Gossen MetraWatt METRAmax 2 Operating Instructions Manual
Operating instructions
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METRAmax 2
Analog multimeter
3-348-734-02
3/3.97
2 GOSSEN-METRAWATT
Contents
Page
1 Safety features and safety precautions ....................4
2 Description ................................................................ 5
3 Operation ...................................................................6
3.1 Operating controls .............................................................. 6
3.2 Getting started .................................................................... 6
3.2.1 Connecting the battery ..........................................................6
3.2.2 Checking the mechanical zero ...............................................7
3.2.3 Checking the electrical zero ................................................... 7
3.2.4 Battery test ........................................................................... 7
3.3 Voltage measurement .........................................................8
3.3.1 DC voltage measurement ...................................................... 8
3.3.2 Direct AC voltage measurement up to 300 V .......................... 8
3.3.3 AC voltage measurement with superimposed
DC voltage component ..........................................................9
3.4 Current measurement .......................................................10
3.4.1 Direct DC current measurement ........................................... 10
3.4.2 DC current measurement via shunts ....................................10
3.4.3 AC current measurement .................................................... 11
3.5 End of measurement ........................................................11
4 Specifications ..........................................................12
5 Maintenance ........................................................... 14
5.1 Battery replacement .........................................................14
5.2 Fuse replacement ............................................................. 14
5.3 Cleaning ............................................................................14
6 Repair and replacement parts service ....................15
GOSSEN-METRAWATT 3
1 Safety features and safety precautions
The analog multimet er MET RAmax 2 is cons tructe d in comp lianc e
with the safety rules of IEC 1010-1/EN 61010-1/VDE 0411-1.
When properly used, the safety of both the user and the meter is
assured. Their safety is not assured, however, if the meter is misused or careles s ly ha n d le d. Th a t is why it is absolutel y n ec es sary
to carefully and completely read these operating instructions before
using the METRAmax 2 and to follow them in all respects.
Please note the following safety precautions:
• The meter must only be operated by persones who understand the danger of shock hazards and know how to apply safety precautions.
• Shock hazards exist wherever voltages of more than 30 V (RMS value)
to ground can appear.
• It must be taken into account that unexpected voltages can appear on
devices under test (e.g. defective devices).
Capacitors may be charged dangerously, for instance!
• Case and test leads must be in good condition, e. g. no cra cks or broken
spots.
• The METRAmax 2 must not be used for measurements on circuits with
corona discharge (high voltage!).
• Be particularly careful when measuring on HF circuits.
Dangerous composite voltages may exist there.
• Measurements under moist environmental conditions are not permitted. Hands, shoes, floor and working site must be dry.
• Absolutely verify that overloading of the measuring ranges does not
exceed the permissible limits.
4 GOSSEN-METRAWATT
2 Description
On the METRAmax 2, the measuring ranges are selected with a
sliding function switch and a rotary range selector switch. The scale
is mirror-backed.
The rugged plastic case and the spring-loaded jewel bearings of
the stray-field-insensiti ve moving-c oil movem ent with core magnet
protect the meter against damages in the case of severe mechanical stress.
The electrical zero of the pointer can be positioned at mid-scale.
This allows for bipolar DC vo ltage and DC current measurements
regardless of the polarity.
The connection s o ckets are protect ed against accident al contact.
Both the special test leads with contact-pro tected connection
plugs and all test leads with commercial banana plugs (4 mm diam eter) can be use d .
The DC current meas uring ran ges can be ex panded by mean s of a
shunt (e.g. 10 A/100 mV).
The meter is of s ervice-friendly design.
GOSSEN-METRAWATT 5
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