HT Italia GSC53N User manual

Copyright HT ITALIA 2012 Release EN 1.08 - 28/02/2012
GSC53N - GSC57 - ZG47
Instruction Manual

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INDEX
1. SAFETY PRECAUTIONS AND PROCEDURES .......................................................................................... 4
1.1. GENERAL................................................................................................................................................................ 4
1.2. Preliminary Instruction ............................................................................................................................................. 4
1.3. During Use............................................................................................................................................................... 5
1.4. After Use.................................................................................................................................................................. 5
2. GENERAL DESCRIPTION ........................................................................................................................... 6
2.1. Introduction .............................................................................................................................................................. 6
2.2. Functions ................................................................................................................................................................. 6
3. PREPARATION FOR USE ........................................................................................................................... 8
3.1. Initial Control............................................................................................................................................................ 8
3.2. Power Supply........................................................................................................................................................... 8
3.3. Calibration................................................................................................................................................................ 9
3.4. Storage .................................................................................................................................................................... 9
4. INSTRUMENT DESCRIPTION ....................................................................................................................10
4.1. Display Description ................................................................................................................................................ 11
4.2. Initial Screen .......................................................................................................................................................... 11
4.3. Backlight function................................................................................................................................................... 11
5. INITIAL SETTINGS......................................................................................................................................12
5.1. How to Adjust the Contrast .................................................................................................................................... 12
5.2. How to Set Date and Time..................................................................................................................................... 12
5.3. How to Set the Language ...................................................................................................................................... 12
5.4. Reset ..................................................................................................................................................................... 13
6. SAFETY TEST FUNCTIONS.......................................................................................................................14
6.1. LOW : Continuity Test with 200mA Test Current................................................................................................. 14
6.1.1. Calibrating the test leads ("CAL" Mode) ..........................................................................................................................15
6.1.1.1. Procedure to reset test leads’ calibration parameters...................................................................... 16
6.1.2. Measurement Procedure .................................................................................................................................................17
6.1.3. Results of "AUTO" mode .................................................................................................................................................18
6.1.4. Results of "RT+" and "RT-" modes ..................................................................................................................................18
6.1.5. "AUTO", RT+", "RT-" faulty cases....................................................................................................................................19
6.2. M: Insulation resistance Measurement with 50V, 100V, 250V, 500V, 1000V Test Voltage...................................... 21
6.2.1. Measurement Procedure .................................................................................................................................................21
6.2.2. Results of "MAN" mode ...................................................................................................................................................23
6.2.3. Results of "TMR" mode....................................................................................................................................................24
6.2.4. "MAN" and "TIMER" mode faulty cases...........................................................................................................................25
6.3. RCD: Test on "A" and "AC" RCDs Type ................................................................................................................ 26
6.3.1. Tripping times for the general and selective RCDs..........................................................................................................28
6.3.2. Measurement procedure..................................................................................................................................................29
6.3.2.1. Results of "x½" mode ...................................................................................................................... 30
6.3.2.2. Results of "x1, x2, x5" mode............................................................................................................ 31
6.3.2.3. Results of "AUTO" mode ................................................................................................................. 32
6.3.2.4. Results of "RAMP " mode .......................................................................................................... 33
6.3.2.5. Results of " RA" mode .................................................................................................................. 34
6.3.3. RCD Faulty cases............................................................................................................................................................35
6.3.3.1. Connection troubles......................................................................................................................... 35
6.3.3.2. RCD tripping "faulty cases" ............................................................................................................. 37
6.4. LOOP : Measurement of Line Impedance, Fault loop Impedance, Prospective Short Circuit Current
Calculation and Phase Sequence Indicator ........................................................................................................... 40
6.4.1. High resolution Impedance measurement (0.1m ) ........................................................................................................40
6.4.2. Measurement procedure and results of "P-N" mode .......................................................................................................41
6.4.3. Measurement procedure and results of "P-P" mode........................................................................................................43
6.4.4. Measurement procedure and results of "P-PE" mode .....................................................................................................45
6.4.5. Measurement procedure and results of " RA" mode ...................................................................................................47
6.4.6. Measurement procedure and results of " " mode.......................................................................................................49
6.4.7. LOOP Faulty Cases ..................................................................................................................................................50

