Connecting The Measuring Cables - Wetekom 9804 Bedienungsanleitung

2. Before Use

2.2 Connecting the Measuring Cables

Important! The maximum allowable input voltage is 300 V (CAT IV) 600 V
(CAT III) resp. 1000 V (CAT II) and may not be exceeded.
The measuring cables provided are capable of taking measurements up to a
maximum of 1000 V AC/DC, max 20 Ampere. The measurement of high
voltages should always be performed with great care and only when a person
trained in first aid is present.
If the measuring range is exceeded, on the display the overload symbol
"1" will appear. For this case, select a higher measuring range.
Measuring Category Explanation (CAT I, CAT II, CAT III, CAT IV)
The measuring category I is intended for taking measurements on circuitry not
directly connected to the power mains.
The measuring category II is intended for taking measurements on low-
voltage circuitry. Examples for this are household appliances, mobile electric
devices or similar equipment.
The measuring category III is intended for taking measurements on house
installations. Examples are distribution boxes, circuit breakers, wiring, terminal
strips, connectors, switches, and wall sockets of the fixed installations, but also
for measurements on industrial devices and equipment such as permanently
installed motors.
The measuring category IV is intended for taking measurements on the
source of the low voltage installation. Examples are power meters and
measurements on primary overcurrent circuit breakers and remote mains
control devises.
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