MICRO-EPSILON optoNCDT 1750, Руководство по эксплуатации

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Protective Housing
optoNCDT 1750
10. Protective Housing
The protective housing are designed to be used especially if the sensor operates in diffuse reflection mode
and in a dirty environment or higher ambient temperature. It is available as an accessory. If these protec-
tive housings are used, the linearity of the sensors in the complete system may deteriorate. For the sole
purpose of protection against mechanical damage a simple protective shield with sufficiently large opening
is therefore more advantageous. Installation of the sensors in the protective housings should be performed
by the manufacturer, because especially in case of short reference distances the protective window must be
included in the calibration.
10.1 Versions
- SGH size S, M: without air purging (with inlet and exhaust for cooling) and
- SGHF size S, M: with air purging.
10.2 Guidelines
- The maximum ambient temperature within the protective housing is 45 °C.
- The requirements for compressed-air are:
ƒ
Temperature at the inlet < 25 °C
ƒ The compressed-air must be free of oil and water residues. It is recommended to use two oil separators
in series arrangement.
- With a flow rate for example 240 l/min (2.5E+5 Pa or 36.2 psi) the maximum outside temperature is 65 °C.
- For higher ambient temperatures it is recommended to use an additional water-cooled carrier and cover
plates outside the protective housing.
- No direct heat radiation (including sunlight!) on the protective housing. In case of direct heat radiation ad-
ditional thermal protective shields must be installed.
- It is recommended that the protective window is cleaned from time to time with a soft alcohol-soaked cloth
or cotton pad.
10.3 Delivery
The rotatable plug-nipple glands type LCKN-1/8-PK-6 (FESTO) for the compressed-air tubes with a inner
diameter of 6 mm, the air plate (SGHF) and the sensor fastening accessories are included in the delivery of
the protective housing.