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6.5. EARTH: Soil Resistance and Resistivity Measurements ....................................................................................... 55
6.5.1. Measurement procedure and results of "2-W"and "3-W" mode.......................................................................................56
6.5.2. Measurement procedure and results of " " mode ...........................................................................................................58
6.5.3. "2-W", "3-W" and " " faulty cases....................................................................................................................................59
6.6. LOW10A: Continuity Test with 10A Test Current (GSC57 ONLY)......................................................................... 62
6.6.1. Measurement Procedure and Result of "RMEAS" mode.................................................................................................63
6.6.2. Measurement Procedure and Result of "VDROP" mode.................................................................................................64
6.6.3. "RMEAS" and "VDROP" faulty cases ..............................................................................................................................65
7. AUX: MEASUREMENT WITH EXTERNAL PROBES.................................................................................67
7.1. ENVIRONMENTAL PARAMETER AND LEAKAGE CURRENT: REAL TIME MEASUREMENT .......................... 68
7.2. ENVIRONMENTAL PARAMETER AND LEAKAGE CURRENT: RECORDING .................................................... 70
7.2.1. AUX Basic setting: RECORDER CONFIG.......................................................................................................................70
7.2.2. RECORDING: setting of Typical Configurations..............................................................................................................72
8. ANALYSER .................................................................................................................................................73
8.1. Basic Setting: ANALYSER CONFIG...................................................................................................................... 74
8.1.1. How to set the type of electrical system under test..........................................................................................................74
8.1.2.How to set the fundamental frequency ............................................................................................................................74
8.1.3. How to set the current range............................................................................................................................................74
8.1.4. How to set the Clamp Type..............................................................................................................................................75
8.1.5. How to set the value of the transformer voltage ratio (TV RATIO) ..................................................................................75
8.1.6. How to enable/disable the password ...............................................................................................................................75
8.2. Basic Setting: RECORDER CONFIG..................................................................................................................... 76
8.3. ANALYSER FUNCTIONS...................................................................................................................................... 83
8.4. "VOLTAGE" Function............................................................................................................................................. 84
8.4.1. Symbols ...........................................................................................................................................................................84
8.4.2. "METER" mode................................................................................................................................................................85
8.4.3. "HARM" mode..................................................................................................................................................................86
8.4.4. "WAVE" mode..................................................................................................................................................................87
8.5. "CURRENT" Function ............................................................................................................................................ 88
8.5.1. Symbols ...........................................................................................................................................................................88
8.5.2. “METER" mode................................................................................................................................................................89
8.5.3. “HARM" mode..................................................................................................................................................................90
8.5.4. "WAVE" mode..................................................................................................................................................................91
8.6. "POWER" Function................................................................................................................................................ 92
8.6.1. Symbols ...........................................................................................................................................................................92
8.6.2. "METER" mode................................................................................................................................................................93
8.6.2.1. PEAK ENERGY DEMAND .............................................................................................................. 94
8.6.3. "WAVE" mode..................................................................................................................................................................95
8.7. "ENERGY" Function .............................................................................................................................................. 96
8.7.1. Symbols ...........................................................................................................................................................................96
8.7.2. "METER" mode................................................................................................................................................................97
8.8. Measuring Procedures........................................................................................................................................... 98
8.8.1. Using the Instrument in a Single Phase System..............................................................................................................98
8.8.2. Using the Instrument in a Three Phase 4 Wire System ...................................................................................................99
8.8.3. Using the Instrument in a Three Phase 3 Wire System .................................................................................................101
9. SAVING RESULTS....................................................................................................................................103
9.1. Saving Safety Test Results.................................................................................................................................. 103
9.2. Saving Displayed Values of ANALYSER Function .............................................................................................. 103
10.RECORDINGS...........................................................................................................................................104
10.1.Start a Recording................................................................................................................................................. 104
10.2.Setting Typical Configurations ............................................................................................................................. 105
10.2.1. Default Configuration .....................................................................................................................................................105
10.2.2. Typical Configurations ...................................................................................................................................................106
10.3.During A Recording.............................................................................................................................................. 110
10.3.1. MENU key......................................................................................................................................................................110
10.3.2. Rotary Switch during a recording...................................................................................................................................111
10.4.Stopping A Recording Or An Energy Measurement ............................................................................................ 112
11.INSTRUMENT'S MEMORY .......................................................................................................................113
11.1.SAFETY TEST MEMORY.................................................................................................................................... 113

