HT instruments HT5 User Manual

ENGLISH

User manual

 Copyright HT ITALIA 2012 Release EN 2.01 - 07/02/2012

HT5

Table of contents:

1. PRECAUTIONS AND SAFETY MEASURES ........................................................................... 2

1.1. Preliminary instructions .................................................................................................................... 2

1.2. During use ........................................................................................................................................ 2

1.3. After use ........................................................................................................................................... 2

1.4. Definition of measurement (overvoltage) category .......................................................................... 3

2. GENERAL DESCRIPTION ....................................................................................................... 4

3. PREPARATION FOR USE ....................................................................................................... 4

3.1. Initial checks ..................................................................................................................................... 4

3.2. Instrument power supply .................................................................................................................. 4

3.3. Calibration ........................................................................................................................................ 4

3.4. Storage ............................................................................................................................................. 4

4. OPERATING INSTRUCTIONS ................................................................................................. 5

4.1. Instrument description ...................................................................................................................... 5

5. INSTRUMENT FUNCTIONS ..................................................................................................... 6

5.1. Phase detection ................................................................................................................................ 6

5.2. Lamp test .......................................................................................................................................... 7

5.3. Continuity / Diode test ...................................................................................................................... 8

6. MAINTENANCE ........................................................................................................................ 9

6.1. General information .......................................................................................................................... 9

6.2. Battery replacement ......................................................................................................................... 9

6.3. Cleaning the instrument ................................................................................................................... 9

6.4. End of life ......................................................................................................................................... 9

7. TECHNICAL SPECIFICATIONS ............................................................................................. 10

7.1. Technical characteristics ................................................................................................................ 10

7.2. General characteristics ................................................................................................................... 10

7.3. Environment ................................................................................................................................... 10

7.3.1. Environmental conditions of use ...................................................................................................... 10

7.4. Accessories .................................................................................................................................... 10

7.4.1. Standard accessories ...................................................................................................................... 10

8. SERVICE ................................................................................................................................ 11

8.1. Warranty conditions ........................................................................................................................ 11

8.2. Service ........................................................................................................................................... 11

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HT5

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 the symbol with the utmost attention.

Before and after carrying out the measurements, carefully observe the following
instructions:

• Do not carry out any voltage or current 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 under test 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; an improper use could
damage the instrument or its components.

High voltage danger: electrical shock hazard.

Double-insulated meter

1.1. PRELIMINARY INSTRUCTIONS

• This clamp has been designed for use in environments of pollution degree 2.

• It can be used for VOLTAGE measurements on installations with measurement

category CAT II 300V. For a definition of measurement categories, see § 1.4.

• We recommend following the normal safety rules devised by the procedures for
carrying out operations on live systems and using the prescribed PPE to protect the
user against dangerous currents and the instrument against incorrect use.

• Do not test circuits exceeding the specified current and voltage limits.

• Check that the battery is correctly inserted.

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.

• When the instrument is connected to the circuit under test, do not touch any unused

terminal.

• Don’t execute continuity test when external voltage is present.

1.3. AFTER USE

• If the instrument is not to be used for a long time, remove the batteries.

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HT5

1.4. DEFINITION OF MEASUREMENT (OVERVOLTAGE) CATEGORY

Standard CEI 61010: Safety requirements for electrical equipment for measurement,
control and laboratory use, Part 1: General requirements” defines measurement category,
commonly called overvoltage category. In § 6.7.4: Measured circuits, circuits are divided
into the following measurement categories:

(OMISSIS)

• 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 withstanding capability of the equipment is
made known to the user.

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