HT G Series User manual
Copyright HT ITALIA 2020 Release EN 5.02 - 14/09/2020
Gx Series
User manual
Gx Series
EN - 1
TABLE OF CONTENTS
1.
PRECAUTIONS AND SAFETY MEASURES ...............................................................3
1.1.Preliminary instructions ..................................................................................................... 3
1.2.During use ......................................................................................................................... 4
1.3.After use ............................................................................................................................ 4
1.4.Definition of measurement (overvoltage) category............................................................ 4
2.
GENERAL DESCRIPTION ...........................................................................................5
2.1.Foreword ........................................................................................................................... 5
2.2.Instrument functions .......................................................................................................... 6
3.
PREPARATION FOR USE ...........................................................................................7
3.1.Initial checks...................................................................................................................... 7
3.2.Instrument power supply ................................................................................................... 7
3.3.Storage.............................................................................................................................. 7
4.
NOMENCLATURE........................................................................................................8
4.1.Instrument description ....................................................................................................... 8
4.2.Description of measuring leads ......................................................................................... 8
4.3.Keyboard description......................................................................................................... 9
4.4.Display description ............................................................................................................ 9
4.5.Initial screen ...................................................................................................................... 9
5.
GENERAL MENU.......................................................................................................10
5.1.Instrument settings .......................................................................................................... 10
Language ............................................................................................................................... 10
5.1.1.
Reference country.................................................................................................................. 11
5.1.2.
Automatic Power OFF for display and key sound.................................................................. 11
5.1.3.
System ................................................................................................................................... 11
5.1.4.
Operator name entry.............................................................................................................. 11
5.1.5.
System date/time setting........................................................................................................ 12
5.1.6.
Information ............................................................................................................................. 12
5.1.7.
6.
OPERATING INSTRUCTIONS...................................................................................13
6.1.RPE: Continuity of protective conductors........................................................................ 13
Anomalous situations............................................................................................................. 17
6.1.1.
6.2.M: Measurement of insulation resistance ..................................................................... 18
AUTO or L-PE Timer mode.................................................................................................... 20
6.2.1.
AUTO L/N-PE mode .............................................................................................................. 22
6.2.2.
Anomalous situations............................................................................................................. 24
6.2.3.
6.3.RCD: Test on differential switches .................................................................................. 25
AUTO mode ........................................................................................................................... 29
6.3.1.
AUTO+ mode ..................................................................................................................... 30
6.3.2.
x½, x1, x2, x5 modes ............................................................................................................. 31
6.3.3.
Mode x1 – Test on RCDs with delay time.............................................................................. 31
6.3.4.
Mode ................................................................................................................................. 32
6.3.5.
Test on earth leakage relay RCD........................................................................................... 33
6.3.6.
Anomalous situations............................................................................................................. 34
6.3.7.
6.4.LOOP: Line impedance/Loop and overall earth resistance............................................. 37
Test types............................................................................................................................... 39
6.4.1.
6.4.2Test leads calibration (ZEROLOOP) ..................................................................................... 41
6.4.3STD Mode – Generic test ...................................................................................................... 43
Mode kA – Verify of breaking capacity of protection device .................................................. 44
6.4.4.
Mode I2t – Verify of protection against short-circuit ............................................................... 46
6.4.5.
Mode - Verify of protection coordination ..................................................................... 49
6.4.6.
Mode - Verify of protection coordination – Norvay country......................................... 51
6.4.7.
Verify of protection against indirect contacts (TN system) .................................................... 53
6.4.8.
Verify of protection against indirect contacts (NoTrip test) ................................................ 55
6.4.9.
Verify of protection against indirect contacts (No Trip test – UK Country) ............................ 57
6.4.10.
Verify of protection against indirect contacts (IT systems) .................................................... 59
6.4.11.
Verify of protection against indirect contacts (TT systems) ................................................... 60
6.4.12.
Impedance measurement by means of the accessory IMP57............................................... 62
6.4.13.
Anomalous situations............................................................................................................. 64
6.4.14.
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EN - 2
6.5.SEQ: Phase sequence and phase concordance test...................................................... 66
Anomalous situations............................................................................................................. 69
6.5.1.
6.6.LEAKAGE: Leakage current measurement..................................................................... 70
6.7.EARTH: Measurement of earth resistance...................................................................... 72
3-wire or 2-wire earth measurement and 4-wire ground resistivity........................................ 72
6.7.1.