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11.2.ANALYSER MEMORY......................................................................................................................................... 114
12.CONNECTING THE INSTRUMENT TO A PC...........................................................................................115
13.CONNECTION THROUGH BLUETOOTH PROTOCOL............................................................................115
14.MAINTENANCE.........................................................................................................................................116
14.1.General Instruction............................................................................................................................................... 116
14.2.Battery Replacement ........................................................................................................................................... 116
14.3.Instrument Cleaning............................................................................................................................................. 116
14.4.END OF LIFE....................................................................................................................................................... 116
15.TECHNICAL SPECIFICATIONS ...............................................................................................................117
15.1.Technical Features .............................................................................................................................................. 117
15.1.1. Safety Test functions .....................................................................................................................................................117
15.1.2. ANALYSER and AUX functions .....................................................................................................................................119
15.2.Standards ............................................................................................................................................................ 120
15.2.1. General ..........................................................................................................................................................................120
15.2.2. EMC...............................................................................................................................................................................120
15.2.3. Safety Test.....................................................................................................................................................................120
15.2.4. ANALYSER....................................................................................................................................................................120
15.3.General Specifications......................................................................................................................................... 121
15.3.1. Mechanical Data ............................................................................................................................................................121
15.3.2. Power supply .................................................................................................................................................................121
15.3.3. Display ...........................................................................................................................................................................121
15.3.4. Memory..........................................................................................................................................................................121
15.4.ENVIRONMENT .................................................................................................................................................. 121
15.5.ACCESSORIES................................................................................................................................................... 122
16.SERVICE ...................................................................................................................................................124
16.1.WARRANTY CONDITIONS................................................................................................................................. 124
16.2.SERVICE ............................................................................................................................................................. 124
17.PRACTICAL REPORTS FOR ELECTRICAL TESTS ...............................................................................125
17.1.Continuity Test on Protective Conductors............................................................................................................ 125
17.2.Insulation Resistance Measurement of The Electrical Installations (250Vdc, 500Vdc, 1000Vdc)........................ 127
17.3.Check of the Circuit Separation ........................................................................................................................... 130
17.4.Earth Resistance Measurement in TT Systems................................................................................................... 133
17.5.Working Test of Rcds (Rcd, Rcd/Dc, Rcd S, Rcd/Dc S) ...................................................................................... 134
17.6.Test of Rcd Tripping Time (Rcd, Rcd/Dc) ............................................................................................................ 135
17.7.Measurement of Short-Circuit Fault Impedance (Zpn, Zpp).................................................................................... 136
17.8.Fault Loop Impedance Measurement (Phase –Earth) ........................................................................................ 136
17.9.Earth Resistivity Measurement ............................................................................................................................ 137
17.10. Voltage Anomalies (Voltage Sag and Surge) .............................................................................................. 139
17.11. Voltage and current Harmonics................................................................................................................... 139
17.11.1. Theory..................................................................................................................................................................139
17.11.2. Limit values for harmonics ...................................................................................................................................141
17.11.3. Presence of harmonics: causes...........................................................................................................................141
17.11.4. Presence of harmonics: consequences ...............................................................................................................142
17.12. Power and Power Factor Definition............................................................................................................. 142
17.12.1. Conventions on powers and power factors..........................................................................................................144
17.12.2. 3 Phase 3 Wire System........................................................................................................................................145
17.13. Measuring Method: outlines ........................................................................................................................ 146
17.13.1. Integration periods ...............................................................................................................................................146
17.13.2. Power factor calculations .....................................................................................................................................146
18.APPENDIX 1 –MESSAGES DISPLAYED ................................................................................................147
19.APPENDIX 2 –RECORDABLE PARAMETERS: SYMBOLS...................................................................148

