Nikon NPL-632, Инструкция по эксплуатации

Страница: 33 / 206

Field Station NPL-632 Instruction Manual 19
Preparation 2
•
Do not use a prism with scratches, a dirty surface, or a chipped center.
Prisms with thin edges are recommended.
•
When using a reflector sheet, take measurements longer than 5 meters.
•
When using a mini or standard prism, take measurements longer than
10 meters.
•
When measuring a short distance, incline the prism slightly so that the EDM
can ignore unnecessary reflections on the prism surface, as shown below.
Measurement in Reflectorless mode
The intensity of the reflection from the target determines the distance the NPL-632
can measure in this mode. The color and condition of the target surface also affect the
measurable distance, even if the targeted objects are the same. Some less-reflective
targets may not be measured.
The following table describes some examples of targets and approximate measurable
distances.
Measurable distances may be shorter or measurement intervals may be longer in the
following cases:
Hold the prism securely in place and do not move while taking measurements.
In Prism mode, in order to avoid false measurements on objects other than the prism or reflector-sheet, targets
that are less reflective than the prism or reflector sheet are not measured. Even if you start a measurement,
measured values are not displayed. To measure less reflective objects, use the N-prism (reflectorless) mode.
Target You can measure approximately...
Traffic signs, reflectors 500 meters (1640 feet)
Paper (white), veneer (new) 210 meters (700 feet)
Wall (brightly painted), brick 50 to 100 meters (160 to 330 feet)
thin edges
chipped center thick edges
✓
✕
✕
Not completely square to
the sighting axis Completely square to
the sighting axis
✕
✓