MSSC GDMS-OMD14 User manual
GDMS-OMD14®
Part No.: 2 914 00 0000
Release: 160623
(revision 160704)
Marschallstraße 4 • 66606 St. Wendel • Germany
Tel. +49 6851 9127970
eMail: [email protected] • Web: www.mss-hx.com
MSS AG
Declaration of Conformity
We
Marschallstraße 4
66606 St. Wendel
Germany
Tel.: +49 6851 9127970
declare on our own responsibility, that the products
Kind of equipment:
Type - designations:
are in compliance with following norms:
66606 St. Wendel, Germany, 2016 June 23
!
`
!
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It is recommended to read this manual before commencing the repair, assembly
or commissioning of the oil mist detector system!
The manufacturer’s warranty will become void if these instructions are
not followed!
Unless notied, these operation instructions are applicable for:
GDMS-OMD14
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1. System Description....................................................................... 1.1
2. Installation .................................................................................... 2.1
3. Commissioning ............................................................................. 3.1
4. Performance / Maintenance Tests ................................................ 4.1
5. Troubleshooting ............................................................................ 5.1
6. Repair ........................................................................................... 6.1
7. Notes ............................................................................................ 7.1
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1. System Description....................................................................... 1.1
1.1. Components .............................................................................................1.1
1.1.1. GDMS-OMD14 Principle ...................................................................1.1
1.1.2. GDMS-OMD14 - Delivered Items .....................................................1.4
1.1.3. GDMS-OMD14 - System Components .............................................1.5
1.1.3.1. GDMS-OMD14 Evaluator ..........................................................1.5
1.1.3.2. Connectors and pin-out of the GDMS-OMD14 Evaluator ..........1.8
1.1.3.3. GDMS-OMD14 Sensor and SOPS ............................................1.9
1.1.3.4. Technical Data of GDMS-OMD14 Sensor and Evaluator ........1.11
1.1.4. Intended Purpose ............................................................................1.13
1.1.5. Materials Included ...........................................................................1.14
2. Installation .................................................................................... 2.1
2.1. General ....................................................................................................2.1
2.2. Installation Position ..................................................................................2.2
2.3. Wiring Diagram ........................................................................................2.3
3. Commissioning ............................................................................. 3.1
3.1. Pre-Commissioning Checks .....................................................................3.1
3.2. Data Sampling ..........................................................................................3.1
3.3. Alarm Setting and Triggering ....................................................................3.1
3.3.1. Alarm Resetting .................................................................................3.2
3.4. Settings & Parameters / Using the Evaluator ...........................................3.3
3.4.1. Basic Usage of the Evaluator ............................................................3.3
3.4.2. How to change a value .....................................................................3.4
3.4.3. Menu Screen Overview .....................................................................3.7
4. Performance / Maintenance Tests ................................................ 4.1
4.1. Function Test ............................................................................................4.1
5. Troubleshooting ............................................................................ 5.1
5.1. Failure in GDMS-OMD14 Sensors ...........................................................5.1
5.2. Communication Failure ............................................................................5.3
5.3. Evaluator Failure ......................................................................................5.4
5.4. EEprom Parameters Failure .....................................................................5.4
6. Repair ........................................................................................... 6.1
7. Notes ............................................................................................ 7.1
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Page 1.1
The is an advanced
oil mist detection system especially
constructed to meet the requirements
of large diesel and gas engines, like
ship engines or power plant engines.
While developing GDMS-OMD14
MSS AG has used the latest technical
knowledge and practical experience.
The issue of highly ignitable oil mist
produced when lubricants or fuel come
in contact with hot surfaces within the
engine has become one of the most
signicant risks for engine builders
and operators. Mist concentration of
50 mg/l and higher is sufcient for an
explosion to occur, resulting in large-
scaled engine damages and in severe
cases in the loss of lives. The presence
of oil mist inside the engine can also
indicate a damage of sliding surfaces,
because the lubricant lm can vapour in
areas where moving parts begin to rub against each other.
The main topics of oil mist detection are:
1. Prevention of larger damages in engines. If the oil mist is detected early, minimal
maintenance and repair works are often sufcient to solve the problem, allowing
to avoid high repair- and breakdown costs for the engine.
2. Protection of the engine against explosion. Before the concentration of oil mist
reaches the LEL, Lower Explosion Level (50 mg/l), the oil mist detector will trigger
an alarm.
GDMS-OMD14 is also capable of detecting water vapour. Due to water vapour,
corrosion on major parts inside the engine may occur which will damage the engine.
Oil mist detection systems are also part of rules applied world-wide which are
administered by the IACS, the International Association of Classication Society.
These rules are called UR, Unied Requirements, and oil mist detection systems
are part of UR M10 and UR M67. These Unied Requirements are realized and
used in the national rules of the Classication Societies, like the German Lloyd.
