Description - AEMC 3710 User Manual

Description

Outline
The ground resistance tester Models 3710 and 3730 measure ground rod
and small grid resistance through any season, without the use of auxiliary
ground rods. Clamp-on ground resistance testers are used in multi-
grounded systems without disconnecting the ground under test. The
Models 3710 and 3730 simply clamp around the ground conductor or rod
and measure the resistance to ground. By performing measurements on
intact ground systems, the user also verifies the quality of the grounding
connections and bonds. Resistance and continuity of grounding loops
around pads and buildings may also be measured.
Both models include a current measurement function. The probe's high
sensitivity enables measurement of leakage current flowing to ground or
circulating in ground loops down to 1 mA and neutral currents to 30 A
rms. This feature provides additional information which is becoming vital
as distribution ground networks carry higher levels of noise and
harmonics which affect power quality.
Both models offer battery life information at power-up and Auto-Off
for power management. Additional features are also displayed on the
large LCD to ensure precise measurements. The Buzzer and Auto-Off
features may be disabled from the push-buttons at any time.
The Model 3730 offers an Alarm function and a Memory (logging) func-
tion. In the Alarm mode, the probe will audibly and visually indicate if the
reading is beyond an input set point. The user may also have the Alarm
initiated above or below the set point. This Alarm feature permits quick
field checks where only "pass" or "fail" readings will suffice.
The Memory function logs up to 99 measurements (Ohms or Amperes).
This enables the user to conduct field surveys, and to retrieve and
analyze the readings at a later time. The alarm settings and stored
memory information are saved when the ground tester is turned off.
Product Construction
The Models 3710 and 3730 body cases are built of Lexan ® for rugged
use. The probe heads are encapsulated in a double-walled Lexan shell
®
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Ground Resistance Tester Models 3710/3730