Hioki 3257-50 Manuale utente

3257-51

DIGITAL HiTESTER

3257-50

Instruction Manual

June 2012 Revised edition 9 3257C981-09 12-06H

Introduction ............................................................. 1

Inspection ............................................................... 1

Safety Notes ........................................................... 2

Usage Notes........................................................... 6

Chapter 1 Overview 10

1.1 Product Overview ................................. 10

1.2 Features ................................................ 10

1.3 Parts Names and Functions .................11

Chapter 2 Measurement Procedures 19

2.1 Pre-Operation Inspection...................... 20

2.2 Voltage Measurement........................... 22

2.3 Frequency Measurement...................... 24

2.4 Current Measurement........................... 25

2.5 Resistance Measurement..................... 28

2.6 Continuity Check................................... 29

2.7 Diode Check......................................... 30

2.8 Duty Factor Measurement.................... 31

Chapter 3 Additional Functions 33

3.1 HOLD AUTO Function .......................... 33

3.2 HOLD Function ..................................... 34

3.3 Overflow Warning Function .................. 35

3.4 Relative Display Function .....................36

3.5 Auto Power Save Function ................... 38

3.6 Dynamic Recording Function ................ 39

3.7 Memory Function .................................. 40

Contents

Chapter 4 Specifications 43

4.1 General Specifications ..........................43

4.2 Accuracy ................................................46

4.3 L9207-10 TEST LEAD Specifications ...49

Chapter 5 Maintenace and Service 50

5.1 Replacing the Batteries and Fuses ....... 50

5.2 Cleaning ................................................52

5.3 Service ..................................................52

5.4 Error Message .......................................52

Thank you for purchasing the HIOKI "3257-50/51

DIGITAL HiTESTER". To obtain maximum perfor-

mance from the product, please read this manual

first, and keep it handy for future reference.

• When you receive the product, inspect it carefully

to ensure that no damage occurred during ship-

ping. 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.

• Before using the product the first time, verify that it

operates normally to ensure that the no damage

occurred during storage or shipping. If you find any

damage, contact your dealer or Hioki representa-

tive.

• Before using the instrument, check that the coating

of the test leads is not damaged and that no white

or red portions (insulation layers) are showing from

the inside and that no metal parts are exposed.

Using the product under such conditions could

result in electrocution. Replace the test leads and

probes with the specified Hioki Model L9207-10.

Introduction

Inspection

•L9207-10 TEST LEAD .............. 1

•Instruction Manual..................... 1

•R03 Manganese battery............ 2

(Supplied with this product,

for monitor)

•9378 CARRYING CASE*1

(

3257-50 only)

•Protective holster*2(

3257-51 only)

This manual contains information and warnings

essential for safe operation of the product and for

maintaining it in safe operating condition. Before

using the product, be sure to carefully read the fol-

lowing safety notes.

3257-50

3257-51

Accessories

Safety Notes

This product is designed to conform to IEC

61010 Safety Standards, and has been thor-

oughly tested for safety prior to shipment.

However, mishandling during use could

result in injury or death, as well as damage to

the product. Be certain that you understand

the instructions and precautions in the man-

ual before use. We disclaim any responsibil-

ity for accidents or injuries not resulting

directly from product defects.

Safety Symbols

In the manual, the symbol indicates particu-

larly important information that the user should

read before using the product.

The symbol printed on the product indicates

that the user should refer to a corresponding topic

inthemanual(markedwiththe symbol) before

using the relevant function.

Indicates that dangerous voltage may be present

at this terminal.

Indicates a double-insulated device.

Indicates a grounding terminal.

Indicates DC (Direct Current).

Indicates AC (Alternating Current).

Indicates DC (Direct Current) or AC (Alternating

Current).

The following symbols in this manual indicate the

relative importance of cautions and warnings.

Other Symbols

Accuracy We define measurement tolerances in terms of f.s.

(full scale), rdg. (reading) and dgt. (digit) values,

with the following meanings:

Indicates that incorrect operation presents an ex-

treme hazard that could result in serious injury or

death to the user.

Indicates that incorrect operation presents a sig-

nificanthazard thatcould result inserious injuryor

death to the user.

Indicates that incorrect operation presents a pos-

sibility of injury to the user or damage to the prod-

uct.

Advisory items related to performance or correct

operation of the product.

Indicates the quick guide for operations

Indicates the prohibited action

f.s. (maximum display value or scale length)

The maximum displayable value or the full length

of the scale. This is usually the maximum value of

the currently selected range.

rdg. (reading or displayed value)

Thevaluecurrentlybeing measured andindicated

on the measuring product.

dgt. (resolution)

The smallest displayable unit on a digital measur-

ing product, i.e., the input value that causes the

digital display to show a "1".

Measurement categories

This product complies with CATIII (1000 V), CATIV (600 V)

safety requirements.

To ensure safe operation of measurement products, IEC 61010

establishes safety standards for various electrical environments,

categorized as CAT II to CAT IV, and called measurement cate-

gories.

Using a measurement product in an environment designated

with a higher-numbered category than that for which the product

is rated could result in a severe accident, and must be carefully

avoided.

Use of a measurement instrument that is not CAT-rated in CAT II

to CAT IV measurement applications could result in a severe

accident, and must be carefully avoided.

CAT II Primary electrical circuits in equipment connected to

an AC electrical outlet by a power cord (portable tools,

household appliances, etc.) CAT II covers directly

measuring electrical outlet receptacles.

CAT III Primary electrical circuits of heavy equipment (fixed

installations) connected directly to the distribution pan-

el, and feeders from the distribution panel to outlets.

CAT IV The circuit from the service drop to the service en-

trance, and to the power meter and primary overcur-

rent protection device (distribution panel).

Follow these precautions to ensure safe operation

and to obtain the full benefits of the various func-

tions.

Usage Notes

• To avoid electric shock, do not allow the

product to get wet, and do not use it when

your hands are wet.

• Do not use the product where it may be

exposed to corrosive or combustible

gases. The product may be damaged or

cause an explosion.

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