MTP MTP-4010 User manual
MTP
Instruction Manual
DIGITAL INSULATION TESTER
INSTRUCTION MANUAL
Model MTP-4010
MTP Instruments
2
SAFETY INFORMATION
Read the following safety information carefully
before attempting to operate or service the
meter.
To avoid damages to the instrument, do not
apply the signals which exceed the maximum
limits shown in the technical specifications
tables.
Do not use the meter or test leads if they look
damaged. Use extreme caution when working
around bare conductors or bus bars.
Accidental contact with the conductor could
result in electric shock.
Use the meter only as specified in this manual;
otherwise, the protection provided by the meter
may be impaired.
Read the operating instructions before use and
follow all safety Information.
Caution when working with voltages above 60V
DC or 30V AC RMS. Such voltages pose a
shock hazard.
Before taking resistance measurements or
3
testing acoustic continuity, disconnect circuit
from main power supply and all loads from the
circuit.
Safety symbols:
Caution, refer to this manual before using
the meter.
Dangerous voltages
Meter is protected throughout by double
insulation or reinforced insulation.
When servicing, use only specified replacement
parts.
CE Comply with EN-61010-1
4
1. SPECIFICATIONS
1-1 General Information
Environment conditions:
①Installation Categories III
②Pollution Degree 2
③Altitude up to 2000 meters
④Indoor use only
⑤Relatively humidity 80% max.
⑥Operation Ambient temperature: 0~40ºC
Maintenance & Clearing:
①Repairs or servicing not covered in this
manual should only be performed by qualified
personnel.
②Periodically wipe the case with a dry cloth. Do not
use abrasives or solvents on this instrument.
Display: LargeLCD with dualdisplay
Measurement Range: 200Ω, 200kΩ, 200MΩ
/250V, 200MΩ/500V,
2000MΩ/1000V, 750V/ACV, 1000V/DCV.
Sampling Rate: 2.5 times per second.
Zero Adjustment: Automatic adjustment.
Over Range Indicator: Number 1 of highest digit is
5
displayed.
Low Battery Indication: The is displayed when
the battery voltage drops below the operating
voltage.
Operating Temperature:
0ºC to 40ºC (32ºF to 104ºF)
and Humidity below 80% RH
Storage Temperature:
-10ºC to 60ºC (14ºF to 140ºF)
and Humidity below 70% RH
Power source: DC9V (6x1.5V Size “AA” battery or
Equivalent)
Dimensions: 200(L) x 92(W) x 50(H) mm
Weight: Approx 700g include battery
Accessories: Test leads, 6pcs battery, carrying
case, manual.
6
1-2 Electrical Specifications
Accuracies are specified in the way:
±(…% of reading +…digits) at 23ºC±5ºC,below
80% RH.
OHMS
Range
Resolution
Accuracy
Max.
open
Circuit
Voltage
Overload
Protection
200Ω
0.1Ω
+(1%+2)
4.5V
250Vrms
200kΩ
0.1kΩ
3.0V
Continuity Beeper
Range
Resol
ution
Operation
Resistance
Max.open
Circuit
Voltage
Overload
Protectio
n
•)))
0.1Ω
Resistance≤
40Ω
4.5V
250Vrms
Short circuit
current
≥200mA
7
DC Voltage
Range
Resolution
Accuracy
Input
Impedance
Overload
Protection
1000V
1V
+(0.8%+3)
10MΩ
1000Vrms
AC Voltage (40Hz~400Hz)
Range
Resolution
Accuracy
Input
Impedance
Overload
Protection
750V
1V
+(1.2%+10)
10MΩ
750Vrms
Meg OHMS
Range
Resolution
Accuracy
Terminal
Voltage
200M
Ω/250V
0.1MΩ
+(3%+5)
250V
+10%~-0%
200M
Ω/500V
0.1MΩ
500V
+10%~-0%
0~1000M
Ω/1000V
1MΩ
1000V
+10%~-0%
1000~2000M
Ω/1000V
+(5%+5)
8
+
AA
BATT
BATT
200
TEST
200k
V1000
Ω
Ω
8
4
3
+
+
+
+
AA
AA
AA
+
AA
AA
750 V
Range
Test Current
Short circuit
current
200MΩ/250V
≥1mA
250KΩ(load)
≤1.5mA
200MΩ/500V
500 KΩ(load)
0~1000M
Ω/1000V
1MΩ
1000~2000MΩ
/1000V
2. PARTS & CONTROLS
①Digital Display
②Data Hold Button
③Lock Button
④Backlight Button
⑤Test Button
⑥Rotary Function switch
⑦V ΩJack
⑧COM input jack
⑨Pothook
⑩Battery Cover
9
3. BATTERY REPLACEMENT
3-1 How to connect test leads.
a). On MΩRange: Connect the red test lead into
the “V Ω” terminal and the black lead into the
“COM” terminal.
b) On 200Ωand ACV Range: Connect the red test
lead into the “V Ω” terminal and the black lead into
terminal “COM”
3-2 Battery Check-up & Replacement
a) As battery power is not sufficient. LCD will
display . Replacement of 6 pcs new
batteries, type 1.5V size “AA” is required.
b). Place back the battery cover and the screws.
