HT HT60 User manual

Copyright HT ITALIA 2016 Release 1.00 - 08/01/2016
HT60
Manuale d'uso
User manual
Manual de instrucciones
Bedienungsanleitung
Manuel d’utilisation

Indice generale
General index
Índice general
Inhalt
Table des matiéres
ITALIANO ......................... IT - 1
ENGLISH .........................EN - 1
ESPAÑOL........................ES - 1
DEUTSCH.......................DE – 1
FRANÇAIS.......................FR - 1

Copyright HT ITALIA 2016 Version EN 1.00 - 08/01/2016
ENGLISH
User manual

HT60
EN - 1
Table of contents:
1.PRECAUTIONS AND SAFETY MEASURES...............................................................2
1.1.Preliminary instructions..................................................................................................... 2
1.2.During use......................................................................................................................... 3
1.3.After use............................................................................................................................ 3
1.4.Definition of Measurement (Overvoltage) category........................................................... 3
2.GENERAL DESCRIPTION...........................................................................................4
2.1.Measuring average values andTRMS values.................................................................... 4
2.2.Definition of true root mean square value and Crest factor............................................... 4
3.PREPARATION FOR USE...........................................................................................5
3.1.Initial checks...................................................................................................................... 5
3.2.Instrument power supply................................................................................................... 5
3.3.Calibration......................................................................................................................... 5
3.4.Storage.............................................................................................................................. 5
4.OPERATING INSTRUCTIONS.....................................................................................6
4.1.Description of the instrument............................................................................................. 6
4.1.1.Description of the controls.......................................................................................................... 6
4.2.Description of function keys .............................................................................................. 7
4.2.1.HOLD key .............................................................................................................................. 7
4.2.2.Hz% key...................................................................................................................................... 7
4.2.3.REL key...................................................................................................................................... 7
4.2.4.MODE key .................................................................................................................................. 7
4.2.5.Auto-Power-Off function............................................................................................................. 7
4.3.Description of rotary switch functions................................................................................ 8
4.3.1.DC Voltage measurement.......................................................................................................... 8
4.3.2.AC Voltage measurement .......................................................................................................... 9
4.3.3.Resistance measurement and Continuity test.......................................................................... 10
4.3.4.Diode test.................................................................................................................................. 11
4.3.5.Frequency and Duty Cycle measurements.............................................................................. 12
4.3.6.Capacitance measurement....................................................................................................... 13
4.3.7.Temperature measurement...................................................................................................... 14
5.MAINTENANCE .........................................................................................................15
5.1.General information......................................................................................................... 15
5.2.Replacing the battery ...................................................................................................... 15
5.3.Cleaning the instrument .................................................................................................. 15
5.4.End of life ........................................................................................................................ 15
6.TECHNICAL SPECIFICATIONS ................................................................................16
6.1.Technical characteristics................................................................................................. 16
6.1.1.Reference standards................................................................................................................ 18
6.1.2.General characteristics............................................................................................................. 18
6.2.Environment.................................................................................................................... 18
6.2.1.Environmental conditions for use ............................................................................................. 18
6.3.Accessories..................................................................................................................... 18
6.3.1.Standard accessories............................................................................................................... 18
6.3.2.Optional accessories................................................................................................................ 18
7.ASSISTANCE.............................................................................................................19
7.1.Warranty conditions......................................................................................................... 19
7.2.Assistance....................................................................................................................... 19

