Operating conditions
NDRA91-92
Manual
Page 18
NADO
3.3
Appropriate use
The device is intended for the following applications:
Distance and speed measurement and output of measured data via the
interfaces RS-232, RS-422, analog output SSI or Profibus.
Use of the special measurement functions
Operating with the correct voltage
Observing
the
environmental
conditions,
operating
and
storage
temperature
Use in industrial environments complying with the
standard IP 67
(protected against splash and jet water)
Control of the data interfaces using the indicated signal levels
Measurement through optically transparent material
Measurement
through optically transparent materials such as glass,
optical filters,
acrylic glass etc. can lead to erroneous measurement
results. When
measuring through optically transparent material,
use the function
“measurement window”. By defining a fixed
measurement range
using this function, the display of an erroneous
measurement value
caused by the optical medium in front of the
laser can be avoided.
Please take care that the surface of the
medium is clean and light-
transparent.
Measuring distances < 8 m
Due to the optical system of the receiver, the device
NDRA91
with
a
divergence of 1.7 mrad receives only scattered light
at dista
nces
< 8
m. Therefore, measurement in this range is only possible onto
targets
with good reflective properties. As an alternative, an
NDRA91
with 10
mrad can be used, as this device does not imply
any restrictions for
distance measurement.