HT instruments HT309 - Manual (Page 3)

HT309
EN - 2
1. PRECAUTIONS AND SAFETY MEASURES
The instrument has been designed in compliance with the safety directives relevant to
electronic measuring instruments. In order to prevent damaging the instrument, please
carefully follow the procedures described in this manual and read all notes preceded by
the symbol
with the utmost attention. Before and after carrying out the measurements,
carefully observe the following instructions:
• Do not carry out any measurements in case gas, explosive materials or flammables are
present, or in dusty environments
• Do not carry out any measurement in humid environments
• Do not carry out any measurement in case you find anomalies such as deformation,
breaks, substance leaks, absence of display on the screen, etc.
• Do not touch the photodiode sensor while carrying out measurements, in order to
prevent any damage to the instrument caused by static electricity or contamination
The following symbol is used in this manual:
Caution: observe the instructions given in this manual. Improper use could
damage the instrument and/or its components.
1.1. PRELIMINARY INSTRUCTIONS
• In order to prevent incorrect reading, replace the battery when the symbol “ ”
appears on the display when switching on the instrument.
1.2. DURING USE
Please carefully read the following recommendations and instructions.
CAUTION
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.
• 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 instrument.
• If the instrument is not to be used for a long time, remove the battery.