Flowserve OR 52-7 - Manual (Page 5)

5
Explanatory Notes
Description
Scope of supply
Measuring transducer ORT 7
Measuring sensor ORG 12 with
 Solenoid valve
 Drying cartridge (fitted)
 Light emitter (supplied but not fitted)
 Spare gasket kit
The oil & turbidity detector OR 52-7 can be used:
■
On board of marine vessels for monitoring the oily water separating equipment for bilge water
according to IMO Resolution MEPC. 07 (49) as 5 ppm oil content alarm.
Function
The measuring sensor is a photometric measuring device consisting of a light source (light emitter)
and a light receiver fitted with two photosensitive elements.
The constant light beam generated in the measuring sensor passes through the transparent liquid. Any
foreign matter which is not dissolved scatters the beam, with emulsified oils scattering the light mainly
in the forward direction. The intensity of the scattered light is converted into an electric current and then
used as measure of the degree of contamination.
The
measuring transducer has the following functions:
■
Control of the measuring sensor and signal evaluation
■
Control of the purging valve
■
Limit ALARM  and ALARM 2
■
Analog actual value output 0/4 – 20 mA
■
ALARM 2 indicates a malfunction in the turbidity sensor
■
Indication of actual value / limits
■
Storage and indication of alarm, malfunction and status messages
■
Control of the bilge bypass via output ALARM 2