Quality Monitoring Instruments QMI MULTIPLEX User manual

EM6/MARCH 2015

QMI MULTIPLEX™
Engine Oilmist Detection System Manual
EM6/MARCH 2015
You have chosen the QMI MULTIPLEX™ Oil Mist Detection System that has been
providing a fast response without false alarms to protect lives and prevent engine
damage since the early eighties.
You can use the QMI engine condition data continuously provided by the Monitor to
see when and where repairs are needed thus avoiding unnecessary engine wear and
the resulting danger.
We can provide QMI atmospheric oil mist sensing systems to pinpoint the location
of a hazardous build-up of oil mist in confined areas such as: pumps, bow thrusters,
purifier rooms, hydraulic pack areas, test cells and rooms etc. For more information
please see our website: www.oilmist.com
© 2015 Quality Monitoring Instruments Ltd.
Errors and omissions excepted. As we strive to improve our servicend products specifications may
change or vary.
Type Approval from:
MULTIPLEX Engine Oil Mist Detection System
EM6/March 2015

Table of Contents
PART 1
INTRODUCTION
Technical Specifications Part1-2
QMI MULTIPLEX Monitor Part1-3
MULTIPLEX Central Monitor Unit (CMU) Layout Part1-4
General Wiring Layout for Engine Oil Mist Detector System Part1-5
Central Monitor Unit Part1-6
Description of (Q02L) Engine Detector Part1-6
Engine Detector Head (Q02L) Layout Part1-7
MULTIPLEX Junction Box (Q06) Layout Part1-8
QMI Fan (Q03FH) with Fan Failure Housing Part1-9
Photographs of Fan and Fan Failure Housing Part1-10
PART 2
INSTALLATION
Cut Out for QMI Panel/Wall Mounted Monitor Part2-2
Advice on Pipe Work and Detector Installation Part2-3
Detector Mounting and Location Part2-4
Layout of Pipework Part2-5
Location and Installation Details of Oil Mist Detectors for 2 Stroke Slow
Speed Engine Part2-6
Layout of Pipework Part2-7
Installation Details of Oil Mist Detectors for 2 Stroke Slow
Speed Engines Part2-8
4-Stroke Medium Speed Engine with Threaded or Rigid and
Flexible Pipes Part2-9
When Installed Inside an Engine Inspection Door or Crankcase Wall Part2-10
MULTIPLEX Monitor with Harting Connectors Part2-11
Cable Specifications Part2-12
Wiring of Socket Part2-13
Multi-core Cable Sizing Table When Less than 10 Engine Detectors
are used Part2-14
Cable Details for Engine Detector Head Six Pole Socket - Junction
Box (Q0208) Part2-15
Connector Details for QMI MULTIPLEX CMU - Junction Box (Q01H1) Part2-16
Connector Details for QMI MULTIPLEX CMU - Junction Box Part2-17
Cable Details for MULTIPLEX 4-20mA Data Logger Output (Q01H5) Part2-18
Cable Details for QMI MULTIPLEX Relay Alarm Output (Q01H3) Part2-19
Alarm Output Wiring Part2-20
Cable Details for QMI MULTIPLEX Relay Shutdown Output (Q01H2) Part2-21
Optional Engine ShutDown Wiring Part2-22
Overall View of Connector No. 4 For MULTIPLEX Mains
110/240V Power Socket Part2-23