HT60
EN - 2
1. PRECAUTIONS AND SAFETY MEASURES
The instrument has been designed in compliance with directive IEC/EN61010-1 relevant to
electronic measuring instruments. For your safety and in order to prevent damaging the
instrument, please carefully follow the procedures described in this manual and read all
notes preceded by symbol with the utmost attention.
Before and after carrying out measurements, carefully observe the following instructions:
Do not carry out any measurement in humid environments
Do not carry out any measurements in case gas, explosive materials or flammables are
present, or in dusty environments
Avoid contact with the circuit being measured if no measurements are being carried out
Avoid contact with exposed metal parts, with unused measuring probes, circuits, etc.
Do not carry out any measurement in case you find anomalies in the instrument such
as deformation, breaks, substance leaks, absence of display on the screen, etc.
Pay special attention when measuring voltages higher than 20V, since a risk of
electrical shock exists
In this manual, and on the instrument, the following symbols are used:
Warning: observe the instructions given in this manual; improper use could
damage the instrument or its components.
High voltage danger: electrical shock hazard.
Double-insulated meter
AC voltage
DC voltage
1.1. PRELIMINARY INSTRUCTIONS
This instrument has been designed for use in environments of pollution degree 2.
It can be used for VOLTAGE measurements on installations in CAT IV 600V
We recommend following the normal safety rules devised to protect the user against
dangerous currents and the instrument against incorrect use.
Only the leads supplied with the instrument guarantee compliance with the safety
standards. They must be in good conditions and replaced with identical models, when
necessary.
Do not test circuits exceeding the specified voltage limits.
Do not perform any test under environmental conditions exceeding the limits indicated
in § 6.1.1 and § 6.2.1.
Check that the battery is correctly inserted.
Before connecting the test leads to the circuit to be tested, make sure that the rotary
switch is correctly set.
Make sure that the LCD display and the rotary switch indicate the same function.

HT60
EN - 3
1.2. DURING USE
Please carefully read the following recommendations and instructions:
CAUTION
Failure to comply with the caution notes and/or instructions may damage
the instrument and/or its components or be a source of danger for the
operator.
Before activating the rotary switch, disconnect the test leads from the circuit being
measured.
When the instrument is connected to the circuit being measured, do not touch any
unused terminal.
Avoid measuring resistance if external voltages are present. Even if the instrument is
protected, excessive voltage could cause it malfunction.
While measuring, if the value or the sign of the quantity being measured remain
unchanged, check if the HOLD function is enabled.
1.3. AFTER USE
When measurement is complete, set the rotary switch to OFF to turn off the instrument.
If the instrument is not to be used for a long time, remove the batteries.
1.4. DEFINITION OF MEASUREMENT (OVERVOLTAGE) CATEGORY
Standard “IEC/EN61010-1: Safety requirements for electrical equipment for measurement,
control and laboratory use, Part 1: General requirements”, defines what measurement
category, commonly called overvoltage category, is. § 6.7.4: Measured circuits, reads:
(OMISSIS)
circuits are divided into the following measurement categories:
Measurement category IV is for measurements performed at the source of the low-
voltage installation.
Examples are electricity meters and measurements on primary overcurrent protection
devices and ripple control units.
Measurement category III is for measurements performed on installations inside
buildings.
Examples are measurements on distribution boards, circuit breakers, wiring, including
cables, bus-bars, junction boxes, switches, socket-outlets in 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 standard requires that the transient withstand capability of
the equipment is made known to the user.

