HT XL423 User manual

Copyright HT ITALIA 2021 Release EN 2.00 - 18/06/2021
ENGLISH
User manual

XL423 - XL424
EN - 1
TABLE OF CONTENTS
1.SAFETY PRECAUTIONS AND PROCEDURES .............................................................2
1.1Preliminary instructions ......................................................................................................... 2
1.2During use ............................................................................................................................. 3
1.3After use ................................................................................................................................ 3
1.4Overvoltage categories - definitions ...................................................................................... 3
2GENERAL DESCRIPTION ..............................................................................................4
2.1Introduction............................................................................................................................ 4
2.2Functions............................................................................................................................... 4
3PREPARATION FOR USE ..............................................................................................5
3.1Preliminary checks ................................................................................................................ 5
3.2Power supply......................................................................................................................... 5
3.3Storage.................................................................................................................................. 5
4OPERATING INSTRUCTIONS........................................................................................6
4.1Instrument description ........................................................................................................... 6
4.2Keyboard ............................................................................................................................... 6
5INITIAL SETTINGS .........................................................................................................6
5.1Date, Time and Measuring Interval ....................................................................................... 6
6OPERATIVE INSTRUCTIONS ........................................................................................7
6.1Using the instrument in a Single Phase system .................................................................... 7
6.2Using the instrument in a Three Phase 4-wires system ........................................................ 9
6.3Using the instrument in a Three Phase 3-wires system ...................................................... 11
7LED MESSAGE DESCRIPTION ...................................................................................13
8CONNECTION OF INSTRUMENT TO PC ...................................................................13
9MAINTENANCE ............................................................................................................14
9.1General information............................................................................................................. 14
9.2Battery replacement ............................................................................................................ 14
9.3Cleaning .............................................................................................................................. 14
9.4End of life ............................................................................................................................ 14
10TECHNICAL SPECIFICATIONS ...................................................................................15
10.1Characteristics..................................................................................................................... 15
10.1.1Reference guidelines .................................................................................................................. 15
10.1.2General data ............................................................................................................................... 15
10.2Environmental conditions .................................................................................................... 15
10.2.1Climatic conditions ...................................................................................................................... 15
10.3Standard accessories.......................................................................................................... 16
10.1Optional accessories ........................................................................................................... 16
11SERVICE.......................................................................................................................17
11.1Warranty conditions............................................................................................................. 17
11.2After-sale service................................................................................................................. 17

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1. SAFETY PRECAUTIONS AND PROCEDURES
This instrument has been designed in compliance with IEC/EN61010-1 directive. For your
own safety and to avoid damaging the instrument we suggest you follow the procedures
hereby prescribed and read carefully all the notes preceded by the symbol .
CAUTION
Should you fail to keep to the prescribed instructions you could damage the
instrument and/or its components or endanger your safety.
Take extreme care of the following conditions while taking measurements:
Do not use the instrument in presence of explosive gas (material), combustible gas
(material), steam or dust.
Do not touch the circuit under test even though you are not taking measurements.
Do not use the instrument if it seems to be malfunctioning (i.e. if you notice
deformations, breaks, leakage of substances and so on).
The below symbols are used:
Caution: refer to the instruction manual; an improper use may damage the
instrument or its components
Dangerous high voltage: risk of electrical shocks
Double insulated instrument
AC voltage and current
1.1 PRELIMINARY INSTRUCTIONS
It can be used for VOLTAGE measurements up to 600V AC on installations with
overvoltage category CAT III 600V~between inputs and ground.
Please use the standard safety precautions aimed at:
Protecting you against dangerous electric currents.
Protecting the instrument against incorrect operations.
Do not test circuits exceeding the voltage limits.
If possible de-energize the plant under test before connecting the instrument. Take all
safety precautions before taking actions on the plant.
Do not perform any test under environmental conditions exceeding the limits indicated
in this manual (see § 10.2)
Make sure that batteries are correctly installed.
Only the accessories supplied with the instrument guarantee compliance with the
safety standards. They must be under good conditions and must be replaced, if
necessary, with identical models.

