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General| Brand | Electrical Test Instruments |
|---|---|
| Model | MAC-20 |
| Category | Controller |
| Language | English |
Crucial safety instructions to read the manual and understand unit operation before connecting to power.
Details the manual's scope and describes design updates and improvements in the MAC-20 over previous models.
Trademarks, introduction to high current test sets, and a general description of the MAC-20's features and capabilities.
Lists technical specifications including input power, current/timer ranges and accuracy, dimensions, and standard accessories.
Explains the general components and principles of high current test sets and the MAC-20's role in measurement and control.
Details MAC-20 circuitry, microprocessor core, software operation, interrupt service routine, and keyboard/display functions.
Describes the retrofit control panel's indicators: POWER ON, OUTPUT ON, and INTERLOCK ON, and the remote initiate jack.
Explains the MAC-20 control panel keys and displays for time, current, initiation, stop, reset, and modes like LATCH.
Details operation of LATCH, N.O., N.C., C.L. modes, PRESET, SECONDS, CYCLES, and MEMORY key operations.
Describes range selection keys, continuity lamp, contacts binding posts, and the serial port for data output.
Details internal parts like input connector, analog interface, motherboard, microprocessor core, and display board.
Details the REMOTE INITIATE jack, POWER ON, OUTPUT ON, and INTERLOCK ON indicators on the retrofit panel.
Lists required components, additional testing needs, and steps for installing the MAC-20 into the test set.
Details connecting cables, setting controls, power checks, and connecting the breaker under test.
Provides tips for accurate timing/current, contact modes, power application, range selection, and impedance management.
Details the procedure for performing a timing test on single pole molded case circuit breakers.
Explains testing instantaneous pickup and measuring instantaneous trip time for single pole circuit breakers.
Details timing tests, instantaneous pickup, and trip time measurements for multi-pole circuit breakers.
Covers testing low voltage power circuit breakers, including considerations for electronic trip types and ground fault.
Details the procedure for performing a Short Time Delay (STD) timing test on circuit breakers.
Explains testing instantaneous pickup and measuring instantaneous trip time for breaker units.
Details timing tests for motor overload relays, including current setting and control circuit connections.
Describes conducting a ratio test on current transformers using the test set and a bench ammeter.
Details recommended maintenance, calibration procedures, and factors affecting calibration accuracy.
Outlines specific steps for field calibration, including setting ranges, checking current latch, and pulse measurement.
Lists components for the MAC-20 unit and the Retrofit Panel, including quantity, description, vendor, and part number.
Details the limited one-year warranty for defects, exclusions, and liabilities.
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