QMI MULTIPLEX Series Manual

MULTIPLEX™

Oil Mist Detection System

Manual

ATMOSPHERIC SENSOR

AM8/JANUARY 2015

Atmospheric Oil Mist Detection System

MULTIPLEX

QMI MULTIPLEX™

Atmospheric Oil Mist Detection System Manual

AM8/JANUARY 2015

You have chosen the QMI MULTIPLEX™ Atmospheric Oil Mist Detection System to
locate hazardous levels of oil mist in confined areas such as: engine rooms, pump
rooms, bow thrusters, purifier rooms, hydraulic pack areas, and test cells.

We can provide the smaller QMI TRIPLEX™ Atmospheric Oil Mist Detection Systems for
spaces that require up to three Sensors.

The QMI MULTIPLEX™ Oil Mist Detection Systems have been providing a fast response
without false alarms to protect lives and prevent fires since the early eighties. Our Engine
Oil Mist Detection Systems provide engine condition data to continuously monitor when
and where repairs are needed thus avoiding unnecessary engine wear and the resulting
danger.

This system is designed to measure oil mist between 3 and 10 microns.

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 service and products specifications may
change or vary.

AM8/JANUARY 2015

Table of Contents

PART 1
INTRODUCTION

Technical Specifications Part1-2
QMI MULTIPLEX Monitor Part1-3
MULTIPLEX Central Monitor Unit (CMU) Layout Part1-4
Description of Central Monitoring Unit (CMU) Part1-5
Description of Sensor (Q10) Part1-7
Photograph of Sensor (Q10) Part1-8
Drawing of Atmopheric Sensor Part1-9

PART 2
INSTALLATION

General Wiring Layout for MULTIPLEX Atmospheric System Part2-2
Cut out for QMI Panel/Wall Mounted Monitor Part2-3
Positioning and Location of Sensors Part2-4
Positioning of QMI Atmospheric Sensor (Q10) Part2-5
Schematic of Positioning of Sensor and Best Practice Part2-7
Monitor with Harting Connectors Part2-9
Cable Specifications Part2-10
Wiring Description Part2-11
Wiring of Socket Part2-12
Multi-core Cable Sizing Table When Less than 10 Atmospheric
Sensors are used Part2-13
Multi-way Junction Box PCB with 12V PSU (Q07) Part2-14
Connector (Q01H1) Details for QMI MULTIPLEX CMU - Junction Box Part2-15
Cable Details for Atmospheric Sensors 6 Pole Socket (Q1006) Part2-16
Connector Details for QMI MULTIPLEX CMU - Junction Box when
used with Atmospheric Sensors (Q10) Part2-18
Wiring Details for Junction Box to Atmospheric Sensors (Q10) Part2-19
Overall View of Connector No. 4 For QMI MULTIPLEX Mains
110/240V Power Socket (Q01H4) Part2-20
110/240V Power Supply Wiring Part2-21
Cable Details for QMI MULTIPLEX Relay Alarm Output (Q01H3) Part2-22
Cable Details for QMI MULTIPLEX Relay Shutdown Output (Q01H2) Part2-23
Alarm Output Wiring Part2-25
Optional Plant Shutdown Wiring Part2-26
Graph to show relationship between mg/L, Digital Readout of
Percentage of Alarm Level and the Percentage of LEL Part2-27
QMI MULTIPLEX 4-20mA Data Logger Output Part2-28
Cable Details for QMI MULTIPLEX 4-20mA Data Logger Output
(Q01H5) Part2-29

PART 3
STARTING UP/RUNNING PROCEDURE

Operation Part3-2
Operation of Alarm Relays Part3-3
Setting and Changing Alarm Levels Part3-4
Test Sequence Part3-5
Checking Alarm Levels and Reading Channels Part3-6
Changing the Number of Sensors Part3-7
Setting Up of Sensors Required Part3-8
To Isolate or Restore a Channel Part3-8
Response to Alarm Part3-9

PART 4
FAULT FINDING

Drawing – Layout of Transistors and Fuses Part4-2
Fault Directory Part4-3

PART 5
MAINTENANCE

Maintenance Procedures Part5-2
Lens Cleaning Procedure Part5-3
Replacing Fan (Q1004) in Sensor Part5-5
Maintenance Kit (Q1005) Part5-6
Suggested Maintenance Plan for Atmospheric Sensors Part5-7

PART 6
SPARES

Codes and Description for Replacement Parts and Spares Part6-2
Returns Procedure Part6-3
QMI Continual Support Information Request Part6-4

Atmospheric Oil Mist Detection System

MULTIPLEX

PART 1

INTRODUCTION

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Introduction Part1-1

MULTIPLEX

TECHNICAL SPECIFICATIONS

POWER SUPPLY Nominally 110/240VAC 50/60 Hz

Atmospheric Oil Mist Detection System

MAXIMUM POWER
CONSUMPTION

MAXIMUM SAMPLING
CHANNELS

CYCLE TIME 500 milliseconds simultaneously on all channels
MEASURING SYSTEM Time multiplex analogue signal
SYSTEM OUTPUTS - RELAYS All relays fitted with maximum change contacts

Main alarm Normally energised with 1 set of change over

Early warning alarm Normally energised with 1 set of change over

Function shutdown alarm Normally de-energised with 1 set of change over

Fault alarm Normally energised with 1 set of change over

OPERATING TEMPERATURE 5-70°C
MULTIPLEX DIMENSIONS (mm) WEIGHT (kg)

100W

12

voltage rating 110V@8A to 240V 5A

contacts

contacts

contacts.

contacts

Central Monitoring Unit (CMU) 403 x 312 x 128 10

Sensor (DH) 359 x 113 x 73 2.30

MONITOR SEAL 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

Internal FS3 -400mA Data Logger PCB Protection

External FS4 -110/240VAC 3.15A anti-surge

OPERATING TEMPERATURE:

Monitor (Q01H)

FEATURES Continuous self-monitoring fault diagnosis

OPTIONAL 4-20mA output for up to 12 individual alarms or

5° - 70°C

Manual test facility of all functions
Functional shutdown (e.g. hydraulic pack)

data-logging of alarms See Part 2-29 and 2-30.

