Amprobe DM-4 Power-Quality-Recorder - Manual (Page 4)

1. PRECAUTIONS AND SAFETY MEASURES
1.1 GENERAL
For your own safety and to avoid damaging the instrument we suggest you follow
the procedures hereby prescribed and to carefully read all the notes preceded by
the symbol m.
Before and during measurements please be very diligent in following instructions below:
• Do not measure voltage or current in wet or dusty places
• Do not measure in presence of gas, explosive materials or combustibles
• Do not touch the circuit under test if no measurement is being taken
• Do not touch exposed metal parts, unused terminals, circuits and so on
• Do not use the instrument if it seems to be malfunctioning
• Use only cables and accessories approved by Amprobe
The following symbols are used in this manual:
m
Caution: keep to what is prescribed by the manual. An incorrect use could
damage the instrument or its components
c
High voltage: risk of electric shock
1.2 PRELIMINARY INSTRUCTIONS
• This instrument has been designed for use in places with pollution class 2.
• It can be used for voltage and current measurements in installations of excess
voltage category III 600 V~ phase to phase / 346 V~ phase to earth and of excess
voltage category II 1000 V~ phase to phase / 577 V~ phase to earth.
3
DM-4 Power Quality Recorder