Lecom MachineTest MT300E User manual

ORDER REFERENCE
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Operating Instructions MachineTest MT300E
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ORDER REFERENCE
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Order Reference Order No.
MachineTest MT300E SA 9100 E
1 Basic instrument
1 residual voltage tester
2 safety test leads with fixed test tips, 2m, red
1 alligator clip, insulated
1 Mains cord – Euro plug, 2m
1 Operating instructions E/G/F
1 Test certificate with measured values
1 Declaration of conformity
1 Pack of Report templates (E/G/F)
Options: 1 Special high voltage safety measuring probe 2m, red SB 1000 E
1 Highly flexible measuring lead extension, 2m, red SB 1005 E
1 Highly flexible measuring lead extension, 15m, red SB 1015 E

CONTENTS
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Table of contents
1 INTRODUCTION .............................................................................................................4
1.1.General description...................................................................................................4
1.2.List of measured parameters.....................................................................................4
1.3.Standards applied .....................................................................................................4
2 SAFETY REGULATIONS.................................................................................................5
3 INSTRUMENT DESCRIPTION.........................................................................................7
3.1.Front panel................................................................................................................7
3.2.Accessory compartment and short instruction panel.................................................8
3.3 Front panel of hand-held residual voltage tester .......................................................9
3.4.Accessories.............................................................................................................10
4 MEASUREMENTS..........................................................................................................11
4.1 Voltage drop across PE conductor / resistance of PE conductor............................11
4.2 Insulation resistance................................................................................................13
4.3 Residual voltage......................................................................................................15
4.4 HV dielectric test (withstanding voltage test)...........................................................20
5 TECHNICAL SPECIFICATIONS.....................................................................................22
5.1 General (basic instrument)......................................................................................22
5.2 Functions (basic instrument)...................................................................................22
5.3 General (Residual Voltage Tester)..........................................................................23
5.4 Function (Residual Voltage Tester).........................................................................23
6 MAINTENANCE..............................................................................................................24
6.1 Cleaning..................................................................................................................24
6.2 Fuses ......................................................................................................................24
6.3 Periodic calibration..................................................................................................24
7 SERVICE........................................................................................................................25

GENERAL
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1. INTRODUCTION
Congratulations on your purchase of this test instrument which was developed to offer
realisation of all required tests and measurements on machines according to the
International Standard IEC 60204 and the European Standard EN 60204.
1.1. General description
The MachineTest MT300E offers very simple operation, easy to read large LED display
which enables reliable reading of test results even in dark environment. Due to
simplicity of the instrument it is sufficient for the operator to read this short booklet to be
familiar with operation procedures.
Portable double-wall plastic housing protects the instrument against mechanical shocks,
front panel with operating elements is protected by a rough cover.
A great advantages against similar products are two uniform test leads connected to
uniform test terminals which serve for all measurement functions.
All included accessories are placed under protection cover and cannot get lost. There is
also a clear short instruction label under the cover to remind the operator anytime how
to connect test leads to tested object and what are the limit values prescribed by the EN
60204 standard.
1.2. List of measured parameters
The following parameters can be tested /measured:
Voltage drop across PE conductor / Resistance of PE conductor
•test voltage <12 V AC
•test current >10 A AC
Insulation Resistance
•nominal test voltage 500 V DC
•test current >1 mA up to Rins = 500 kΩ
Residual voltage
•measurement after 1s / 5s
•safe level of residual voltage 60 V DC
HV Dielectric test (withstanding voltage)
•test voltage >1000 V AC supplied by isolated transformer having rated
power of 500 VA
•selection of tripping currents 10/50/100/200mA (due to capacitances)
1.3. Standards applied
IEC/EN 61010-1 ...........Basic safety standard
IEC/EN 61326-1 ...........EMC standard (noise and immunity)
IEC/EN 60204...............Safety of electrical equipment of electrical machines
DIN VDE 0113 .............Safety of electrical equipment of electrical machines
DIN VDE 0104
DIN VDE 0701

SAFETY REGULATIONS
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2. SAFETY REGULATIONS
This measuring device is only to be installed and operated by qualified
personnel and according to the technical data in compliance with the
safety precautions and regulations set forth below. Additionally, the use
of this equipment requires compliance with all legal and safety
regulations pertaining to each specific application. Similar regulations
apply to the use of accessories.
Operating electrical devices implies that parts of the device carry
dangerous voltages. Disregarding warning notices may lead to serious
physical injury and material damage.
It can be assumed that safe operation is no longer possible if the device
•Shows visible damage,
•Has been exposed to unfavourable conditions (e.g. storage beyond the
permissible climatic limits without adaptation to the ambient climate,
dewing etc.) or
•Has been exposed to major strain during transport
(e.g. been dropped from some height without visible external damage etc.).
Qualified Personnel
Are persons familiar with the setting up, installation, starting off and operation of the
device and possess a formal qualification required for such activities.
Special warnings in order to assure operator’s safety while carrying out the tests:
If the test instrument is used in manner not specified in this manual the
protection provided by the instrument may be impaired!
Do not use the instrument in explosive atmosphere!
In case of blown any fuse, follow the instructions in this manual to replace it!
Service intervention or calibration procedure is allowed to be carried out only by
a competent authorised person!

