Atec Biddle-DET3-2 - Manual (Page 2)

DET3 Contractor Series
Earth/Ground Resistance Testers
APPLICATIONS
Proper grounding provides many varied benefits to both
people and facilities. It lessens the chance of injury due to
faulty installation, reduces the likelihood of damage from
lightning strikes and induced voltages, improves the
performance of computer, communication and other
sensitive equipment and protects against static electricity
from friction. Over time, ground systems can degrade or
become ineffective.
Corrosion and weather influences exert mechanical strain
on ground rods and cause metallic corrosion. Catastrophic
events like lightning strikes or large fault currents can
cause instant degradation. In addition, facility expansion
can create different ground system needs.
The risks from ground system deterioration include
potentially deadly electrical shock situations, plant-wide
equipment damage, disruption in the performance of
sensitive equipment and heat build-up on a single piece of
electrical equipment.
The maintenance of an adequate low resistance ground
connection is essential to both the protection and
performance of any electrical system. Ground testing
should be performed both upon installation, to meet
design specification, and periodically thereafter in order to
maintain service. All models can also perform bonding
tests (using an ac signal), to determine that adequate
connection has been made from equipment to the
grounding system. Furthermore, the addition of a built-in
current clamp capability enables the testing of attached
grounds (ART) without lifting the utility connection.
Selection is easy. For basic requirements, DET3TD affords
ground testing and bond testing capabilities. Applications
to systems that have been connected to the utility feed are
simplified with model DET3TC, where a built-in clamp
input permits individual components of an expanded
system to be separately measured without extra
calculations.
Grounding electrodes from simple to complex systems can
be tested, including:
■ Primary and secondary electrical grounding systems
■ Utility pole grounds
■ Lightning protection systems
■ Residential grounds
■ Machinery safety grounds
■ Computer and communication system grounds
■ EMI/RFI system grounds
■ Antenna and pedestal grounds
■ CATV system grounds
FEATURES AND BENEFITS
■ Microprocessor control for improved error detection
■ Clear, unambiguous warnings and error indications
ensure the reliability of the reading and reduce test time
■ Simple to use, one touch operation improves efficiency
■ User selectable test voltage ensures that the units can be
used in agricultural environments
■ Rugged, weatherproof case to IP54 makes the units truly
outdoor instruments
■ Large, clear LCD that can be read in ambient lighting
■ Noise rejection to 40 V pk to pk allows accurate testing
in noisy environments
■ Testing kits and certificates supplied — everything
needed to start testing immediately
■ Accuracy of 2% of reading enhances reliability of
measurements
■ Clamp model for Attached Rod Technique allows the
testing of the rod without the need for disconnection.
■ Voltmeter function included allows you to measure the
ground voltage and enhances operator safety
■ CAT IV 100V provides increased operator safety in
outdoor environments
Model DET3TC shown performing the classic fall-of-potential test method.