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What is the purpose of Earth Tester? What is the purpose of Earth Tester? When some extraordinary cases occur, fault current and overcurrent may cause damages to equipment or a risk to humans because the equipment is not grounded. To prevent such risks, grounding plays and important role to assure safety. Grounding provides and escape way to electricity from and electric appliance through metal rod driven into the ground. After grounding works are performed to prevent hazards and assure safety, the earth resistance is measured. To measure the earth resistance, two grounding rods are stuck into the ground. How to Arrange grounding rods? Three-electrode method: Arrange the earth E and auxiliary grounding rods P and C in a straight line at intervals of about 5 to 10m * If they cannon be arranged in a straight line because of the presence of an obstacle, arrange E-P and E-C at angles of about 30 degrees or less. Two-electrode method: If an earth E whose grounding resistance is known is present nearby, the unknown groudning resistance can be measured by using it. Connect the terminal E of the earth resistance meter and the earth E by a cord. Measurements are taken between E and P / C assuming P and C terminals as one terminals. * The indicated value includes the knows resistance value of the earth E. Subtract the grounding resistance of E to obtain the true value. SANWA is a leading handheld manufacturer since 1941 supporting a wide range of products with a world-renowned Japanese quality. Our products have not only the basic functions required for multimeters, but also sophisticated and versatile features realized by our expertise in the software development and ergonomic design. The products we provide range from multimeters to advanced ones which can satisfy specific needs in measurements and recording, even in the field of opto-electronics. With our compact, yet high-performance and beautifully designed products, we hope to satisfy customers in the world.
Traceability: Traceability to prove the compliance with national and international standards is an essential factor for measuring instruments used as test instruments associated with quality assurance. Products of Sanwa are calibrated by reference samples which is periodically checked for its compliance with national standards.
Warranty: All our products come with 12 month manufacturers warranty, so buy with confidence. To request a quote, please contact us at info@bhumika.ca or at +1 (416) 930 2931 If you wish to discuss your application in detail, please contact us to help us understand your requirements and suggest the most appropriate model. All orders are to be
placed to:
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ISO
9001 Quality Assurance: In November 2002, SANWA ELECTRIC
INSTRUMENT CO., LTD. obtained ISO 9001 certification. (No.
JQA-1453). The certification is given by Japan Quality Assurance
Organization (JQA), which is an authorized member of IQNET, one of
the globally recognized quality assurance organizations. The
certification testifies to our compliance with the International
Quality Assurance Standard. 
CE
Marking: Some SANWA meters come with a CE marking. CE marking is
a safety mark which can be attached only on a product meeting the
safety requirements of the Directive of Council of European Union
(EC Directive). A product attached with the CE mark is designed so
as to meet the requirements of the "Low Voltage Directive" and the
"EMC Directive" of the EC Directive.