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1. SAFETY PRECAUTIONS AND PROCEDURES
1.1. GENERAL
This apparatus conforms with safety standards EN61557 and EN61010-1 relating to
electronic measuring instruments.
WARNING
For your own safety as well as that of the apparatus you are recommended
to follow the procedures described in this instruction manual and carefully
read all the notes preceded by the symbol .
Strictly keep to the following instructions before and during measurements:
Do not take measurements in wet environments or dusty places.
Do not effect measurements in environments with explosive gas, fuels.
Keep you insulated from the object under test waiting for measuring.
Avoid any contact with exposed metal parts, ends of test leads not in use, circuits, etc.
Do not effect any measurement in case of unusual conditions of the instrument such as
deformation, breakage, leakage of substances, absence of display reading etc.
Do not use the External power supply adapter (code A0050, optional for GSC57) if you
notice deformation, or breakage in the case, in the wire or in the plugs.
Pay careful attention when measuring voltages exceeding 25V in particular places
(building yards, swimming pools, etc.) and 50V in ordinary places because of the risk of
electric shock.
Use only cables and accessories approved by HT ITALIA.
The following symbols are used in this manual:
Caution: refer to the instructions reported on this manual; improper use may
damage the apparatus or its components.

AC Voltage or Current.
Unidirectional pulsating Voltage or Current.
Rotary switch of the instrument.
1.2. PRELIMINARY INSTRUCTION
This instrument has been designed for use in environments with a pollution level 2 and
up to (and no more than) 2000 meters altitude.
It can be used for Safety Test on Installation with Overvoltage Category III 300V~
(phase to earth) and for voltage and current measurements on installations with
overvoltage category III 600 V~ phase to phase / 300 V~ phase to earth or CATII 350 V
phase to earth.

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Please keep to the usual safety standards aimed at:
Protecting against dangerous currents;
Protecting the instrument against incorrect operations.
Only the accessories supplied with the instrument guarantee compliance with the
safety standards. Accordingly, they must be in good conditions and, if necessary, they
must be replaced with identical models.
Do not take measurements on circuits exceeding the specified current and voltage
limits.
Before connecting cables, crocodiles and clamps to the circuit under test, make sure
that the right function has been selected.
Do not effect any measurement under environmental conditions beyond the limits
specified in paragraph 15.4.
Check that batteries are not weak and placed correctly.
Before connecting test leads to the circuit under test, check that rotary switch position
is correct.
1.3. DURING USE
Please read carefully the following recommendations and instructions:
WARNING
No compliance with the Warnings and/or Instructions may damage the
apparatus and/or its components or injure the operator.
Before selecting any function disconnect the test leads from the circuit under test.
When the instrument is connected to the circuit under test do not touch any unused
terminal.
Avoid to effect resistance measurements in the presence of external voltages; even
though the instrument is protected a too high voltage may cause malfunctions.
When measuring current, other currents located near the leads may affect the
measuring accuracy.
When measuring current, always position the wire in the very middle of the jaws in
order to obtain the highest accuracy.
A measured value remains constant if the "HOLD" function is active. Should you notice
that the measured value remains unchanged, disable the “HOLD” function.
WARNING
The symbol " " shows the battery charge: When it is completely black the
battery are full charge, while the " " symbol indicate weak batteries. When the
batteries are too low to execute the test the instrument will show a warning
message. In the case interrupt testing and replace batteries following the
procedure described under paragraph 14.2. The instrument is capable of
keeping the data stored even though batteries are not installed. The Instrument
Date and Time settings aren't lost if you change the batteries within 24hours.
1.4. AFTER USE
After use, turn off the instrument by pressing ON/OFF for a few seconds.
Remove batteries when the apparatus remains unused for long periods. Please follow
the storage instructions described at paragraph 15.4.

