KEYENCE LB-1000(W) - Manual (Page 16)

16
HINTS ON CORRECT USE
Compatibility
The controller and sensor head of the LB-1000 series have been factory-
calibrated in pairs. Therefore, in order to satisfy specifications, be sure to
use a sensor head and controller having the same serial number.
Interference prevention
• Isolate the power cable and connecting cable(s) of the sensor from
high-tension lines or power lines; otherwise the sensor may malfunc-
tion or the laser diode may deteriorate or be broken due to noise
interference.
• The sensor head is case-grounded. If noise occurs at the mounting
position of the sensor head, install insulation between the mounting
position and sensor head.
• To prevent radiation noise interference, cover the sensor head with a
metal casing. (Be sure that noise does not enter at the mounting
position of the casing.)
• To prevent radiation noise and inductive noise interference, shield the
cables with metal or use independent metal conduits.
• To avoid a malfunction due to excessive noise interference, be sure to
correctly ground the earth ground terminal.
Operating environment
• Always keep the sensor head free from light-refracting substances
such as water or oil.
• Make sure that extraneous light does not fall on the lenses of the
sensor head.
• When extremely high measurement accuracy is required, install a
cover over the sensor head to prevent light from entering.
• When no target is present, the effect of extraneous light on the sensor
can be ignored by using timing input.
AUTO ZERO function lock (DIP switch 4 )
• When DIP switch 4 is set to LOCK (bottom setting), the AUTO ZERO
key on the front panel does not function. Note that when the switch is
set to FREE, the AUTO ZERO function operates but the SHIFT
adjustment trimmers cannot be used to adjust output.
• When AUTO ZERO is used with the DIP switch set to FREE and then
the switch is switched to LOCK, the AUTO ZERO setting becomes
invalid, and the AUTO ZERO function is disabled.
• After switching between FREE and LOCK, turn the power supply OFF
once and then ON again to ensure that the monitor voltage will be
normally output.
Sensor head orientation
When a target consists of differently colored portions or different
materials separated by a border, measurement error may result
depending on the orientation of the sensor head. To minimize measure-
ment deviation, install the sensor head parallel to the border line as
shown in the illustration below.
Operating illumination
Although the operating illumination is specified to 2,500 lux max., (LB-
301: 4000 lux max.) if possible avoid using the sensor near lighting
equipment that emits light in recurring pulses. If the sensor must be
positioned near such equipment, minimize the effect by using a light
shielding plate.
Incorrect Correct
CAUTION
CAUTION
Note
Note
CAUTION