3-3 Test leads check
Set the range select switch to the 200Ωrange.
With the tip and alligator clip of the test leads
connected, the indicator should read 00.0Ω. When
the leads are not connected, the display will read
infinity indicated by “1”. This will ensure that test
leads are under working condition.
10
4. INSULATION RESISTANCE MEASUREMENTS
a). Measurements at 200MΩ/250V. This is the
voltage used for the majority of insulation resistance
tests on normal installation requirement. To
measure insulation resistance, press the test button
to power on the tester. The LCD will display the
insulation resistance. Section VII indicates that
subdivision of large installations might be necessary
because of the large number of parallel insulation
resistance. In such a case, an installation may be
divided into sections, each being separately tested.
Each section must have not less than fifty outlets,
an outlet being a switch, socket, lighting point etc. A
switched socket counts as one outlet. The minimum
acceptable insulation resistance is 1MΩ. For a
large installation, the capacitance of the insulation
will be high, and it will take longer for it to become
charged by the direct testing voltage. Care must be
taken not to take a reading until there is a steady
reading, indicating that the charging process is
complete.
Note: The charge stored in the insulation will be
11
discharged automatically when the test button is
released. Be careful not to turn the range switch
knob while the test button is pressed, or the
instrument will be damaged.
b). Measurements at 2000MΩ/1000V
Some specifications require testing at 1000V. This
voltage must also be selected where the supply
voltage of the installation is between 500V and
1000V. First, set the range switch to 1000V and then
proceed as indicated in section 4a for 500V testing.
The above note also applies for testing at 1000V. In
addition the following applies.
Note: Make sure that the circuit under test does not
include components which will be damaged by the
1000V applied. Many normal components of an
installation are likely to be damaged if tested at
1000V. Examples are power factor correction
capacitors, low voltage mineral insulated cables,
electronic light dimmers, electronic ballasts and
starters for fluorescent lamps etc…
c). Lock power on Feature
12
For hands free operation, a lock power on feature is
incorporated on the press of the test button. Set
LOCK button to lock test voltage. Pressing it again
will turn the tester off.
5. LOW RESISTANCE (CONTINUITY)
MEASUREMENTS
a). Set the range switch to 200Ω.))) Position
b). Connect the red test lead to the V Ωterminal
and black to the COM terminal.
c). Connect the tips of the test leads to both ends of
the circuit under test and read resistance in Ωon
the LCD.
d). When the impedance on circuit is below
approximately 40, it will be indicates by a
continuous beeper.
6. AC/DC VOLTAGE MEASUREMENTS
a). Set the range switch toACV or DCV position
b). Connect red test lead to “V Ω” terminal and
black test lead to terminal “COM”.
b) Connect test prods of test leads IN PARALLEL
13
to the circuit being measured.
c) Read the voltage value on LCD.
7. POWER TOOLS AND SMALL APPLIANCES
This test would also apply to other similar
equipment that has a line cord. For double insulated
power tools, the megohmmeter lead shown
connected to the housing would be connected to
some metal part of the tool (e.g. chuck, blade).
Note: The switch of the device must be in the “ON”
position and the main power should be
disconnected.
MOTORS
AC-Disconnect the motor from the line by
disconnecting the wires at the motor terminals or by
opening the main switch. If the main switch is used
and the motor also has a starter, then the starter
must be held by some means in the “ON” position.
In the latter case, the measured resistance will
include the resistance of the motor, wire and all
other components between the motor and the main
14
switch. If a weakness is indicated, the motor and
other components should be checked individually. If
the motor is disconnected at the motor terminals,
connect one megohmmeter lead to the grounded
motor housing and the other lead to one of the
motor leads.
DC- Disconnect the motor from the line. To test the
brush rigging, field coils and armature, connect one
megohmmeter lead to the grounded motor housing
and the other lead to the brush on the commutator.
If the resistance measurement indicates a
weakness, raise the brushes off the commutator
and separately test the armature, field coils and
brush rigging by connecting one megohmmeter lead
to each of them individually, leaving the other
connected to the grounded motor housing. The
above also applies to DC generators.
15
CABLES
Disconnect the cable from the line. Also, disconnect
opposite end to avoid errors due to leakage from
other equipment. Check each conductor to ground
and /or lead sheath by connecting one
megohmmeter lead to a ground and /or lead sheath
and the other megohmmeter lead to each of the
conductors in turn. Check insulation resistance
between conductors by connecting megohmmeter
leads to conductors in pairs.
16
MTP Warranty
MTP Instruments warrants this instrument to be
free of defects in parts and workmanship for one
(1) year from date of shipment. This warranty does
not apply to defects resulting from action of the
user such as misuse, improper wiring, operation
outside of specification, improper maintenance or
repair, or unauthorized modification. MTP
Instruments specifically disclaims any implied
warranties or merchantability or fitness for a
specific purpose and will not be held liable for any
direct, indirect, incidental or consequential
damages. MTP Instruments total liability is
limited to repair or replacement of the product.
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