Introduction Part1-2

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Atmospheric Oil Mist Detection System

MULTIPLEX

QMI MULTIPLEX MONITOR

Magnetic pen

Testing

CPU indicator

Alarm setting switches

Alarm level viewing switch

Fuse (FS3 - Q0115)

Security key switch

Test

Testing

Isolate, reset and test switches

No CPU

Raise alar m level

Reset

Isolate

12

11

10

9

Lower alar m level

C lean detecto r according to instruc tions

%

mgm/lit re

detector.

Setting

Alarm leve l

FAULT DIR ECTORY

Channel Reading Fault Condition Ac tion requir ed

1-12 F1 C able fault Check/r epair relev ant cable

1-12 F2 D etector dir ty

1-12 F3 D etector fau lty Clean as F2 first or replace de tector

1-12 IC Isolated Ci rcuit Checkin g operating instructio ns

C F4 Fan Failur e Check fan and fa n failure d etecting sy stem

NOTE: if ' No CPU' lig ht is on, r efer to man ual.

'dd' on t est is dirty

'cd' on t est is clean detector.

Fault directory

8

7

Reading

6

5

4

Channel

Channel n umber

l + Test + Channel n umber

Alarm leve

Test

Alarm leve l +

Channel n umber

Circle

Isolate + Cha nnel number

!

Reset

Isolate + Rese t + Channel num ber

3

2

1

Channel number

OPERATING INSTRUCTION S

Magnet Pe n FLAT over specified c ircle

To display a function , place

Detector a larm test

Isolate de tector

Channel l evel reading (%)

Self-test programme

Pre-set a larm level ( mgm/litre)

Function

Restore de tector

Normal ope ration

Quality Mo nitoring In struments, London, NW6 2HL, UK

Oil mist level reading, setting and fault location read out

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Alarm indicator

Channel switches

Oil mist status LED and

Power indicator

Channel identification

Setting indicator LEDs

Operating instructions

Introduction Part1-3

MULTIPLEX

Atmospheric Oil Mist Detection System

Introduction Part1-4

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Atmospheric Oil Mist Detection System

MULTIPLEX

DESCRIPTION OF CENTRAL MONITORING UNIT (CMU)

The CMU contains:

1. Display panel with MULTIPLEX PCB

2. Power Supply Board with Power Supply Unit (PSU)

3. Multi-way connectors using terminal plugs and Harting connectors for wiring of
alarms and functions, Sensors and mains power supply

4. Fuses (FS1, FS2, FS3 and FS4)

5. Security key switch assembly (Part 1-3)

1. DISPLAY PANEL (Part 1-3)

Access to the CMU is by way of the hinged Display Panel sub - assembly. The 4 x M6
socket head screws retain the display panel. Upon removal of the screws the panel can
be swung away from the main enclosure.

PCB (Q0106) (Part 1-3)

The display panel sub-assembly carries the main MULTIPLEX PCB type MP12 v 3.2
Processing Board, with the Binary Switch and Flash Memory Chip which is attached to
the display (Monitor faceplate) by 6 x cheese head screws.

2. POWER SUPPLY BOARD with PSU

The Power Supply Board consists of a switch mode power supply unit mounted on a
PCB. The PCB holds the fuses, the transistor TR1 (Q0111), and the terminal plugs and
carries the alarm relays.

3. MULTI-WAY CONNECTORS

The terminal plugs and Harting connectors used for wiring are provided as part of the
QMI MULTIPLEX system. It is very important that the installers pay attention to the
pins of connectors so as not to damage the plugs or sockets and to ensure a good
connection.

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Introduction Part1-5

MULTIPLEX

Atmospheric Oil Mist Detection System

4. FUSES

There are 4 fuses on the MULTIPLEX Power Supply Board, see Fault Directory in Part 4.

FS1 (Q0114) is a 1.25A anti-surge fuse. This is connected to TR1 and is the supply to
the Sensors. The LED 1, which is underneath, will flash when all is well.

FS2 (Q0112) is a 400mA anti-surge fuse for 12V power to the fans. The LED will light
when all is well.

FS3 (Q0112) is a 400mA anti-surge fuse to protect the Data Logger PCB and also has
a Green LED3 light which is lit constantly (not flashing).

FS4 (Q0115) is a 3.15A anti-surge fuse and is fitted to the side of the Monitor.

5. SECURITY KEY SWITCH (Part 1-3)

The Chief Engineer possesses the only set of keys (Q0103) to change settings. It is
possible to check the settings without using the security key switch, see Part 3-4.

NOTE: The Monitor does not have an on/off switch this is to prevent the oil mist
Sensors from being switched off. To turn off the power disconnect the power supply.

Introduction Part1-6

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Atmospheric Oil Mist Detection System

MULTIPLEX

DESCRIPTION OF SENSORS (Q10)

See photo Part 1-8

The Sensor operates using the principle of light scatter (nephelometry). The power
and signal are transmitted to and from the Monitor through a single cable sending a
timed analogue signal. All Sensors sample simultaneously and continuously every half­second (500 milliseconds).

