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

XL423 - XL424
EN - 2
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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EN - 6
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.

XL423 - XL424
EN - 7
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.