ENGLISH
User’s manual
© Copyright HT ITALIA 2011 Release EN 1.03 - 17/11/2011
HT-14N
CONTENTS:
1. Safety precautions and procedures .............................................................................. 2
1.1. Preliminary ............................................................................................................ 2
1.2. During Use ............................................................................................................ 3
1.3. After Use ............................................................................................................... 3
2. General Description ...................................................................................................... 4
3. Preparation for Use ....................................................................................................... 4
3.1. Initial ...................................................................................................................... 4
3.2. Supply Voltage ...................................................................................................... 4
3.3. Calibration ............................................................................................................. 4
3.4. Storage .................................................................................................................. 4
4. Operating Instructions ................................................................................................... 5
4.1. Instrument Description ........................................................................................... 5
4.2. Measurement Description ...................................................................................... 5
4.2.1. DC Voltage measurement .............................................................................. 5
4.2.2. AC Voltage measurement .............................................................................. 6
4.2.3. DC Current measurement .............................................................................. 6
4.2.4. Resistance measurement ............................................................................... 6
4.2.5. Decibel measurement .................................................................................... 7
4.2.6. Battery check for 1.5 V and 9.0V .................................................................... 7
4.3. Preventive Maintenance ........................................................................................ 8
4.3.1. General information ........................................................................................ 8
4.3.2. Battery replacement ....................................................................................... 8
4.3.3. Fuse replacement ........................................................................................... 8
4.3.4. Cleaning ......................................................................................................... 8
4.3.5. End of life ....................................................................................................... 8
5. Technical specifications ................................................................................................ 9
5.1. Characteristics ....................................................................................................... 9
5.1.1. DC Voltage ..................................................................................................... 9
5.1.2. AC Voltage ..................................................................................................... 9
5.1.3. AC Current ..................................................................................................... 9
5.1.4. Resistance ...................................................................................................... 9
5.1.5. Battery Test .................................................................................................... 9
5.1.6. Safety ........................................................................................................... 10
5.1.7. General data ................................................................................................. 10
5.2. Environmental conditions .................................................................................... 10
5.2.1. Climatic conditions ....................................................................................... 10
5.3. Accessories ......................................................................................................... 10
5.3.1. Standard accessories ................................................................................... 10
6. Service ........................................................................................................................ 11
6.1. Warranty conditions ............................................................................................. 11
6.2. Service ................................................................................................................ 11
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1. SAFETY PRECAUTIONS AND PROCEDURES
This apparatus conforms to safety standard EN 61010-1, relating to electronic measuring
instruments.
For your own safety and that of the apparatus, you must follow the procedures described
in this instruction manual and especially read all the notes preceded by the symbol
carefully.
Take extreme care for the following conditions when measuring:
• Do not measure voltage, current under humid or wet environment.
• Do not operate the meter under the environment with explosive gas (material),
combustible gas (material), steam or filled with dust.
• Keep you insulated from the object waiting for measuring.
• Do not contact any exposed metal (conductive) parts such as end of test lead, socket,
fixing object, circuit, etc.
• If any unusual condition of testing end (metal part) and attachment of the meter such as
breakage, deformation, fracture, foreign substance, no display, etc., do not conduct any
measuring.
• Measuring voltage over 20V.
• When measuring AC power supply, it might cause human body electricity conduction.
The followings symbols are used:
Caution: Refer to the instruction manual. Incorrect use may damage the
apparatus or its components.
1.1. PRELIMINARY
Danger high voltage: risk of electric shock.
Meter double insulated.
DC voltage or current.
AC voltage or current.
• This apparatus has been designed for use in an environment of pollution degree 2.
• It can be used for VOLTAGE measurements on installations of surge voltage category
II (equipment supplied by fixed systems)up to 300 volts.
• You must comply with the usual safety regulations aimed at:
♦ Protecting you against the dangerous electric current.
♦ Protecting the instrument against an incorrect operation.
• Only the leads supplied with the instrument guarantee compliance with the safety
standard. They must be in a good condition and they must be replaced, if necessary
with an identical model.
• Do not test or connect to any circuit with voltage or current exceeding the specified
overload protection.
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• Check if the battery is installed correctly.
• Prior to connecting the test probes to the installation, check that the function selector is
positioned on the required measurement.
• Check if the analog display and the range indicator show the same as the function
desired.
