DESCO WEST
- 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178
DESCO EAST
- One Colgate Way, Canton, MA 02021-1407 • (781) 821-8370 • Website:
Desco.com
TB-3070
Page 2 of 3
© 2015 DESCO INDUSTRIES, INC.
Employee Owned
E. Low Battery LED:
LED illuminates when the battery
needs to be replaced.
F. 6 Foot Coiled Cord:
Insulation black color 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 coil cord banana plug end to known
ground. Use adapters where needed. NOTE: The
Desco Low Resistance Tester may be used with an
outlet polarity checker such as the Desco
19219
to
determine a known ground.
3. Connect or touch the tester end to a banana jack 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 does not illuminate.
Figure 3. Testing ground points with the
19249
tester
Example of Test Range Uses
<1 OHM Range
ESD Technical element Grounding Conductors:
Banana Jacks, 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
<10 OHM
Soldering iron verification
ESD Handbook ESD TR20.20 section 5.5.2.2
Electrical Hand Tools
Auxiliary grounds (ground rods)
ANSI/ESD S20.20*
*ANSI/ESD S20.20 requires <25 ohms from the
Auxiliary Ground to the Equipment Grounding
Conductor. The Desco Low Resistance Tester only
tests to <10 ohms. In cases of a no pass result with
the Low Resistance Tester when testing an Auxiliary
Ground, an Ohm meter should used to determine the
actual resistance from the Auxiliary Ground to the
Equipment Grounding Conductor.
Figure 4. Testing a soldering iron with the
19249
tester
Figure 5. Testing auxiliary ground with the
19249
tester
