During Use; After Use; Definition Of Measurement (Overvoltage) Category - HT 8041 Manual De Instrucciones

1.2. DURING USE

Please carefully read the following recommendations and instructions:
Failure to comply with the caution notes and/or instructions may damage the
instrument and/or its components or be a source of danger for the operator.
 Before switching on the clamp, remove the conductor from the clamp jaw
 During current measurement, any other current near the clamp may affect
measurement precision.
 When measuring current, always put the conductor as near as possible to the middle of
the clamp jaw in order to obtain the most accurate reading
 While measuring, if the value or the sign of the quantity being measured remain
unchanged, check if the HOLD function is enabled.

1.3. AFTER USE

 When measurement is complete, switch off the clamp
 If the instrument is not to be used for a long time, remove the batteries

1.4. DEFINITION OF MEASUREMENT (OVERVOLTAGE) CATEGORY

Standard IEC/EN61010-1: Safety requirements for electrical equipment for measurement,
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control and laboratory use, Part 1: General requirements
category, commonly called overvoltage category, is. § 6.7.4: Measured circuits, circuits are
divided into the following measurement categories:
(OMISSIS)
 Measurement category IV is for measurements performed at the source of the low-
voltage installation.
Examples are electricity meters and measurements on primary overcurrent protection devices
and ripple control units.
 Measurement category III is for measurements performed on installations inside
buildings.
Examples are measurements on distribution boards, circuit breakers, wiring, including cables,
bus-bars, junction boxes, switches, socket-outlets in the fixed installation, and equipment for
industrial use and some other equipment, for example, stationary motors with permanent
connection to fixed installation.
 Measurement category II is for measurements performed on circuits directly
connected to the low-voltage installation.
Examples are measurements on household appliances, portable tools and similar equipment.
 Measurement category I is for measurements performed on circuits not directly
connected to MAINS.
Examples are measurements on circuits not derived from MAINS, and specially protected
(internal) MAINS-derived circuits. In the latter case, transient stresses are variable; for that
reason, the standard requires that the transient withstand capability of the equipment is made
known to the user.
CAUTION
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EN - 3
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HT8041