The assembled Sensor comprises:

(a) Articulated Joint and mounting flange
(b) Chamber

a) ARTICULATED JOINT AND MOUNTING FLANGE

See drawing Part 1-9

The Articulated Joint is fitted to bulkhead or deckhead allowing the Sensor to be
positioned facing the flow of air in the chamber being monitored.
The sub-assembly is fitted to the Articulated Joint by 4 screws, which can be removed
if and when the Sensor lens requires cleaning.

b) CHAMBER

Inside the unit are the PCB, integral fan, and sensing lenses. Power is supplied to the
12V fan by a single cable, which is connected to the Monitor (or to a Junction Box).
The fan draws the sample of air past the sensors through the outlet ports.

In the front of the Sensor unit are the air intake louvers, and an LED, which shows
green when the fan is working. The electronics are mounted on the back of the chamber
casing and are protected by the cover sealed to IP65.

At the back of the unit is the multi-purpose power and signal socket. Next to the socket
is the mounting spigot.

NOTE: The integral fan is interchangeable without recalibrating the Sensor.

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Introduction Part1-7

MULTIPLEX

PHOTOGRAPH OF SENSOR (Q10)

Atmospheric Oil Mist Detection System

Introduction Part1-8

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Atmospheric Oil Mist Detection System

MULTIPLEX

DRAWING OF ATMOSPHERIC SENSOR

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Introduction Part1-9

Atmospheric Oil Mist Detection System

MULTIPLEX

PART 2

INSTALLATION

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Installation Part2-1

MULTIPLEX

Atmospheric Oil Mist Detection System

Installation Part2-2

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MULTIPLEX

Atmospheric Oil Mist Detection System

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Installation Part2-3

MULTIPLEX

POSITIONING AND LOCATION OF SENSORS

NUMBER OF SENSORS REQUIRED

It must be taken into consideration that the number of Sensors will depend on the
pressure being released into the atmosphere which is relative to the volume of the
space. It will also depend on the amount of air movement.

In a large engine room you may need 4 or 5 Sensors, for a hydraulic pack room 1 to 3
Sensors are sufficient. In purifier and compressor rooms one is usually enough. For all
other spaces such as steering gear or bowthruster housing use 1 or 2 Sensors.

Remember, any spare channels can be used later.

NOTE: Sensors cannot be used in cargo pump rooms as they have not been certified
for hazardous zones.

Atmospheric Oil Mist Detection System

LOCATION OF SENSORS

Please follow the guidelines outlined below to get the best results.

We recommend using a smoke test aerosol or smoke generator to judge the way the
air flows over the machinery. Normally air will move toward ventilation extractors or
the turbo charger, therefore, the Sensor must be placed in the air stream as close as
possible to the machinery.

The Sensor comes with a fixing flange which is welded on the Articulated Joint. We
suggest the length of cable that runs to the Sensor is longer than required to enable
the Sensors to be moved at a later date if deemed necessary.

To confirm that the Sensors are correctly positioned you should carry out the following
test; wait until the engines, ventilation and other machinery are fully operational, then
once again use your smoke test aerosol or smoke generator to prove the Sensors are
correctly positioned. The Sensor should be rotated until positioned mid airflow as
indicated by the movement of smoke.

NOTE: Always place the Sensor in a position so that it can be easily maintained as the
Sensors should be cleaned regularly.

Installation Part2-4

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Atmospheric Oil Mist Detection System

MULTIPLEX

POSITIONING OF QMI ATMOSPHERIC OIL MIST SENSOR
(Q10)

We discuss below how the movement of oil mist in the atmosphere responds in working
environments and suggest how the placement of Sensors in an optimum position is
determined by flow of air. The Sensors may have to be adjusted when setting up
the system or even later when any structural alterations, machinery changes or more
powerful fans are introduced within the area.
There are so many variables in the detection of oil mist in the atmosphere that it is by no
means an exact science. Common sense has a part to play when positioning Sensors.

HOW MUCH AIR DOES THE SENSOR DRAW?

It pulls through 23 cubic feet/min or 0.65 m3/min

WHAT IS THE DETECTING RANGE?

There is no detecting range for the Sensor. The Sensor uses its internal fan to draw
in air, which is measured for oil mist. Three sensors inside the atmospheric Sensor
measure backscatter of light in the air drawn into the Sensor, and dirt on the lenses.

WHAT ARE THE FACTORS THAT DETERMINE THE POSITIONING AND NUMBER OF
SENSORS NEEDED?

Four factors determine good positioning and number of Sensors. These factors should
be considered together and a smoke generator is a good way to observe air movement
and test positioning of the Sensors.

a. Size of room or chamber (e.g. hydraulic pack area or engine room)

The fan in the Sensor has a through-put of 0.65m3 per minute. In a large room,
more Sensors will allow a faster response. Also, dispersal of oil mist will be
greater in a larger space and will require more careful positioning on the Sensors
in the path of airflow.

b. Air circulation

In addition, the movement of air affects how many Sensors should be installed.
If a room has only one vent then the Sensor placed near this vent will be able to
sample the air extracted from the room. However, if there is more than one vent
or point of extraction a Sensor is best placed in each path of air being drawn
from towards each of these vents. This is why a smoke test aerosol or a smoke
generator is used to ensure that the Sensor points towards the potential source
of oil mist. The Sensor should be installed with the intake louvers facing the
path of the smoke as shown by the smoke generator. The smoke generator will
also show any eddies or paths that the air may follow in the chamber which is
important to ensure that Sensors are correctly positioned.

In hydraulic pack areas there should be a Sensor between each extractor and the
packs which normally means 2 to 3 Sensors especially if the pack is in the engine
room. This should be bourn in mind with any areas are being monitored.

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Installation Part2-5

MULTIPLEX

E

Atmospheric Oil Mist Detection System

c. Proximity to potential source of oil mist

A Sensor should be placed downstream of the airflow around a potential source
of oil mist (e.g. hydraulic pump). The closer the Sensor is to the machinery, the
faster the response time should be.

d. Number of potential sources of oil mist

A fourth factor is the number of potential sources of oil mist. To make it easier
to determine the source of oil mist, each piece of machinery or potential oil mist
source should have a Sensor installed immediately down-stream of the airflow to
ensure the fastest response possible.