HT60
EN - 4
2. GENERAL DESCRIPTION
HT60 carries out the following measurements in Autorange:
DC voltage
AC TRMS voltage
Resistance and Continuity test
Capacity
Frequency
Duty Cycle
Diode test
Temperature with K-type probe
Each of these functions can be selected using the 7-position rotary switch, including an
OFF position. The instrument is also provided with a HOLD function key to enable
freezing the measured value on the display and to activate the display’s backlight, an Hz%
key to select frequency and duty cycle tests, a REL key to carry out relative measurements
and a MODE key to select resistance measurement, continuity test, diode test and
capacity test. The selected quantity appears on the LCD display with the indication of the
measuring unit and of the enabled functions. The instrument is also equipped with an Auto
Power OFF device which automatically switches it off approx. 30 minutes after the last
time the instrument was used.
2.1. MEASURING AVERAGE VALUES ANDTRMS VALUES
Measuring instruments of alternating quantities are divided into two big families:
AVERAGE-VALUE meters: instruments measuring the value of the sole wave at
fundamental frequency (50 or 60 Hz).
TRMS (True Root Mean Square) VALUE meters: instruments measuring the TRMS
value of the quantity being tested.
With a perfectly sinusoidal wave, the two families of instruments provide identical results.
With distorted waves, instead, the readings shall differ. Average-value meters provide the
RMS value of the sole fundamental wave; TRSM meters, instead, provide the RMS value
of the whole wave, including harmonics (within the instruments bandwidth). Therefore, by
measuring the same quantity with instruments from both families, the values obtained are
identical only if the wave is perfectly sinusoidal. In case it is distorted, TRMS meters shall
provide higher values than the values read by average-value meters.
2.2. DEFINITION OF TRUE ROOT MEAN SQUARE VALUE AND CREST FACTOR
The root mean square value of current is defined as follows: “In a time equal to a period,
an alternating current with a root mean square value of 1A intensity, circulating on a
resistor, dissipates the same energy that, during the same time, would be dissipated by a
direct current with an intensity of 1A". This definition results in the numeric expression:
G= 
Tt
t
dttg
T
0
0
)(
12The root mean square value is indicated with the acronym RMS.
The Crest Factor is defined as the relationship between the Peak Value of a signal and its
RMS value: CF (G)= RMS
p
G
GThis value changes with the signal waveform, for a purely
sinusoidal wave it is 2=1.41. In case of distortion, the Crest Factor takes higher values
as wave distortion increases.

HT60
EN - 5
3. PREPARATION FOR USE
3.1. INITIAL CHECKS
Before shipping, the instrument has been checked from an electric as well as mechanical
point of view. All possible precautions have been taken so that the instrument is delivered
undamaged.
However, we recommend generally checking the instrument in order to detect possible
damage suffered during transport. In case anomalies are found, immediately contact the
forwarding agent.
We also recommend checking that the packaging contains all components indicated in §
6.3.1. In case of discrepancy, please contact the Dealer.
In case the instrument should be returned, please follow the instructions given in § 7.
3.2. INSTRUMENT POWER SUPPLY
The instrument is supplied with 1x9V alkaline battery type IEC 1604 NEDA 6F22, included
in the package. When the battery is flat, the symbol “” appears on the display. To
replace/insert the battery, see § 5.2.
3.3. CALIBRATION
The instrument has the technical specifications described in this manual. Its performance
is guaranteed for 12 months from the date of purchase.
3.4. STORAGE
In order to guarantee precise measurement, after a long storage time under extreme
environmental conditions, wait for the instrument to come back to normal operating
conditions (see § 6.2.1).

HT60
EN - 6
4. OPERATING INSTRUCTIONS
4.1. DESCRIPTION OF THE INSTRUMENT
4.1.1. Description of the controls
CAPTION:
1. LCD display
2. MODE key
3. Hz% key
4. HOLD key
5. REL key
6. Rotary selector switch
7. Input terminal COM
8. Input terminal
VHz%CAPTemp 
Fig. 1: Description of the instrument

HT60
EN - 7
4.2. DESCRIPTION OF FUNCTION KEYS
4.2.1. HOLD key
Pressing the HOLD key freezes the value of the measured quantity on the display. After
pressing this key, the message “HOLD” appears on the display. Press the HOLD key again
to exit the function.
Press and hold the same key for longer than one second to activate and deactivate the
display’s backlight. This function is active in any position of the rotary switch.
4.2.2. Hz% key
Press the Hz% key to select frequency measurement and duty cycle test in positions Hz%
and Hz% of the rotary switch. The frequency range is different in the two positions.
4.2.3. REL key
Press the REL key to activate relative measurement. The instrument zeroes the display
and saves the displayed value as a reference value which subsequent measurements will
be referred to. The symbol “REL” appears on the display. This function is not active for the
following measurements: Hz, Duty Cycle, Continuity Test, Diode test and Temperature.
Press the key again to exit the function.
4.2.4. MODE key
Pressing the MODE key allows selecting a double function on the rotary switch. In
particular, it is active in position CAP /to select diode test, continuity test, capacity
measurement and resistance measurement.
4.2.5. Auto-Power-Off function
In order to preserve internal batteries, the instrument switches off automatically
approximately 30 minutes after it was last used. Turn the rotary switch to OFF before
switching on the instrument again by turning the switch to any other position.

