4
Function
The oil detector & alarm ORGS 112 is an equipment unit consisting of the measuring electrode
ORGS 11-1 and a measuring pot.
The measuring electrode ORGS 11-1 is a compact-type system that comprises the measuring
electrode and an electronic module integrated in the terminal box. The electrode operation is based on
the conductive measuring principle using the electrical conductivity of the water for signalling water
level. The electronic module detects whether the electrode rods are submerged or exposed and, in the
event of ingress of oil, deactivates the output contacts.
A water sample, taken from the cooling water system downstream of the location at the highest point
where ingress of oil might occur, is fed from below into the measuring pot of the ORGS 11-2. If the
water is contaminated with oil, the oil droplets - due to their lower density - ascend and accumulate on
top of the water and, consequently, the electrode rods are now submerged in this oil film.
Oil is not electrically conductive, which means that no current can flow between the electrode rods of
the measuring electrode. In this case the oil detector & alarm will signal ingress of oil and trigger an
alarm.
The amount of oil necessary to signal ingress of oil depends on the design of the measuring pot and
the length of the electrode rods. The measuring pot is matched to the electrode such that ingress of oil
is signalled when the oil content limit of approx. 50 ml is reached.
The equipment can detect all substances that are insoluble in water, not emulsified and lighter than
water. In addition, the equipment can also detect all liquids with a conductivity value below the
adjusted response sensitivity.
Important notes
Usage for the intended purpose
Use oil detector & alarm ORGS 11-2 only for signalling ingress of oil in cooling water systems.
Safety note
Danger
When loosening the measuring electrodes hot cooling water may escape.
This presents the risk of severe scalding all over the body!
Do not remove the measuring electrode ORGS 11-1 unless the boiler pressure is verified
to be zero.
The terminal strip of the measuring electrode ORGS 11-1 is live during operation!
This presents the danger of electric shock!
Cut off power supply before mounting or removing the housing cover!
The equipment must only be installed and commissioned by qualified and competent staff.
Retrofitting and maintenance work must only be performed by qualified staff who - through adequate
training - have achieved a recognised level of competence.
Attention
The name plate specifies the technical features of the equipment. Do not commission or
operate any item of equipment that does not bear its specific name plate.