110/240V Power Supply Wiring Part2-24
Wiring for QMI Junction Box 1 Fan, Engine Set-up Only Part2-25
Wiring for QMI Junction Box for 2 Fans Part2-26
Wiring of the Fan Failure Housing to the Junction Box PCB Part2-27
QMI MULTIPLEX 4-20mA Data Logger Output Part2-28
Wiring for Engine Slow/Shutdown Part2-29
Graphs to Show Relationship Between mg/L, Digital Readout of
Percentage of Alarm Level and the Percentage of LEL Part2-30
PART 3
STARTING UP/RUNNING PROCEDURE
Operation Part3-2
Fault Alarm Part3-3
Fan Failure Housing Light Sequence Part3-4
To Change Alarm Levels Part3-5
Test Sequence & Alarm Levels Part3-6
Changing the Number of Detector Heads Part3-7
Detector Head Test Sequence Part3-8
To Isolate a Channel Part3-8
Isolating Fan Failure Sensor Part3-9
Response to Alarm Part3-10
PART 4
FAULT FINDING
Drawing – Layout of Transistors and Fuses Part4-2
Fault Directory Part4-3
PART 5
MAINTENANCE
Replacement of Fan Failure Sensor Part5-2
Maintenance Procedures Part5-3
Lens Cleaning Procedure Part5-4
Diagram Showing Position of Lenses Part5-5
Maintenance Kit Checklist Part5-6
Suggested Maintenance Plan for Engine Detection System Part5-7
PART 6
SPARES
Codes and Description for Replacement Parts and Spares 1 Part6-2
Codes and Description for Replacement Parts and Spares 2 Part6-3
QMI Oil Mist Monitor System Log Part6-4
Returns Procedure Part6-5
QMI Request For After Sales Information Part6-6

Engine Oil Mist Detection System
MULTIPLEX
EM6/March 2015
EMAIL [email protected] WEBSITE www.oilmist.com 4 East Barnet Road, London, EN4 8RW, UK. TEL [phone]
Introduction Part1-1
PART 1
INTRODUCTION

MULTIPLEX Engine Oil Mist Detection System
EM6/March 2015
EMAIL [email protected] WEBSITE www.oilmist.com 4 East Barnet Road, London, EN4 8RW, UK. TEL [phone]
Introduction Part1-2
TECHNICAL SPECIFICATIONS
POWER SUPPLY Nominally 110 - 240 VAC 50/60 Hz
MAXIMUM POWER CONSUMPTION 100W
MAXIMUM SAMPLING CHANNELS 12
CYCLE TIME 0.5 seconds simultaneously on all channels
MEASURING SYSTEM Time multiplex analogue signal
SYSTEM OUTPUTS - RELAYS All relays fitted with maximum change
contacts voltage rating 110V@8A to 240V 5A
Main Alarm Normally energised with 1 set of change over
contacts
Early Warning Alarm Normally energised with 1 set of change over
contacts
Engine Slow Down or Shutdown Normally de-energised with 1 set of change
over contacts
Fault Alarm Normally energised with 1 set of change over
contacts
OPERATING TEMPERATURE 5-70°C
MULTIPLEX DIMENSIONS (mm) WEIGHT (kg)
Central Monitoring Unit (CMU) 403 x 312 x 128 10
Detector Head (DH) 166 x 160 x 104 2.5
Sealed Monitor is sealed to IP65
MAXIMUM DISTANCE Maximum cable length between DHs and CMU
is 100 metres. (for longer lengths contact
QMI)
FUSE ARRANGEMENTS
Internal FS1 Head Interface 1.25A anti-surge
Internal FS2 12V DC Fan Failure Supply 400mA
anti-surge
External FS3 110 - 240 VAC 3.15A anti-surge
FEATURES Continuous self-monitoring fault diagnosis.
Test facility - all functions
Engine Shutdown
OPTIONS
These items must be ordered at the time of
ordering
12 Data Logging outputs 4-20mA
Multi-way shut/slow downs for up to 12
engines
This facility can also be used for 12 individual
alarms