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2. GENERAL DESCRIPTION
2.1. INTRODUCTION
Dear Customer, we thank you for your patronage. The instrument you have just purchased
will grant you accurate and reliable measurements provided that it is used according to the
present manual’s instructions.
The instrument was designed to grant the user the utmost safety conditions thanks to a
new concept assuring double insulation and over voltage category III.
This instruction manual is referred to three models: GSC57, GSC53N and ZG47.
Differences among models are:
LOW 10A function performed by GSC57 model only.
Use of HTFLEX33 flexible clamps 1000A/3000A without any external control logic,
available with models GCS53N and ZG47.
2.2. FUNCTIONS
The instrument is able to perform eh following test:
LOW : Continuity Test of Protection and Equalising conductors with test current
higher than 200mA and open circuit voltage ranging from 4V to 24V.
M: Measurement of insulation resistance with DC test voltage 50V, 100V,
250V, 500V or 1000V.
RCD: Measurement on common and/or selective RCDs AC type ( ) and
A type ( ) of the following parameters:
Tripping time.
Tripping current.
Contact voltage (Ut).
Global earth resistance (Ra).
Under this mode the instrument can measure the overall earth
resistance without causing RCD tripping.
LOOP : Measurement of line and fault loop impedance with calculation of
prospective short circuit current, Measurement of fault loop impedance
between phase and earth and Global Earth resistance measurement
without RCD tripping and calculation of prospective short circuit
current, Indication of phase rotation sequence
EARTH Measurement of Earth Resistance and Resisivity using Earth rods.
LOW 10A: Continuity Test of Protection and Equalising conductors with test current
higher than 10A (GSC57 only).
AUX: Measurement and Recording of leakage current and environmental values
(temperature, humidity, Air Speed, illuminance and Sound level).
ANALYSER: The Instrument allows the following operations:
display in real time the electrical parameters of a single phase and
three-phase systems (with and without neutral wire) and the harmonic
analysis of voltages and currents.
conduct a direct Energy measurement (without memorizing).
memorize (pressing SAVE key) the sampled values of the
Parameters present at instrument input generating a "Smp" record
inside instrument memory. It will be possible to analyse the
memorized data ONLY by transferring it to a PC.

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record simultaneously (pressing the START key after a proper
setting): RMS values of voltages, currents, corresponding harmonics,
active, reactive and apparent powers, power factors and cos , active,
reactive and apparent energies, voltage anomalies (voltage sag and
surge) with 10ms resolution. It will be possible to analyse the
recorded data ONLY by transferring them to a PC.
record simultaneously (pressing the START key) values of Voltage
and Current values coming from test leads and Clamps, using
“Typical Configurations” with pre-programmed parameters inside
meter (see paragraph ).It will be possible to analyse the recorded
data ONLY by transferring them to a PC.
WARNING
Please note the difference between memorize and record. These terms
will be used repeatedly in this manual. Please focus on their definitions and
distinctions.

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3. PREPARATION FOR USE
3.1. INITIAL CONTROL
This instrument has been checked mechanically and electrically prior to shipment.
Any care has been taken to ensure that the instrument reaches you under safe conditions.
You are recommended, however, to carry our a rapid check to detect any possible
damage which might have been caused during transport. Should this be the case,
immediately contact HT Italia.
Check also that the packaging contains all the parts listed under paragraph 15.5. In case
of discrepancies contact the dealer.
In case you have to send the instrument back please follow the instructions reported in
paragraph 16.
3.2. POWER SUPPLY
The instrument can be powered by:
6 batteries 1.5V AA - LR6 series located in the compartment on the back of the
instrument (not included in the package). For battery life see paragraph 15.3.2.
an external power supply adapter (code A0050, optional for GSC57) to be used
only for ANALYSER and AUX function. We recommend You to use only A0050 HT
Power Supply adapter.
For your own safety it's not allowed to use the external power supply adapter during
Safety Test (LOW , M , RCD, LOOP, EARTH rotary Switch positions). If you press
the START button the Instrument will show the message "REMOVE POWER".
For batteries replacement please refer to paragraph 14.2.
The symbol shows the battery charge: If it is completely "black" the battery are full
charge, while the symbol indicate weak batteries. When the batteries are too low to
execute the test the instrument will show a warning message.
In the case interrupt testing and replace batteries following the procedure described under
paragraph 14.2. The instrument is capable of keeping the data stored even though
batteries are not installed. The Instrument Date and Time settings do not get lost if you
change the batteries within 24hours.