In an engine room several Sensors are needed but the exact location will vary according
to airflow.

xtractor/ Vent

EDDY 1

source of

oil mist

EDDY 2

Direction of movement of air

Extractor/ Vent

Direction of movement of air as part of an eddy.

Location of Detector

EDDY 1

EDDY 2

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EDDY 1 does not require monitoring as it up stream of the
potential oil mist source

Location of Detector in EDDY 2 is recommended as oil mist may
be drawn away from the vent.

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Atmospheric Oil Mist Detection System

MULTIPLEX

SCHEMATIC OF POSITIONING OF SENSORS AND BEST
PRACTICE

The Articulated Joint allows the Sensor to be positioned mid airflow.

See Part 1-9 for the drawing of the Sensor and Articulated Joint.

BEST PRACTICE

Until the ship is in operation, to avoid contamination of the lenses after installation,
cover Sensors with a plastic bag. This will prevent paint or other materials dirtying or
damaging the lenses, blocking the Sensor louvers and fan. This outcome permanently
damages the Sensors and may require Sensors to be returned to QMI for repair.

When oil mist detection system is in operation:

· Do not conduct painting in the space with the Sensors

· Never cover Sensors

When Sensors are installed but not in operation:

· Keep Sensors in sealed plastic bag

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Installation Part2-7

MULTIPLEX

Atmospheric Oil Mist Detection System

SETTING ALARM LEVELS

For setting alarm levels see Part 3-4 of this manual for this procedure. Begin by setting
all the Sensors at 0.05mg/L. There will always be areas where there is oil mist; for
instance in the purifier room. The alarm level must be set to a higher level than needed
so that the system does not go into alarm when there is no problem.

TEST PROCEDURE

As these Sensors are sensitive to smoke, steam or oil mist, artificial smoke can be
used to test the Sensors. This is the most effective way of proving the Sensors are
working.

Installation Part2-8

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Atmospheric Oil Mist Detection System

MULTIPLEX

MONITOR WITH HARTING CONNECTORS

See Part 1-4

1. 32-way (1-16 female, 17-32 male) signal; supply to Multi-way Junction Box

2. 4-way female shut/slowdown output open or relay

3. 10-way female alarm output

4. 4-way male mains input

5. 16-way female data logger output (optional)

MATING CONNECTORS FOR THE ABOVE

Connector Part No.

1

2

3

4

5

32-way (1-16 male, 17-32 female) - maximum
overall dimension of cable 30mm

4-way male - maximum overall dimension of
cable 12mm

10-way male - maximum overall dimension of
cable 20mm

4-way female - maximum overall dimension of
cable 12mm

16-way male - maximum overall dimension of
cable 20mm

Q01H1

Q01H2

Q01H3

Q01H4

Q01H5

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Installation Part2-9

MULTIPLEX

CABLE SPECIFICATIONS

For the following connection we RECOMMEND THE MINIMUM TYPE AND SIZE as
follows:
Halogen free instrumentation, control and communication cable for fixed installation in
ships or equivalent appropriate specifications for application.

Conductor: Standard copper conductor, annealed, IEC228 CLASS 2
Insulation: According to appropriate standards

Atmospheric Oil Mist Detection System

Pairs: Two core twisted cable size 1 x 4 x 0.5mm2 or 0.75mm
Stranding: Pairs stranded together
Screening: Braid of Annealed Copper Wires. Filler tape under braid

Connector Connection Number of conductors and Cross section

(n x mm2)

2

1

Monitor to
Junction Box

19 x 2 x 0.75mm

2

Monitor to Alarms

2

or Shutdown

4 x 2 x 0.5mm

2

(optional)

3

Monitor to Main
Alarm

4 Monitor Power

Junction Box to
Sensors

Power to Junction
Box

4 x 2 x 0.5mm

3 x 1.5mm2 rating Minimum 3A LNE (LN ) not
twisted

4 x 2 x 0.5mm2 (for lengths over 100m,

0.75mm2 size wire should be used)

3 x 1.5mm2 rating Minimum 3A LNE (LN ) not
twisted

2

W

W

Example supplier: Helkama of Finland (LKM - HF for 3 x 1.5 power cable) and RFE ­HF for 4 x 2 x 0.5mm2 twisted connection cables.

WIRING OF ALARM

If wiring just one side of each relay is either open or closed, use 6 cores.
If both sides of relay are being wired 9 cores will be required.

EARTHING OF SENSORS

The screen is normally connected to Pin 5. No earth should be made at the Sensor
end as this could result in ground loops. Earths made to any other point from the
screen wire between Monitor and Sensor will be ineffective and could cause additional
interference.

Installation Part2-10

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Atmospheric Oil Mist Detection System

MULTIPLEX

WIRING DESCRIPTION

The wires are terminated into Harting plugs. These plug into the connectors on the
MULTIPLEX power supply board (PSB).

WIRING FOR POWER SUPPLY 110/240 VAC

The Mains connector is a 4-pin with Live, Neutral, and Earth. On the Power Supply
Board this is marked L, N + See drawing of connector QMI-05-1106, Part 2-20.

Cable is 3 core of 1.5mm2 and can be sourced from Helkama, part number is LKM - HF
3 x 1.5.

WIRING FOR SENSORS

The Sensors are wired using 3 twisted - pair cable. Each connector is wired left to right
and numbered 1 to 6. The cable specification is 3 twisted pair of 0.5mm2 or 3
twisted pair of 0.75mm2 where distance is over 100 meters.

This cable can be sourced from Helkama: part number is RFE - HF 4 x 2 x 0.5mm2 or
4 x 2 x 0.75mm2.

