METREL MD 9020 User manual
METREL MD 9020
Electrical & Electronic Bench and Field Service
Digital Multimeter with Temperature
MD 9020
User Manual
Bedienungsanleitung
Version 1.1, Code no. 20 751 286
Distributor:
METREL d.d.
Ljubljanska cesta 77
1354 Horjul
Slovenia
e-mail: [email protected]
web site: http://www.metrel.si/
Metrel GmbH
Mess und Prüftechnik
Orchideenstrasse 24
90542 Eckental -Brand
Germany
E-mail: [email protected]
Internet: http://www.metrel.de/
Metrel UK
Test & Measurement
Unit 1, Hopton House,
Ripley Drive,
Normanton Industrial Estate,
Normanton,
West Yorkshire
WF6 1QT
Great Britain
E-mail: [email protected]
Internet: http://www.metrel.co.uk/
© 2007 METREL
Mark on your equipment certifies that this equipment meets the requirements of the EC
(European Community) regulations concerning safety and electromagnetic compatibility.
No part of this publication may be reproduced or utilized in any form or by any means
without permission in writing from METREL.
2
MD 9020 Electrical & Electronic DMM Table of contents/ Inhalt
3
Table of contents/ Inhalt
English
1 Safety ...........................................................................................................................4
2 Cenelec Directives........................................................................................................6
3 Product Description ......................................................................................................7
4 Operation......................................................................................................................8
5 Maintenance...............................................................................................................14
6 Specification ...............................................................................................................16
LIMITED WARRANTY...................................................................................................20
Deutsch
1 Sicherheit....................................................................................................................21
2 Cenelec-Richtlinien.....................................................................................................23
3 Produktbeschreibung..................................................................................................24
4 Betrieb........................................................................................................................25
5 Wartung......................................................................................................................31
6 Technische Daten.......................................................................................................33
EINGESCHRÄNKTE GARANTIE..................................................................................38
MD 9020 Electrical & Electronic DMM Safety
4
1 Safety
This manual contains information and warnings that must be followed for operating the
instrument safely and maintaining the instrument in a safe operating condition. If the
instrument is used in a manner not specified by the manufacturer, the protection
provided by the instrument may be impaired. The meter is intended only for indoor use.
The meter (all versions) is protected, against the users, by double insulation per
UL3111-1(1994), CSA C22.2 No. 1010-1-92, EN61010-1(1995) and IEC61010-1(1995)
to CAT II 1000V & CAT III 600V.
Standard CE version series Terminals (to COM) ratings:
V :Category II 1000 Volts AC & DC, and Category III 600 Volts AC & DC.
A / mAA : Category II 250 Volts ac and 150 Volts dc.
Protection-reinforced CE + UL version series Terminals (to COM) ratings:
V :Category II 1000 Volts AC & DC, and Category III 600 Volts AC & DC.
A / mAA : Category III 500 Volts AC and 300 Volts DC.
*Look for UL listed logo printed on meter
PER IEC61010 OVERVOLTAGE INSTALLATION CATEGORY
OVERVOLTAGE CATEGORY II
Equipment of OVERVOLTAGE CATEGORY II is energy-consuming equipment to be
supplied from the fixed installation.
Note – Examples include household, office, and laboratory appliances.
OVERVOLTAGE CATEGORY III
Equipment of OVERVOLTAGE CATEGORY III is equipment in fixed installations.
Note – Examples include switches in the fixed installation and some equipment for
industrial use with permanent connection to the fixed installation.
Terms in this manual:
WARNING identifies conditions and actions that could result in serious injury or even
death to the user.
CAUTION identifies conditions and actions that could cause damage or malfunction
in the instrument.