3-wire or 2-wire earth measure – USA, Extra Europe and Germany countries..................... 78
6.7.2.
Earth measurement with optional clamp T2100 .................................................................... 81
6.7.3.
Anomalous situations in 3-wire and 2-wire earth measurements .......................................... 84
6.7.4.
6.8.AUX: Measure of ambient parameters via external probes............................................. 85
6.9.∆V%: Voltage drop of main lines..................................................................................... 87
Anomalous situations............................................................................................................. 91
6.9.1.
6.10.AUTO TEST: automatic test sequence (NoTrip , RCD, M)........................................ 93
AutoTest in TT systems ........................................................................................................ 94
6.10.1.
AutoTest in TN systems........................................................................................................ 96
6.10.2.
Anomalous situations............................................................................................................. 98
6.10.3.
6.11.PQA: Real time measurement of main parameters....................................................... 101
6.12.EVSE: Safety test for electric car charging stations ...................................................... 104
7.
OPERATIONS WITH THE MEMORY.......................................................................124
7.1.Saving measurements................................................................................................... 124
7.2.Recalling measurements and deleting the memory ...................................................... 125
Anomalous situations........................................................................................................... 126
7.2.1.
8.
CONNECTING THE INSTRUMENT TO A PC OR MOBILE DEVICES ....................127
8.1.Connection to iOS/Android devices through WiFi ......................................................... 127
9.
USE OF STRAP SET ...............................................................................................128
10.
MAINTENANCE .......................................................................................................131
10.1.General information....................................................................................................... 131
10.2.Replacement of the batteries ........................................................................................ 131
10.3.Cleaning the instrument ................................................................................................ 131
10.4.End of life ...................................................................................................................... 131
11.
TECHNICAL SPECIFICATIONS ..............................................................................132
11.1.Technical characteristics ............................................................................................... 132
11.2.Reference guidelines..................................................................................................... 137
11.3.General characteristics.................................................................................................. 137
11.4.Environment .................................................................................................................. 137
Environmental conditions for use......................................................................................... 137
11.4.1.
11.5.Accessories ................................................................................................................... 137
12.
SERVICE..................................................................................................................138
12.1.Warranty conditions....................................................................................................... 138
12.2.Service .......................................................................................................................... 138
13.
THEORETICAL APPENDIXES.................................................................................139
13.1.Continuity of protective conductors ............................................................................... 139
13.2.Insulation resistance...................................................................................................... 140
13.3.Checking circuit separation ........................................................................................... 141
13.4.Test on differential switches (RCD)............................................................................... 143
13.5.Verify of the breaking capacity of protection devices .................................................... 144
13.6.Verify of protection against indirect contacts in TN systems ......................................... 145
13.7.No trip test in TN systems ............................................................................................. 147
13.8.Verify of protection against indirect contacts in TT systems ......................................... 148
13.9.Verify of protection against indirect contacts in IT systems........................................... 149
13.10.Verify of protection coordination L-L, L-N and L-PE...................................................... 150
13.11.Verify of the protection against short circuits – Test I2t................................................. 152
13.12.Verification of voltage drop on main lines...................................................................... 153
13.13.Measurement of earth resistance in TN systems .......................................................... 154
13.14.Voltage and current Harmonics..................................................................................... 159
Presence of harmonics: causes........................................................................................... 160
13.14.1.
Presence of harmonics: consequences............................................................................... 161
13.14.2.
13.15.Calculation of powers and power factors ...................................................................... 162
Gx Series
EN - 3
1. PRECAUTIONS AND SAFETY MEASURES
The models of the Gx Series have been designed in compliance with Directives
IEC/EN61557 and IEC/EN61010, relevant to electronic measuring instruments. Before and
after carrying out the measurements, carefully observe the following instructions:
Do not carry out any voltage or current measurement in humid environments.
Do not carry out any measurements in case gas, explosive materials or flammables are
present, or in dusty environments.
Avoid any contact with the circuit being measured if no measurements are being
carried out.
Avoid contact with exposed metal parts, with unused measuring probes, etc.
Do not carry out any measurement in case you find anomalies in the instrument such
as deformations, breaks, substance leaks, absence of display on the screen, etc.
Pay special attention when measuring voltages higher than 25V in special
environments (such as construction sites, swimming pools, etc.) and higher than 50V in
normal environments, since a risk of electrical shock exists.
Only use original accessories.
