Pentax R-2501NS Instruction Manual page 10

• There is a possibility that the distance may not be correctly measured when measuring a
target in the direction where there is a reflecting object (mirror, stainless board, white wall,
etc.) or under too strong sunlight.
• In a situation where high accuracy may not be expected, perform the measurement by
Reflector sheet or Prism.
• When using reflector sheet, set the reflector sheet to have its surface to be approx. vertical
to the aiming line. If it is positioned not to be approx. right angle, there is a possibility that
correct distance measurements may be impossible by dispersion or reduction of laser beam.
In the following environments, the distance may not be possible to be measured; there is a
reflecting thing (mirror, stainless board, white wall, etc.) in the direction of the target, and
under too strong sunlight
[Battery & charger]
• Do not use any battery or battery charger that is not approved by Pentax as it entails a risk
of damaging the instrument.
• If water should happen to splash on the instrument or the battery, wipe it off immediately
and allow it to dry in a dry location. Do not put the instrument in the case until it is
completely dry as this may result in damage to the instrument.
• Turn off the power when removing the battery from the instrument as removing the battery
while the power is still on may result in damage to the instrument.
• The battery mark displayed on the instrument is only an estimation of remaining battery
power and is not completely accurate. Replace the battery quickly when it is about to run
out of power as the time a battery lasts on one full charge differs depending on conditions
of ambient temperature, and the measurement mode of the instrument.
• Confirm the battery level remaining before operating.
[LD POINT, laser pointer]
When you make a correct direction using the "LD POINT", aim the laser beam at the wall and
mark the centre and then confirm the discrepancy between the reticle centre and the marked
point beforehand.
[Storage and operating environment]
• To prevent making short-circuit when removing the battery and charger from the case and
storing them, apply electric resistant tape to the poles of the battery. Storing the battery and
charger as it may result in fire or burn injury due to short-circuit.
• Avoid storing the instrument in places subject to extreme high, low or radically fluctuating
temperature. (Ambient temperature range during use: –20° C to +50° C)
• Distance measurements may take longer when atmospheric conditions are poor such as
when heat shimmer occurs. When storing the instrument, always put it in its case and avoid
storage in dusty location or location subject to vibration or extreme heat or humidity.
• Whenever there is a sharp temperature difference between the instrument's storage and
usage environment, allow the instrument to adjust to the environment for an hour or more
before using it. Make sure to protect the instrument from the sun if the location is subject to
intense direct sunlight.
• During surveys for which the survey precision or atmospheric measurement method has
been defined, measure the atmospheric temperature and pressure separately and enter those
values rather than using the Automatic Atmospheric Correction function.
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