User Manual EE360
Moisture in Oil Sensor | 4
1.2 Safety Instructions
1.2.1. General Safety Instructions
NOTICE
Improper handling of the device may result in its damage.
▪
Avoid any unnecessary mechanical stress and inappropriate use.
▪
When replacing the filter cap make sure not to touch the sensing elements.
▪
For sensor cleaning and filter cap replacement please see “Cleaning instructions” at
.
▪
Installation, electrical connection, maintenance and commissioning shall be performed by qualified
personnel only.
▪
The devices are designed for the operation with class III supply (EU) and class 2 supply (NA).
▪
The power supply must be switched off before opening the housing.
▪
An existing Ethernet connection must be disconnected before opening the housing.
1.2.2. Intended Use
EE360 is optimized for reliable measurement in lubrication, hydraulic and insulation oils as well as diesel fuel.
In addition to highly accurate measurement of water activity (a
w
) and temperature (T), EE360 calculates the
absolute water content (x) in ppm. The probe can be used up to 180 °C (356 °F), 20 bar (290 psi) and is available
with either ISO or NPT sliding fitting, which allows for variable immersion depth. Using the optional ball valve, the
probe can be mounted or removed even without process interruption.
WARNING
The manufacturer cannot be held responsible for damages as a result of incorrect handling, installation and
maintenance of the device.
▪
This device is not appropriate for safety, emergency stop or other critical applications where device
malfunction or failure could cause injury to human beings.
▪
The device may not be manipulated with tools other than specifically described in this manual.
NOTICE
Failing to follow the instructions in this user manual may lead to measurement inaccuracy and device
failures.
▪
The EE360 may only be operated under the conditions described in this user manual and within the
specification included in chapter 9 Technical Data.
▪
Unauthorized product modification leads to loss of all warranty claims. Modification may be accomplished
only with an explicit permission of E+E Elektronik Ges.m.b.H.!
The moisture in oil can be expressed in absolute or relative terms:
▪
The
water activity a
w
is the relative measure for moisture in oil. It represents the ratio between the actual
amount of dissolved water and the maximum possible amount of dissolved water in the oil at a certain
temperature T. Independently of the oil type, the water activity shows how close to saturation is the oil at a
certain temperature.
a
w
= 0 indicates completely dry oil
a
w
= 1 fully saturated oil
EE360 measures directly the water activity.
▪
The
water content x
is an absolute measure equal to the share of water (dissolved, emulsified or separate) in
the oil. The water content is measured in ppm (parts per million) and is independent from the oil temperature.
For assessing how far is the oil from saturation, x must be regarded together with T.
EE360 calculates x out of the measured a
w
and T values. The calculation is oil dependent and requires a set of
oil specific parameters. (Contact an E+E representative for details.)