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WARNING
For recordings (ANALYSIS and AUX function) use ALWAYS the external
power supply adapter (code A0050, optional for GSC57) even the
instrument allows the operator to perform a recording using internal
batteries. If during a recording the external power supply adapter is de-
energised, the instrument will continue the recording using the internal
battery power until the batteries are exhausted (the data stored up to the
point the instrument shuts down won’t get lost). For this we recommend you
ALWAYS insert a new set of batteries before a long recording.
The instrument uses sophisticated algorithms to prolong the battery life. Particularly:
The instrument switches OFF the backlight Automatically after 5 seconds.
If the instrument is displaying in real time (and the external power supply adapter is not
connected), after about 5 minutes from the last key pressure or switch rotation the
instrument turns off automatically ("AUTOPOWER OFF" procedure).
If the instrument is recording or is measuring energy (and the external power supply is
not connected), after about 5 minutes from the last key pressure or switch rotation the
instrument starts a special procedure to save the batteries ("ECONOMY MODE"): the
instrument keeps recording but the display is turned off.
3.3. CALIBRATION
The instrument fulfils the technical specifications listed in this manual. The performance of
the specifications are guaranteed for one year.
3.4. STORAGE
In order to grant the accuracy of the measurements, after a period of storage in extreme
environmental conditions, wait for the time necessary so that the apparatus is back to
normal measuring conditions (see environmental specifications listed in paragraph 15.4).

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4. INSTRUMENT DESCRIPTION
SAVE
F1 F3 F4 F2
HOLD
ENTER
MENU ESC
START
STOP
1
2
3
LEGEND:
1. Display
2. Function Keys
3. Rotary switch
Front panel of the Instrument
Multifunction Keys.
ON/OFF and backlight key. Press it for few seconds to switch OFF the
instrument, press it briefly to activate the backlight function.
This key start (and stop). the measurement.
This key allows to save the result displayed.
This key has a double function: it is the confirmation key inside the
configuration menu and it allows to freeze the displayed results using the
ANALYSER function.
This key open the General Configuration Menu.
This key quit the .modification in the configuration menu or the selected
working mode.
F1
START
STOP
HOLD
ENTER
MENU
F2
F4
F3
ON/OFF
SAVE
ESC

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4.1. DISPLAY DESCRIPTION
The display is a graphic module with a resolution of128 x 128 pixels
The first line of the display shows date and time. If not correct, you can set the exact ones
according to the procedure described at paragraph 5.2.
On the top right corner of the display you can always see the battery indicator and, if the
external power supply adapter (code A0050) is connected, the corresponding symbol.
LOW 05.06.01
27.09.00 17:35:12
----
R+ R-
---- ----
---mA ---mA
AUTO 0.11
VOLTAGE
V1 = 230.2 V
V2 = 230.5 V
V3 = 230.6 V
V12 = 384.2 V
V23 = 385.4 V
V31 = 383.7 V
freq = 50.0 Hz
Phseq = 123
FUNC
CAL
HARM
WAVE
These symbols will be omitted in the following illustrations.
4.2. INITIAL SCREEN
When turning on the instrument by pressing ON/OFF, this screen will appear for a few
seconds:
G S C 5 3 N
H T I T A L I A
SN:00000000 V: X.XX
Baud Rate 57600
CALIBRATION DATE
01.01.02
GSC 57
H T I T A L I A
SN:00000000 V: X.XX
Baud Rate 57600
CALIBRATION DATE
01.01.02
ZG 47
H T I T A L I A
SN:00000000 V: X.XX
Baud Rate 57600
CALIBRATION DATE
01.01.02
Here you can see:
serial number of the instrument (SN.:)
firmware software release (V.X.XX:)
transmission speed through serial RS232 (Baud Rate)
calibration date (CALIBRATION:)
4.3. BACKLIGHT FUNCTION
When instrument is turned on, pressing briefly the ON button, the backlight will be
enabled. The light will be automatically turned off after 5 seconds.
If the batteries are too low the instrument will disable automatically the backlight function.

