Mitchell MIT6501 Manuale utente
5kV HIGH VOLTAGE
INSULATION TESTER
INSTRUCTION MANUAL
Index
1. Safety Precautions..................................................
2. Overview.................................................................
3. Features..................................................................
4. Specications..........................................................
5. Connections............................................................
6. Instrument layout....................................................
7. Measuring procedure..............................................
8. Charge....................................................................
9. Maintenance & repair..............................................
10. Interface connection and operation.......................
Page
1-2
2
3
4
5
6
7-14
15
16
17-24
-1-
1. Safety Precautions
Electricity can cause severe injuries even with low voltages or
currents.
Therefore it is extremely important that you read the following
information before using your high voltage insulation tester.
a. This Instrument must only be used and operated by a
competent trained person and in strict accordance with the
instructions. we will not accept liability for any damage or injury
caused by misuse or non compliance with instructions and
safety procedures.
b. This instrument must not be used on live circuits. Ensure
all circuits are de-energised before testing. see paragraph
for details of built-in warning features should your high
voltage insulation tester be connected to a live system.
c. Always inspect your high voltage insulation tester and test
leads before use for any sign of abnormality or damage. If any
abnormal conditions exist (broken test leads, cracked case,
display faulty etc...) do not attempt to take any measurement
or use the tester. Return your high voltage insulation tester to
your nearest distributor for service.
d. Your high voltage insulation tester has been designed with
your safety in mind. However, no design can completely
protect against incorrect use. Electrical circuits can be
dangerous and / or lethal when a lack of caution or poor safety
practice is used.
e. Pay attention to cautions and warnings which will inform you of
potentially dangerous procedures.
f. Your high voltage insulation tester has a live circuit warning
beeper. If it is connected to a live circuit, a rapid pulsating
bleep will be heard. DO NOT proceed to test and immediately
disconnect the instrument from the circuit. In addition your
tester will display the warning message.
-2-
g. Rated environmental conditions :
(1) Indoor use.
(2) Installation Category Ⅳ.
(3) Pollution Degree 2.
(4) Altitude up to 2000 meters.
(5) Relative humidity 80% max.
(6) Ambient temperature 0ºC~40ºC.
h. Observe the international Electrical Symbols listed below :
Meter is protected throughout by double insulation or
reinforced insulation.
Warning ! Risk of electric shock.
Caution ! Refer to this manual before using the meter.
Earth
2. Overview
This is a 5kV high voltage insulation tester which has output
voltages of 500V, 1000V, 2500V, 5000V.
The top line of the display shows the elapsed time at the start
of the test. Digital readout of the total time will remain displayed
even after testing has ceased.
This instrument displays a voltage warning and sounds when AC
or DC is present before injecting the test voltage.
-3-
3. Features
●High contrast OLED display
●Microprocessor-controlled
●Tests insulation resistance up to 10 TΩ
●4 Insulation test voltages:
500V, 1000V, 2500V, 5000V
●AC/DC Voltmeter
●Short-circuit current up to 5mA
●PI (Polarization Index) indication
●DAR (Dielectric Absorption Ratio) indication
●Auto-ranging on all insulation ranges
●Optical USB to RS-232 data transmission
●Well isolated from contact
●Well protected from surges
●2 built-in optical LEDs for data transfer
●Visual and audio warning of external voltage presence
(≥30Vac or ≥30Vdc)
●Auto-hold function to freeze reading
●Overload protection
●Adjustable testing duration: 1~30 minutes
●Internal memory for data storage
●Displays testing duration for insulation measurement
●Auto-off function
●200 measurement results can be saved in memory and
recalled on display
-4-
4. Specications
Test Voltage 500V, 1000V, 2500V, 5000V
Insulation resistance
1TΩ / 500V
2TΩ / 1000V
5TΩ / 2500V
10TΩ / 5000V
Accuracy
0~100GΩ / 500V
0~200GΩ / 1000V
0~500GΩ / 2500V
0~1000GΩ / 5000V
±(5.0%rdg + 5dgt)
100G~1TΩ / 500V
200G~2TΩ / 1000V
500G~5TΩ / 2500V
1000G~10TΩ / 5000V ±12%rdg
Resolution
1000MΩ: 1MΩ
10GΩ: 0.01GΩ
100GΩ: 0.1GΩ
1TΩ: 1GΩ
10TΩ: 10GΩ
Short circuit current up to 5mA
PI (Polarization Index) √
DAR (Dielectric Absorption Ratio) √
Voltmeter ACV: 30~600V
DCV: 30~600V
Accuracy: ±(2.0%rdg + 3dgt)
Resolution: 1V
Current measurement 0.5nA ~ 0.55mA
(Depending on the insulation resistance)
Power source Rechargeable battery
Adapter Input: 100-240Vac, 0.4A, 50-60Hz
Output: 24Vdc, 0.62A
Dimensions 330(L) × 260(W) × 160(D)mm
Weight Approx. 3760g
Safety standard EN 61010-1 CAT IV 600V
EN 61010-2-030 EN 61326-1
Accessories Instruction manual Test leads
Data transmission cable CA-232
Compact disk (CD) for PC interface
Alligator clip Charger Test report
-5-
5. Connections
FIRST MEASUREMENT
MEASURE WITHOUT THE GUARD TO TAKE EVERYTHING INTO
ACCOUNTAND FIND OUT IF NEED CLEANING.