Terminal 1 = Sensor supply +
Terminal 2 = Sensor signal
Terminal 3 = Sensor supply common
Terminal 4 = Sensor signal common
Terminal 5 = Drain wire/screen
Terminal 6 = Fan 12V DC supply

See drawings for wiring connectors Part 2-19 and QMI-05-1105 on Part 2-23. Also
wiring of socket QMI-05-1104 Part 2-22.

There are three warning alarms: Early warning, Shutdown, and Main. There is also a
Fault Alarm.

The cable to use for wiring of alarms can be the same as used for wiring of air sensors.
If you intend to use all four alarms you will need a 4 twisted pair cable.

Wiring for Monitor to Junction Box QMI-05-1101 Part 2-15.
Wiring for functional relay see drawing QMI-05-1105 Part 2-23.

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Installation Part2-11

MULTIPLEX



ADHESIVE HEAT SHRINK

WIRING OF SOCKET

Atmospheric Oil Mist Detection System

200mm

125mm





 



j Retaining ring
k Connecting block with terminals
lBared and tinned wires
mMain housing of socket
n Cable locking screw
o Main securing thread to hold socket to plug
p 24mm adhesive heat shrink sleeving (not supplied by QMI)

200mm



ASSEMBLE INSTRUCTIONS

1. Strip back about 125mm of outer sheathing of cable and separate the wires.
Then tin the ends of wires and the drain wire/screen being used.

2. Assemble socket on to wire in the sequence shown in illustration. By passing
wires through parts mnoandp

3. Wire bared wires and screen to correct numbered terminals of Part 2. Numbers
are shown by the terminals. Use drawing QMI-05-1126 Part 2-16.

4. Reassemble and lock with part number j

5. Pull heat shrink p over first part of m and wires to main cable and then shrink
in the appropriate way.

Installation Part2-12

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MULTI-CORE CABLE SIZING TABLE WHEN LESS THAN
10 ATMOSPHERIC SENSORS ARE USED

It is not necessary to use a 19 twisted pair cable between the CMU and the Multi­way Junction Box if less than 10 Sensors are installed.
Below is a chart on how to select a multi-core cable. If fewer Sensors are to be used
the terminals to be wired in the Junction Box are as follows:

- drain connection (31) must always be used

- supply common (25) is used when only 3 or 4 Sensors are used

- supply common (25 & 26) are used when more than 3 or 4 Sensors are used

- supply + (27) is used when only 3 or 4 Sensors are used

- supply + (27 & 28) is used when more than 4 Sensors are used

- fan failure connections (29 & 30) are always used

- 12V Fan Failure connection (32) is always used

NOTE: For further wiring details turn to Part 2-16.

Numbers (25) to (32) refer to terminals.

25 & 26

Supply

Common

No of

Sensors

3 7 7 & 8 4 9 & 10 5 11 & 12 6 13 & 14 7

4 8 9 & 10 5 11 & 12 6 13 & 14 7 15 & 16 8

6 12 13 & 14

7 13 15 & 16

8 14 17 & 18

No of

Twisted

Pairs

Wire No. Pair

No.

15 & 1678

17 & 1889

27 & 28

Supply

+

Wire No. Pair

No.

17 & 18
19 & 20910

19 & 20
21 & 221011

21 & 22

29 & 30 Fan

Failure

Wire No. Pair

No.

21 & 22 11 23 & 24 12

23 & 24 12 25 & 26 13

25 & 26 13 27 & 28 14

Wire No. Pair

32

12V Fan

Failure

No.

19 & 20910

9 15 19 & 20

21 & 221011

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23 & 241112
23 & 24

25 & 261213

27 & 28 14 29 & 30 15

Installation Part2-13

MULTIPLEX

Atmospheric Oil Mist Detection System

Installation Part2-14

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MULTIPLEX

Atmospheric Oil Mist Detection System

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Installation Part2-15

MULTIPLEX

Atmospheric Oil Mist Detection System

Installation Part2-16

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MULTIPLEX

Atmospheric Oil Mist Detection System

Installation Part2-18

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Installation Part2-19

MULTIPLEX

Atmospheric Oil Mist Detection System

Installation Part2-20

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Atmospheric Oil Mist Detection System

MULTIPLEX

110/240V POWER SUPPLY WIRING

1. The 110/240VAC power supplies the Control Monitor Unit (CMU).

2. Below shows the wiring for 110/240 VAC Power Supply.

3. The cable used should be of minimum 3 cores and can range from a minimum
thickness of 0.25mm2 up to 2.5mm2 maximum.

4. Do not use twisted cables.

Harting Pin No Function

1

2

3

4

Live

Neutral

No connection

Earth

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Installation Part2-21

MULTIPLEX

Atmospheric Oil Mist Detection System

Installation Part2-22

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Installation Part2-23

Atmospheric Oil Mist Detection System

MULTIPLEX

ALARM OUTPUT WIRING

1. The alarm outputs are transmitted from the Control Monitor Unit (CMU).

2. The Alarms operate via Open or Closed contacts (Relays).

3. Below are wiring details for the following Alarm types:
i. Main Alarm (Relay 10)
ii. Early Warning Alarm (Relay 7)
iii. Functional Shutdown Alarm
iv. Fault Alarm (Relay 8)

4. The cable used should be a minimum 6 - cores and can range from a minimum
thickness of 0.25mm2 up to a maximum 2.50mm2.

