HT Instruments DM40 Manual De Instrucciones página 37

5. MEASURING CONDITIONS
Measuring range
The instrument's measuring range is 40m. At night,
under poor visibility conditions or if the surface to be
measured is in shadow, the measuring range can be
reduced. To prevent this, carry out measurements
during the day or use luminous plates when the object
to be measured has poor reflecting properties.
Object surface
The instrument can give errors when measurements
are carried out on colourless liquids (e.g. water),
transparent glass, polystyrene, very polished or half-
permeable surfaces because of the deviation of the
laser beam. Non-reflecting surfaces may cause delays
when measuring.
Maintenance
Do not immerse the instrument in water. To clean the
instrument, use a soft cloth moist with neutral
detergent
6. REPLACING INTERNAL BATTERIES
The instrument is supplied by 2x1.5V AAA LR03
alkaline batteries. When the symbol "
on the display, it is necessary to replace the batteries.
Proceed as follows:
1. Loosen the battery compartment cover fastening
screw and remove the cover (see Fig. 9)
2. Remove the batteries and insert the same number
of batteries of the same type, respecting the correct
polarity. Only use alkaline batteries
3. Restore the battery compartment cover and fasten
the relevant screw
EN - 16
DM40
" flashes