HIOKI 3255 50 ENG .pdf

3255-50
D I G I TA L H i T E S T E R
Field measuring instruments

Combine with

CLAMP ON PROBE
for AC current measurement

Combine with

CLAMP ON PROBE
for AC current measurement

Actual-size
http://www.hioki.co.jp/
CAT III 600V
CAT II 1000V

HIOKI company overview, new products, environmental considerations and
other information are available on our website.

For industrial power lines
S afety M easures
● Dust-proof and water-proof construction (IP54)
● Polarized terminal design prevents incorrect insertion of test leads
● Internal current-limiting resistor and fuse protect

E nhanced C onvenience
● Safe and simple
AC load current measurement by optional CLAMP-ON PROBE

against operating errors and catastrophic failures
0.44 A / 1000 V Fuse

9010, 9018

(shut-off capacity 10 kA)

3255-50

Protection
device

Current limiting resistor
In addition to internal
(5 Ω)
circuitry to protect against +
connection errors during
Tester
circuit
use, the current-limiting
COM
resistor and fast-blow fuse
protect against short-circuit conditions in the unlikely event of
catastrophic failure of the tester circuit: short-circuit current is
limited until interruption by the fuse, rated for up to 10 kA.

*If voltage is applied to the test leads while in the resistance measurement mode, as
long as it is within the measurement category (CAT III 600 V, or CAT II 1000 V),
protective components in the tester circuitry prevent the fuse from opening.

■ 3255-50 specifications (Accuracy at 23˚C±5˚C (73˚F±9˚F), 80% rh or less)

10.00

A

20.00

A

50.0

A

100.0

A

200.0
500

A
A

1000

A

420.0

Ω

± 1.0 %rdg. ± 8 dgt.

4.200 k Ω

± 0.7 %rdg. ± 4 dgt.

42.00 k Ω
420.0 k Ω
4.200 MΩ
42.00 MΩ

Continuity
(420.0 Ω)

Diode

Main unit
Accuracy

± 2.0 % rdg.
± 4 dgt.
(50Hz to 500Hz)
Add the accuracy
of clamp sensor

± 1.0 %rdg. ± 4 dgt.
± 2.0 %rdg. ± 4 dgt.
± 5.0 %rdg. ± 4 dgt.

Input impedance

1000

V ± 0.7 % rdg. ± 1.5 % rdg.
± 4 dgt.
± 4 dgt.
V

9010, 9018 (10 to 500 A)

V ±0.5%rdg.± 4dgt. ±1.1%rdg.± 4dgt.

Range table of clamp on probe

42.00
420.0

Appox.

10 MΩ

Appox.

11 MΩ

Appox.

10 MΩ

Appox.

10 MΩ

3.4 Vmax.
Appox.

0.7 V

Appox.

0.5 V

A built-in buzzer sounds when the resistance Open-circuit terminal voltage
value is less than 45 Ω ± 35 Ω

(±1.0 %rdg. ± 8 dgt.)

Judgment
(0.15 V to 2.00 V)

3.4 Vmax.

Open terminal voltage/current

3.4 V/850 µA max.

Overload
protection
Current limiting resistor: 5 Ω, Fuse: 0.44 A / 1000 VAC/DC (shut-off capacity 10 kA)

420.0 mV ± 1.0 % rdg. ± 2.0 % rdg.
± 4 dgt.
± 4 dgt.
4.200 V

Notes

1000 V DC/AC rms(sin) or 107 V·Hz, 1 minute

Accuracy
AC 50Hz to 500Hz
Input impedance

DC

Open-circuit terminal voltage

Resistance

AC current Clamp sold separately AC / DC voltage

Range

Set the clamp range to match
the range of the 3255 -50

● Option
CLAMP ON PROBE

R a n g e
Accuracy(45 - 66 Hz)
Frequency characteristic
Output voltage
Max. rated voltage to earth
Meas. conductor dia.
Dimensions and mass

9010

9018

AC 10/20/50/100/200/500 A
±1.5 %rdg. ±0.1% f.s.
±3 % f.s.
40 Hz to 1 kHz: ±6 %
40 Hz to 3 kHz: ±1 %
AC 0.2 V f.s.
600 V rms (insulated conductor)
φ 46 mm, 50 × 20 mm busbar
74W × 184H × 37D mm, 420 g(9010), 410 g(9018)
Lead length approx. 3 m