1.2. DURING USE
Read the recommendation which follow and the instruction in this manual:
WARNING
Non compliance with the warnings and/or the instructions for use may
damage the apparatus and/or its components or injure the operator.
• When measuring voltage ensure that the instrument is not switched to a current or
resistance range. Always ensure that the correct terminals are used for the type of
measurements to be made.
• When changing range, first disconnect the test leads from the circuit under test in order
to avoid any accident.
• When the apparatus is connected to the measuring circuits, never touch an unused
terminal.
• When measuring resistor, please do not add any voltage. Though there is a protection
circuit, excessive voltage will still cause malfunction.
• When measuring current ensure that the circuit is powered off before opening it in
order to connect test leads.
• Extreme care should be taken when using the instrument in conjunction with a current
transformer connected to the terminals. High voltage may be produced at the terminals
if an open circuit occurs.
• This meter is not available for AC current measurements or non-sine wave AC voltage.
• To prevent mechanical damage of analog pointer coil do not submit the instrument to
vibration or shock.
1.3. AFTER USE
• Once the measurements are completed, turn the rotary switch to OFF.
• If the instruments is not be used for a long period, remove the battery.
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2. GENERAL DESCRIPTION
Dear customer, we thank you for your patronage. The multimeter you have just purchased
will grant you accurate and reliable measurements provided that it is used according to the
present manual’s instructions.
The apparatus can perform the following measurement:
• DC values of the voltage (VDC).
• AC values of the voltage (VAC) without DC components.
• DC values of the voltage (VDC) without AC components.
• DC values of the current (IDC) without AC components.
• Resistance values.
• Battery test.
• Decibel values.
Each of these parameters can be selected by means of an 16-position rotary switch,
including an OFF position.
3. PREPARATION FOR USE
3.1. INITIAL
All the equipment has been checked mechanically and electrically prior to shipment.
Every care has been taken to ensure that the instrument reaches you undamaged.
However, it is wise to carry out a rapid check in order to detect any possible damage which
might have been caused during transport. Should this be the case, immediately enter the
usual claims with courier.
Check the packaging contained according to packaging list reported in paragraph 5.3.1. In
case of discrepancies contact the dealer.
In the event of re-shipment of the equipment please follow the instructions reported in
paragraph 6.
3.2. SUPPLY VOLTAGE
The instrument is battery supplied; it use a single battery model UM3 single 1,5V AA size
IEC LR6 included in packaging. The battery is involved in Ω measurement only and grant
autonomy is about 10 hours of continuos work.
3.3. CALIBRATION
The instrument fulfils the technical characteristics listed in this manual. The performance of
the specifications are guaranteed for one year.
3.4. STORAGE
In order to guarantee the accuracy of the measurements, after a period of storage in
extreme environment condition, wait for the time necessary so that the apparatus returns
to normal measuring conditions (see environments specifications paragraph 5.2.1).
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4. OPERATING INSTRUCTIONS
4.1. INSTRUMENT DESCRIPTION
LEGEND:
1. Case with protective holster.
2. Analog display.
3. Resistance zero adjustment knob.
4. Resistance range.
5. AC voltage range.
6. DC Current range.
7. Pin cover.
8. Attachable test leads with probes.
9. DC voltage range.
10. Rotary switch.
11. Battery test.
Fig. 1: Instrument description.
4.2. MEASUREMENT DESCRIPTION
4.2.1. DC Voltage measurement
WARNING
Maximum input for DC voltage is 500V . Do not attempt to take any
voltage measurement that exceeds the limits. Exceeding the limits could
cause electrical shock and damage the multimeter.
1. Select a proper range for DC voltage (2.5, 25, 250 or 500 DC V).
2. If the voltage range is not known beforehand, set the range switch to the highest range
and work down.
3. Insert the two long ends of test leads to the desired circuit, then reading will be
displayed in the corresponding black scale.
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4.2.2. AC Voltag e measurement
WARNING
Maximum input for AC voltage is 500V . Do not attempt to take any
voltage measurement that exceeds the limits. Exceeding the limits could
cause electrical shock and damage the multimeter.
1. Select a proper range for AC voltage (25, 250 or 500 DC V).
2. If the voltage range is not known beforehand, set the range switch to the highest range
and work down.
3. Insert the two long ends of test leads to the desired circuit, then reading will be
displayed in the corresponding red scale.