WARNING
To reduce the risk of fire or electric shock, do not expose this product to rain or
moisture. To avoid electrical shock hazard, observe the proper safety precautions when
working with voltages above 60 VDC or 30 VAC rms. These voltage levels pose a
potential shock hazard to the user. Do not touch test lead tips or the circuit being tested
while power is applied to the circuit being measured. Keep your fingers behind the
finger guards of the test leads during measurement. Inspect test leads, connectors, and
probes for damaged insulation or exposed metal before using the instrument. If any
defects are found, replace them immediately. Do not measure any current that exceeds
the current rating of the protection fuse. Do not attempt a current measurement to any
circuit where the open circuit voltage is above the protection fuse voltage rating.
Suspected open circuit voltage should be checked with voltage functions. Never attempt
MD 9020 Electrical & Electronic DMM Safety
a voltage measurement with the test lead inserted into the A/mA or A input jack. Only
replace the blown fuse with the proper rating as specified in this manual.
CAUTION
Disconnect the test leads from the test points before changing functions. Always set the
instrument to the highest range and work downward for an unknown value when using
manual ranging mode.
INTERNATIONAL ELECTRICAL SYMBOLS
!Caution ! Refer to the explanation in this Manual
Caution ! Risk of electric shock
Earth (Ground)
Double Insulation or Reinforced insulation
Fuse
AC--Alternating Current
DC--Direct Current
5
MD 9020 Electrical & Electronic DMM Cenelec Directives
6
2 Cenelec Directives
The instruments conform to CENELEC Low-voltage directive 73/23/EEC and
Electromagnetic compatibility directive 89/336/EEC.
MD 9020 Electrical & Electronic DMM Product Description
7
3 Product Description
This user's manual uses only representative model for illustrations. Please refer
specification details for function availability to each model.
3-3/4 digits 4000 counts LCD
display
Push-buttons for special
functions & features
Selector to turn the Power
On or Off and select a
function
Input Jack (+) for 10A (20A
for 30sec) current function
Input Jack (+) for all functions
EXCEPT current (
A, mA, A)
function
Common (Ground reference)
Input Jack (-) for all functions
Input Jack (+) for milli-amp
and micro-amp functions
MD 9020 Electrical & Electronic DMM Operation
8
4 Operation
DC Voltage, AC Voltage, & Hz Frequency functions
Note:
AC 400.0mV range selection is by RANGE button manually, and is specified from
AC 1.
DC 400.0mV range is designed with 1000Mhigh input impedance for least
current drain in measuring small signals, and can cope better with most
commercially available voltage output transducers and adapters. The non-zero
display reading is normal when the meter inputs are open circuit, which will not
affect actual measurement accuracy. Open input is actually a floating condition,
which is not a zero-volt-input condition. The meter will show zero or close to zero
reading when the inputs are shorted.
MD 9020 Electrical & Electronic DMM Operation
9
Resistance, and Continuity functions
Defaults at . Press SELECT button momentarily to select Continuity function
which is convenient for checking wiring connections and operation of switches. A
continuous beep tone indicates a complete wire.
CAUTION
Using Resistance, Continuity, Diode or Capacitance function in a live circuit will produce
false results and may damage the instrument. In many cases the suspected component
must be disconnected from the circuit to obtain an accurate measurement reading.
MD 9020 Electrical & Electronic DMM Operation
10
Diode test, Capacitance functions
Defaults at . Press SELECT button momentarily 2 times to select Diode test
function. Normal forward voltage drop (forward biased) for a good silicon diode is
between 0.400V to 0.900V. A reading higher than that indicates a leaky diode
(defective). A zero reading indicates a shorted diode (defective). An OL indicates an
open diode (defective). Reverse the test leads connections (reverse biased) across the
diode. The digital display shows OL if the diode is good. Any other readings indicate the
diode is resistive or shorted (defective).
Defaults at . Press SELECT button momentarily 3 times to select Capacitance
function. Relative zero mode can be used to zero out the parasitic capacitance of the
leads and the internal protection circuitry of the meter when measuring low capacitance
in the order of Pico Farad (pF).
CAUTION
Discharge capacitors before making any measurement. Large value capacitors should
be discharged through an appropriate resistance load
A, mA, and A Current functions
Default at DC. Press SELECT button momentarily to select AC.
Table of contents
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