SAFETY REGULATIONS
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This symbol means: Please read the operating instructions with particular care!
Meaning of the symbol: Hazardous voltage generated by the
instrument may be applied to the test terminals!
-Intermittent use! An acoustic signal (beep) will
indicate a measuring time of 10s. To avoid
unintended overheating don’t measure continuously
with 10A. If the instrument is overheated the “HOT”
control LED at the display will indicate this and stop
the measurement.
-Use only standard or optional test leads supplied by your
dealer, otherwise the tests may be highly dangerous!
-Avoid direct contact with test tips, hazardous voltage
may be applied!
-Do not connect external voltage to test terminals
otherwise the instrument may be damaged or internal
fuse may blow!
-If the START/STOP control lamp can not be switched off
pressing the START/STOP key, then stop the
measurements immediately, unplug the mains cord and
let the instrument to be serviced!
+
∼
∼
_

INSTRUMENT DESCRIPTION
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3 INSTRUMENT DESCRIPTION
3.1 Front panel
Fig. 01: Front panel
1 ............. Euro mains socket 230 V / 50 Hz, 500 VA.
2 ............. General fuse T 6.3 A / 250 V (5 × 20 mm).
3 ............. Mains key type ON / OFF switch.
4 ............. TEST LEAD COMPENSATION button to compensate resistance of test
leads in functions UPE and RPE.
5 ............. Rotary switch to select one of four available measurement functions.
6 ............. TRIPPING CURRENT select tripping current for HV test (in case there is
some capacitive or resistive leakage current present at the tested machine).
7 ............. Yellow TRIP OUT control lamp to inform the operator that break-through
and thus trip out test voltage has occurred.
8 ............. MEASUREMENT ON control lamp which will light when any measurement is
running – take care, dangerous voltage may be applied to test terminals.
9 ............. START / STOP key to start or stop any measurement.
10 ........... Test terminal + ∼.
11 ........... Test terminal - ∼.
12 ........... Hot control lamp. It will light if the instrument is overheated in functions UPE
or RPE. START button will not be operational (only in UPE and RPE functions)
until the lamp is off.
13 ........... Unit of displayed result.
14 ........... Red LED display.

INSTRUMENT DESCRIPTION
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3.2. Accessory compartment and short instruction panel
All required test accessories are kept in appropriate accessory compartment under the
casing cover. There is also an instruction panel with short instructions how to connect
test leads for a certain measurement as well as limit values of test results prescribed by
the EN 60204 European standard. The instruction panel is both side printed (English-
French on one side and German on the other). The user can simply swap it to change
the language.
How to swap the instruction panel?
The panel is placed behind transparent foil, that is why it is necessary to remove black
leather holder at least at the upper side first, then the panel can be pulled out and
swapped, see the figure below.
Fig. 02: Instruction panel

INSTRUMENT DESCRIPTION
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3.3 Front panel of hand-held Residual Voltage Tester
Fig. 03: Front panel of Residual Voltage Tester
1............. Green/red Result control lamp. Green colour is “on” when the value of
Residual Voltage (result) is below 60 V DC 1s / 5s after switching off tested
machine. Red colour is “on” when the value of Residual Voltage (result) is
above 60 V DC 1s / 5s after switching off tested machine.
2............. Red Machine Power on control lamp. It is automatically switched “on” a
few seconds after detecting stable mains AC or DC voltage connected to
test terminals.
3............. ON/OFF key to switch the tester “on” or “off”. Automatic “off” occurs in case
the tester has not been used for more than 5 minutes.
-Linear mode (Description see 4.3):
Switch on the tester pressing the on/off key and keeping it pressed for
approx. 2s until all three red control lamps (bat, Machine Power on and
Result) go “on”, then release the on/off key. After 1s two lamps go “off” while
the bat lamp stays “on”. Residual Voltage Tester is thus in Linear mode.
-Non-linear mode (Description see 4.3):
Switch on the tester pressing the on/off key and releasing it. Bat lamp goes
“on”, Residual Voltage Tester is thus in linear mode.
4............. Red Bat control lamp. The lamp continuously lights if battery is in good
condition and starts to blink when the battery is in empty condition.
5............. Test duration switch to select waiting time (1s – plug test or 5s – internal
test) activated after automatic recognition of switching “off” tested machine.
6............. Test terminals (banana sockets).

INSTRUMENT DESCRIPTION
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3.4 Accessories
Two test leads CAT III, 1000V, double insulation
Fig. 04: Test leads, parallel combination of both test tips which fit to mains outlet
Alligator clip
Fig. 05. Insulated alligator clip
l = 2 m
19 mm