The following symbols are used in this manual:
CAUTION: observe the instructions given in this manual; improper use could
damage the instrument, its components or create dangerous situations for the
operator.
High voltage danger: electrical shock hazard.
Double insulation
AC voltage or current
DC voltage or current
Connection to earth
The symbol indicates that the instrument must not be connected to systems with
phase-to-phase rated delta voltage higher than 415V.
1.1. PRELIMINARY INSTRUCTIONS
This instrument has been designed for use in the environmental conditions specified in
§ 11.4.1. Do not use in different environmental conditions.
The instrument may be used for measuring and verifying the safety of electrical
systems. Do not use on systems exceeding the limit values specified in § 11
We recommend following the normal safety rules devised to protect the user against
dangerous currents and the instrument against incorrect use.
Only the accessories supplied with the instrument guarantee compliance with safety
standards. They must be in good conditions and be replaced with identical models,
when necessary.
Make sure the batteries are correctly installed.
Before connecting the test leads to the circuit being measured, check that the desired
function has been selected
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EN - 4
1.2. DURING USE
Please carefully read the following recommendations and instructions:
CAUTION
Failure to comply with the caution notes and/or instructions may damage
the instrument and/or its components or be a source of danger for the
operator.
Before changing function, disconnect the test leads from the circuit under test.
When the instrument is connected to the circuit under test, never touch any terminal,
even if unused.
Avoid measuring resistance if external voltages are present. Even if the instrument is
protected, excessive voltage could cause damage.
While measuring current, place the clamp jaws as far as possible from the conductors
not involved in the measurement, as the magnetic field they produce could interfere
with the measuring operations and place the conductor as much as possible in the
center of the jaws to maximize accuracy.
1.3. AFTER USE
When measurements are completed, turn off the instrument by pressing and holding the
ON/OFF key for some seconds. If the instrument is not to be used for a long time, remove
the batteries and follow the instructions given in § 3.3.
1.4. DEFINITION OF MEASUREMENT (OVERVOLTAGE) CATEGORY
Standard "IEC/EN61010-1: Safety requirements for electrical equipment for measurement,
control and laboratory use, Part 1: General requirements” defines what measurement
category, commonly called overvoltage category, is. § 6.7.4: Measured circuits, reads:
circuits are divided into the following measurement categories:
Measurement category IV is for measurements performed at the source of a low-
voltage installation.
Examples are electricity meters and measurements on primary overcurrent protection
devices and ripple control units.
Measurement category III is for measurements performed on installations inside
buildings.
Examples are measurements on distribution boards, circuit breakers, wiring, including
cables, bus-bars, junction boxes, switches, socket-outlets in fixed installation, and
equipment for industrial use and some other equipment, for example, stationary motors
with permanent connection to fixed installation.
Measurement category II is for measurements performed on circuits directly
connected to the low-voltage installation.
Examples are measurements on household appliances, portable tools and similar
equipment.
Measurement category I is for measurements performed on circuits not directly
connected to MAINS.
Examples are measurements on circuits not derived from MAINS, and specially
protected (internal) MAINS-derived circuits. In the latter case, transient stresses are
variable; for that reason, the standard requires that the transient withstand capability of
the equipment is made known to the user.
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EN - 5
2. GENERAL DESCRIPTION
2.1. FOREWORD
This user manual is referred to the following models MACROEVTEST, MACROTESTG3,
MACROTESTG2, MACROTESTG1, COMBIG2, COMBITEST425, COMBITEST425EV,
SUPERCOMBI,COMBIG2PLUS, MT-300 and COMBIG3. The model MT-300 is the same
of MACROEVTEST. The models COMBITEST425EV and COMBIG2PLUS are the same
of COMBIG2. The model COMBITEST425 is the same of SUPERCOMBI. Unless
otherwise specified, the “instrument” is referred to MACROEVTEST model. The following
Table 1 shows the possible functions
Symbol Measurement description MACRO
EV TEST
MACROTEST
G3
MACROTEST
G2
MACROTEST
G1
COMBI
G2
COMBI
G3
SUPER
COMBI
RPE
Continuity test of earth,
protective equipotential
conductors and
continuity test as
multimeter function
M
Measurement of
insulation resistance (L-
PE and L/N-PE modes)
RCD
Test on molded case
RCD (STD) and earth
leakage delay tester
RCDs ( )
AUTO
AUTO sequence of
NoTrip , RCD, M
measures
LOOP
Measurement of global
earth resistance (No
Trip ) and Line/Loop
impedance (P-N, P-P,
P-PE)
EARTH
Measurement of earth
resistance and soil
resistivity with
voltammetric methos
and measurement with
optional clamp
SEQ
Detection of phase
rotation with 1-wire and
2-wire method
AUX
Measurement of
environmental
parameters
(Temperature,
Humidity, Illuminance of
white and LED light
sources)
LEAK.
