Transforming Technologies Ohm Metrics SRM330 User manual

Instruction Manual
Continuous Workstation Monitors
Model SRM330
Ohm Metrics™

Contents
1Description
SRM330 1
Ohm MetricsTM 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 MetricsTM Surface Resistance Meter: SRM330
The SRM330 is a digital surface resistance test kit designed to test all
conductive, anti-static and static dissipative surfaces for electrical re-
sistivity/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). Equipped
with built-in parallel electrodes for quick surface measurements and
two banana jacks for connection for two external probes. Included in
the kit are two “Press & Test” travel probes that similar the 5lbs of pres-
sure necessary for some measurements. Suitable for factory audits
and test lab evaluations.
Features include:
 10v and 100v range voltage selection
 Two “Press & Test” lightweight travel probes
 Built in resistivity probes
 Carrying case
The SRM330meets periodic test requirements per Compliance Verifi-
cation ESD TR53 and conforms to ANSI/EOS/ESD (S4.1, S7.1, S12.1,
S2.1).
About Ohm MetricsTM
Ohm MetricsTM test and measurement products are useful, reliable
tools for characterizing and identifying the electrical resistance of ma-
terials and the performance of personal grounding products.
 All Ohm MetricsTM products are designed to support ESDA Compli-
ance Verification TR53.
 All Ohm MetricsTM products can be calibrated.
 All Ohm MetricsTM test and measurement products are warranted
for 1 full year.

2
Features
A. Electrode banana Jacks.
B. Electrode toggle switch. Posi-
tion the switch to “Internal” to
measure using the built-in par-
allel probes on the back of me-
ter. Switch to “External” when
using one or two of the external
electrodes.
C. Readout LCD. Resistance is
displayed in Ohms and is read
as 10^X +1/2 decade where “X”
is the range illuminated on the
checker.
D. Test Button. Pres and hold un-
til the readout displays a meas-
urement.
E. Battery compartment. Remove
cover to insert battery.
F. Parallel Electrodes.
Parts Included
One - Surface Resistance Meter
Two - Travel Probes
Two - Test Leads
One - Metal Plate
One - Alligator Clip
Power Options
The SRM330 is powered by a 9 volt battery. Insert battery into
compartment on the back of meter.

3
Set Up
The SRM330 has two methods to measure resistivity: Parallel
Probe Resistivity (PPR) and Probe Resistivity (CRP) method. The
PPR method uses built in probes on the back of the SRM330 and
the CRP method uses two external probes attached to the meter by
lead wires.
Parallel Probe Resistivity Method
The PRP method is used to give fast electrical resistivity measure-
ments on flat materials.
Resistance Point-To-Point
Remove all items on surface that may interfere with the test.
1. Place the meter on the surface to be tested.
2. Move the toggle switch to “Internal”.
3. Press and hold the test button until measurement is displayed.
4. If measurement is outside acceptable limits, clean the surface
and re-test to determine if cause of failure is an insulative layer
of dirt/contamination or the surface of the material itself.
Note: Use only approved Anti-Static Mat Cleaner such as Trans-
forming Technologies StaticCareMT mat cleaner. Be sure the sur-
face is dry before testing.
The meter will keep updating the display while the button is held
down and will continue to display the last test reading for approxi-
mately 45 seconds after the button is released.

Probe Resistivity (CRP) method
The SRM330can take specific measurements: Resistance between
Two Points (RTT) and Surface to Ground Resistance (RTG). Proce-
dures vary regarding sample preparation, probe preparation and
spacing of the external probes. Select and read the correct test pro-
cedure for the desired measurement.
“Press & Test Travel Electrodes
The Press & Test Travel Electrodes can be substituted for the com-
mon 5lb external probes. To use the Press & Test probes, position
the probes in the intended test surface and press down on the
spring loaded probes. Have a 2nd person press the test button and
hold both the probes and the button until a the measurements are
displayed. The SRM330 can be used with 5lb probes as well.
Note: Ensure the material being tested is electrically isolated (placed
on an isulative surface) as the meter will measure the lowest resis-
tance path.
RTT test procedure
This procedure measures resistance between two points independ-
ent of a ground point.
1. Connect the plug ends of the test leads into the banana jacks of
the meter.
2. Connect the banana plugs of the test coil cords into the ends of
the external probes.
3. Switch the toggle switch to “External”.
4

5
RTT test procedure cont.
4. Place both probes on the material according to test procedures.
5. Placements of note may include the most commonly used por-
tion, most worn, center, and the furthest from the groundable
point.
6. Press and hold the test button until power is applied to the me-
ter 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.
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, at-
tach the alligator clip to one lead and the other to the one of the
external probe.
2. Attach the alligator clip to a known ground point.
3. Position the probe on the surface to be tested in accordance
with the desired test procedure.
4. Press the test button until the 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 resistance materi-
als be sure the test lead wires do not touch or overlap and that your

Product Number
SRM330 Resistance Meter with travel
probes, testing plate and
carrying case
Specifications:
Dimensions/Weight 5.8” H x 3.50” W x 1 D /
7.05 oz
Test range: 103-1012
Test voltage: 10V/100V
Accuracy + 5%
Power Supply 9V-Battery (PP3)
Probes: Two travel probes
Two 3”parallel probes
Read Out LCD
Test Range
Resistivity: 103-1012 ohms/sq.
Resistance: 103-1012 ohms
Accuracy + 1/2 decade
Service and Warranty
Transforming Technologies, LLC provides a limited warranty for the
Model SRM330. 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 evaluating, repairing or re-
placing) any product returned to Transforming Technologies. The com-
pany does not warrant 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.
Product Specifications
6
3719 King Rd | Toledo, OH 43617 | P: 419-841-9552 | F: 419-841-3241 | [e-mail]