HT60
EN - 8
4.3. DESCRIPTION OF ROTARY SWITCH FUNCTIONS
4.3.1. DC Voltage measurement
CAUTION
The maximum input DC voltage is 600V. Do not measure voltages
exceeding the limits given in this manual. Exceeding voltage limits could
result in electrical shocks to the user and damage to the instrument.
Fig. 2: Use of the instrument for DC voltage measurement
1. Select position V. The symbol “DC” is shown on the display.
2. Insert the red cable into input terminal VHz%CAPTemp and the black cable
into input terminal COM
3. Position the red lead and the black lead respectively in the spots with positive and
negative potential of the circuit to be measured (see Fig. 2). The display shows the
value of voltage.
4. The message “O.L.” indicates that the value of DC voltage exceeds the maximum
measurable value.
5. When symbol “-” appears on the instrument’s display, it means that voltage has the
opposite direction with respect to the connection in Fig. 2.
6. To use the HOLD function and Relative measurement, see § 4.2

HT60
EN - 9
4.3.2. AC Voltage measurement
CAUTION
The maximum input AC voltage is 600V. Do not measure voltages
exceeding the limits given in this manual. Exceeding voltage limits could
result in electrical shocks to the user and damage to the instrument.
Fig. 3: Use of the instrument for AC voltage measurement
1. Select position VHz%. The symbol “AC” is shown on the display.
2. Insert the red cable into input terminal VHz%CAPTemp and the black cable
into input terminal COM.
3. Position the test leads in the desired spots of the circuit to be measured (see Fig. 3).
The display shows the value of voltage.
4. The message “O.L.” indicates that the value of AC voltage exceeds the maximum
measurable value.
5. Press the Hz% key until symbols “Hz” or “%” are shown in order to activate the display
of frequency and duty cycle associated to the value of AC voltage.
6. To use the HOLD function and Relative measurement, see § 4.2

HT60
EN - 10
4.3.3. Resistance measurement and Continuity test
CAUTION
Before attempting any resistance measurement, cut off power supply from
the circuit to be measured and make sure that all capacitors are discharged,
if present.
Fig. 4: Use of the instrument for resistance measurement and continuity test
1. Select position CAP
2. Insert the red cable into input terminal VHz%CAPTemp and the black cable
into input terminal COM.
3. Position the test leads in the desired spots of the circuit to be measured (see Fig. 4).
The display shows the value of resistance.
4. The message “O.L.” indicates that the value of resistance exceeds the maximum
measurable value.
5. Press the MODE key until symbol “” is shown in order to activate continuity test and
connect the instrument as for Resistance measurement. The continuity buzzer
activates for R<30.
6. To use the HOLD function, see § 4.2.

HT60
EN - 11
4.3.4. Diode test
CAUTION
Before attempting any resistance measurement, cut off power supply from
the circuit to be measured and make sure that all capacitors are discharged,
if present.
Fig. 5: Use of the instrument for diode test
1. Select position CAP.
2. Press the MODE key until the symbol “”is displayed.
3. Insert the red cable into input terminal VHz%CAPTemp and the black cable
into input terminal COM.
4. Position the leads at the ends of the diode to be tested, respecting the indicated
polarity (see Fig. 5). The value of directly polarized threshold voltage is shown on the
display.
5. If threshold value is equal to 0mV, the P-N junction of the diode is short-circuited.
6. If the display shows the message “O.L.”, the terminals of the diode are reversed with
respect to the indication given in Fig. 5 or the P-N junction of the diode is damaged.

