Hioki 3151 Manuel utilisateur
3151
EARTH HiTESTER
INSTRUCTION MANUAL
Contents
Introduction i
Inspection i
Safety Notes ii
Notes on Use vi
Chapter 1 Outline 1
1.1 Product Outline 1
1.2 Features 2
1.3 Names and Functions of Parts 4
Chapter 2 Specifications 7
2.1 General Specifications 7
2.2 Measurement Range and Tolerances 9
Chapter 3 Technical Information 11
3.1 Earthing Resistance 11
3.2 Measurement Principle 13
Chapter 4 Measurement Procedure 15
4.1 Preparations 16
4.2 Normal Measurement (3-Pole Method) 17
4.3 Simplified Measurement (2-Pole Method) 22
4.4 Using the Earthing Net 28
4.5 Measurement Precautions and Hints 29
Chapter 5 Maintenance and Service 35
5.1 Attaching the Hand Strap 35
5.2 Changing the Batteries 36
5.3 Cleaning the Unit 38
5.4 Service 38
i
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Introduction
――――――――――――――――――――――――
Introduction
Inspection
Thank you for purchasing the HIOKI"3151
EARTH HiTESTER." To obtain maximum
performance from the instrument, please read
this manual first, and keep it handy for future
reference.
When you receive the instrument, inspect it
carefully to ensure that no damage occurred
during shipping. In particular, check the
accessories, panel switches, and connectors. If
damage is evident, or if it fails to operate
according to the specifications, contact your
dealer or Hioki representative.
Accessories
9214 AUXILIARY EARTHING RODS (two)
9215 MEASURING CABLE
(black 5 m, yellow 10 m, red 20 m)
9216 CABLE WINDER (with 9215) (three)
9393 CARRYING CASE
Hand strap
Instruction manual
R6P Manganese batteries (six)
ii
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Safety Notes
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DANGER
This instrument is designed to comply with IEC
61010 Safety Standards, and has been thoroughly
tested for safety prior to shipment. However,
mishandling during use could result in injury or
death, as well as damage to the instrument. Be
certain that you understand the instructions and
precautions in the manual before use. We
disclaim any responsibility for accidents or
injuries not resulting directly from instrument
defects.
Safety Notes
This manual contains information and
warnings essential for safe operation of the
instrument and for maintaining it in safe
operating condition. Before using the
instrument, be sure to carefully read the
following safety notes.
iii
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Safety Notes
――――――――――――――――――――――――
The symbol printed on the
instrument indicates that the user
should refer to a corresponding topic in
the manual (marked with the
symbol) before using the relevant
function.
In the manual, the symbol indicates
particularly important information that
the user should read before using the
instrument.
Indicates a double-insulated device.
Indicates AC (Alternating Current).
DANGER
Indicates that incorrect operation
presents an extreme hazard that could
result in serious injury or death to the
user.
WARNING
Indicates that incorrect operation
presents a significant hazard that could
result in serious injury or death to the
use.
CAUTION
Indicates that incorrect operation
presents a possibility of injury to the
user or damage to the instrument.
NOTE Indicates advisory items related to
performance or correct operation of the
instrument.
Safety Symbols
The following symbols in this manual indicate
the relative importance of cautions and warnings.
iv
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Safety Notes
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Overvoltage categories (CAT)
This instrument complies with CAT II safety
requirements.
To ensure safe operation of measurement
instruments, IEC 60664 establishes safety
standards for various electrical environments,
categorized as CAT I to CAT IV, and called
overvoltage categories. These are defined as
follows.
CAT I : Secondary electrical circuits
connected to an AC electrical outlet
through a transformer or similar
device.
CAT II : Primary electrical circuits in
equipment connected to an AC
electrical outlet by a power cord
(portable tools, household appliances,
etc.)
CAT III : Primary electrical circuits of heavy
equipment (fixed installations)
connected directly to the distribution
panel, and feeders from the
distribution panel to outlets.
CAT IV : The circuit from the service drop to
the service entrance, and to the
power meter and primary overcurrent
protection device (distribution panel).
v
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Safety Notes
――――――――――――――――――――――――
Higher-numbered categories correspond to
electrical environments with greater momentary
energy. So a measurement device designed for
CAT III environments can endure greater
momentary energy than a device designed for
CAT II.
Using a measurement instrument in an
environment designated with a higher-
numbered category than that for which the
instrument is rated could result in a severe
accident, and must be carefully avoided.
vi
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Notes on Use
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DANGER
When measuring earthing resistance, a voltage
of maximum 50 Vrms exists across the
measurement terminals E - C(H). Take proper
precautions against electric shock.
When performing a simplified measurement (2-
pole method) with the instrument connected to
the earth side of a household power supply (AC
outlet), take proper precautions against electric
shock.
Notes on Use
Follow these precautions to ensure safe
operation and to obtain the full benefits of the
various functions.
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