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1.2 DURING USE
Carefully read the below recommendations and instructions:
CAUTION
No compliance with warnings and/or instructions may cause damage to
the tester or its components or injure the operator
During a measurement never touch any unused terminal.
1.3 AFTER USE
If you expect not to use the instrument for a long period of time remove the batteries
and strictly follow the indications at § 9.2.
1.4 OVERVOLTAGE CATEGORIES - DEFINITIONS
IEC/EN61010-1 (Safety requirements for electrical equipment for measurement, control
and laboratory use, Part 1: General requirements) defines what a measurement category
(usually called “overvoltage category”) is. At § 6.7.4: Measuring circuits you read:
(OMISSIS)
Circuits are divided into the following measurement categories:
Measurement category IV is for measurements performed at the source of low
voltage installations.
Examples are electricity instruments and measurements on primary overcurrent protection
devices and ripple control units.
Measurement category III is for measurements performed in the building installation
Examples are measurements on distribution boards, circuit breakers, wiring, including cables,
bus-bars, junction boxes, switches, socket-outlets in the 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 norm requires that the transient withstanding capability of the equipment is made
known to the user.

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2 GENERAL DESCRIPTION
2.1 INTRODUCTION
The instrument was designed to grant the user the utmost safety conditions thanks to a
new concept assuring double insulation and overvoltage CAT III 600V~ between inputs
and to ground.
2.2 FUNCTIONS
This manual is referred to two models: XL423 and XL423. Where not expressly indicated
the characteristics are common for both models. XL423 can recording a single voltage in
single-phase or three-phase plant. XL424 can recording up to 3 voltages simultaneously
in single-phase or three-phase plant.
The instrument can monitor a plant for a long time thanks to a sophisticated memory-
managing algorithms. More exactly, the instrument uses the following sampling periods:
Measuring Interval XL423 – Autonomy (days) XL424 – Autonomy (days)
1s 5 1.5
6s 34 8
30s 170 42
1min 364 (*) 91
5min 1820 (*) 455 (*)
(*) Depending on batteries autonomy
The instrument starts each recording using the Measuring Interval set through PC
management software (see § 8). Just before the event of full memory, the instrument
applies the successive measuring interval to all the memory, thus getting more free
memory locations. The instrument continues storing data according to the new sampling
period.

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3 PREPARATION FOR USE
3.1 PRELIMINARY CHECKS
This instrument has been checked mechanically and electrically before shipment. All
precautions have been taken to assure that the instrument reaches you under perfect
conditions. However, it is advisable to carry out a rapid check in order to detect any
possible damage, which might have occurred during transport. Check the accessories
contained in the packaging to make sure they are the same as reported in § 11.
3.2 POWER SUPPLY
The instrument is powered by 2x1.5V type AA LR06 alkaline batteries. For battery
replacement please follow procedure described at § 9.2.
CAUTION
After replacing batteries the instrument remains ON also if STATUS and
ALARM LED are OFF. Pressing START/STOP key you activate or disable
recordings only.
During a recording the blinking ALARM LED every 3 seconds means a low
battery status.
3.3 STORAGE
In order to guarantee the accuracy of measurements, after a period of storage under
extreme environmental conditions wait until the instrument stabilizes within the listed
operating conditions (see § 10.2).

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4 OPERATING INSTRUCTIONS
4.1 INSTRUMENT DESCRIPTION
CAPTION:
1. Phase voltage Inputs
2. COM input
3. “STATUS" LED
4. "ALARM" LED
5. RS232 port
6. START/STOP key
Fig. 1: Instrument description
4.2 KEYBOARD
LED “STATUS” blinks every time the START/STOP key is pressed.
5 INITIAL SETTINGS
5.1 DATE, TIME AND MEASURING INTERVAL
It’s possible to set measuring interval as well as date and time by using the management
software. This program enables to:
Set the measuring interval
Control data and time of the instrument’s internal clock
Set instrument date and time.
Check battery status
How to operate:
1. Connect the instrument to PC COM using included serial cable.
2. Run TopView software and open the “PC-Instrument Connection” section
3. Perform the detection of the instrument by using the “Find the instrument” or
“Autoset” keys
4. Select the “Configure the instrument” command and press the “Next” key in order to
set date/time in the instrument and the measurement interval in the “Integrated
Period” field selecting values 1s, 6s, 30s, 1min or 5min
5. Confirm with “Send” command.
CAUTION
The instrument could keep the data stored even without batteries
The set date and time don’t get lost provided that the battery replacement
takes less than 2 minutes.

