Det-Tronics SW9200x Slickwatch IR Oil Detection System - Manual (Page 2)

Section 1
General Information
The installation, operation and maintenance instructions
contained in this manual are for use by qualified person-
nel only. All personnel assigned to this equipment
should read the instructions provided before initiating
any procedures. The manual should be maintained on
file so that it is available to installation, operation and
maintenance personnel. To avoid injury to personnel or
damage to the equipment, do not perform any proce-
dures other than those described in this manual unless
instructed by the factory or qualified by training.
GENERAL DESCRIPTION
The SlickWatch oil slick detector is a remote electro-opti-
cal instrument designed to detect oil films floating on
water surfaces. Oil detection is based on changes in
infrared reflectance that occur when an oil film is present
on the water.
These changes are detected by measuring the water
surface reflectance at two points in the infrared spectral
region near 3 microns. In this region, sharp changes in
reflectance due to absorption bands are observed.
Water surface reflectance dips from approximately 2% at
2 microns to a valley of 0.75% at 2.7 microns and then
rises sharply to a peak of 4.7% at 3.07 microns before
returning to approximately 2% at 4 microns.
The reflectance spectrum of oil films differs from that of
water surfaces in an unambiguous manner when viewed
in the 3 micron region. Oil films do not exhibit the deep
valley and adjacent sharp peak at approximately 2.7 and
3.1 microns. When a ratio is computed using
reflectance readings at the peak and valley points, water
surfaces exhibit a low reflectance ratio while oil films
show a much higher reading.
The SlickWatch system consists of a transmitter and a
receiver which are mounted above the water surface to
be monitored. The transmitter projects a light beam to
the water surface and the reflected infrared light is ana-
lyzed by the receiver. An alarm relay is activated when
an oil film is detected.
FEATURES
• Non-contact design – instrument never comes in con-
tact with contaminants being monitored.
• Reliable, continuous monitoring day and night.
• Low maintenance.
• Modular design for easy service.
• Internal Fault alarm.
• Rugged, explosion-proof construction.
• CSA certified.
SPECIFICATIONS
HOUSING SIZE—
Transmitter and receiver dimensions are: 12-l/4 inches
(W) x 11-1/2 inches (H) x 9-1/2 inches (D).
WEIGHT—
Transmitter: 34 lbs. (15.4 kg).
Receiver: 39 lbs. (17.7 kg).
©
Detector Electronics Corporation 1994 11/94 95-8409-01
INSTRUCTIONS
SlickWatch™
Oil Slick Detection System
SW9200
DET
-
TRONICS ®