1 Evaluator
for up to 16
Sensors
1 - 16
Sensors
Inside the
engine
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Based on a widely-used principle of light measurement, GDMS-OMD14 does not
have the disadvantages of some older OMD systems. The GDMS-OMD14 is a pipe-
free system, with sensors mounted directly at the engine wall, it allows quick and
exact measurement of oil mist concentration in each engine compartment. A local
control device, the GDMS-OMD14 Evaluator, processes and displays measurement
data received from the sensors. The data can also be monitored on a computer
using the interfaces of the Evaluator.
The light measurement can be performed in two different ways:
1. : Light emitted by a light source (LED) passes through the
measuring section and is measured by a semi-conductor receiver diode. The
wave length of the light can be between 600nm and 960nm. Oil mist reects
and refracts light, therefore lowering the intensity that can be detected by the
receiver. The concentration of oil mist in the measuring section correlates
to the intensity of light detected by the receiver. This measuring principle is
employed by GDMS-OMD14.
2. : Light of a LED is emitted into a measuring section and the
light reecting on the mist is measured via an optical semi-conductor. The
extent of the oil mist concentration in the measuring section correlates to the
reection on the mist.
The GDMS-OMD14 Evaluator as well as the optional PC monitoring software have
a warning system which allows to raise an alarm when the measured data indicates
high oil mist concentration in the engine.
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1. The oil mist is measured inside the engine where it develops. Therefore, the
response time from the development of oil mist until the system raises an
alarm is very short.
2. The measured data is displayed on the Evaluator which can be mounted
near the engine or at any other place. The measured data can also be shown
on a Remote Monitoring Unit and/or a PC. This eliminates the risk of being
near the faulty engine.
3. If one of the sensors gets dirty, the operator will be alerted immediately. The
sensor can be cleaned easily without stopping the engine.
4. Easy handling.
5. Immediate localization and indication of the compartment where the oil mist
developed.
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Main components of GDMS-OMD14 system:
1. Evaluator
2. 1....16 sensors
3. 1....16 SOPS
4. Cables sensor - sensor
5. Cables sensor - Evaluator
6. Cables for power supply
Redundant
Serial Ring Bus
Connecting up to
16 OMD14 sensors
24V DC
GDMS-OMD14 Evaluator
PC / display / printer
Logger software
(optional)
Local Alarm System
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The Evaluator consists of a metallic case, a liquid crystal display (LCD), three LEDs
(Alarm 1, Alarm 2 and Ready), four control keys ( Esc , , , ) and
one reset button Reset .
The electronics and the display of the GDMS-OMD14 Evaluator are installed in a
closed, shock-proofed, water, dust and EMC resistant aluminium case, protection
class IP 67.
The Evaluator can be mounted close to the engine or in the engine control room.
The Evaluator operates reliably at temperatures between 0°C to 70°C and at relative
humidity up to 80%.
The installation of the Evaluator is performed via 2 assembly rigs. If required, the
Evaluator can be mounted vibration-free. In either case the connecting cable must
be relaxed (e.g. using a loop) without putting any strain on the connectors / plugs.
The Evaluator displays the measurement values and OMD14 parameter values on
its LCD display. It also provides test procedures that can be executed for GDMS-
OMD14 diagnostics.
The control keys of the Evaluator are implemented as membrane buttons. This type
of buttons must not be operated using sharp items, including knifes, screw-drivers
or ball-pens.
If necessary, the keypad can be wiped with a mild cleaning agent. Never use
solvents!
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Page 1.6
After successful installation and testing by service technicians approved by MSS
AG, the settings of the Evaluator should not be changed. The Evaluator does not
require regular maintenance.
Note: Firmware updates for the Evaluator will be available and may be applied to
your system only by service technicians approved by MSS AG. Firmware
updates are generally not free of charge. Please contact MSS AG or an
authorized representative for pricing and further information.
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Connectors of the Evaluator
12345
Pin Power
Supply Relays Serial Data
Link
OMD14
OUT
OMD14
IN
1 +24V
REL1-A
Alarm 1
Relay NC
RS232
OUT +24V +24V
2 0V
REL1-B
Alarm 1
Relay NO
RS232
IN 0V 0V
3
REL1-C
Alarm 1
Relay COM
RS485
OUT-
OMG14
IN - 3
OMD14
OUT - 3
4
REL2-A
Ready
Relay NO
RS485
OUT+
OMD14
IN - 4
OMD14
OUT - 4
5
REL2-B
Ready
Relay COM
RS485
IN-
OMD14
IN - 5
OMD14
OUT - 5
6
REL3-A
Alarm 2
Relay NO
RS485
OUT-
OMD14
IN - 6
OMD14
OUT - 6
7
REL3-B
Alarm 2
Relay COM
GND GND GND
Cable
Part No.
