The MEGGER CM500 Multi-function Installation Tester is a
compact instrument designed to perform all of the functions
required by the electrical contractor to fully test domestic,
commercial and industrial wiring. Specially designed to comply
with U.K., European and other International wiring regulations
and standards, the
CM500 may be used on all single and three
phase systems with rated voltages up to 300 Volts a.c. rms to
earth/ground.
Measured values are indicated on a large backlit analogue/digital
LCD and may also be stored in internal memory for later recall to
the display, direct printing via a standard serial printer, or
downloaded to a PC for storage, analysis and report generation.
The
CM500 is supplied as standard in a protective test and carry
case, and with the necessary mains plug lead and 2-wire lead set
required to commence testing. Optional accessories include the
SP2, a 2-wire lead set with test switch built into one of the probes
providing remote operation, and a 5 metre 2-wire lead set for
increased accessibility.
Key Features
•
No Trip loop Impedance test
• Storage of test results in memory
• Direct serial printer driver output
• RS-232 Output for PC storage
• Recall stored results to the display
• RCD Ramp test function
• Analogue arc and digital display.
• Selectable backlight
• Optional switchable probe (SP2)
Test Capability
• Insulation
Test voltages of 250V, 500V and 1000V.
• Continuity testing
Fast bleeper
Test lead resistance nulling
Automatic polarity reversal (
Setting A)
• Loop Testing
Operates regardless of mains polarity (Setting A)
Two wires only needed for testing
Automatic test start on voltage detection
Direct indication of short circuit current.
Phase - phase, phase - neutral & phase - earth tests
Simple earth electrode test
• RCD Tests
Tests selective (delayed) general and d.c. sensitive RCDs.
Two wires only needed for testing
Contact voltage and loop resistance displayed.
Selectable test current for programmable devices
• Supply voltage and frequency measurement
• Phase sequence indication
• Mains outlet polarity indication
Application
The CM500 may be be connected live to earth or between live
conductors of systems that have a rated voltage of 300V a.c. rms
to earth and an installation (overvoltage) Category
III or lower.
This means that the
CM500 may be connected to any fixed
wiring of a building installation, but not to primary supply circuits
such as overhead cables. To maintain user safety and ensure
accurate measurements, only use the test leads supplied or
General Description
6
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