Megger MET1000 User manual

MET1000
All in One True RMS Electrical Tester
User Guide
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www.weschler.com [e-mail]
WESCHLER INSTRUMENTS
Authorized Distributor:

Megger Ltd reserves the right to alter the specification of its products from time to time
without notice. Although every effort is made to ensure the accuracy of the information
contained within this document it is not warranted or represented by Megger Ltd. to be
a complete and up - to - date description.
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English

Declaration of Conformity
Hereby, Megger Instruments Limited declares that radio equipment manufactured by
Megger Instruments Limited described in this user guide is in compliance with Directive
2014/53/EU. Other equipment manufactured by Megger Instruments Limited described
in this user guide is in compliance with Directives 2014/30/EU and 2014/35/EU where
they apply.
This manual supersedes all previous issues of this manual. Please ensure that you are
using the most recent issue of this document. Destroy any copies that are of an older
issue.
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Safety Information
To ensure safe operation and service of the meter, follow these instructions.
Failure to observe warnings can result in severe injury or death.
If the equipment is used in a manner not specified by the manufacturer, the
protection provided by the equipment may be impaired.
Always use the proper terminals, switch position, and range for measurements.
Ensure hands are kept behind the barrier / hand guard when making
measurements
To reduce the risk of fire or electric shock, do not use this product around explosive
gas or in damp locations.
Verify the Meter operation by measuring a known voltage. If in doubt, have the
meter calibrated.
Do not apply more than the rated voltage, as marked on meter, between terminals
or between any terminal and earth.
Avoid working alone.
Do not use the tester if the tester is not operating properly or if it is wet.
Personal protective equipment must be used if hazardous live parts in the
installation where the measurement is to be carried out could be accessible.
Use caution with voltages above 30 VAC rms, 42 VAC peak, or 60 VDC. These
voltages pose a shock hazard.
DO NOT USE the test leads if the internal white insulation layer becomes exposed.
DO NOT USE the test leads for voltage or current measurement in any environment
above the safety CAT rating printed on the probe or probe tip guard cap
DO NOT USE the test leads without the probe tip guard cap in CAT III or CAT IV
environments.
Probe assemblies to be used for mains measurements shall be rated as appropriate
for measurement Category III or IV according to IEC 61010-031 and shall have a
voltage rating of at least the voltage of the circuit to be measured.
Disconnect circuit power and discharge all high-voltage capacitors before testing
resistance, continuity.
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Safety Information

Symbols as marked on the Meter and Instruction manual
Symbol Explanation
Risk of electric shock
See instruction manual
DC measurement
AC measurement
Both direct and alternating current
Equipment protected by double or reinforced insulation
Battery
Earth
Conforms to EU directives
Application around and removal from hazardous live
conductors
Do not discard this product or throw away
CATIV: Measurement category IV: Equipment connected between the origin of the low-
voltage mains supply outside the building and the consumer unit.
CATIII: Measurement category III: Equipment connected between the consumer unit and
the electrical outlets.
CATII: Measurement category II: Equipment connected between the electrical outlets
and the user’s equipment.
Making Basic Measurements
Observe all Warnings and Cautions before measurements.
G CAUTION
When connecting the test leads to the device under test connect the common test
leads before connecting the live test lead. When removing the test leads, remove
the live test lead before removing the common test lead.
Make sure that the buzzer sound is perceptible before using it under high
background noise environment.
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Safety Information

Voltage/Continuity/Single Pole Mode
Voltage Measurement
LED Gindicates measured voltage is high than ELV limit (50 VAC and/or 120 VDC).
G Warning
When batteries are not fitted or are exhausted, the tester is capable of measuring
>45 VAC and/or >35 VDC.
Timing Rating (tr): 30 seconds, Recovery Time (rt): 240 seconds, when measuring
>300 V, recovery time is necessary.
L/R LED may light up when measuring AC voltage.
Due to the high internal resistance, capacitive and inductive voltage (ghost voltage)
may be indicated.
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Voltage/Continuity/Single Pole Mode

Continuity Check
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Voltage/Continuity/Single Pole Mode

Single Pole Phase Check
Detach lead
Grip firmly
Neutral Live
G Warning
The MET1000 Single Pole Check feature consists of using only one test lead
connected to the MET1000, remove second test lead if fitted.
To carry out Single Pole Check test, while firmly holding the MET1000 connect the
test lead into a live circuit, this will cause the MET1000 to repeatedly beep and the
hazard symbol to illuminate without any voltage being displayed on the screen.
If a voltage appears on the screen then use 2 Pole method to prove the circuit live.
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Voltage/Continuity/Single Pole Mode

Phase Rotation Test
Clockwise Phase Sequence L1-L2-L3 (Right)
Source Terminal
Grip 󰄈rmly
Counter-clockwise Phase Sequence L1-L3-L2 (Left)
Source
Grip 󰄈rmly
Terminal
G Warning
Phase Rotation Test works only on 3 phase 4 wire systems. The result is unreliable on
any other systems.
G Note
It maybe necessary to check the result by testing in reverse sequence.
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Phase Rotation Test

Resistor Mode
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Resistor Mode

Current Mode
GCAT III 1000 V
CAT IV 600 V
with respect to
earth for the jaw
GDo not hold the
meter above the
barrier
Barrier for
hand guard
G Warning
The barrier guard on the meter provides maximum protection when holding the unit in
normal use.
G Warning
Remove the test leads from the back of the meter when measuring current.
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Current Mode