4.2.3. DC Curren t measurement
WARNING
Make sure that circuit under test is powered off before open it to insert test
leads. Do not attempt to take any current measurements in circuits power
with more than 240 V.
1. Power off the circuit under test.
2. Select a proper range for DC current (1, 10, 100 mA).
3. If the current range is not known beforehand, set the range switch to the highest range
and work down.
4. Insert the two test leads in series with the load in which the current is to be measured.
5. Power on the circuit under test.
6. The reading will be displayed in the corresponding black scale.
7. If the analog pointer doesn’t move during current measuring control the fuse inside the
multimeter and replace it if necessary (ref. Paragraph 4.3.3).
4.2.4. Resistance measurement
WARNING
Before taking any in circuit resistance measurement, remove power from
the circuit being tested and discharge all the capacitors.
1. Select a proper range for Resistance (10, 100, 1000 Ω).
2. Short the two probes together and adjust the “0 Ω ADJ” knob to set the pointer at zero
position on the right side of the analog display.
3. If the pointer can’t reach zero position replace the battery with a new one and repeat
step 2 again.
4. Insert the two long ends of test leads to the desired circuit, then reading will be
displayed in the green scale.
5. As measuring resistance, any voltage existing in circuit is not allowed. If a capacitor is
installed, it must be discharged before test.
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4.2.5. Decibel measurement
WARNING
Maximum input for AC/DC voltage is 500V.
Do not attempt to take any voltage measurement that exceeds the limits.
Exceeding the limits could cause electrical shock and damage the
multimeter. Disconnect test leads from the circuit under test prior to select a
different range.
1. Select a proper range for AC voltage (25, 250 or 500 DC V) according with the
following table:
dB Range (dB) 0 - 30 20 -50 26 –56
AC Range (V) 25 250 500
Correction Factor (db) 0 20 26
2. If the dB range is not known beforehand, set the range switch to the highest range and
work down.
3. Insert the two long ends of test leads to the desired circuit.
4. The reading will be displayed in the corresponding red scale. The measured dB will get
from the following formula:
dB = dB (read on dB scale) + Correction Factor
Note: for absolute dB measurements, circuit impedance must be 600 Ω, 0db = 1mW
dissipated in a 600Ω load.
For the signal with DC component, connect a capacitor with capacity > 0.1F between test
probes and circuit under test.
4.2.6. Battery check for 1.5 V and 9.0V
WARNING
Maximum input for DC voltage is 10V. Do not attempt to take any voltage
measurement that exceeds the limits. Exceeding the limits could cause
electrical shock and damage the multimeter.
1. Select a proper range for Battery check (1.5, 9.0 V).
2. Insert the two long ends of test leads to the battery under test, then reading will be
displayed in the “BATT” scale. (“RED” color for bad, “GREEN” color for good).
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4.3. PREVENTIVE MAINTENANCE
4.3.1. General information
1. This multimeter is a precision instrument. Whether in use or in storage, please do not
exceed the specification requirements to avoid any possible damage or danger during
use.
2. Do not place this meter in high temperature or humidity or expose to direct sunlight.
3. Be sure to turn the meter off after use. For long time storage, remove the battery to
avoid leakage of battery liquid that would damage the interior parts.
4. To prevent mechanic al damage of analog pointer coil do not submit the instrument to
vibration or shock.
4.3.2. Battery replacement
When the pointer doesn’t reach the 0Ω even adjusting the “0Ω ADJ” knob replace battery.
WARNING
Before attempting battery removal disconnect test leads from any energised
circuits to avoid electrical shock.
1. Set range switch to OFF position.
2. Disconnect the test leads from the circuit under test.
3. Remove the protective case, the screws fr om the battery cover, and detach the battery
covers from the bottom cover.
4. Remove the battery and replace it with a new one of the same type (UM3 single 1.5Volt
AA size battery, IEC LR6) observing the proper polarity from the diagram inside the
battery compartment.
5. Replace the battery cover, screws and protective case.
4.3.3. Fuse replacement
WARNING
Before attempting fuse removal disconnect test leads from any energised
circuits to avoid electrical shock.
1. Set range switch to OFF position.
2. Disconnect the test leads from the circuit under test.
3. Remove the protective case, the screws fr om the battery cover, and detach the battery
covers from the bottom cover.