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5. INITIAL SETTINGS
By pressing the MENU key the following screen will be displayed:
MENU GENERAL
SAFETY TEST MEMORY
ANALYSER MEMORY
RESET
ANALYSER CONFIG
RECORDER CONFIG
CONTRAST
DATE&TIME
LANGUAGE
It’s not possible to enter the MENU during a recording or a Real Time Energy
measurement. Pressing this button during a recording the display will show main recording
parameter (see paragraph 10.3)
5.1. HOW TO ADJUST THE CONTRAST
By pressing the keys F1 and F2, position the cursor on the CONTRAST item and confirm it
by pressing the ENTER key.
By pressing the keys F3 and F4, adjust the contrast (higher values correspond to a higher
contrast while lower values correspond to a lower contrast) and press the ENTER key to
SAVE the change or press ESC to quit the modification.
This setting will remain unchanged after turning off the instrument.
5.2. HOW TO SET DATE AND TIME
By pressing the keys F1 and F2, position the cursor on the DATE&TIME item and confirm
it by pressing the ENTER key.
The time is expressed as hh:mm (2 digit for hours, 2 digit for minutes) military time.
Press the ENTER key to SAVE the change or press ESC to quit the modification.
This setting will remain unchanged also after turning off the instrument.
5.3. HOW TO SET THE LANGUAGE
By pressing the keys F1 and F2, position the cursor on the LANGUAGE (EN) or LINGUA
(IT) item and confirm it by pressing the ENTER key.
By pressing the keys F1 and F2, position the cursor on the desired language and press the
ENTER key to SAVE the change or press ESC to quit the modification.
This setting will remain unchanged after turning off the instrument.

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5.4. RESET
This option re-establishes the initial settings of the instrument in ANALYSER function.
The RESET command re-establishes the limit value on Insulation measurement (see
paragraph 6.2) at 0.5M and test voltage at 500V.
The “not modified” parameter it is not modified by RESET command
The initial settings of the instrument consist of:
ANALYSER CONFIG:
System: 3PH4W
Frequency: not modified
Current range: not modified
Clamp type: not modified
Transforming ratio of voltmetric transformers: 1
Password: OFF
RECORDER CONFIG:
Start: MANU (the recording is started
at 00 sec mark on clock after pressing
the START/STOP key)
Stop: MANU
Integration period: 15min
Recording of harmonics: ON
Recording of Voltage anomalies (Sag and Surge: ON
Voltage Reference for Sag and Surge detection: 230V
Upper Limit for Sag and Surge detection: 6%
Lower Limit for Sag and Surge detection: 10%
Selected voltages: V1, V2, V3
Selected voltage harmonics: THD, 01, 03, 05, 07
Selected currents: I1, I2, I3, IN
Selected current harmonics: THD, 01, 03, 05, 07
CO-GENERATION: OFF
Powers, Pf and cos selected: Pt, P1, P2, P3
Qti, Q1i, Q2i, Q3i
Qtc, Q1c, Q2c, Q3c
St, S1, S2, S3
Pft, Pf1, Pf2, Pf3
dpft, dpf1, dpf2, dpf3
Energies: Eat, Ea1, Ea2, Ea3
Erit, Eri1, Eri2, Eri3
Erct, Erc1, Erc2, Erc3
The RESET command will not erase the instrument’s memory.

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EN - 14
6. SAFETY TEST FUNCTIONS
6.1. LOW : CONTINUITY TEST WITH 200mA TEST CURRENT
WARNING
Before carrying out the continuity test make sure that there is no voltage at the
ends of the conductor under test.
Turn the switch on LOW position.
This key permits to select one of the following measuring modes:
Mode "AUTO" (the instrument carries out two measurements with
reversed polarity and displays their average value). This mode is
recommended for the continuity test.
Mode "RT+" (measurement with positive polarity and possibility of setting
the duration time of the test). In this case the operator can set a
measuring time long enough to permit him to move the protective
conductors while the instrument is carrying out the test so detecting any
bad connection.
Mode "RT-" (measurement with negative polarity and possibility of setting
the duration time of the test). In this case the operator can set a
measuring time long enough to permit him to move the protective
conductors while the instrument is carrying out the test so detecting any
bad connection.
This key permits to execute the "CAL" mode (compensation of the resistance
of the cables used for the measurement).
WARNING
If the resistance is lower than 5(including the resistance of the calibration)
the continuity test is executed by the instrument with a test current higher than
200mA. If the resistance is higher than 5 the continuity test is executed by the
instrument with a current lower than 200mA.
N.B.
We recommend you to check the Calibration of the test leads before executing a
measurement according to next paragraph.