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6 OPERATIVE INSTRUCTIONS
6.1 USING THE INSTRUMENT IN A SINGLE PHASE SYSTEM
CAUTION
The Instrument can be used on installation with overvoltage CAT III 600V~
between the inputs and to ground. Do not attempt to take any voltage
measurement exceeding the limits indicated in this manual. Exceeding the
limits could cause electrical shock or damage to the instrument.
Fig. 2: Instrument’s connection in single phase system
CAUTION
De-energize the plant under test before connecting the instrument. Take all
the safety precautions before taking actions on the plant.
1. De-energize the plant under test before connecting the instrument.
2. Insert alligator clips in the safety banana test leads.
3. Connecting alligator clips in the plant as indicated in Fig. 2.
4. Re-energize the plant under test.
5. How to start a Recording:
If no recording was performed or if the recording data had been already downloaded
to a PC, press the START/STOP key for 3 seconds. The STATUS LED will be
blinking for the same time, then light will become stable for 1 second and the
instrument will start the recording
If the recording data had not been already downloaded to a PC and the operator
wants to overwrite these data, press the START/STOP key for 6 seconds. The
STATUS LED will be quickly blinking during the key pressing for the same time, then
the LED will become stable for 1 second and the instrument will start the recording.
The old recording will be deleted and overwritten by the new one. The
instrument will wait for the next minute beginning (second=00) and the STATUS LED
will get a double blinking. After that the recording starts and the STATUS LED will
blink every 3 seconds. The instrument is storing the data.

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6. During a Recording:
A 3 seconds blinking of STATUS LED means that the recording is active and the
instrument is storing the data.
A 3 seconds blinking of ALARM LED means that the batteries are low. During a
recording any RS232 communication is possible.
During Recording operations RS-232 serial communications to PC are not
possible.
7. Stop a Recording:
To stop a Recording press START/STOP key and keep it pressed for 3 seconds.
The STATUS LED will quickly blink three times and the instrument will stop
recording and then stop blinking.
For more details about blinking of STATUS and ALARM LED meanings, please refer to the
§ 7.

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6.2 USING THE INSTRUMENT IN A THREE PHASE 4-WIRES SYSTEM
CAUTION
The Instrument can be used on installations with overvoltage CAT III 600V~
between the inputs and to ground. Do not attempt to take any voltage
measurements exceeding the limits indicated in this manual. Exceeding the
limits could cause electrical shock or damage to the instrument.
Fig. 3: Instrument’s connection in three phase 4-wires system
CAUTION
De-energize the plant under test before connecting the instrument. Take all
safety precautions before taking actions on the system.
1. De-energize the plant under test before connecting the instrument.
2. Inserting alligator clips in the safety banana test leads.
3. Connecting alligator clips to the plant as indicated in Fig. 3.
4. Re-energize the plant under test .
5. How to start a Recording:
If no recording was performed or if the recording data had been already downloaded
to a PC, press START/STOP key for 3 seconds. The STATUS LED will be lighting
for the same time, then will become stable for 1 second and the instrument will start
recording
If the recording data had not been already downloaded to a PC and the operator
wants to overwrite these data, press the START/STOP key for 6 seconds. The
STATUS LED will be quickly blinking for the same time during key pressing, then the
LED will become stable for 1 second and the instrument will start recording. The old
recording will be deleted and overwritten by the new one. The instrument will
wait for the next minute beginning (second=00) and the STATUS LED will double
blink. After that the recording will start and the STATUS LED will blink every 3
seconds. The instrument will store the data.

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6. During a Recording:
A 3 seconds blinking of STATUS LED means that the recording is active and the
instrument is storing data.
A 3 seconds blinking of ALARM LED means that the batteries are low. During a
recording any RS232 communication is possible.
During Recording operations RS-232 serial communications to PC are not
possible.
7. Stop a Recording:
To stop a Recording press START/STOP key and keep it pressed for 3 seconds.
The STATUS LED will quickly blink three times and the instrument will stop the
recording and then stop blinking.
For more details about the blinking of STATUS and ALARM LED meanings, please refer to
the § 7.

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EN - 11
6.3 USING THE INSTRUMENT IN A THREE PHASE 3-WIRES SYSTEM
CAUTION
The Instrument can be used on installation with overvoltage CAT III 600V~
between the inputs and to ground. Do not attempt to take any voltage
measurement exceeding the limits indicated in this manual. Exceeding the
limits could cause electrical shock or damage to the instrument.
Fig. 4: Instrument’s connection in three phase 3-wires plant
CAUTION
De-energize the plant under test before connecting the instrument. Take all
safety precautions before taking actions on the system.
1. De-energize the plant under test before connecting the instrument.
2. Insert alligator clips into the safety banana test leads.
3. Connect alligator clips into the plant as indicated in Fig. 4.
4. Re-energize the plant under test.