Engine Oil Mist Detection System
MULTIPLEX
EM6/March 2015
EMAIL [email protected] WEBSITE www.oilmist.com 4 East Barnet Road, London, EN4 8RW, UK. TEL [phone]
Introduction Part1-3
QMI MULTIPLEX MONITOR
Channel switches
Oil mist status LED and
Alarm indicator
Channel identification
Power indicator
Setting indicator LEDs
Operating instructions
Magnetic pen Testing CPU indicator Alarm setting switches Alarm level viewing switch Fuse (FS3 - Q0115) Security key switch
12345678910 11 12
!
Oil mist level reading, setting and fault location read out
Fault directory
Isolate, reset and test switches
Channel number
Channel Reading
mgm/litre
Isolate Reset Test
Testing
No CPU
Raise alarm level
Lower alarm level
OPERATING INSTRUCTIONS
To display a function, place
Magnet Pen FLAT over specified circle
Function Circle
Channel level reading (%)
Pre-set alarm level (mgm/litre)
Self-test programme
Detector alarm test
Isolate detector
Restore detector
Normal operation
Channel number
Alarm level + Channel number
Test
Alarm level + Test + Channel number
Isolate + Channel number
Isolate + Reset + Channel number
Reset
Quality Monitoring Instruments, London, NW6 2HL, UK
FAULT DIRECTORY
Channel Reading Faul t Condition Action required
1-12 F1 Cable fault Check/repair relevant cable
1-12 F2 Detector dirty Clean detector according to instructions
1-12 F3 Detector faulty Clean as F2 first or replace detector
1-12 IC Isolated Circuit Checking operating instructions
C F4 Fan Failure Check fan and fan failure detecting system
NOTE: if 'No CPU' light is on, refer to manual.
'dd' on test is dirty detector.
'cd' on test is clean detector.
Alarm level
Setting
%

MULTIPLEX Engine Oil Mist Detection System
EM6/March 2015
EMAIL [email protected] WEBSITE www.oilmist.com 4 East Barnet Road, London, EN4 8RW, UK. TEL [phone]
Introduction Part1-4

Engine Oil Mist Detection System
MULTIPLEX
EM6/March 2015
EMAIL [email protected] WEBSITE www.oilmist.com 4 East Barnet Road, London, EN4 8RW, UK. TEL [phone]
Introduction Part1-5

MULTIPLEX Engine Oil Mist Detection System
EM6/March 2015
EMAIL [email protected] WEBSITE www.oilmist.com 4 East Barnet Road, London, EN4 8RW, UK. TEL [phone]
Introduction Part1-6
CENTRAL MONITOR UNIT
The CMU contains:
1. Display panel with MP12 PCB v 3.2
2. Power Supply Board (PSB) PCB with Power Supply Unit (PSU) and connectors
3. Multi-way connectors using terminal plugs for wiring of alarms and functions, Detectors
and mains power supply
4. Fuses
5. Security switch assembly
Access to the CMU is by way of the hinged display panel sub-assembly. This is retained by 4
x M6 socket head screws. Upon removal of the screws the panel can be swung away from the
main enclosure.
The display panel sub-assembly carries the main MULTIPLEX PCB type MP12 PCB v 3.2
Processing Board, with the 10-way Binary Switch and Flash Memory Chip which is attached to
the display (Monitor faceplate) by 6 x cheese head screws.
The power supply board holds the fuses, the transistor TR1, and the terminal plugs and carries
the alarm relays.
DESCRIPTION OF (Q02L) ENGINE DETECTOR
See drawing Part 1-7
(Also used for Gearbox, Chain Case and Clutch)
The assembled Detector is made from three alloy castings comprising of:
(a) Back Plate
(b) Chamber
(c) Cover
The Back Plate is permanently fitted to the engine and has inlet and outlet ports through which
the oil mist travels via the chamber assisted by a fan. There is a stainless steel filter in the inlet
port.
The chamber and cover are a sub-assembly sealed to IP65 which are factory calibrated when
manufactured. This unit cannot be calibrated or adjusted by the user.
The chamber guides the sample past the sensors. The electronics are mounted on the back
of the chamber casing and are protected by the sealed cover. The sub-assembly is fitted to
the Back Plate by 5 x screws which can be removed if and when the Detector lens requires
cleaning.
The Detector operates using the principle of light scatter (nephelometry). The power and signals
are transmitted to and from the Monitor through a single cable sending a timed analogue signal.
All Detectors sample simultaneously and continuously every half-second.