HT60
EN - 12
4.3.5. Frequency and Duty Cycle measurements
CAUTION
The maximum input AC voltage is 250V. Do not measure voltages
exceeding the limits given in this manual. Exceeding voltage limits could
result in electrical shocks to the user and damage to the instrument.
Fig. 6: Use of the instrument for frequency measurement and duty cycle test
1. Select position Hz%. The symbol “Hz” is shown on the display.
2. Insert the red cable into input terminal VHz%CAPTemp and the black cable
into input terminal COM.
3. Position the test leads in the desired spots of the circuit to be measured (see Fig. 6).
The display shows the value of frequency.
4. The message “O.L.” indicates that the value of frequency exceeds the maximum
measurable value.
5. Press the Hz%key until symbol “%” is shown in order to activate Duty Cycle
measurement and connect the instrument as for Frequency measurement. The result is
shown on the display.
6. To use the HOLD function, see § 4.2.

HT60
EN - 13
4.3.6. Capacitance measurement
CAUTION
Before carrying out capacitance measurements on circuits or capacitors, cut
off power supply from the circuit being tested and let all capacitance in it be
discharged. When connecting the multimeter and the capacitance to be
measured, respect the correct polarity (when required).
Fig. 7: Use of the instrument for Capacitance measurement
1. Select position CAP
2. Press the MODE key until the symbol “nF” is displayed.
3. Insert the red cable into input terminal VHz%CAPTemp and the black cable
into input terminal COM.
4. Press the REL button before carrying out measurements.
5. Position the leads at the ends of the capacitor to be tested, respecting, if necessary,
the positive (red cable) and negative (black cable) polarity (see Fig. 7). The display
shows the value of capacitance.
6. The message “O.L.” indicates that the value of capacitance exceeds the maximum
measurable value.
7. To use the HOLD function and Relative measurement, see § 4.2

HT60
EN - 14
4.3.7. Temperature measurement
CAUTION
Before attempting any temperature measurement, cut off power supply from
the circuit to be measured and make sure that all capacitors are discharged,
if present.
Fig. 8: Use of the instrument for Temperature measurement
1. Select position °C or °F on the instrument.
2. Insert the provided adapter into input terminals VHz%CAPTemp (polarity +)
and COM (polarity -) (see Fig. 8).
3. Connect the provided K-type wire probe or the optional K-type thermocouple (see §
6.3.2) to the instrument by means of the adapter, respecting the positive and negative
polarity on it. The display shows the value of temperature.
4. The message “O.L.” indicates that the value of temperature exceeds the maximum
measurable value.
5. To use the HOLD function, see § . 4.2

HT60
EN - 15
5. MAINTENANCE
5.1. GENERAL INFORMATION
The instrument you purchased is a precision instrument. While using and storing the
instrument, carefully observe the recommendations listed in this manual in order to
prevent possible damage or danger during use.
Do not use the instrument in environments with high humidity levels or high
temperatures. Do not expose to direct sunlight.
Always switch off the instrument after use. In case the instrument is not to be used for a
long time, remove the battery to avoid liquid leaks that could damage the instrument's
internal circuits.
5.2. REPLACING THE BATTERY
When the LCD display shows the lat battery symbol “” (see § 6.1.2), it is necessary
to replace the battery.
CAUTION
Only expert and trained technicians should perform this operation. Before
carrying out this operation, make sure you have disconnected all cables
from the input terminals.
1. Position the rotary switch to OFF and remove the cables from the input terminals.
2. Turn the fastening screw of the battery compartment cover from position “” to position
“” and remove it.
3. Remove the battery and insert a new battery of the same type (see § 6.1.2), respecting
the indicated polarity.
4. Restore the battery compartment cover into place and turn the fastening screw from
position “” to position “ ”.
5. Do not scatter old batteries into the environment. Use the relevant containers for
disposal.
5.3. CLEANING THE INSTRUMENT
Use a soft and dry cloth to clean the instrument. Never use wet cloths, solvents, water, etc.
5.4. END OF LIFE
WARNING: the symbol on the instrument indicates that the appliance, the
battery and its accessories must be collected separately and correctly disposed
of.