Relay No. Terminal

Block

1

RL7 2 Common

3

4 Fault Alarm Connect to Pin 5 Disconnect

RL8 5 Common

6 Fault Alarm Disconnect Connect to Pin 5

7 Main Alarm Connect to Pin 8 Disconnect

RL10 8 Common

Early Warning
Alarm

Early Warning
Alarm

Function Non - Alarmed Alarmed

Connect to Pin 2 Disconnect

Disconnect Connect to Pin 2

9 Main Alarm Disconnect Connect to Pin 8

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Installation Part2-25

MULTIPLEX

OPTIONAL PLANT SHUTDOWN WIRING

1. The Plant Shutdown outputs are transmitted from the Central Monitor Unit (CMU)
via a 4-way Harting Plug.

2. The Shutdown operates via Open or Closed Contacts (Relay).

3. Below shows the wiring for Plant Shutdown (Relay 9).

4. The cable used should be of a minimum 2 cores and can range from a
minimum thickness of 0.25mm2 up to 2.5mm2 maximum.

Atmospheric Oil Mist Detection System

Relay No Harting

Pin No

1 Plant Shutdown Disconnect Connect to Pin 2

RL9

2 Common

3 Plant Shutdown Connect to Pin 9 Disconnect

Function Un-alarmed Alarmed

Installation Part2-26

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Atmospheric Oil Mist Detection System

OIL MIST DENSITY mg/L OF AIR

Calibration Graph for 1.30mg/L Relationship to % of LEL

FULL ALARM LEVEL

Calibration Graph for 2.00mg/L Relationship to % of LEL

FULL ALARM LEVEL

SHUT/SLOW DOWN RELAY

MULTIPLEX

GRAPH TO SHOW RELATIONSHIP BETWEEN MG/L,
DIGITAL READOUT OF PERCENTAGE OF ALARM LEVEL
AND THE PERCENTAGE OF LEL

SHUT/SLOW DOWN RELAY

EARLY WARNING RELAY

1.50

MAXIMUM ALLOWABLE DENSITY BEFORE ALARM (1.30mg/L)

1.25

1.00

0.75

0.50

PR E SET S ENSI T IVIT Y LEVE L

0.25

0

10 20 30 40 50 60 70 80 90 100

WH I CH C A N ON L Y BE LOWER ED

% OF ALARM WITH 1.30mg/L PROGRAMME

GREEN

DIGITAL READING

EARLY WARNING RELAY

FLASHING

YELLOW

FLASHING

RED

2.00

1.00

0.50

% OF LOWER EXPLOSION LIMIT (LEL) 50mg/L

2.00

1.80

1.60

1.40

1.20

1.00

0.80

0.60

OIL MIST DENSITY mg/L OF AIR

0.40

0.20

MAXIMUM ALLOWABLE DENSITY BEFORE ALARM (2.00mg/L)

PR E SET S ENSIT I VITY L EVEL

WH I CH CA N ONL Y BE L OWERE D

0

10 20 30 40 50 60 70 80 90 100

% OF ALARM WITH 2.00mg/L PROGRAMME

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GREEN

DIGITAL READING

FLASHING

YELLOW

FLASHING

RED

4.00%

3.00%

2.00%

1.00%

% OF LOWER EXPLOSION LIMIT (LEL) 50 mg/L

Installation Part2-27

MULTIPLEX

QMI MULTIPLEX 4-20MA DATA LOGGER OUTPUT

It is useful to be able to record the level of oil mist present in the crankspace or
gearbox.

The data collected can be used to determine the cause of a build-up towards a possible
explosion and help find a solution. It will also record a rise in oil mist generated by
temperature caused by fitting new parts. Finally it can record events such as inclusions
caused by piston blow-by.

The Monitor sends out a 4-20mA signal corresponding to the displayed mist percentage
for each Sensor. This is a digitally calculated reading taking into account temperature
non-linearities of the Sensors and oil deposit build-ups within the Sensor.

The signal can be recorded using a chart recorder, or data logger and corresponds to
the reading shown in the display.

Atmospheric Oil Mist Detection System

Current = (Display % x 16 ÷156) + 4

Display 0 10 20 30 40 50 60 70 80 90

mA 4 5.0 6.0 7.1 8.1 9.1 10.2 11.2 12.2 13.2

Display 100 110 120 130 140 150 160

mA 14.3 15.30 16.30 17.30 18.40 19.40 20.41

Display 170 180

mA 21.40 22.50

The 4-20mA output from the Monitor is available on the 16-way connector No.5 in
the centre of the box. See drawing QMI-05-1103 Part 2-29.

The FS3 400mA Fuse has been built in to protect the Data Logger PCB. It has a LED3
Green light which is constantly lit (not flashing) showing there is no fault with the
Data Logger.

Installation Part2-28

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Installation Part2-29

Atmospheric Oil Mist Detection System

MULTIPLEX

PART 3

STARTING UP/RUNNING
PROCEDURE

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Running Procedure Part3-1

MULTIPLEX

OPERATION

A sample of air is continuously drawn through each Atmospheric Sensor and the level
of oil mist density is monitored. This process is continuous at each Sensor. The signals
are fed to the micro-processor which is located in the CMU.

The signals are scanned at 500 millisecond intervals and the data is presented as a
digital display reading from 0% to 100% of alarm level.

Although oil mist samples are measured in mg/L the reading per channel is presented as
a percentage of the alarm setting.

RELAY AND LED CHART

% Alarm Level Lights Displayed

Atmospheric Oil Mist Detection System

0% to 79% green

80% to 99% amber flashing

100%

Relays activated 80% early warning alarm

100% alarm and plant shutdown

red flashing

OPERATING RANGES

0 - 1.30mg/L
0 - 2.00mg/L

as a percentage of the alarm setting.

Running Procedure Part3-2

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OPERATION OF ALARM RELAYS

The relays work in conjunction with the lights on the CMU display panel:

ALARM SEQUENCE

The minimum alarms used are the Main alarm and Fault alarm. The functional
shutdown (or slowdown) can be used to shutdown the plant.

If used, the functional first relay activates at 80% and is an early warning alarm.