RESISTANCE DUE TO CONTAMINATION
CAN BE VERY LOW AND LOWER THE
TOTAL RESISTANCE.
CLEANING PERIODICALLY CAN ALSO
REDUCE SYSTEM POWER CONSUMPTION.
SECOND MEASUREMENT
MEASURE WITH THE
GUARD TO ENSURE
INSULATOR IS CORRECT.
TYPICAL TEST
DIRTY
INSULATOR ELECTRICAL EQUIVALENT
CIRCUIT DIRTY INSULATOR
-6-
6. Instrument layout
①High contrast OLED display ⑨ENTER / SAVE button
②+HV terminal ⑩ TEST / STOP button
③GUARD terminal ⑪ Function rotary switch
④-HV terminal ⑫ Connection socket for
⑤ESC button data transmission
⑥SELECT button ⑬ Battery-charge socket
⑦" " button ⑭ LED charge indicator
⑧" " button
5kV HIGH VOLTAGE
INSULATION TESTER
④
⑧
⑩
⑪
⑥
①
⑨⑫
②
③
⑦
⑤
⑬ ⑭
-7-
7. Measuring procedure
This tester provide ve main functions and four minor functions:
Main Functions:
1. 500V voltage insulation resistance test.
2. 1kV voltage insulation resistance test.
3. 2.5kV voltage insulation resistance test.
4. 5kV voltage insulation resistance test.
5. AC/DC voltage measurement.
Minor functions:
Function 1 ─ Date/time adjustment.
Function 2 ─ Measurement time setting.
Function 3 ─ Display data stored.
Function 4 ─ Delete data stored.
(A) Insulation resistance measurement test (main function)
Note:
1. Before test performed, be sure that no voltage is made
on the specimen. If voltage exists therein, remove the
power supplied.
2. To secure operator’s safety, check if there is any damage
on the tester or test cable.
3. During the test, do not touch the metal on the specimen
surface or test cable.
4. Wear insulation gloves and rubber shoes while operating
this high-voltage measuring instrument.
(a) Checks before test is performed:
Press the power switch and check if power supply is
sufcient? If insufcient, "Low Battery" will be displayed
on the LCD display. Charge the battery before making
measurement.
-8-
(b) Measuring procedure:
1. Connect specimen by test cable.
2. Switch ⑪the function rotary switch to turn on power
and select test voltage from 500V, 1kV, 2.5kV or 5kV,
respectively.
3. Be sure that the cable connecting the specimen, if there
is a exterior voltage (above AC30V or DC30V) exerted,
beeper activates in response; and LCD displays
the warning picture as shown in the AC/DC voltage
measurement function:
Now, test cannot be performed. To go on the test it
should remove the exterior voltage.
4. Then, press ⑩TEST / STOP button to test.
(1) Rotate another angle to lock ⑩TEST / STOP button
for testing continuously.
(2) While test is running, beeper activates to remind
operator that test is underway.
(3) After the set test time is due (see Function 2: the
test time setting), test stops and system will
automatically lock down the test value.
(4) To read the test value on the LCD display
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