Using the Functions
HOLD
Press
Enable/Disable ELV Warning Voice
Press >5sec
Press >5sec
Voltage/Continuity/Single Pole Mode Voltage/Continuity/Single Pole Mode
Press Ω/A button and “HOLD” button at the same time.
Powering ON OFF
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Using the Functions

Torch
Press >2 sec
Powering ON
Self-diagnostic test
or
Press
OFF
G Warning
Do not use the tester if a fault is indicated during self-diagnostic test.
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Using the Functions

Function Button
Resistor Mode
Current Mode
Voltage/Continuity/Single Pole Mode
Press
Button
Press Button
>2 sec
Press
Button
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Using the Functions

Battery Replacement
Press here
Press here
G Warning
Replace the batteries as soon as the low battery indicator starts to flash to avoid
false readings.
Remove test leads from meter before opening the battery cover.
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Battery Replacement

Probe Usage
Press here Press here Press here
G Warning
When using test leads or probes, keep your fingers behind the finger guards.
G Warning
For CAT III or CAT IV environments, use the test leads with the probe tip guard cap
fixed firmly in place. Without the probe tip guard cap the test leads can ONLY be
used in a CAT II environment.
Make sure the test leads are firmly inserted in the instrument and other accessories
are connected securely.
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Probe Usage

Test lead assembly
Press here
G Warning
Do not attach test leads onto the back of
the meter while measuring current.
For 19mm power socket For most applications except current
measurement.
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Test lead assembly

Specifications
Display count : 10,000 counts.
Overrange display : « OL » or « -OL »
Conversion rate : 3 times per second
Dimensions (W x H x D) : 57 x 220 x 35 mm
Weight : 200 g
Power requirements : AAA size battery x 2 (R03, LR03, 24D, 24A)
Battery life : Approximately 1000 operations. (based on
Alkaline batteries, 30 sec. ON, 240 sec. OFF)
Maximum Conductor Size : 16 mm diameter
Safety Standard Compliance :
IEC / EN 61010-1, IEC / EN 61010-2-032,
IEC / EN 61010-2-033,
IEC / EN 61010-031 for CAT IV 600V, CATIII
1000V
IEC / EN 61326-1
IEC / EN 61243-3
Environmental Conditions
Indoor / Outdoor Use
Pollution degree : 2
Maximum Operating Altitude : 2,000 m (6562 ft)
Operating Temperature & Relative
Humidity :
-15 °C ~ 30 °C, ≤80 % RH.
30 °C ~ 40 °C, ≤75 % RH.
40 °C ~ 55 °C, ≤45 % RH.
Storage temperature : -20 to +60 °C, 0 to 80 % RH. (no batteries)
Temperature coefficient : 0,2 x (specified accuracy) / °C,
< 18 °C, > 28 °C
IP rating : IP65
Vibration : Random Vibration per MIL-PRF-28800F
Class 2
Drop Protection : 1.2 m drop to hardwood on concrete floor
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Specifications

Electrical Specifications
Accuracy is given as ± (% of reading + counts of least significant digit) at 23°C ± 5°C,
with relative humidity less than 80% and is specified for 1 year after calibration.
Condition of Auto Power On
With batteries fitted :` > 3.0 V or < -8.0 V between L2 and L1
Detect AC signal by Single Pole
Continuity
Without batteries : > | ±35,0 V DC | or > 45.0 V AC
between L2 and L1
Auto Power Off
The meter automatically turns off if one of the following conditions are met for approx
10 seconds:
The Auto Power On condition is not met.
Both buttons are not pressed.
The meter automatically turns off if one of the following conditions are met for approx
30 seconds:
The resistance is OL when the meter is in resistor mode.
The current is < 1.0 A when the meter is in current mode
For > 300 V, Time rating (tr): 30 seconds; Recovery time (rt): 240 seconds
AC Function : ACV and ACA specifications are AC coupled,
true RMS.
For non-sinusoidal waveforms, Additional
Accuracy by Crest Factor (C.F.):
Add 1.0% for C.F. 1.0 ~ 2.0
Add 2.5% for C.F. 2.0 ~ 2.5
Add 4.0% for C.F. 2.5 ~ 3.0
Max. Crest Factor of Input Signal:
3.0 @ 5000 counts
1.5 @ 10000 counts
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Specifications

Electrical Specification
DC Voltage
Range Resolution Accuracy
With batteries 7.0 V to 999.9 V 0.1 V ±(1.0 % + 2D)
Without batteries(1) 35 V to 999.9 V 0.1 V
(1) Measurement without batteries is only available for < 35°C, > -15°C. The meter will
show “bAtt” and ELV LED when measurement is not available.
Max. Input Current : < 3,5 mA @ 1,000 V
Overload Protection : AC/DC 1,000 V
AC Voltage
Range Resolution Accuracy
With batteries 6.0 V(1) to 999.9 V 0.1 V
±(1.5 % + 5D)
Without batteries(2) 45 V to 999.9 V 0.1 V
(1) For > 65 Hz, the minimum range is 8.0 V
(2) Measurement without batteries is only available for < 35°C, > -15°C. The meter will
show “bAtt” and ELV LED when measurement is not available
Frequency Response : 45 Hz to 400 Hz
Max. Input Current : < 3,5 mA @ 1 000 V
Overload Protection : AC/DC 1,000 V
Resistor
Range Resolution Accuracy
9999 Ω 1 Ω ±(1.5 % + 5D)
50.00 kΩ 0.01 kΩ
Output Voltage : About 0.5 V
Overload Protection : AC/DC 1,000 V
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Specifications