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5. How to start a Recording:
If no recording was performed or if the recording data had been already downloaded
to a PC, press the START/STOP key for 3 seconds. The STATUS LED will be
lighting for the same time, than will become stable for 1 second and the instrument
will start recording.
If the recording data had not been already downloaded to a PC and the operator
wants to overwrite these data, press the START/STOP key for 6 seconds. The
STATUS LED will quickly blink for the same time during key pressing, then the LED
will become stable for 1 second and the instrument will start recording. The old
recording will be deleted and overwritten by the new one. The instrument will
wait for the next minute beginning (second=00) and the STATUS LED will double
blink. After that the recording starts and the STATUS LED will blink every 3 seconds.
The instrument is storing the data.
6. During a Recording:
A 3 seconds blinking of STATUS LED means that the recording is active and the
instrument is storing the data.
A 3 seconds blinking of ALARM LED means that the batteries are low. During a
recording any RS232 communication is possible.
During Recording operations RS-232 serial communications to PC are not
possible.
7. Stop a Recording:
To stop a Recording press START/STOP key and keep it pressed for 3 seconds.
The STATUS LED will quickly blink three times and the instrument will stop the
recording and then stop blinking.
For more details about blinking of STATUS and ALARM LED meanings, please refer to the
§ 7.

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7 LED MESSAGE DESCRIPTION
For the STATUS and ALARM LED messages please refer to the following table:
LED START/STOP Key Light Description
STATUS Kept pressed 3
seconds at least On for 1 second
Recording process correctly started.
The previous recorded data were
transferred to a PC
STATUS Kept pressed 6
seconds at least
6 times blinking
after 1 second on
Recording process correctly started.
The previous recorded data were not
transferred to a PC and were lost
STATUS Not pressed 2 times blinking
every 3 seconds
Waiting for the next minute
(seconds=00)
STATUS Not pressed 1 time blinking
every 3 seconds Recording in progress
STATUS Pressed 3 times blinking The recording process was stopped
ALARM Not relevant 1 time blinking
every 3 seconds
Low batteries. Stop the recording,
transfer of data to a PC and replace
batteries
8 CONNECTION OF INSTRUMENT TO PC
The connection of the instrument to a PC is possible through a serial cable supplied with
the instrument. To download data to the PC (after installation of management software)
keep to the below procedure:
1. Connect the serial cable to the instrument serial port and to a RS232 COM port of the
PC.
2. Run TopView software and open the “PC-Instrument Connection” section
3. Perform the detection of the instrument by using the “Find the instrument” or
“Autoset” keys
4. Select the “Download data” command and press the “Next” key
CAUTION
During Recording operations RS-232 serial communications to PC are
not possible.
5. Select the recording and click on Download key to start download procedure. A
dialogue box displays the recording stored in the instrument’s memory. By choosing
the “Download” command the data transfer procedure will start.
6. At the end of the download the “Recording analysis” section will automatically start.
For more details see the HELP on line of TopView software

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9 MAINTENANCE
9.1 GENERAL INFORMATION
This instrument is a precision instrument. Whether in use or in storage, please do not
exceed the specifications to avoid any possible damage or danger during use. Do not
place this instrument under high temperature and/or humidity or expose to direct sunlight.
For long term storing, remove the batteries to avoid leakage of battery fluid that can
damage the internal components.
9.2 BATTERY REPLACEMENT
A blinking of ALARM LED for 3 seconds means that the batteries are low. Stop the
recording and replace the batteries with a new set. The management software allows the
operator to verify the batteries’ status.
CAUTION
The instrument could keep the data stored even without batteries. The set
date and time don’t get lost provided that the battery replacement takes
less than 2 minutes.
CAUTION
Only experts and trained technicians should perform this operation. Remove
the flexible head from the conductor under test before replacing the
batteries.
1. Stop the recording (if necessary), remove the flexible heads from the conductors under
test and transfer the stored data to a PC.
2. Remove the covers on the bottom side of the instrument using a screwdriver in the
proper positions (1) and unscrew the 4 fixing screws (see Fig. 5).
Fig. 5: Battery replacement
3. Open the box and unscrew the cover’s fixing screw of the battery housing.
4. Replace the batteries with a new set of the same type (see § 10.1.2). Close the battery
housing with the screw, reinsert the screws, screw them and reinsert the plastic covers.
5. Do not throw flat batteries in the environment after use.
9.3 CLEANING
To clean the instrument, use a soft dry cloth. Never use a wet cloth, solvents or water, etc.
9.4 END OF LIFE
CAUTION: this symbol indicates that equipment and its accessories shall be
subject to a separate collection and correct disposal.

