General Instructions; Introduction - Metrix MX 430B Notice De Fonctionnement

Multimètre

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1.1 GENERAL

This 40 000 W / V analog multimeter with its wide range of measurement

capabilities is perfectly adapted to the needs of electrical and electronic

engineer. A single combined range and function rotary switch will make this

instrument easy to use.

It has a good insulation (3 kV) and has no metallic protruding parts. Of rugged

construction it is handy to carry. As well as rubber shock absorber surround

or a carrying case many accessories are available on request. The instrument

i s f i t t e d w i t h a f o l d i n g s t a n d .

1.2 PARTICULARITIES

This multimeter will support an accidental short overload of 240 V AC on all

ranges without other damage than blown fuses. The protection of current

ranges (< 15 mA) and 50 - 150 mV DC relies on non linear components. All

volts ranges are protectec against mains accidental ocerloads through the

use of generously rated components. The protection of current ranges

( > 15 mA) is obtained through fuses. One of them has a high current cutting-

off power 10 A/80 kA in the common.

Fuses and batteries are easily accessible at the back of the case. A linear

ohmmeter gives constant precision and resolution at low resistance i. e. :

ranges 0 - 50 W and 0 - 500 W .

1.3 GENERAL INSTRUCTIONS

1 . 1 . 1 . 1 . 1 . If the order of a measurement is not known, start measuring with

the meter set to its highest range ; turn down later if necessary.

Highest accuracy is obtained when the deviation is greatest.

2 . 2 . 2 . 2 . 2 . Before making a measurement, check that the pointer is at zero.

If not, adjust with the screw situated at the rear.

3 . 3 . 3 . 3 . 3 . Make sure that the function switch is correctly set before making

a measurement, e.g. do not try to measure volts when the function

switch is at ohms or at mA.

MX 430B

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