Connec-
tor Part
No.
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Page 1.9
GDMS-OMD14 performs compartment specic oil mist
monitoring and lubrication oil temperature measurements.
The measuring unit of GDMS-OMD14 for a compartment
consists of a nger-shaped optical sensor with system
redundancy, and a multiple chamber Splash Oil Protection
System (SOPS) which prevents the sensor from being
soiled with splash oil, but allows the oil mist and water
vapour to enter the sensor light beam within milliseconds.
So, the reaction time of each sensor and the whole system
is less than one second.
The SOPS is mounted from the inner side of the engine wall
into already existing drilling of the crankcase. The sensor
is pushed into the installed SOPS from the outside of the
engine. So, the OMD14 sensor installation is very simple.
This also means that
The GDMS-OMD14 sensors are interconnected via two
redundant serial bus interfaces. If necessary, a sensor
can be easily dismounted, for example for cleaning,
while the engine is running without affecting the system’s
functionality.
GDMS-OMD14 does not have any movable mechanical parts and hence does not
undergo any wear and tear.
!
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The sensor and alarm system’s reaction time is in the range of less than one second.
The SOPS and the sensors are identically for each engine. Due to differences in
each engine design which result in different wall thicknesses different SOPS and
sensor lengths are required. The needed length will be determined by personell of
MSS AG or an authorized partner.
If the SOPS and the sensor are installed near or in a section with a high splash
oil concentration the usage of the Diffusor add-on is required (also refer to “2.2.
Installation Position” on page 2.2).
The GDMS-OMD14 consists of an appropriate component (electronic system) and
an intrinsically safe component (Sensor). These components build a mechanical
unit.
The GDMS-OMD14 is mounted to the engine wall, separating the crank case with
its Ex-category 2G requirements, from the non explosive engine room.
The cylindrical Aluminium housing containing the electronic system is an assembly
of circuit boards and electronic components.
Two plug connectors for connection of the non intrinsically safe electric circuits
(current supply and RS 485 interface) and the electronic system of a further Sensor
are mounted to the cylinder barrel of the cylindrical housing.
The cylindrically shaped high-grade steel housing of the sensor consists of an
optical system and a temperature sensor. The electronic components, except the
optical measuring section, are embedded in explosion proof pottant.
The housing of the sensor and the electronic system are connected to each other
by a threaded pipe. The multi-core connecting cable of the intrinsically safe electric
circuits of the sensor is led through the threaded pipe and connected to the circuit
board of the electronic system.
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Power Supply: 24V DC +30/-25% (18 - 31V DC)
Operating Current:
max. 1.5 A
Up to 16 (sixteen) GDMS-OMD14 Sensors can be connected.
!
If the supply voltage is below 18V DC or higher than 31V DC no
guarantee can be given that the system is working properly.
A stable and constant power supply in the range of 18-31V DC
must be ensured by the end user.
Sensitivity: Adjustable in 10 steps from 0,2mg/dm3 to 10 mg/dm3 (LEL 50
mg/dm3 refer Chapter 1.)
Sensitivity Level 1 2 3 4 5 6 7 8 9 10
Sensitivity mg/l 0.2 0.3 0.5 0.7 1.0 1.5 2.5 4.0 7.0 10.0
Relay-Outputs: Contact load for all relays:
max. 60V AC, 1A, 60VA / max. 60V DC, 1A, 60W
Alarm 1:
1 relay with 2 ground-free switch-over contacts, usually
congured as main alarm
Alarm 2:
1 relay normally closed, usually congured to open if
prealarm condition arises
Ready:
1 relay, closes if system is fault-free, opens otherwise
Wire break protection with 33 kOhm resistors (standard)
Interface: Serial Interface:
• RS485 for standardized industrial, bidirectional
communication
• RS232 for setup and conguration
Communication Protocol:
• Modbus (optional)
• Canbus (optional)
User interface: LCD Display 128x64 dots
1 LED green “Ready”
1 LED red “Alarm 1” (usually set up as main alarm)
1 LED orange “Alarm 2” (usually set up as pre-alarm)
Environment
Conditions:
Ambient temperature in service:
0°C - 70°C for GDMS-OMD14 Evaluator
0°C - 85°C for GDMS-OMD14 Sensor Electronics
-10°C - 120°C for GDMS-OMD14 Sensor Measuring Section
Ambient temperature for storage:
-25°C - 85°C
Protection:
IP65
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Page 1.12
for non intrinsically safe electric circuits
rated voltage for power supply DC 24V, Um = DC 30V
rated voltage for RS 485 interface DC 24V, Um = DC 30V
optical radiation
wavelength 880 nm
optical power of LED P0<12 mW
radiant intensity of LED <0,6 mW/mm2
Environment Conditions 0°C < Ta <+85°C
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