
10e9-10e12+/-20% @RH<60%

Service and Warranty
Transforming Technologies, LLC provides a limited
warranty for the Model SRM500K. All new products are
guaranteed to be free from defects in material and
workmanship for a period of one (1) year from the date
of shipment. Liability is limited to servicing (after evalu-
ating, repairing or replacing) any product returned to
Transforming Technologies. The company does not war-
rant damage due to misuse, neglect, alteration or acci-
dent. In no event shall Transforming Technologies be
liable for collateral or consequential damages.
To receive service under warranty, please contact
Transforming Technologies Technical Support.
8

About Transforming Technologies
Since 1998, Transforming Technologies has helped
electronic manufacturing facilities to protect their prod-
ucts and processes from the many serious problems as-
sociated with static electricity.
Transforming Technologies offers a wide range of
unique and outstanding products to detect, protect,
eliminate and monitor electrostatic charges. Our prod-
ucts are integral components of an effective static con-
trol program.
9

3719 King Rd | Toledo, OH 43617 | P: 419-841-9552 | F: 419-841-3241 | [e-mail]