E+E Elektronik EE381 User manual
Moisture in Oil Sensor
BA_EE381 // v05 / Modication rights reserved // 193021
User Manual
EE381
TABLE OF CONTENTS
1. General 5
1.1 Explanation of Symbols 5
1.2 Safety Instructions 6
1.3 Environmental Aspects 6
2. Product Description 6
2.1 General 6
2.2 Dimensions 7
3. Installation 8
3.1 Installation Location 8
3.2 Installing the Probe directly into the Process 8
4. Electrical Connection 9
5. Operating Components 10
5.1 Circuit Board 10
5.2 Status LEDs 11
5.3 Display Module (Option) 11
6. Maintenance 12
6.1 Cleaning the Sensing Head / Filter Replacement 12
6.2 Self-diagnosis and Error Messages 12
6.3 Replacement Parts / Accessories 13
7. Technical Data 14
USA / FCC notice:
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reaso-
nable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in
accordance with the installation manual, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment o and on, the user is encouraged
to try to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna. - Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit dierent from that to which the receiver is connected. - Consult the dealer or an experienced radio/TV technician for help.
Caution: Any changes or modications not expressly approved by the party responsible for compliance could void the user‘s authority to operate this device.
CANADIAN / ICES-003 notication: This Device B digital apparatus complies with Canadian ICES-003.
User Manual EE381
Page 5
1. General
This manual is a part of the scope of supply and to warrant proper handling and optimal performance of the instrument it should be read
before start-up.
In addition, the manual is for everyone who requires knowledge about transport, setup, operation, maintenance and repair.
The manual should not be used without written consent from E+E Elektronik® for the purpose of competition or forwarded to third parties.
Copies for personal use are permitted.
All information, technical data and illustrations contained in these instructions are based on information available at the time of publication.
1.1 Explanation of Symbols
This symbol indicates a safety instruction.
These safety instructions should always be followed carefully. By not following these instructions injuries of persons or material
damage could happen. Therefore E+E Elektronik® does not accept liability.
This symbol indicates a note.
These notes should be followed to achieve optimum functioning of the equipment.
!
i
User Manual EE381
Page 6
1.2 Safety Instructions
!
General Safety Instructions
• Excessive mechanical loads and incorrect usage should always be avoided.
• Take care when unscrewing the lter cap as the sensor element could be damaged.
• The sensing element is an Electro Static Discharge sensitive component (ESD). When touching the sensing element, ESD protective
measures should be followed.
• Grip sensing element at the lead wires only.
• Installation, electrical connection, maintenance and commissioning should be performed by qualied personnel only.
1.3 Environmental Aspects
Products from E+E Elektronik® are developed considering all important environmental issues. While disposing of the product
environmental pollution should be avoided. To dispose of the sensor the individual components should be sorted with care.
The housing consists of metal ( die-cast aluminium, AlSi9Cu3). The electronic parts should be collected as electronic scrap and disposed of
according to the regulations in force.
2. Product Description
2.1 General
E+E EE381 Series is specially designed for the measurement of water content in oil. EE381 is ideal for online monitoring of moisture in
lubrication or insulation oil, which is very important for the long-term performance and preventive maintenance of plants and machinery.
User Manual EE381
Page 7
Humidity measurement in oil
Similar to the humidity in the air, the water content in oil can be indicated by the absolute value in ppm or by the relative value aw:
- ppm (mass of water / mass of oil)
- aw (actual water content as fraction of the water content in saturated oil)
aw = 0 corresponds to water-free oil, while aw = 1 indicates saturated oil. aw measurement with the EE381 sensor is based on the
outstanding long term stability and resistance to pollution of the E+E HMC capacitive sensing elements series.
The sensor has two freely selectable and scaleable outputs for water activity, temperature or water content in ppm.
The optional conguration software allows exible and easy adjustment of the analogue outputs to the respective
requirements. The sensor adjustment / calibration can easily be performed.
An optional display for on-site monitoring of the measuring values allows for a quick overview of the prevailing conditions in the process.
2.2 Dimensions
Values are given im mm (inch)
48 (1.9)
100 (4)
28 (1.1)
54 (2.1)
32
(1.3)
75 (3)
40 (1.6)
24 (1)
Ø12 (0.5)
spanner width:
27 or 24
G 1/2" ISO or
1/2" NPT
User Manual EE381
Page 8
3. Installation
3.1 Installation Location
Select a location that oers optimum measuring conditions. The oil must be able to circulate freely around the sensing element.
Mount the sensor directly into the circulating system and not into a reservoir.
3.2 Installing the Probe directly into the Process
When installing a probe directly into the process, there should be a stop valve on both sides of the point of installation.
This makes it easy to remove the sensor for maintenance and calibration.
Step 1:
Install the probe with the stop valves closed.
It is not permitted to use a sealing ring with a NPT 1/2" thread.
Appropriate PTFE sealing tape or sealant should be used instead.
Step 2:
Insert the probe into the process and screw it as tight as possible by hand.
Step 3:
If there is a sealing ring, check it for correct centring and tighten the
screw connection with a torque of 30 Nm.
User Manual EE381
Page 9
4. Electrical Connection
Analogue output:
1
7
6
52
3
4
1 V+
2 GND
3 GND
4 OUT1
5 OUT2
6 NC
7 NC
V
mA
V
mA
10...30V DC
1
7
6
52
3
4
1 V+
2 GND
3 NC11
4 NC12
5 NC21
6 NC22
7 not connected
10...30V DC
User Manual EE381
Page 10
5. Operating Components
5.1 Circuit Board
After removal of the housing cover, the following operating components on the circuit board may be accessed to congure the sensor to
the desired settings:
1. Serial interface: Pin connector for serial interface cable (HA010604).
2. Status LEDs: Provide information about the status of the device. Refer to chapter “5.2 Status LEDs”.
3. Current-/ voltage output: If the sensor is switched from current to voltage output, using the conguration software, the 2 jumpers
must be positioned accordingly:
for current signals: for voltage signals:
4. Diagnostic LED: Visual indication for easy determination of the cause of error. (refer to chapter “6.2 Self-diagnosis and
Error Messages”).
5. Display: These pin connectors are designated for the display module.
I
U
I
U
I
U
I
U
5. Display
2. Status LEDs
3. Current / voltage output
1. Serial interface
4. Diagnostic LED
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