HT60
EN - 16
6. TECHNICAL SPECIFICATIONS
6.1. TECHNICAL CHARACTERISTICS
Accuracy calculated as ±[%reading + (num. dgt*resol)] referred to 18°C28°C,<75%HR.
DC voltage (Autorange)
Range Resolution Accuracy Input impedance
Protection against
overcharge
4.000V 0.001V (1.2%rdg + 2dgt) 7.8M600VDC/ACrms
40.00V 0.01V
400.0V 0.1V
600V 1V
(1.5%rdg + 2dgt)
AC TRMS voltage (Autorange)
Range Resolution Accuracy (*)
(50 400Hz) Input impedance Protection against
overcharge
4.000V 0.001V (1.2%rdg + 8dgt)
7.8M600VDC/ACrms
40.00V 0.01V (1.5%rdg +3dgt)
400.0V 0.1V
600V 1V
(2.0%rdg + 4dgt)
(*) Accuracy specified from 5% to 100% of the measuring range, Frequency range: 50Hz 400Hz
Resistance (Autorange)
Range Resolution Accuracy Protection against overcharge
400.00.1(1.2%rdg + 4dgt)
250VDC/ACrms
4.000k0.001k(1.0%rdg + 2dgt)
40.00k0.01k(1.2%rdg + 2dgt)
400.0k0.1k
4.000M0.001M
40.00M0.01M(2.0%rdg + 3dgt)
Diode test
Function Resolution Accuracy Max voltage with
open circuit Protection against overcharge
1mV (10%rdg + 5dgt) approx. 1.5VDC 250VDC/ACrms
Continuity test with buzzer
Function Buzzer Test current
Protection against
overcharge
<30<0.3mA 250VDC/ACrms
Frequency (Autorange)
Range Resolution Accuracy Higher Protection against
overcharge
5.000Hz 0.001Hz (1.5%rdg + 5dgt)
>8Vrms 250VDC/ACrms
50.00Hz 0.01Hz
500.0Hz 0.1Hz
(1.2%rdg + 3dgt)
5.000kHz 1Hz
50.00kHz 10Hz
500.0kHz 100Hz
5.000MHz 1kHz (1.5%rdg + 4dgt)
10.00MHz 10kHz
Note: in AC Voltage range, frequency range is: 10Hz 10kHz ; Sensitivity: > 15Vrms

HT60
EN - 17
Duty cycle (Autorange)
Range Resolution Accuracy Sensitivity Protection against
overcharge
0.5 - 99% 0.1% (1.2%rdg + 2dgt) >8Vrms 250VDC/ACrms
100s< pulse duration <100ms; Frequency range: 5Hz 150kHz
Note: in AC Voltage range, frequency range is: 10Hz 10kHz ; Sensitivity: > 15Vrms
Capacitance (Autorange)
Range Resolution Accuracy Protection against overcharge
40.00nF 0.01nF (5.0%rdg + 7dgt)
250VDC/ACrms
400.0nF 0.1nF (3.0%rdg + 5dgt)
4.000F 0.001F
40.00F 0.01F
100.0F 0.1F (5.0%rdg + 5dgt)
Temperature with K probe (Autorange)
Range Resolution Accuracy (*)
Protection against
overcharge
-20°C ÷ 400°C 0.1°C (3.0%reading + 5°C) 250VDC/ACrms
400°C ÷ 760°C 1°C
-4°F ÷ 752°F 0.1°F (3.0%reading + 9°F)
752F ÷ 1400°F 1°F
(*) Accuracy of the only instrument without probe