measurement of
leakage current by
using optional clamp
HT96U
∆V%
Measurement of
percentage voltage
drop on main lines
PQA
Real time measurement
of main parameters
(powers, harmonics,
power factor/ cos)
EVSE
Safety test on electric
car charging system
(EVSE)
Table 1: Characteristics of models
Gx Series
EN - 6
2.2. INSTRUMENT FUNCTIONS
The instrument is equipped with a TFT color LCD display, with capacitive "touch-screen"
that can be handled simply with the touch of a finger by the user and is structured with an
icon-based menu allowing the direct selection of measurement functions for quick and
intuitive use.
The instrument can perform the following tests (compatibly with the characteristics
described in Table 1):
RPE Continuity test of earth, protective and equipotential conductors with
test current higher than 200mA and open-circuit voltage between 4V
and 24V and continuity test as multimeter function
MMeasurement of insulation resistance L/PE or L-N/PE with continuous
test voltage of 50V, 100V, 250V, 500V or 1000V DC
RCD Test on molded case RCD (Standard – STD) and on earth leakage
relay RCD ( ) General (G), Selective (S) and Delayed ( ) of type A
() and AC ( ) and B ( ) of the following parameters: tripping time,
tripping current, contact voltage
LOOP Measurement of line impedance/Loop P-N, P-P, P-E with calculation of
the assumed short-circuit current, also with high resolution (0.1m) (by
means of optional accessory IMP57), overall earth resistance without
causing the RCD tripping (NoTrip ), check of the interruption capacity
of magnetothermal protections (MCB) and fuses, I2t test, protection
check in case of indirect contacts
AUTO TEST Automatic sequence of NoTrip , RCD, M(L-PE, N-PE)
measurements in TT and TN systems
EARTH Measurement of earth impedance and ground resistivity by
voltammetric method and by an external clamp connected to the
instrument (optional accessory T2100)
SEQ Indication of phase sequence with 2- or 1-terminal method
AUX Measurement of environmental parameters (illuminance with white light
source and LED source, air temperature, humidity) by means of
optional external probes and DC voltage signals
LEAKAGE Measurement of leakage current (by means of the optional accessory
HT96U)
ΔV% Measurement of percentage voltage drop on main lines
PQA Real time measurement of main parameters (powers, harmonics, power
factor/cos) in Single phase and Three phase balanced systems
EVSE Automatic sequence of safety tests on mode 2 and 3 electric car
charging stations (by means of optional accessory EV-TEST100)
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EN - 7
3. PREPARATION FOR USE
3.1. INITIAL CHECKS
Before shipping, the instrument has been checked from an electric as well as mechanical
point of view. All possible precautions have been taken so that the instrument is delivered
undamaged. However, we recommend checking it to detect any damage possibly suffered
during transport. In case anomalies are found, immediately contact the Dealer. We also
recommend checking that the packaging contains all the components indicated in § 11.5.
In case of discrepancy, please contact the Dealer. In case the instrument should be
returned, please follow the instructions given in § 12.
3.2. INSTRUMENT POWER SUPPLY
The instrument is powered by 6 1.5V alkaline batteries of type AA LR06 or 6 1.2V NiMH
rechargeable batteries of type AA LR06. Rechargeable batteries can be recharged with
the external charger. The green “ ” symbol indicates a sufficient charge level for the
correct execution of the tests. The red “ ” symbol indicates an insufficient charge level for
the correct execution of the tests. In this case, recharge the batteries (see § 10.2).
The instrument is capable of keeping data stored even without batteries.
The instrument has an AutoPower OFF function (which can be deactivated) after 5
minutes idling (see § 5.1.2).
3.3. STORAGE
In order to guarantee precise measurement, after a long storage time under extreme
environmental conditions, wait for the instrument to come back to normal condition (see §
11.4.1).