4. Remove the battery, the screws inside the battery compartment and the screw placed
in the case bottom.
5. Replace the fuse with a new one only with identical type and rating (500mA/250V).
6. Replace case, battery cover, screws and protective case.
4.3.4. Cleaning
For cleaning the instrument use a soft dry cloth. Never use a wet cloth, solvents or water,
etc.
4.3.5. 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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5. TECHNICAL SPECIFICATIONS
5.1. CHARACTERISTICS
Accuracy is indicated as ± [% of reading].
It is referred to the following reference conditions: 23°C ± 5°C with RH <75%.
5.1.1. DC Voltage
Range Sensitivity Accuracy
2.5V
25V
250V
500V
Meter resistance: 2kΩ/V
5.1.2. AC Voltage
Range Sensitivity Accuracy
25V
250V
500V
Meter resistance: 2kΩ/V
2kΩ/V
2kΩ/V
2kΩ/V
2kΩ/V
2kΩ/V
2kΩ/V
2kΩ/V
(5% of full scale)
(5% of full scale)
(5% of full scale)
(5% of full scale)
(5% of full scale)
(5% of full scale)
(5% of full scale)
5.1.3. AC Current
5.1.4. Resistance
5.1.5. Battery Test
Range Test current Accuracy
1.5V 100mA
9.0V 10mA
Range Accuracy
1mA
10mA
100mA
Range Accuracy
R x 10Ω
R x 100Ω
R x 1KΩ
(5% of full scale)
(5% of full scale)
(5% of full scale)
(5% of full scale)
(5% of full scale)
(5% of full scale)
(10% of full scale)
(10% of full scale)
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5.1.6. Safety
Comply with: EN 61010-1.
Insulation: Class 2, double reinforced insulation.
Pollution: Level 2.
For inside use, max height: 2000m.
Over voltage: CAT II 300V.
5.1.7. General data
Mechanical characteristics
Size: 80 (W) x 145(H) x 45(D)mm.
Weight (including battery, holster and test leads): about 250g.
Supply
Battery type: UM3 single 1.5Volt AA size battery, IEC
LR6.
Battery life (only for Ω measurement): About 10 hours of continuos work.
Fuse: 5 x 20mm 500mA/250V Fast Acting.
Display
Display Type: Analog display.
5.2. ENVIRONMENTAL CONDITIONS
5.2.1. Climatic conditions
Reference temperature: 23 ± 1°C
Operating and storage temperature: 5 ÷ 40°C
Operating and storage humidity: <75% RH
This product conforms to the prescriptions of the European directive on low voltage
2006/95/EEC (LVD) and to EMC directive 2004/108/EEC
5.3. ACCESSORIES
5.3.1. Standard accessories
The accessories contained inside the packaging are the following:
• Instrument.
• Test leads.
• Instruction manual.
• Holster.
• Battery.
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6. SERVICE
6.1. 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, with the manufacturer reserving 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 outward transport is payable by the customer. The delivery must be agreed in advance
with consignee.
For delivery indicate by means a note enclosed with the equipment, as clear as possible,
the reasons for returning it use only the original packing.
Any damaging caused by shipment using NOT original packaging will be charged in any
case to the consignor.
The manufacturer will not be responsible for any damage against persons or things.
The warranty doesn’t apply to the following cases:
• Accessories and battery aren’t include in warranty.
• Repairs following unsuitable use of the equipment or by combining the latter with
incompatible equipment.
• Repairs resulting from a not correct shipping.
• Repairs resulting from servicing carried out by a person not approved by the company.
• Modifications to the equipment without explicit authorisation from our technical
departments.
• 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 our
agreement.
Our product are patented. The logotypes are registered. We reserve the right to
modify characteristics and prices as part of technological developments which
might require them.
6.2. SERVICE
If the equipment shouldn’t work correctly, before contacting the SERVICE, test the battery
condition, the test leads, etc., and change them if necessary.
If the equipment still doesn’t work check if your operating procedure agrees with the latter
described in this manual.
In the event of returning the equipment it must be re-sent to the after-sales service (at
address or to a regional branch), the outward transport is payable by the customer. The
delivery must be agreed in advance with consignee.
For delivery indicate by means a note enclosed with the equipment, as clear as possible,
the reasons for returning it use only the original packing.
Any damage caused by delivery with NO original packaging will be charged in any case to
the consignor.
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