● AC Measurement: average value ● Ancillary functions:
automatic and manual range, data hold, auto power save, battery
life warning ● Display: 4199 max. (1099 for 1000 V range) ●
Sampling rate: 2.5 samples/sec ● Applicable standards:
Safety - EN61010 CAT III 600V, CAT II 1000 V, EMC EN61326, Dust-proof and water-proof structure - EN60529 IP54
● Ambient temperature / humidity: 0 to 40˚C (32˚F to 104˚F) 80%
rh (no condensation) ● Storage temperature/ humidity range: -20
to 40˚C (-4˚F to 104˚F) 80% rh / 40 to 60˚C (104˚F to 140˚F) 70% rh(no
condensation) ● Power source: R03 manganese battery✕2 or
LR03 alkaline battery ✕2 ● Continuous operation: In DC
voltage approx. 200 hours (with manganese batteries), approx. 500
hours or more (with alkaline batteries) ● Dimensions and Mass:
Approx. 70 W ✕145 H ✕ 31 D mm, approx. 210g (Approx 2.8˝ W ✕
5.8˝ H ✕1.3˝ D, 7.5 oz.)(including batteries)

cord length 70 cm

Includes 9207-10 TEST LEAD and 9371 CARRYING CASE
РАДАР - ОФИЦИАЛЬНЫЙ ДИЛЕР HIOKI

HEAD OFFICE :
81 Koizumi, Ueda, Nagano, 386-1192, Japan
TEL +81-268-28-0562 / FAX +81-268-28-0568
E-mail: os-com@ hioki.co.jp
HIOKI USA CORPORATION :
6 Corporate Drive, Cranbury, NJ 08512 USA
TEL +1-609-409-9109 / FAX +1-609-409-9108
E-mail: hioki@ hiokiusa.com

Shanghai Representative Office :
1704 Shanghai Times Square Office
93 Huaihai Zhong Road
Shanghai, 200021, P.R.China
TEL +86-21-6391-0090, 0092
FAX +86-21-6391-0360
E-mail: info@hioki.cn

All information correct as of Oct 3, 2003. All specifications are subject to change without notice.

РОССИЯ, 198152, Санкт-Петербург
Краснопутиловская ул., д.25
Тел./факс +7 (812) 600-48-89
Тел.: +7 (812) 375-32-44
www.radar1.ru
325550E2-3XB-05U Printed in Japan
info@radar1.ru

Instruction Manual

3255-50
DIGITAL HiTESTER

June 2013 Revised edition 7 3255D981-07 13-06H

i

Contents

Contents
Introduction ............................................................... 1
Inspection.................................................................. 1
Safety Notes ............................................................. 2
Usage Notes ............................................................. 6

Chapter 1
1.1
1.2
1.3

3.2
3.3
3.4

Measurement Procedures

19

Pre-Operation Inspection .......................... 19
Connection ................................................ 22
Voltage Measurement ............................... 24
Current Measurement ............................... 26
Resistance Measurement.......................... 29
Continuity Check ....................................... 30
Diode Check.............................................. 31

Chapter 3
3.1

13

Product Overview ...................................... 13
Features .................................................... 13
Parts Names and Functions ...................... 14

Chapter 2
2.1
2.2
2.3
2.4
2.5
2.6
2.7

Overview

Additional Functions

33

Auto Range Function and Manual Range
Function..................................................... 33
HOLD AUTO Function............................... 35
Overflow Warning Function ....................... 36
Auto Power Save Function........................ 37

ii

Contents

Chapter 4
4.1
4.2
4.3

39

General Specifications .............................. 39
Accuracy ................................................... 43
L9207-10 TEST LEAD Specifications ....... 45

Chapter 5
5.1
5.2
5.3

Specifications

Maintenace and Service

47

Replacing the Batteries and Fuses ........... 47
Cleaning and Storage ............................... 50
Service ...................................................... 51

Introduction

1

Introduction
Thank you for purchasing the HIOKI "3255-50
DIGITAL HiTESTER." To obtain maximum performance from the product, please read this manual
first, and keep it handy for future reference.

Inspection
When you receive the product, 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
• L9207-10 TEST LEAD ................................... 1
• Instruction Manual.......................................... 1
• R03 Manganese battery................................. 2
(Supplied with this product, for monitor)
• 9371 CARRYING CASE ................................ 1

Options
• 9010-50 CLAMP ON PROBE
• 9018-50 CLAMP ON PROBE
• 9704
CONVERSION ADAPTER
(When used in combination with the
9010-50/9018-50)

2

Safety Notes

Safety Notes
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 following safety notes.

This product is designed to conform to 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 product. 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 product defects.

Safety Notes

3

Safety Symbols
In the manual, the
symbol indicates particularly 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
in the manual (marked with the
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).

Symbols
The following symbols in this manual indicate the
relative importance of cautions and warnings.
Indicates that incorrect operation presents an extreme hazard that could result in serious injury or
death to the user.
Indicates that incorrect operation presents a significant hazard that could result in serious injury or
death to the user.
Indicates that incorrect operation presents a possibility of injury to the user or damage to the product.
Advisory items related to performance or correct
operation of the product.