The second main alarm and third (slow or shutdown) alarm are activated at 100%.

FAULT ALARM

See Part 3-10

A fault alarm relay is completely divorced from the other relay systems and is only
activated after a fault has developed in the Oil Mist Detection System. No relays will
activate for 2.5 seconds, as the Monitor will check first that the fault is in the system
and not a problem with the environment.

Even when this fault alarm relay is activated the instrument goes on monitoring
unless there is a major malfunction of the Monitor or Sensor. Information is also
being continuously given as a digital display of the highest concentration of oil mist
and its location.

The digital display will always indicate the channel (i.e. area) with the highest level
of oil mist. IN THE EVENT OF A FAULT ALARM IT WILL BE THE FIRST CHANNEL TO

GO INTO THE FLASHING GREEN, AMBER, RED CONDITION THAT IS INDICATED ON
THE DISPLAY (F1, F2, AND F3).

NOTE: THERE IS A ONE-MINUTE DELAY when the fault alarm sounds. After a self-

test or a channel check the display will always revert to the channel with the highest
oil mist level reading.

ALARM OPERATING RANGES

With Binary switch 5 set to OFF the range is from 0 up to 1.30mg/L.
With Binary switch 5 set to ON the range is from 0 up to 2.00mg/L.

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Running Procedure Part3-3

MULTIPLEX

Oil mist level reading, setting,
and fault location readout

Channel
identification

SETTING AND CHANGING ALARM LEVELS

The QMI MULTIPLEX System is pre-set. However should the settings require adjustment
and the alarm level set lower, then follow the procedure outlined below.

Normal setting for atmospheric systems should be as low as possible, say

0.04 to 0.05mg/L. This is so that once oil mist starts to form it will be detected as
soon as possible.

During the setting-up procedure normal operation of the CMU is disabled, therefore to
set and change alarm levels:

1. With the security key supplied (Q0103), release the security switch, which is
fitted to prevent unauthorised adjustment of the system.

2. Turn the key clockwise ¼ turn (and no more). The light above ‘Check Alarm
Settings’ will illuminate.

3. Place the magnetic pen (Q0109) flat against the circle marked ‘Check Alarm
Settings’.

4. Place the magnetic pen flat against the ‘Raise’ Alarm Level circle marked with
‘+’ or the ‘Lower’ Alarm Level circle marked with ‘ –‘. Raise or Lower the level,
each time removing the pen away from the circle for each increment of Oil Mist
level until the required level is reached. The level will be indicated on the digital
‘Reading’.

5. Place the magnetic pen flat against the circle marked ‘Channel Number’ to set
that channel to the level indicated at the digital reading.

6. To set another channel repeat steps 4 and 5.

7. When setting is complete turn the key anti-clockwise back ¼ turn, this locks the
system, then remove the key.

8. Now the system is locked, it is possible to check the settings by placing the pen
on ‘Check Alarm Settings’ then on ‘Channel Number’. The new set level will then
be displayed.

9. To reset any channel ALL above items MUST be repeated.

Atmospheric Oil Mist Detection System

CHANGING THE DIGITAL DISPLAY USING THE MAGNETIC PEN (Q0109)

Running Procedure Part3-4

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MULTIPLEX

TEST SEQUENCE

Before beginning the test procedure warn the Chief Engineer and the Captain.
To activate the test procedure make sure the security key is turned to running mode
then place the magnetic pen over the circle marked ‘TEST’. The sequential testing
system will commence as follows:

1. Testing indicators will illuminate Software Version – 1.03.

2. The running (green), anticipatory (amber) and alarm (red) indicators will illuminate
in sequence.

3. All digital read-outs will indicate ‘8’.

4. All digital read-outs will then indicate ‘111’ showing that all segments of the
numerical display are working with no fade.

5. Each Sensor lens will be indicated (NOTE: ‘Cd’ indicates clean lens). When ‘dd’
(dirty Sensor) appears on the display, Sensor lenses are under 80% clean. Refer
to lens cleaning instruction, Part 5-3. When dirty, ‘F2’ will automatically show on
the display. If ignored it will go to ‘F3’.

6. All external relays with the exception of the functional relay will operate for 10
seconds. If the system has an audio alarm system it is recommended that the
personnel should be warned of the impending test. The test includes a test of the
fault monitoring circuit, i.e. watchdog, when ‘F9’ will appear momentarily. In the
event of a CMU failure ‘F9’ will be displayed continuously. In this case the PCB
of the Power Supply Relay Board must be replaced.

7. After the relays have been tested the CMU will automatically return to display
the channel with the highest concentration of oil mist.

8. NOTE: After ‘Power On’ or ‘RESET’ procedures are implemented, the relay
outputs are inhibited for 60 seconds in the event of an alarm. This must be noted
if smoke testing is carried out on a Sensor.

9. NOTE: When using the self - test facility, the display will show the condition of
the Sensor i.e. ‘dd’ (the Sensor is dirty) or ‘Cd’ (the Sensor is clean). HOWEVER,

ONE FULL MINUTE SHOULD ELAPSE BEFORE USING THE SELF-TEST FACILITY
AGAIN. This is to allow the software to latch back into the correct running mode;

otherwise erroneous signals may be displayed. During this sequence isolated
Sensors may be displayed ‘Cd’.

Should any function throughout the sequence fail to operate as specified, please refer
to Fault Finding Section, see Part 4.

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Running Procedure Part3-5

MULTIPLEX

CHECKING ALARM LEVELS AND READING CHANNELS

TO CHECK ALARM LEVEL SETTING

To check the pre-set alarm level setting for each individual channel, first place the
magnetic pen over the circle marked ‘ALARM LEVEL’. The alarm level indicator will
illuminate. Place the pen over the ‘CHANNEL’ number. The channel identification digital
display will be shown digitally as a milligrams per litre value in mg/L of oil mist density.
Should the alarm level need to be adjusted then follow the ‘Initial Setting-up Procedure’
(changing alarm levels) and ‘RESET’ the system as previously described.