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EN - 8
4. NOMENCLATURE
4.1. INSTRUMENT DESCRIPTION
CAPTION:
1. Inputs
2. LCD Touch screen display
3. Function keys F1, F2, F3, F4
4. ,, , / ENTER keys
5. Compartment of the connector
for optical cable/USB port
6. ESC key
7. GO/STOP key
8. HELP key
9. SAVE key
10.ON/OFF key
Fig. 1: Description of the front part of the instrument
CAPTION:
1. Connector for remote probe
2. B1, B2 (not COMBIG2), B3, B4
inputs (*)
3. In1 input
Fig. 2: Description of the upper part of the instrument
CAPTION:
1. Connector for optical cable/USB
C2006
Fig. 3: Description of the instrument's side
4.2. DESCRIPTION OF MEASURING LEADS
CAPTION:
1. Hand protection
2. Safe area
Fig. 4: Description of measuring leads
(*) The colors of input terminals and test cables can be change depending on the different
Countries
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EN - 9
4.3. KEYBOARD DESCRIPTION
The keyboard includes the following keys:
ON/OFF key to switch on/off the instrument
ESC key to exit the selected menu without confirming
keys to move the cursor through the different screens in order
to select the desired programming parameters
HOME / ENTER key to back to general Menu on each moment
GO/STOP key to start the measurement
SAVE key to save the measured values
HELP key to access the online help and display the possible connections
between the instrument and the system for each selected function
F1, F2, F3, F4 Function keys corresponding to the activation of the four icons on the
bottom of the screen as an alternative to direct touch on the display
4.4. DISPLAY DESCRIPTION
The display is an LCD, 320x240pxl TFT color display with
capacitive touch screen whose icon-structure can be directly
selected with a simple touch. The first line of the display
indicates the type of active measurement, the date/time and
the battery charge indication.
4.5. INITIAL SCREEN
When switching on the instrument, the initial screen appears
for a few seconds. It shows:
The HT manufacturer's logo
The instrument model
The Firmware version of the two instrument's internal
microprocessors (LCD and CPU)
The serial number (SN:) of the instrument
The date of instrument calibration (Calibration date:)
After a few seconds, the instrument switches to the general menu.
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EN - 10
5. GENERAL MENU
Pressing the ENTER key in any condition of the instrument allows to go back to the
general menu in which internal parameters may be set, the saved measures can be
displayed and the desired measuring function may be selected.
Fig. 5: General menu of the instrument
Touch the icon to move to the following page of the general menu. Inside the
screens, touch the icon to confirm a selection or the icon to exit without
confirming.
5.1. INSTRUMENT SETTINGS
Touch the icon. The screen to the side appears on the
display. The following settings are available:
System language setting
Setting of the type of electrical system
Setting of the country
Operator name setting
System date/time setting
Information instrument section
Activation/deactivation of display AutoPower OFF and of
key sound
Settings will be maintained also after switching off the
instrument.
Language
5.1.1.
Touch the icon to select the system language. The
screen to the side appears on the display.
Select the desired language, confirm the choice and return to
the previous screen.
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EN - 11
Reference country
5.1.2.
Touch the icon to select the reference country. This
choice have influence on the LOOP, NoTrip and EARTH
measurements. The screen to the side appears on the
display. Select the desired country, confirm the choice and
return to the previous screen.
NOTE: in the EUR, UK no USA, GER, AUS/NZ and NOR
countries the guide user interface and the result of the
LOOP/ and NoTrip tests can be modified
Automatic Power OFF for display and key sound
5.1.3.
Touch the icon. The screen to the side appears on the
display.
Move the slide bar reference of section " " down/up to
turn off/on the Automatic Power OFF of the instrument after
a period of inactivity of 5 minutes.
Move the slide bar reference of section " " down/up to
disable/enable the sound key when pressed. Confirm the
choices made and go back to the previous screen.
System
5.1.4.
Touch the icon to select the type of electrical system
(TT, TN or IT), of the mains frequency (50Hz, 60Hz), of the
limit value for contact voltage (25V, 50V) and rated voltage
value to be used for calculating the assumed short-circuit
current (see §). The screen to the side appears on the
display. NOTE: for “USA” country this icon is not
displayed and the electrical system is fixed to TN
Move the slide bar references to select the options. Confirm
the choices made and go back to the previous screen.
Operator name entry
5.1.5.
Touch the icon to enter the name of the operator that
will be displayed in the header of each measurement
downloaded to PC. The screen to the side appears on the
display.
Set the desired name using the virtual keyboard (max 12
characters).