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10 TECHNICAL SPECIFICATIONS
10.1 CHARACTERISTICS
Accuracy is calculated as ± [%rdg + (dgt*resolution)] referred to 23°C ± 5°C, <60%RH.
AC TRMS VOLTAGE MEASUREMENT
Range Resolution Accuracy
0 600V 0.1V (1%rdg +2dgt)
Note: The instrument will null readings lower than 2V
Crest Factor max: 2
Frequency (Hz): 506%, 606%
Conversion mode: TRMS
Bandwidth: 3200Hz
Sampling frequency: 64 samples each 20ms
Memory size: 1Mbyte
Sampling period: 1s, 6s, 30s, 1min, 5min
Serial port: RS232
10.1.1 Reference guidelines
Safety: IEC/EN61010-1
EMC: IEC/EN61326-1
Insulation: double insulation
Pollution degree: 2
Measurement category: CAT III 600V~ between inputs and to ground
10.1.2 General data
Mechanical characteristics
Dimensions (L x W xH): 120 x 80 x43mm (5 x 3 x 2in)
Test leads length: approx 2.6m (7.5ft)
Weight (including batteries): approx 0.5kg (1lv)
Protection index: IP65 (RS232 connector Closed)
Power supply
Battery type: 2x1.5V alkaline type AA LR06
Battery life: > 6 months (with charged batteries)
10.2 ENVIRONMENTAL CONDITIONS
10.2.1 Climatic conditions
Reference temperature: 23°C ± 5°C (73°F ± 41°F)
Operating temperature: -20°C 60°C (-4°F 140°F)
Operating humidity: 100%RH (RS232 connector closed)
Storage temperature: -20°C ÷ 60°C (-4°F 140°F)
Storage humidity: 100%RH
Max height of use: 2000m (6562ft)
This instrument complies with the requirements of Low Voltage Directive
2014/35/EU (LVD) and of EMC Directive 2014/30/EU
This instrument complies with the requirements of 2011/65/EU (RoHS) directive and
2012/19/EU (WEEE) directive

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10.3 STANDARD ACCESSORIES
Description Code
Adhesive Velcro 50 x 70 cm VELCRO
Set of 2 alligator clips B/B (XL423 only) KITXL423C
Set of 4 alligator clips B/B/R/G (XL424 only) KITXL424C
Management software + serial cable C2004 TOPVIEW2004
Carrying bag BORSA2000
Batteries
User manual YAMUM0010HT0
10.1 OPTIONAL ACCESSORIES
Description Code
RS-232/USB adapter C2009

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EN - 17
11 SERVICE
11.1 WARRANTY CONDITIONS
This equipment is guaranteed against any material fault or manufacturer’s defect, in
accordance with the general conditions of sale. During the warranty period (one year),
faulty parts may be replaced, while the manufacturer reserves the right to decide either to
repair or replace the product. In the event of returning the equipment to the after-sales
service or to a regional branch, the transport charges are up to the customer. The
returning must be agreed in advance with the supplier or local distributor. A report
indicating the reasons for returning and defects detected must be joined to the instrument.
The manufacturer will not be responsible for any damage against persons or things.
The warranty cannot be applied under the following circumstances:
Accessories and batteries (not covered by warranty).
Improper use of the equipment or combination of the instrument with incompatible
equipment.
Damages caused by incorrect shipping procedures.
Damages caused by repair/service trials of unauthorized people.
Modifications to the equipment without explicit authorization of our Technical Dept.
Adaptation to a particular application not provided for by the definition of the equipment
or by the instruction manual.
The contents of this manual may not be reproduced in any form whatsoever without prior
agreement.
Our products are patented. The logotypes are registered. We reserve the right to
modify characteristics and prices as part of technological developments which
might be required.
11.2 AFTER-SALE SERVICE
If the equipment doesn’t work properly please check the battery condition and replace
them if necessary before contacting our Service Dept. If the problem persists check if your
operating procedure complies with the one described in this manual.
In the event of returning the equipment to the after-sales service or to a regional branch,
the shipping charges are up to the customer. The returning must be agreed in advance
with the supplier or local distributor. A report indicating the reasons for returning and
defects detected must be joined to the instrument. The manufacturer will not be
responsible for any damage against persons or things.