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.

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 Part1-7

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 Part1-8

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 Part1-9

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 Part1-10
PHOTOGRAPHS OF FAN AND FAN FAILURE HOUSING

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]
Installation Part2-1
PART 2
INSTALLATION

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]
Installation Part2-2

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]
Installation Part2-3
ADVICE ON PIPE WORK AND DETECTOR
INSTALLATION
1The Detectors are mounted upright - see drawing QMI-05-1099 Part 2-8
2Make sure the Detectors are mounted on the down side of the engine
rotation - see drawing QMI-05-1099 Part 2-8
3The Baffles must be mounted vertically so that oil does not become trapped in
the Baffle.
4
Please ensure:
-There is enough pipework outside the engine to knock out any droplets of
oil that have passed the baffle
-All pipes are either vertical or horizontal so that no oil traps are formed
-A ball valve is placed in the pipework just before the fan to control the air
flow through the Detectors
-The pipework after the fan should return to either the breather or
crankspace so the pressure is equalised. See Part 2-4 and 2-5. If the
engine has a fan in the breather pipe, we suggest you take the QMI
exhaust pipe to the breather making sure a ball valve is installed to control
the air flow through the QMI Detector - see Part 2-5
-Make sure the pipework is not under stress
5
IMPORTANT NOTES:
IT IS VERY IMPORTANT THAT NEITHER THE DETECTORS NOR THE
FANS ARE BRACKETED TO THE ENGINE
THE DETECTORS AND FANS SHOULD BE SUSPENDED ON
PIPEWORK THAT IS BRACKETED TO THE ENGINE – see schematic on
Part 2-6 and 2-7.

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]
Installation Part2-4
DETECTOR MOUNTING AND LOCATION
LOCATION OF QMI MULTIPLEX OIL MIST DETECTOR HEADS IN THE
CRANKCASE
The Detector should always be mounted on the down side of the crank rotation. If the Detector
is mounted on the up side of the crank rotation, it may cause contamination of the Head and
require more frequent cleaning.
TRUNK PISTON ENGINES
The end of the sampling pipe within the crankspace should be between the piston bearing and
the main bearing. This is the area where oil mist is most likely to be trapped. In engines that
rotate in one direction only, it is possible to place the extraction point close to the side next to
the crankspace compartment wall.
CROSSHEAD ENGINES
The normal place for the sampling pipe is in the upper area of the crankspace. This is the area
where the oil mist usually accumulates.
RETROFITS
When a QMI MULTIPLEX Oil Mist Detection System replaces another system, the same entry
points into the crankspace may be used. In this instance use an elbow after entering the
crankspace and attach a baffle to the sampling end of this elbow.
The pipe on the outside of the engine must be extended to raise the Detector to a height of
150mm to 200mm above the outlet if possible – see Part 2-8.

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]
Installation Part2-5
LAYOUT OF PIPEWORK
PIPEWORK LAYOUT
See drawing QMI-05-1098 Part 2-6
The pipework for the MULTIPLEX system should be laid in such a way that there are no low
points for condensed oil mist to collect. Failure to lay the pipes properly may cause a blockage
thus affecting the efficiency of the system.
The Fan and Detectors should be supported by the pipework and not fixed by brackets to the
engine, see QMI-05-1098 Part 2-6 and QMI-05-1099 Part 2-8.
A ball valve is normally placed in the sample extraction pipe to adjust the air flow – see Part
2-6 and 2-7.
When fitting the Detector try to ensure that there is a vertical distance of 150mm to 200mm,
if possible between the sample exit point on the engine and the ¾” BSP entry into the Detector
Head – see QMI-05-1099 Part 2-8.
The Baffle supplied will reduce heavy oil contamination of the Detector Head and give longer
periods between cleaning.
FAN SUCTION ADJUSTMENT
The valve fitted in the suction manifold, just in front of the intake of the fan, is used to control
the airflow. This is to minimise the amount of oil and oil mist passing through the Detector so
as to obtain the best results.
With the valve fully open and the engine working under full load, note each channel number
with its associated oil mist reading. Slowly close the valve until the reading drops by about five
points.
Re-open the valve slowly until the original readings return. Secure the valve in this position as
this is the setting required to achieve the best readings and reduce Detector maintenance.
The Detector Heads must at all times be fitted vertically to prevent oil mist condensate from
blocking the internal labyrinth (see drawing QMI-05-1099 Part 2-8).

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]
Installation Part2-6