Confirm the settings or exit without saving.
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EN - 12
System date/time setting
5.1.6.
Touch the icon to set the system date/time. The screen
to the side appears on the display.
Touch the "EU" icon for the European date/time system in
the format "DD/MM/YY hh:mm" or the "US" icon for the
American system in the format "MM/DD/YY hh:mm AM/PM".
Touch the up/down arrow keys to set the desired value.
Confirm the settings or exit without saving.
Current date/time is kept inside the instrument without
batteries for approximately 12 hours.
Information
5.1.7.
Touch the icon . The display shows the screen on the
right with the icons relative to the properties of the
instrument, the optional accessories IMP57 and T2100 and
the HTAnalysis APP
Touch the icon . The display shows the screen on the
right as well as following information:
Serial number
Internal version of Firmare and Hardware (for the
accessories IMP57 and T2100 these informations are
available only after the connection to the instrument)
Last calibration date
Touch the icon . The display shows the screen on the
right with the QR code of HTAnalysis APP (see § 8.1).
Touche the icon to exit and return to the general
menu
Gx Series
EN - 13
6. OPERATING INSTRUCTIONS
6.1. RPE: CONTINUITY OF PROTECTIVE CONDUCTORS
This function is performed in compliance with standards IEC/EN61557-4, BS7671 17th
edition, AS/NZS 3000, AS/NZS 3017 and allows measuring the resistance of protective
and equipotential conductors.
CAUTION
The instrument can be used for measurements on installations with overvoltage
category CAT IV 300V to earth and max 415V between inputs
We recommend holding the alligator clip respecting the safety area created by
the hand protection (see § 4.2).
Check that no voltage is present at the ends of the item to be tested before
carrying out a continuity test.
The results may be influenced by the presence of auxiliary circuits connected in
parallel with the item to be tested or by transient currents.
The following operating modes are available:
Compensation of the resistance of the cables used for measurement. The
instrument automatically subtracts the value of cable resistance from the
measured resistance value. Therefore, it is necessary that this value is
measured each time the measuring cables are changed or extended.
AUTO The instrument carries out two measurements with inverted polarity and
displays their average value. Recommended mode
The instrument performs a continuity test between two points like a common
multimeter without the possibility to save the test result
The instrument carries out the measurement with the possibility of setting a
duration time for testing. The operator may set a sufficiently long measuring
time (between 1s and 15s) to be able to move the protective conductors while
the instrument is carrying out the test, in order to find out a possible bad
connection.
CAUTION
Continuity test is carried out by supplying a current higher than 200mA
in case the resistance does not exceed ca. 2(including resistance of
the test cables). For higher resistance values, the instrument carries out
the test with a current lower than 200mA.
Fig. 6: Continuity test by means of single cables and remote lead
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EN - 14
1. Touch the icon. The screen to the side appears on
the display. The instrument automatically carries out the
test for the presence of voltage between the inputs
(shown on the display) and blocks the test in case of
voltage higher than 10V. Touch the “AUTO” icon to set
the measuring mode. The following screen appears on
the display:
2. Move the slide bar reference in the positions "AUTO"
(Automatic mode), " " (Timer mode) or “ ” (Multimeter
mode). Confirm the choice by going back to the previous
screen. If Timer mode is selected, the following screen is
shown:
3.
Touch the icon to zero the value in the Timer field
and use the virtual keyboard to set the value in seconds
between 1s and 15s. Confirm the choice by going back to
the initial measurement screen.
4. Touch the icon "Rxx" to set the maximum limit value of
the resistance on which the instrument makes the
comparison with the measured value. The screen to the
side appears on the display.
Touch the icon to zero the value in the “R” field.
Use the virtual keyboard to set the value between 0.01
and 9.99.
Confirm the choice by going back to the initial
measurement screen. Note the presence of the set limit
value.
5. Perform, if necessary, the compensation of the measuring leads resistance by
connecting the cables or the remote lead as shown in Fig. 7.
Fig. 7: Compensation of single cables and remote lead resistance
Gx Series
EN - 15
6. Touch the icon to activate the measurement. After
a few seconds, the instrument provides the screen to the
side if the operation is successful (Rcables 5); the
indication of the value is shown in the "Rcal" field and the
icon is shown on the display.
Touch the "AUTO" icon or " " to go back to the main
measurement screen.
CAUTION
Before connecting the test leads, make sure that there is no voltage at
the ends of the conductor to be tested.
