Description; Technical Data; Safety Precautions; Basic Information Concerning Safety - Hilti PRA 20 Manual De Instrucciones

These numbers refer to the correspon-
ding illustrations. The illustrations can be
found on the fold-out cover pages. Keep
these pages open when studying the ope-
rating instructions. In these operating
instructions, the PRA 20 laser detector is
referred to as "the tool".

2. Description

2.1 PRA 20 laser detector
The Hilti PRA 20 is designed to detect the
laser beam emitted by the PR 20 rotating
laser.
2.2 Features
The detector can be employed as a hand-
held tool or may be mounted on the mea-
suring staff, telescopic staff or on other
leveling staffs, wooden battens or frames
etc. when the appropriate holder is used.
Items supplied
1 PRA 20 laser detector
1 PRA 20 operating instructions
2 batteries (size AA cells)

3. Technical data

Range (diameter)
2 to 400m (6 to 1300 ft)
Laser plane detection tolerance (at 10m)
Fine: ± 0.5 mm (0.02 inch)
Standard: ± 1.0 mm (0.04 inch)
Audible signal
2 volume levels or silent operation
Liquid crystal display
On both sides
Detection window
80 mm (2 3/4 inches)
8
Printed: 07.07.2013 | Doc-Nr: PUB / 5070244 / 000 / 00
2. Description / 3. Technical data / 4. Safety precautions
Center indicator, from top edge of hou-
sing
50 mm ( 2 inches)
Marking notches
On both sides
Automatic cut-out
The detector switches itself off after
30 min. when no laser beam is
detected.
Dimensions
165x67x24mm (6.5"x2.6"x0.9" inches)
Weight
0.2 kg (0.4 lbs) including batteries
Power supply
2 x size AA batteries
Battery life at 20°C [+68°]
Alkaline batteries: > approx. 50 hours
Operating temperature
-20° to +50°C
(-4° to +122°F)
Storage temperature
-30° to +60°C
(-22° to +140°F)
Protection class
IP 56 (as per IEC 529)
Mounting thread on detector
M5 x 10 mm (0.4 inch)

4. Safety precautions

4.1 Basic information concerning safety

In addition to the information relevant to
safety given in each of the sections of
these operating instructions, the following
points must be strictly observed at all
times.