Making Measurements; Unusual Faults And Stresses; Definitions - AOIP CALYS 150 Mode D'emploi

Making measurements

Measuring wires and leads must be in good condition and must be replaced if their insulation appears defective (insulation
cut, burned, etc.).
When the unit is connected to the measurement circuit, the terminals may be dangerous. Also, never place your hands near
a terminal, whether in use or not. This advice also applies to the battery charger sockets and the USB link connected directly
or indirectly to the terminals of the unit. Any work on these circuits must be carried out with the unit disconnected from any
other external circuit.
Never exceed the limiting values of protection indicated in the specifications. Refer to chapter A.
When the order of magnitude of the value to be measured is unknown, make sure that the starting measurement range is
the highest possible, or choose the automatic range selection mode.
Before changing the function, disconnect the wires for measuring the external circuit. When measuring current and/or voltage
-even if low-, remember that the circuits may be live at a voltage that is dangerous for the operator.
Never carry out resistance measurements on a live circuit.

Unusual faults and stresses

Whenever it is believed that the protection has been damaged, switch off the unit and ensure that it is not used prematurely.
The protection may have been damaged if, for example:
There is obvious damage to the unit.
The unit is no longer able to make accurate measurements.
The unit has been stored under unfavorable conditions.
The unit has been subjected to severe stress during transportation.

Definitions

A.4.7.1 Definition of the installation category
This is also known as the overvoltage category.
It is the classification of the installation according to standard limits for transient overvoltages (standard CEI 664).
A.4.7.2 Table of symbols used
Symbol Description
Warning: see accompanying documents
Earth point
Complies with European Union directives
CAT II Pol 2
Category II, Pollution 2.
60V
Maximum common mode voltage compared with the ground = 60 V
Do not discard. See chapter Used devices (see section A.4.3)
Do not discard. See chapter Used devices (see section A.4.3)
Bluetooth® compatible unit
A
Safety
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