CharlesWater 99036 Installation guide
Unit 17. Millbrook Business Park, Sybron Way • Crowborough, East Sussex TN6 3JZ United Kingdom
Phone: 00 44 (0) 1892-665313 • Internet: Charleswater.co.uk
PPE-5105.E Page 1 of 4 © 2013 Charleswater
Low Resistance Tester
Operation and Maintenance
Description
Charleswater’s Low Resistance Tester is designed to
measure resistance of grounding paths of banana jacks,
common ground points, earth bonding points and other
equipment. Selectable Test Ranges: <1 ohm, <2 ohms and
<20 ohms allow the operator to test grounding conductors
per ANSI/ESD S6.1 – Grounding and ESD TR20.20. The
Tester is equipped with pass/fail (go/no go) audio and
visual indicators that activate to confirm that the grounding
conductor being tested meets the test range. The low
battery indicator lets the operator know when battery needs
to be replaced.
ESD Handbook ESD TR20.20 section 5.5.2.2 Electrical
Hand Tools
“All electrical tools and equipment used to process ESD
sensitive devices require the three prong, grounded-type AC
plug. The metal portions of the tool that touch the device
should have a low resistance (<2 ohms) to the equipment
ground terminal on the plug. In some cases, the user
may wish to verify that the metal portions of the tool have
acceptable voltage levels and leakage current. The tester
defined in ESD STM13.1 provides a means of checking
soldering iron tips while being used. Although the document
was written to make measurements on soldering and
desoldering equipment, the measurement techniques can be
used for other electrical hand tools. The working part of AC
powered tools should be capable of providing a conductive
path to ground. New powered hand tools such as soldering
irons typically should have a tip to ground resistance of less
than 1.0 ohm.
NOTE: This resistance may increase with use but should be
less than 20.0 ohms for verification purposes.”
August 2013
Figure 1. Charleswater 99036 Low Resistance Tester
ANSI/ESD S6.1 – Grounding
“6.4.1 The resistance of the conductor from the groundable
point ground of any ESD technical element (e.g. worksurface,
floor, chair, wrist strap, etc.) to the common point ground or
common connection point shall not be greater than 1 ohm.
Where a resistor is used in the grounding conductor, the total
resistance shall include the value of the resistor.
6.4.2 The resistance of the conductor from the common point
ground to the AC equipment ground shall not be greater than
1 ohm.”
Packaging
1 Low Resistance Tester
1
Threaded Banana Plug
1 Threaded Needle Point
1 Alligator Clip
1 Banana Plug / 10mm Snap Adapter
1 Certificate of Calibration
Features and Components
A. Selectable Test Ranges: Select the appropriate range
for required test <1 OHM, <2 OHMs, and <20 OHMs.
B. Test Button: Press and hold button to activate the tester.
C. Threaded Banana Plug/Needle Point: Standard Kit
includes a banana plug and needle point adapter.
D. Audio and Visual Test Indicators: LED and buzzer Pass
result.
Figure 2. Low Resistance Tester features and
components
A B C D E G
F
Made in the
United States of America
TECHNICAL BULLETIN PPE-5105.E
Unit 17. Millbrook Business Park, Sybron Way • Crowborough, East Sussex TN6 3JZ United Kingdom
Phone: 00 44 (0) 1892-665313 • Internet: Charleswater.co.uk
PPE-5105.E Page 2 of 4 © 2013 Charleswater
E. Low Battery LED: LED illuminates when the battery
needs to be replaced.
F. 6 Foot Coiled Cord: Insulation black colour PVC.
G. Banana Plug: Industrial Standard .175" (4.4 mm) Banana
Plug, fits banana jack ≥ .157".
Operation
USING THE TESTER
1. Use the slide switch to select a test range.
2. Connect the coiled cord’s banana plug end to known
ground. Use adapters where needed. NOTE: The
Charleswater Low Resistance Tester may be used with
an outlet polarity checker such as the Charleswater
99125 or 99126 to determine a known ground.
3. Connect or touch the tester end to a banana jack,
common ground point, earth bonding point or other
equipment that is being tested for resistance to ground.
4. Press and hold the test button.
5. An audio and visual indication will activate for a PASS
condition.
