Amprobe MEGATEST-5000 Megohmmeter - Manual (Page 3)

1. ACCIDENT PREVENTION AND SAFETY MEASURES.................................................................................................... 2
1.1 D URING USE ....................................................................................................................................................................... 2
1.2 A FTER USE .......................................................................................................................................................................... 3
2 OVERVIEW............................................................................................................................................................................... 4
2.1 P URPOSE OF THE DEVICE ..................................................................................................................................................... 5
2.2 M EASURING PRINCIPLE ....................................................................................................................................................... 5
2.3 W HAT IS INSULATION RESISTANCE ...................................................................................................................................... 5
2.4 P OSSIBLE FIELDS OF APPLICATION ....................................................................................................................................... 5
2.4.1 Other possible fields of employment ....................................................................................................................... 6
2.5 U SE OF THE GUARD ............................................................................................................................................................. 6
2.6 N OTES ON INSULATION MEASUREMENTS .............................................................................................................................. 7
3 PREPARING THE INSTRUMENT FOR USE....................................................................................................................... 8
3.1 I NITIAL CHECKS .................................................................................................................................................................. 8
3.2 P OWER SUPPLY FOR THE INSTRUMENT ................................................................................................................................. 8
3.3 S TORAGE ............................................................................................................................................................................ 8
4 WORKING INSTRUCTIONS.................................................................................................................................................. 9
4.1 D ESCRIPTION OF THE INSTRUMENT ...................................................................................................................................... 9
4.2 D ISPLAY ........................................................................................................................................................................... 10
4.3 K EYBOARD ....................................................................................................................................................................... 11
4.4 S UMMARY OF THE MEASURING MODES .............................................................................................................................. 12
4.4.1 Factory-set configurations.................................................................................................................................... 13
4.4.2 Previously memorised configurations................................................................................................................... 14
4.4.3 Extemporaneous instrument configuration ........................................................................................................... 14
4.5 I NSTRUMENT CONFIGURATION AND MEASUREMENT PERFORMANCE ................................................................................... 15
4.5.1 Measurement preparation selection...................................................................................................................... 15
4.5.2 MAN Mode............................................................................................................................................................ 15
4.5.3 AUTO Mode.......................................................................................................................................................... 15
4.5.4 TIMER Mode ........................................................................................................................................................ 16
4.5.5 PROGR Mode ....................................................................................................................................................... 16
4.5.6 Measurement of polarization index....................................................................................................................... 17
4.6 E XAMPLES OF INSULATION MEASUREMENT ........................................................................................................................ 19
4.6.1 Measuring the insulation of the windings of an electrical machine...................................................................... 19
4.6.2 Measuring on a power plant ................................................................................................................................. 20
4.6.3 Checking the efficiency of an insulator................................................................................................................. 20
4.6.4 Estimating the insulating strength ........................................................................................................................ 21
4.7 S AVING THE MEASUREMENTS WHICH WERE PERFORMED .................................................................................................... 22
4.8 R ECALLING MEMORISED MEASUREMENTS .......................................................................................................................... 22
4.9 PRINTING OUT MEMORISED MEASUREMENTS ................................................................................................... 22
4.10 D ELETING MEMORISED MEMORIES ..................................................................................................................................... 23
4.11 R ESTORING THE INITIAL CONFIGURATION .......................................................................................................................... 23
4.12 E RROR CODE DESCRIPTION ................................................................................................................................................ 23
4.13 U SE OF THE SERIAL PORT ................................................................................................................................................... 24
4.13.1 Reading and downloading the results of the measurements on a computer.......................................................... 24
5 MAINTENANCE..................................................................................................................................................................... 25
5.1 R EPLACING THE BATTERIES ............................................................................................................................................... 25
5.2 C LEANING THE INSTRUMENT ............................................................................................................................................. 25
6 TECHNICAL SPECIFICATIONS......................................................................................................................................... 26
6.1 T ECHNICAL FEATURES ...................................................................................................................................................... 26
6.1.1 Measuring the insulation. ..................................................................................................................................... 26
6.1.2 Current which can be delivered ............................................................................................................................ 26
6.1.3 Voltage measurement............................................................................................................................................ 26
6.1.4 Safety .................................................................................................................................................................... 26
6.2 G ENERAL FEATURES ......................................................................................................................................................... 27
6.2.1 Electric features.................................................................................................................................................... 27
6.2.2 Safety .................................................................................................................................................................... 27
6.2.3 Mechanical features.............................................................................................................................................. 27
6.2.4 Power supply ........................................................................................................................................................ 27
6.2.5 Display.................................................................................................................................................................. 27
6.3 A MBIENT CONDITIONS ...................................................................................................................................................... 27
6.3.1 Ambient conditions of use ..................................................................................................................................... 27
6.3.2 EMC...................................................................................................................................................................... 27
6.4 S TANDARD EQUIPMENT ..................................................................................................................................................... 28
6.5 R EPLACEMENT PARTS ....................................................................................................................................................... 28
7 WARRANTY CONDITIONS................................................................................................................................................. 29
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