MEGATEST 5000
5000 V MEGOHMMETER
Model#: AMB-5 KVD
Owner’s Manual
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
1.
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
-1-
1. Accident prevention and safety measures
Please read and understand these instructions BEFORE using the AMB-5KV-D.
This instrument can generate dangerously high voltages.
Only specialised personnel, well trained about electricity and its effects must use it.
When testing, the following is important:
•
DO NOT TAKE MEASUREMENTS IN AN EXPLOSIVE ATMOSPHERE. i.e. GAS,
FUELS OR DUST.
•
Do not take measurements in wet environments
•
Do not touch exposed metal parts; i.e. alligator clips, ends of test leads, circuits, etc.,
while taking measurements
•
Prevent any accidental contact of yourself or others with the measuring voltage.
•
Make sure the test voltage does not damage any component unable to withstand it.
The following symbols have been used in this manual:
o
p
t
Warning: comply with the instructions in the manual. Any improper use could
damage the instrument, the equipment being tested or cause personnel
injury.
Danger High Voltage.
Instrument with double insulation.
1.1 During use
Following are two general guidelines for setting up the tests. These must be integrated
from time to time with a detailed analysis depending on the actual circumstances.
While measuring on equipment:
-
Seal off the testing area and do not allow other people to approach it. If
necessary, put up a sign.
-
Have enough room available, plus properly insulated tables or supports.
-
Take note of which parts could be live should there be defective insulation.
-
Keep the area and the measuring cables clean from dust, oil or other foreign
matter.
-
On a routine basis, check for any abrasion or breakage on the measuring
cables.
-
Never exceed the maximum testing voltage for which the tested device was built
and/or rated.
-2-
When measuring insulation:
-
Cut power off from the installation before preparing for the tests.
-
Seal off the testing area and do not allow other people to approach it throughout
the duration of the tests.
-
Seal off the installation being tested, disconnecting those branches of it which
are not involved in the test.
-
When measuring a section, make sure the test leads are at least 1 “ (25 mm)
apart in order to avoid discharges or unwanted coupling.
-
Isolate areas not involved, so unwanted voltages do not reach them.
-
Take note of which parts could be live should there be defective insulation.
-
Never exceed the maximum insulation voltage the installation was built for.
-
Disconnect from the installation any equipment (transformers, bells, intercom
systems, antenna systems, pumps, timers, lights…) which might be damaged by
the measuring or might make it less reliable.
WARNING
p
Danger due to capacitance. Measuring over a very large installation or on
condensers can lead to a dangerous accumulation of power. Always wait for
the voltage to go back to zero before disconnecting the instrument.
1.2 After use
•
Once measuring has been completed, press the OFF key to turn the instrument off.
•
If you expect not to use the instrument for a long period of time, take the batteries out.
-3-
