General Instructions; Precautions And Safety Measures; Before Using; When Using The Instrument - Multimetrix DMM 240 Notice De Fonctionnement

Chapter II

1. GENERAL INSTRUCTIONS

1.1

Precautions and safety measures

1.1.1 Before using

You have just acquired a DMM240 RMS multimeter. Thank you for your
confidence. It measures AC/DC Voltage, AC/DC Current, Resistance,
Frequency (electrical & electronic), and test diodes and Continuity. It
features a waterproof, rugged design for heavy duty use. Proper use
and care of this multimeter will provide many years of reliable service.
This multimeter complies with the IEC 61010 standard concerning
electronic measurement instruments. For your own safety and to
prevent damage to the instrument, follow the instructions in this manual.
Be careful to adhere to storage conditions.
This handheld autonomous instrument was designed for:
∗ Indoor use
∗ Use in pollution 2 degree environments
∗ In altitudes lower than 2,000 meters
∗ In temperatures ranging from 5° C to 40° C
It can be used up to 1000 V on category III circuits, or 600 V on
category IV circuits.
Definition of installation categories (cf. IEC 664-1)
CAT I: Circuits protected by devices designed to
minimize transient overvoltage at a low level.
E.g. protected electronic circuits.
CAT II: Domestic or analogue appliances' power supply
circuits that can include average value transient
overvoltage.
E.g. power supply to domestic appliances and portable tools.
CAT III: Power appliances' supply circuits that can include high
transient overvoltage.
E.g. machinery or industrial apparatus power supply.
CAT IV: Circuits that can include very high transient overvoltage.
E.g. energy inputs
For safety reasons, you should only use leads and measurement
accessories suitable for use with the voltage and overvoltage category
of the circuit to be measured that comply with the IEC 61010 standard.
Do not use the instrument or its leads if they appear damaged.

1.1.2 When using the instrument

- Never exceed the protection limiting values indicated in the
specifications for each type of measurement.
- When the multimeter is connected to the circuits to be measured, do
not touch any unused terminals.
- Before changing function, disconnect the measurement leads from the
circuit measured.
- Never measure resistances or test diodes, etc., on a live circuit.
DMM240
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