GW Instek GDM-8245 User Manual
DUAL DISPLAY DIGITAL
MULTIMETER
MODEL: GDM-8245
User Manual
Good Will Instrument Co., Ltd.
GW Part No. 82DM-82450MI
Declaration of Conformity
We
GOOD WILL INSTRUMENT CO., LTD.
No. 7-1, Jhongsing Rd, Tucheng City, Taipei County 236. Taiwan
GOOD WILL INSTRUMENT (SUZHOU) CO., LTD.
No.69 Lushan Road, Suzhou New District Jiangsu, China.
declares that the below mentioned product
GDM-8245
is herewith confirmed to comply with the requirements set out in the Council Directive
on the Approximation of the Law of Member States relating to Electromagnetic
Compatibility (89/336/EEC, 92/31/EEC, 93/68/EEC) and Low Voltage Equipment
Directive (73/23/EEC, 93/68/EEC).
For the evaluation regarding the Electromagnetic Compatibility and Low Voltage
Equipment Directive, the following standards were applied:
◎ EMC
EN 61326-1: Electrical equipment for measurement, con trol and laboratory use ––
EMC requirements (1997+A1: 1998)
Conducted and Radiated Emissions
EN55011 Group II class B: 1998
Current Harmonic
EN 61000-3-2: 1995
Voltage Fluctuation
EN 61000-3-3: 1995
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◎ Safety
Low Voltage Equipment Direc ti ve 73/23/EEC & amended by 93/ 6 8/E EC
IEC/EN 61010-1: 2001
Electrostatic Discharge
EN 61000-4-2: 1995
Radiated Immunity
EN 61000-4-3: 1996
Electrical Fast Transients
EN 61000-4-4: 1995
Surge Immunity
EN 61000-4-5: 1995
Conducted Susceptibility
EN 61000-4-6: 1996
Voltage Dips/ Interrupts
EN 61000-4-11: 1994
DUAL DISPLAY DIGITAL MULTIMETER
USER MANUAL
DUAL DISPLAY DIGITAL MULTIMETER
USER MANUAL
TABLE OF CONTENTS PAGE
1. SAFETY SUMMARY……………………………………………… 1
2. INTRODUCTION…………………………………… ……… …….. 5
3. SPECIFICATION………………………………………………….. 6
4. OPERA TION INSTRUCTION……………………………………. 11
5. MEASUREMENT TUT ORIAL…...………………… ……………. 14
6. MEASUREMENT TECHNIQUES ......……………………… …… 18
7. MAINTENANCE…………………………………………………... 22
1.SAFETY SUMMARY
Please take a moment to review these safety terms and symbols
which may appear in this manual or on Equipment to prevent
damage to the instrument.
WARNING. Warning statements identify condition or
practices that could result in injury or loss of life.
CAUTION. Caution statements identify conditions or
practices that could result in damage to this product or
other property.
Measurement category I is for measurements performed on circuits not
directly connected to MAINS.
Measurement category II is for measurements performed on circuits
directly connected to the low voltage installation.
Measurement category III is for measurements performed in the building
installation.
Measurement category IV is for measurements performed at the source of
the low-voltage installation.
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DUAL DISPLAY DIGITAL MULTIMETER
USER MANUAL
DANGER High Voltage
DUAL DISPLAY DIGITAL MULTIMETER
USER MANUAL
FOR UNITED KINGDOM ONLY
NOTE: This lead/appliance must only be wired by
competent persons
ATTENTION refer to Manual
Protective Conductor Terminal
(ground) Earth Terminal
Frame or Chassis Terminal
WARNING: THIS APPLIANCE MUST BE EARTHED
IMPORTANT: The wires in this lead are coloured in
accordance with the following code:
Green/ Yellow: Earth
Blue: Neutral
Brown: Live(Phase)
As the colours of the wires in main leads may not correspond
with the colours marking identified in your plug/appliance,
proceed as follows:
The wire which is coloured Green & Yellow must be
connected to the Earth terminal marked with the letter E or by
the earth symbol
or coloured Green or Green & Yellow.
The wire which is coloured Blue must be connected to the
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DUAL DISPLAY DIGITAL MULTIMETER
USER MANUAL
DUAL DISPLAY DIGITAL MULTIMETER
USER MANUAL
terminal which is marked with the letter N or coloured Blue or
Black.
The wire which is coloured Brown must be connected to the
terminal marked with the letter L or P or coloured Brown or
Red.
If in doubt, consult the instructions provided with the
equipment or contact the supplier.
This cable/appliance should be protected by a suitably rated
and approved HBC mains fuse : refer to the rating
information on the equipment and/or user instructions for
details. As a guide, cable of 0.75mm² should be protect ed by
a 3A or 5A fuse. Larger conductors would normally require
13A types, depen ding on the conne ction method used.
Any moulded mains connector that requires removal
/replacement must be destroyed by removal of any fuse &
fuse carrier and disposed of immediately, as a plug with
bared wires is hazardous if a engaged in live socket. Any rewiring must be carried out in accordance with the information
detailed on this label.
2. INTRODUCTION
This instrument is a portable, bench-type dual display digital
multimeter with a good-performance 50000 counts designed for general
purpose application. The dual display allows you to display two functions
of the input signal being measured.
Features
z 50000 counts DMM
z Multi-function ACV, DCV, ACA, DCA, R, C , Hz, Continuity Beeper,
Diode Test, MAX/MIN, REL, HOLD, dBm
z Dual display Indicate ACV and Hz or DCV (ACV) and dBm
z Manual or Autoranging
z 0.03% DCV accuracy
z 20A high current range
z 1000V high voltage range
z AC True RMS or AC+DC True RMS.
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