HT instruments HT14N User Manual

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

EN - 1

HT-14N

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.

EN - 2

HT-14N

• 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.

EN - 3