Megger MIT525 User Manual

4
Table of contents and index
General description .................................................................5
Features ..................................................................................5
Preparations for Use ...............................................................7
Initial instructions .................................................................7
Power lead and battery charging .........................................7
Functional verification ..........................................................7
Calibration ...........................................................................7
Storage ................................................................................7
Operating Instructions .............................................................7
General operation ................................................................8
Breakdown vs. burn mode ...................................................9
Voltmeter .............................................................................9
Reset Default Settings .........................................................9
Instrument Control ...............................................................9
Initial setup ..................................................................... 10
Lock Voltage .................................................................. 10
Alarm setting .................................................................. 10
Recording temperature .................................................. 10
Breakdown mode / burn mode ....................................... 11
Running an insulation test .............................................. 11
Memory functions and downloading ............................... 12
Real-time output during insulation tests ......................... 13
PowerDB .............................................................................. 14
Interfacing MIT ranges to PowerDB ............................... 14
Import/Live Stream Control Application ........................ 15
Battery indicator .............................................................. 15
On screen error reporting ............................................... 16
Measurement Modes ......................................................... 17
‘Spot’ IR test .................................................................. 17
Timed IR test ................................................................. 17
DAR and PI Insulation Tests .......................................... 17
Dielectric Discharge test ................................................ 18
Step Voltage Test .......................................................... 19
Ramp voltage test .......................................................... 20
Measurement Techniques ................................................. 21
Understanding Measurement Currents .......................... 21
Insulation measurements above 100 GΩ ....................... 22
Terminals ...................................................................... 23
GUARD terminal, screened leads .................................. 23
Preventive Maintenance ....................................................... 24
Cleaning ........................................................................ 24
Care of the instrument ................................................... 24
Leads ............................................................................ 24
Battery Care .................................................................. 24
Replacing the battery..................................................... 24
MIT1525 battery replacement instructions: ...................... 25
Technical Specification ......................................................... 26
Electrical specification ....................................................... 26
Environmental Conditions ................................................. 28
GENERAL SPECIFICATION ............................................ 28
Repair and Warranty ............................................................ 29
Calibration, Service and Spare Parts ................................ 29
Returning product to Megger UK & USA service centres .. 29
Approved Service Centres ................................................ 30
Accessories, Equipment and Spares…………………………..31

Megger MIT525 Specifications

General

Short Circuit Current	3 mA
Operating Temperature	-20°C to +50°C
Storage Temperature	-25°C to +65°C
Weight	4.5 kg
Interface	USB
Safety Rating	CAT IV 600 V
IP Rating	IP65
Test Voltage	500 V, 1000 V, 2500 V, 5000 V
Display	LCD with backlight
Power Supply	Battery
Test Modes	PI, DAR, DD
Battery Type	Rechargeable Li-ion
Battery Life	6 hours continuous testing