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6.1.1. Calibrating the test leads ("CAL" Mode)
1. Connect the black and blue test leads to B1 and B4 input terminals
respectively.
B2 B3 B4B1
Connection of instrument terminals during calibration procedure.
2. If the test leads supplied with the instrument are not long enough for the
measurement you can extend the blue cable.
3. Short-circuit the measuring cable ends making sure that the conductive parts of the
crocodiles make a good contact to each other (see previous picture).
4. Press the F2 key. The instrument carries out the calibration.
WARNING
Never disconnect the test leads when the message "MEASURING" is
displayed.
LOW 05.06.01
----
R+ R-
---- ----
---mA ---mA
AUTO 0.11
A numerical value
in this field means
that the instrument
has been
calibrated; this
value remains on
the display for
any further
measurement
even though the
unit is switched off
and on again.
FUNC
CAL
5. At the end of the test the result is stored and used as OFFSET (that is to say
that it is subtracted from any continuity test carried out) for all the
subsequent measurements.
Note: The instrument effects the calibration only if the resistance of the test leads is
lower than 5 .

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TEST LEADS Before each measurement always make sure that
the calibration is referred to the cables in use.
During a continuity test, if the resistance value free
of calibration (that is the resistance value less the
calibration offset value) is negative, the symbols
is displayed. Probably the calibration resistance
value stored in the instrument memory is not
referred to the cable in use, therefore a new
calibration must be effected.
6.1.1.1. Procedure to reset test leads’ calibration parameters

To cancel calibration
parameters it is
necessary to effect a
calibration procedure
with a resistance of
test leads higher than
5(for example with
open test leads). When
a cancellation is effected
the screen nearby is
displayed first, followed
by the screen below:
LOW 05.06.01
Message >99.9 :
means that the
instrument detected a
resistance higher
than 5 therefore it
will proceed with
Reset procedure.
>99.9
R+ R-
---- ----
---mA ---mA
AUTO 0.11
FUNC
CAL

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6.1.2. Measurement Procedure
1. Select the desired mode by means of the F1 key.
2. Connect the black and blue test leads to B1 and B4 input terminals respectively
B2 B3 B4B1
Connection of the test leads during LOW test.
3. If the cables supplied with the instrument are not long enough for the measurement
you can extend the blue cable.
4. Short-circuit the test leads making sure that the conductive parts of the crocodiles
make a good contact to each other. Press the START key. If the display doesn't
show 0.00 repeat the test leads calibration (see paragraph 6.1.1).
5. Connect the instrument terminals to the ends of the conductor under test (see
previous picture).
6. If the mode "RT+" or "RT-" was selected use the F3, F4 keys to set the
duration of the test.
7. Press the START key. The instrument will execute the measurement. In RT+/RT-
(Timer mode) you can press START key again if you want to stop the test before the
duration set is expired.
WARNING
Never disconnect the test leads when the message "MEASURING" is
displayed.
START
STOP

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6.1.3. Results of "AUTO" mode

At the end of the test, if
the average resistance
value Ravg is lower
than 5 the instrument
emits a double sound
signal indicating the
positive outcome of
the test and displays
one screen similar to the
screen alongside.
LOW 05.06.01
Average resistance value
(Ravg)
1.05
R+ R-
1.07 1.03
219mA 219mA
AUTO 0.11
Resistance values and
corresponding test current
got exchanging the
polarities of test leads
FUNC
CAL
The displayed result can be stored pressing the SAVE key twice (according to
paragraph 9.1).
6.1.4. Results of "RT+" and "RT-" modes

if a resistance value
RT+ or RT+ lower than
5 is detected, the
instrument emits a
double sound signal
indicating the positive
outcome of the test
displays one screen
similar to the screen
alongside.
LOW 05.06.01
Max Resistance value of
R+ or R-.
1.07
219mA
RT+ 0.11 TIME: 10s
Test current
Duration of the Test
FUNC
CAL
Note: We recommend to use crocodiles and to check if the crocodiles make a good contact
with the conductor under test. Indeed in this test the instrument gives as final result
the maximum measured value of R+ or R- and suing test leads instead of crocodiles
could give you faulty result due to faulty contact between the test leads and conductor
under test
The displayed result can be stored pressing the SAVE key twice (according to
paragraph 9.1).