HT instruments HT4016 User Manual

ENGLISH

User’s manual

©Copyright HT ITALIA 2007 Release EN 1.06 - 26/10/2007

HT4014-HT4016

CONTENTS:

1. SAFETY PRECAUTIONS AND PROCEDURES.............................................................2

1.1. Preliminary ............................................................................................................3

1.2. During Use ............................................................................................................3

1.3. After Use ...............................................................................................................3

1.4. Definition of measuring (overvoltage) category.....................................................4

2. GENERAL DESCRIPTION..............................................................................................5

3. PREPARATION FOR USE..............................................................................................6

3.1. Initial......................................................................................................................6

3.2. Supply Voltage ......................................................................................................6

3.3. Calibration .............................................................................................................6

3.4. Storage..................................................................................................................6

4. OPERATING INSTRUCTIONS........................................................................................7

4.1. Instrument Description...........................................................................................7

4.1.1. Commands description.................................................................................................. 7

4.1.2. Alignment marks............................................................................................................ 7

4.1.3. Use of rubber test leads holster .................................................................................... 8

4.1.4. AUTO POWER OFF function........................................................................................ 8

4.2. Function key description........................................................................................9

4.2.1. R-H / key: range selection / backlight function (HT4016 only) ................................. 9

4.2.2. D-H key: HOLD function................................................................................................9

4.2.3. ZERO key: zeroing display function (HT4016 only) ...................................................... 9

4.2.4.

key: enable/disable backlight (HT4014 only)........................................................... 9

4.2.5. MAX/MIN key: store Maximum and Minimum values.................................................... 9

4.3. Description of Rotary Switch Function.................................................................10

4.3.1. AC Voltage measurement...........................................................................................10

4.3.2. DC Voltage measurement........................................................................................... 11

4.3.3. AC Current measurement ........................................................................................... 12

4.3.4. DC Current measurement (HT4016 only) ................................................................... 13

4.3.5. Resistance measurement............................................................................................ 14

4.3.6. Continuity Test ............................................................................................................ 15

4.3.7. Diode test (HT4014 only) ............................................................................................ 16

4.3.8. Frequency measurement (HT4014 only)..................................................................... 17

5. MAINTENANCE ............................................................................................................18

5.1. General information.............................................................................................18

5.2. Battery replacement ............................................................................................18

5.3. Cleaning..............................................................................................................18

5.4. End of life ............................................................................................................18

6. TECHNICAL SPECIFICATIONS ...................................................................................19

6.1. Characteristics.....................................................................................................19

6.1.1. Safety..........................................................................................................................20

6.1.2. General data................................................................................................................ 20

6.2. Environmental conditions ....................................................................................20

6.2.1. Climatic conditions ...................................................................................................... 20

6.2.2. EMC ............................................................................................................................ 21

6.3. Accessories.........................................................................................................21

6.3.1. Standard accessories..................................................................................................21

7. SERVICE....................................................................................................................... 22

7.1. Warranty conditions.............................................................................................22

7.2. Service ................................................................................................................22

EN - 1

HT4014-HT4016

1. SAFETY PRECAUTIONS AND PROCEDURES

This instrument is conforms to safety standard EN 61010, 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.

If instrument is used in way don’t conform to prescriptions of this user’s
manual, all considered safety protection maybe damaged.

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 as it might cause human body electricity conduction.

• Take care not to allow your hand to pass over the Safety Guard (see Fig.1, pos.2) on

current measurements and voltage measurements using the holster.

The followings symbols are used:

Caution: Refer to the instruction manual. Incorrect use may damage the
apparatus or its components.

Danger high voltage: risk of electric shock.

Meter double insulated.
AC Voltage or Current.

DC Voltage or Current.

WARNING

EN - 2

HT4014-HT4016

1.1. PRELIMINARY

• This apparatus has been designed for use in an environment of pollution degree 2.

• It can be used for CURRENT, VOLTAGE and FREQUENCY measurements on

installations of surge voltage category III up to 600 V, voltage between Phase and
Earth (fixed installations) and for current measures up to 400A. Please refer to chapter

1.4 for information regard on overvoltage categories.

• This meter is not available for non-sine wave AC signal.

• 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.

• Do not perform any test with environmental condition exceeding the limits indicated in
paragraphs 6.2.1.

• Check if the batteries are 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 LCD 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:

No compliance to the warnings and/or the instructions for use may damage
the meter and/or its components or injure the operator.

WARNING

• When changing range, first remove the tested conductor or electrical circuit from the
clamp jaw 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, first remove the test leads of common and voltage­resistance.

• When measuring current, any strong current nears or closes to the clamp jaw will affect
the accuracy.

• When measuring current, always put the tested conductor in the center of the clamp
jaw so as to obtain a more accurate reading as referred into paragraph 4.1.2.

• During measuring, if the value of reading or indication of sign remain unchanged, check
if the HOLD function is active.

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

HT4014-HT4016

1.4. DEFINITION OF MEASURING (OVERVOLTAGE) CATEGORY

The norm EN 61010: Safety requirements for electrical equipment for measurement,
control and laboratory use, Part 1: General requirements, defines what a measuring
category, usually called overvoltage category, is.

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 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 withstand capability of the
equipment is made known to the user.

EN - 4

HT4014-HT4016

2. GENERAL DESCRIPTION

This manual is referred to two models: HT4014 and HT4016; the difference between the
models is fundamentally the capacity of the first to measure the frequency and of the latter
to measure DC current and to perform relative measurements using the ZERO function.
Where not expressly indicated the characteristics are common for both models.

The apparatus can perform the following measurements:

• AC current.

• AC voltage.

• DC voltage.

• DC current (HT4016 only).

• Resistance.

• Frequency (HT4014 only).

• Continuity Test.

• Diode test (HT4014 only).

Each of these parameters can be selected by means of an 7-position rotary switch,
including an OFF position. There are also the following keys: “D-H”, “R-H / , “MAX/MIN”,
“ ”, “Ω/ ” and “ZERO”. For their use please see paragraph 4.2. The selected quantity
appears on a high-contrast display with indication of measurement units and functions.

Instrument have the possibility to show measurement values with an analogical bargraph.

EN - 5

HT4014-HT4016

3. PREPARATION FOR USE

3.1. INITIAL

This instrument has been checked mechanically and electrically before shipment. All
precautions have been taken to assure that the instrument reaches you in perfect
condition.

However, it is advisable to carry out a rapid check in order to detect any possible damage,
which might have occurred in transit.

Check the packaging contained according to packaging list reported in paragraph 6.3.1. In
case of discrepancies contact the dealer.

In the event of re-shipment of the equipment please follow the instructions reported in
paragraph 7.

3.2. SUPPLY VOLTAGE

The instrument is battery supplied; it use two batteries model 1.5V LR03 AAA UM-4
included in packaging. The batteries autonomy is about 50 hours.

The symbol " " appears when the batteries are nearly discharged. In case replace
them following the instructions in paragraph 5.2.

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 6.2.1.).

EN - 6