beautypg.com

Atec Megger-247000 Series User Manual

Atec Equipment

background image

247000 Series

Digital Low Resistance Ohmmeters

Resolution to 0.1 µ

on 599.9 µrange

Standard accuracy of ±0.25%

Digital readout

247000 Series

Digital Low Resistance Ohmmeters

DESCRIPTION

Digital Low Resistance Ohmmeters (DLRO

®

) are a family of

highly accurate instruments that provide a simple, practical
and reliable means of making low-resistance tests in the
field. They also are ideal for production quality control.

They operate on the four-wire measurement principle, thus
eliminating lead and contact resistances. With basic
accuracies of ±0.25% and resolution down to 0.1 µ

Ω, they

are nonetheless designed to be rugged and portable for
use at the job site. A variety of optional test leads and
calibration resistance standards are offered for use with
DLROs.

APPLICATIONS

Operation is simple: just connect the leads, turn the
instrument on and read the measurement directly from
the digital LED display. No warm-up is required.

Typical applications include measuring the resistance of:

Switch and circuit breaker contacts

Transformers and generators

Motor windings

Busbar and other joints

Aircraft, rail and pipe bonds

Cable splices, welds and fuses

Metal alloys

Graphite electrodes and other composites

Wire and cable

General-Purpose DLROs

Two models specially designed for general-purpose testing
applications are available.

Each provides up to 10 amperes of test current for
measuring resistances to 60 ohms with 1 µ

Ω resolution

and ±0.25% accuracy.

Dual-Pak General-Purpose Model, Cat No. 247000

This battery-powered unit features separate measuring and
charger modules for maximum portability. The charger can
be left in the shop, and the measuring module taken to
the job site.

It weighs less than 8 pounds (3.6 kg) and provides hours
of testing.

Single-Pak General-Purpose Model, Cat. No. 247001

This compact instrument packages measuring circuits,
rechargeable batteries and charger in one self-contained
unit.

Ruggedly built to handle the most demanding field
applications, the Single-Pak is housed in a tough Noryl

®

case with hinged, removable lid and carrying handle.
This model also includes captive wing nuts.

Single-Pak/Low-Range Model

Cat. No. 247002

This model provides an extra range, 0 to 599.9 µ

Ω, for

applications requiring 0.1 µ

Ω resolution. It also features a

current-reversing switch to average out any voltage offset
in the test sample. Captive wing nuts are also standard.