Gossen MetraWatt METRAmax 6 Operating Instructions Manual

Operating instructions

METRAmax 6

Analog Multimeter

3-348-602-02

6/10.15

2 GMC-I Messtechnik GmbH

Operating Controls

1 Range selector switch
2 Rotary knob to adjust the full-scale deflection
3 Socket connectors
4 Battery compartment
5 Nose to open the meter
6 Adjustment screw for the mechanical zero

(

∞ on black scale)

6

1

2

3

5

4

1,5 V

R6

GMC-I Messtechnik GmbH 3

Table of Contents

Page

1 Safety Features and Precautions ........................................ 4

2 Description ......................................................................... 6

3 Operation ............................................................................ 7

3.1 Inserting the Battery .......................................................................... 7

3.2 Checking the Mechanical Zero ........................................................... 8

3.3 Battery Test ...................................................................................... 8

4 Measurement ..................................................................... 9

4.1 Resistance Measurement .................................................................. 9

4.1.1 Measuring in the Range up to 50 Ω (Ω x 1, red) .............................. 10

4.1.2 Measuring in the Ranges up to 1 MΩ

(Ω x 1/10/100/1000, black) ............................................................ 10

4.2 Rough Capacitance Measurement .................................................... 11

4.3 Diode and Transistor Test ................................................................ 12

4.4 Acoustic Continuity Test .................................................................. 13

5 End of Measurement ........................................................ 13

6 Characteristic Values ........................................................ 14

7 Maintenance ..................................................................... 16

7.1 Battery ........................................................................................... 16

7.2 Fusible Link .................................................................................... 16

7.2.1 Fuse Replacement .......................................................................... 16

7.3 Housing .......................................................................................... 17

7.4 Device Return and Environmentally Compatible Disposal ................... 17

8 Repair and Replacement Parts Service

Calibration Center and Rental Instrument Service ........... 18

9 Product Support ................................................................ 20

4 GMC-I Messtechnik GmbH

1 Safety Features and Precautions

This instrument fulfills the requirements of the applicable
European and national EC guidelines. We confirm this with
the CE marking. The relevant declaration of conformity can
be obtained from GMC-I Messtechnik GmbH.

The analog multimeter METRAmax 6 is manufactured in
accordance with safety regulations IEC 61010-1/EN
61010-1/VDE 0411-1. When used for its intended pur­pose, the safety of the operator, as well as that of the
instrument, is assured. Their safety is however not guaran­teed if the instrument is used improperly or handled care­lessly. It is therefore imperative that you read the operating
instructions thoroughly and carefully before placing the
METRAmax 6 into service, and that you follow all instruc­tions contained therein.

Observe the following safety precautions:

• The instrument may only be operated by persons who
are capable of recognizing contact hazards and taking
the appropriate safety precautions.

• Contact hazards exist anywhere, where voltages of
greater than 30 V may occur (effective value).

• Be prepared for the occurrence of unexpected voltages
at devices under test (e.g. defective devices).
For example, capacitors can be dangerously charged!

• Housing and measurement cables may not be dam­aged, e.g. by cracks or ruptures.

• No measurements may be made with the METRAmax 6 in
electrical circuits with corona discharge (high-voltage).

• Special care is required when measurements are made
in HF electrical circuits. Dangerous pulsating voltages
may be present.

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• Measurements under moist ambient conditions are not allow­able. Hands, shoes, floor and workplace must be dry.

• Be absolutely certain that the measuring ranges are not
overloaded beyond their allowable capacities.

Meaning of Symbols on the Instrument

indicates EC conformity

Warning concerning a point of danger.
(Attention: observe documentation!)

This device may not be disposed of with the trash.
Further information regarding the WEEE mark can be
accessed on the Internet at
www.gossenmetrawatt.com by entering the search
term ’WEEE’.

Measuring Categories and their Significance per IEC 61010-1

The measuring category and the maximum rated voltage
which is printed on the device apply to your measuring
instrument, 300 V CAT III.

CAT Definition

I

Measurements in electrical circuits which are not directly connected to
the mains: e.g. electrical systems in motor vehicles and aircraft,

batteries etc.

II

Measurements in electrical circuits which are electrically connected to the
low-voltage mains: via plug, e.g. in household, office and laboratory

applications

III

Measurements in building installations: stationary consumers, distributor
terminals, devices connected permanently to the distributor

!

6 GMC-I Messtechnik GmbH

2 Description

The METRAmax 6 is a battery-powered ohmmeter. It
excels by its handy size, ease of use, and a large measur­ing span. It is meant for measurement of resistances
between 0.05

Ω and 1 MΩ, for rough capacitance mea-

surements between 1

μF and 30,000 μF, and for continuity

tests with beeper.
The METRAmax 6 offers 9 measuring ranges for resistance

and capacitance measurements. The measuring ranges
are selected with a range switch.

The meter has a rugged movement with spring-loaded
jewels. It is widely insensitive to vibrations and shocks.

The scale is mirror-backed for exact reading of the mea­sured values.

The measuring range

Ω x 1, marked in red, and the scale

marked in red are provided for measurements of small
resistance values (0.05 Ω bis 50 Ω). To measure higher
resistance values, there are 4 measuring ranges which
have a common black scale.

A part of the two scale arcs is boldly marked. The measur­ing error, referred to the actual resistance value, is smallest
on these marked indicating ranges.

For rough capacitance measurements, there are 4 measur­ing ranges with a common scale.

A beeper is incorporated for audible continuity tests.
The connectors are protected against accidental contact. It

is recommended to use measuring leads with shockproof
connection plugs (4 mm diameter).