6. A FAIL condition is indicated when the buzzer does not
sound and the PASS LED does not illuminate. Example of Test Range Uses
<1 OHM Range
- ESD Technical element Grounding Conductors:
Banana Jacks, Common Ground Points, Earth Bonding
Points, Grounding Blocks, Mat Ground Cords
ANSI/ESD S6.1 Grounding, sections 6.4 Technical
Elements, 6.4.1, 6.4.2 and 6.4.3
- New AC Powered Hand Tools
ESD Handbook ESD TR20.20 section 5.5.2.2 Electrical
Hand Tools
<2 OHM
- Soldering Irons
ESD Handbook ESD TR20.20 section 5.5.2.2 Electrical
Hand Tools
- Other AC Powered Hand Tools
ESD Handbook ESD TR20.20 section 5.5.2.2 Electrical
Hand Tools
<20 OHM
- Soldering iron compliance verification
ESD Handbook ESD TR20.20 section 5.5.2.2 Electrical
Hand Tools
- Functional auxiliary grounds (ground rods)
ANSI/ESD S20.20*
* ANSI/ESD S20.20 requires <25 ohms from the
Auxiliary Ground to the Equipment Grounding Conductor.
Charleswater’s Low Resistance Tester only tests to <20
ohms. In cases of a no pass result with the Low Resistance
Tester when testing an Auxiliary Functional Ground, an
Ohmmeter should used to determine the actual resistance
from the Auxiliary Functional Ground to Protective Earth
Ground
Figure 3. Testing a soldering iron with the 99036 tester
Figure 4. Testing functional auxiliary ground with the
99036 tester
Unit 17. Millbrook Business Park, Sybron Way • Crowborough, East Sussex TN6 3JZ United Kingdom
Phone: 00 44 (0) 1892-665313 • Internet: Charleswater.co.uk
PPE-5105.E Page 3 of 4 © 2013 Charleswater
5. Re-assemble the tester.
Specifications
Output Voltage: 2.5 volts DC @ 10mA
Dimensions: 12 cm x 4.5 cm x 2 cm
Operating Temperature: 0° - 40°C
Calibration
The Low Resistance Tester is calibrated to standards
traceable to NIST. Frequency of recalibratrion should be
based on the critical nature of those ESD sensitive items
handled and the risk of failure for the ESD protective
equipment and materials. In general, we recommend that
calibration be performed annually.
Calibration is performed by placing various resistors between
the probe tip and the lead wire.
1. Attach the alligator clip to the lead wire.
2. Set the Low Resistance Tester to the 1 ohm test setting.
3. Attach the lead of a 1 ohm resistor to the alligator clip.
4. Firmly place the tester’s probe tip on the opposite resistor
lead.
5. Press and hold the test button. The PASS LED should
illuminate.
6. Repeat the procedure with a 1.2 ohm resistor. The PASS
LED should not illuminate.
7. Repeat this process with the ranges listed in the table
below. If the unit fails calibration, check and replace the
battery.
Test Range Setting PASS FAIL
1 ohm 0 to 1 ohm ≥ 1.2 ohms
2 ohms 0 to 2 ohms ≥ 2.2 ohms
20 ohms 0 to 20 ohms ≥ 22 ohms
Maintenance
BATTERY REPLACEMENT
1. Properly ground yourself using a wrist strap.
2. Remove the 2 screws located at the back of the tester.
Figure 5. Locating the enclosure screws
Figure 6. Removing the back cover
3. Remove and turn over the circuit board.
4. Locate and replace the battery (3 Volt; Model CR2032).
First, place
battery under
prongs
Next, press here to snap
battery in place
Figure 7. Replacing the battery
Unit 17. Millbrook Business Park, Sybron Way • Crowborough, East Sussex TN6 3JZ United Kingdom
Phone: 00 44 (0) 1892-665313 • Internet: Charleswater.co.uk
PPE-5105.E Page 4 of 4 © 2013 Charleswater
Limited Warranty
Charleswater expressly warrants that for a period of one (1) year from the date of purchase, Charleswater
Low Resistance Testers
will
be free of defects in material (parts) and workmanship (labor). Within the warranty period, the product will be tested, repaired or replaced
at Charleswater’s option, free of charge. Call Customer Service at 00 44 (0) 1892-665313 for a Return Material Authorisation (RMA) and
for proper shipping instructions and address. You should include a copy of your original packing slip, invoice, or other proof of purchase
date. Any unit under warranty should be shipped prepaid to the Charleswater factory. Warranty replacements will take approximately
two weeks.
Warranty Exclusions
THE FOREGOING EXPRESS WARRANTY IS MADE IN LIEU OF ALL OTHER PRODUCT WARRANTIES, EXPRESSED
AND IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE WHICH ARE
SPECIFICALLY DISCLAIMED. The express warranty will not apply to defects or damage due to accidents, neglect, misuse,
alterations, operator error, or failure to properly maintain, clean or repair products.
Limit of Liability
In no event will Charleswater or any seller be responsible or liable for any inury, loss or damage, direct or consequential,
arising out of the use of or the inability to use the product. Before using, users shall determine the suitability of the product for
their intended use, and users assume all risk and liability whatsoever in connection therewith.
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