7. Connect the alligator clips and/or test leads and/or remote lead to the conductor to
be tested as in Fig. 6.
CAUTION
Always make sure, before any measurement, that the compensation
resistance value is referred to the cables currently used. In case of
doubt, repeat points 5 and 6.
8. Press the GO/STOP key on the instrument or the START key on the remote lead.
The instrument will start the measurement. During this whole stage, do not
disconnect the test leads of the instrument from the conductor under test. The
following screen appears on the display:
9. The value of the result in the AUTO function is shown in
the upper part of the screen, while the partial values of
the test with inverted polarity of the test source in addition
to the real test currents are reported in the fields "R+" and
"R-".
The symbol indicates the positive result of the
measurement.
Press the SAVE button or touch the icon to save the
measurement (see § 7.1)
10. The value of the result in the “”function is shown in
the screen to the side. The instrument emits a continuous
sound if the measured value is less than or equal to the
set threshold. Press the GO/STOP button on the
instrument again or the START button on the remote
probe to stop the measurement.
This function does not allow to save the result in memory
Gx Series
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11. At the end of the test in the AUTO function if the value
of the measured resistance is higher than the set limit,
the screen to the side is shown on the display.
The value is shown in red and the symbol indicates
the negative result of the measurement. The "> 99.9"
message indicates the instrument overload status.
Press the SAVE button or touch the icon to save the
measurement (see § 7.1).
12. At the end of the test in the “”function if the value of the
measured resistance is higher than the set limit, the value
is shown in red. The indication ">1999" indicates the
overrange of the instrument as shown in the screen to the
side
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Anomalous situations
6.1.1.
1. In AUTO or " " modes if the instrument detects a
resistance lower than the set limit value but for which is it
not able to generate a current of 200mA, the screen to
the side is displayed.
The symbol is shown on the display and the values
of the real test current are indicated in red.
2. If in mode the instrument detects a resistance
higher than 5at its terminals, it resets the offset value
and displays a screen like the one to the side. The
icon is shown on the display to indicate the
calibration reset value (i.e. performing the operation with
open terminals).
3. In case the instrument detects a calibration resert
(performing the operation with open terminals), it gives
out a long sound and displays a screen like the one to
the side. The icon is shown on the display to
indicate the calibration reset value.
4. If the instrument detects a calibrated resistance higher
than measured resistance (e.g. by using test cables
different from the supplied ones) at its terminals, it gives
out a long sound and displays a screen like the one to
the side. Perform a calibration reset with open terminals
and start a new calibration.
5. If the instrument detects a voltage value higher than 10V
at its terminals, it does not carry out the test, gives out a
long sound and the screen reported here to the side is
displayed.
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6.2. M: MEASUREMENT OF INSULATION RESISTANCE
This function is performed in compliance with standards IEC/EN61557-2, BS7671 17th
edition, AS/NZS 3000, AS/NZS 3017 and allows measuring the insulation resistance
between the active conductors and between each active conductor and the earth.
CAUTION
The instrument can be used for measurements on installations with overvoltage
category CAT IV 300V to earth and max 415V between inputs.
We recommend holding the alligator clip respecting the safety area created by
the hand protection (see § 4.2).
Check that the circuit being tested is not live and that all possible loads normally
connected to it are disconnected before carrying out insulation measurement.
The following operating modes are available:
AUTO L-PE The test is performed between L-PE conductors and activated by the
GO/STOP key of the instrument (or START of the remote lead) and
lasts 2 seconds
AUTO L/N-PE The test is performed between L-PE and N-PE conductors and
activated by the GO/STOP key of the instrument (or START of the
remote lead) and lasts 2 seconds. Recommended mode
Timing test between L-PE conductors The operator may set a
sufficiently long measuring time (5s 999s) to be able to move the test
lead on the conductors being tested, while the instrument is carrying out
the test. For the whole measurement duration, the instrument will give
out a short sound every second. While measuring, if the insulation
resistance reaches a lower value than the set limit, the instrument will
give a continuous acoustic signal. To stop the test, press again the
GO/STOP key on the instrument or the START key on the remote lead.
Fig. 8: Insulation test between L-PE by means of single cables and remote lead
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Fig. 9: Insulation test between L-PE by means of shuko plug
Fig. 10: Insulation test between L-PE and N-PE by means of single cables and remote lead
Fig. 11: Insulation test between L-PE and N-PE by means of shuko plug
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