TO READ INDIVIDUAL CHANNELS

Place the magnetic pen over the required channel circle. The channel number selected
will be shown digitally on the ‘Channel Identification’ display alongside the digital read­out of the percentage density of the pre-set alarm level at the channel. After one
minute the display will revert to the channel with the highest oil mist reading.

Atmospheric Oil Mist Detection System

Running Procedure Part3-6

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MULTIPLEX

CHANGING THE NUMBER OF SENSORS

Setting up the QMI MULTIPLEX System CMU for a different number of Sensors.
The QMI MULTIPLEX can have a total of 12 Sensors plugged into it. The display will show 12
positions illuminated.
The number of Sensors in use can be adjusted by switches located on the back of the MP12
PCB v 3.2.
There is a 10 way Binary switch located on MP12 PCB v 3.2. Switches 1 to 4 are for the
number of Sensors to be set up.

Switches 1-4 are for the number of Sensors to be set up.

Sensors required Switch 1 Switch 2 Switch 3 Switch 4

01 on off off off

02 off on off off

03 on on off off

04 off off on off

05 on off on off

06 off on on off

07 on on on off

08 off off off on

09 on off off on

10 off on off on

11 on on off on

12 off off on on

Switch 5 is for the oil mist range.
With Switch 5 set to OFF the range is from 0 up to 1.30mg/L
With Switch 5 set to ON the range is from 0 up to 2.00mg/L

After changing the set Switch from OFF to ON or ON to OFF, the alarm levels should be
adjusted for each channel.

Switch 6 should always be set to OFF.
Switch 7 should always be set to OFF.
Switch 8 should always be set to OFF.

Switch 9 is for Channel selection display.
Switch 9 is set to OFF the Monitor display will show Channels 1-12.
Switch 9 is set to ON the Monitor display will show Channels 13-24.
If a change is made to Switch 9, the Monitor will need to be reset by placing the magnetic
pen over the reset circle, or turning the key a quarter turn, and then back.

Switch 10 should always be set to OFF.

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Running Procedure Part3-7

MULTIPLEX

SETTING UP OF SENSORS REQUIRED

The first thing to be displayed is the Software Version.
If the display is showing 12 channels and (for example) only 7 Sensors have been
fitted then the display will show positions 8 to 12 as flashing amber, green and red
lights. Also the display reading will show ‘F1’ fault.

To correct or change the QMI MULTIPLEX Monitor to show only 7 channels and
cancel the other positions showing, the following procedure is carried out:

1. Turn off QMI MULTIPLEX Monitor to switch off the system.

2. For safety, unplug the 3-pin power connector from the Monitor.

3. Using the ‘T’ handled Allen key provided, unscrew the front 4 x M6 screws, one
located at each corner of the Monitor.

4. The front of the Monitor is hinged and the front panel can now be swung open.
The display MP12 PCB v 3.2 can be seen screwed in the lid. There is no need to
remove or unscrew this PCB from the lid.

5. The Binary switch blocks are located on the back of the MP12 PCB v 3.2. There
are a total of 10 Binary switches.

6. To program the switches for a number of Sensors, switch to the positions shown
in the above table.

Atmospheric Oil Mist Detection System

TO ISOLATE OR RESTORE A CHANNEL

If a Sensor becomes faulty and requires changing ‘F3’ will appear on the display and
the green, amber and red display will flash. If a Sensor requires cleaning ‘F2’ will
appear on the display. If either the Sensor is not changed or the lens not cleaned,
the fault number will obscure all other readings and the oil mist reading will not be
displayed.

As a temporary measure it is possible to isolate the Sensor from the Monitor panel
(’isolate’ in this instance is to remove the Sensor signal from the Monitor via the
software).

To carry out the isolate function, turn security switch key to set mode, place the
magnetic pen on ‘ISOLATE’ circle, then place it over the ‘CHANNEL’ number. Turn the
key back to 'RUN' mode. The channel/Sensor is now isolated and the display will now
be blank. If the pen is placed over the isolated ‘CHANNEL’ number ‘IC’ will appear on
the display.

After the Sensor has been replaced and/or the lens cleaned, reinstate the channel by
turning the key to set mode, place the magnetic pen on ‘ISOLATE’ circle then on to
‘RESET’. Finally place the magnetic pen on to the ‘CHANNEL’ number and turn the
security key to operating mode. This will put the channel and associated Sensor back
on line.

Running Procedure Part3-8

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RESPONSE TO ALARM

There are two stages of oil mist alarm indication:

1. ANTICIPATORY/EARLY WARNING

At 80% the light will assume the ‘flashing’ mode.

The channel number will be indicated and the digital reading will indicate the percentage
density of the pre-set mist alarm level. The early warning alarm relay will operate.

NOTE: This alarm is automatically operated when the oil mist density level reaches
80% of the pre-set alarm level.

2. FULL ALARM

At 100% of alarm level the red indicator will flash indicating that the oil mist level is
above the pre-set alarm level. The offending channel will be displayed alongside the
digital read-out level. The functional shutdown relay alarm RL9 will operate if wired
into the system. At this level RL10, the main alarm, will be activated. Further action
should be taken in accordance with the standard procedures.

Over-riding the QMI MULTIPLEX system during procedures that may introduce particles
into the atmosphere (e.g. painting) is at the operator’s discretion. If such a function is
required it should be incorporated in the ship’s overall system.

IMPORTANT: When any alarm sounds all personnel should leave the area.

IMPORTANT NOTICE:

With Atmospheric Oil Mist Detection Systems, the alarm point should be set quite
low, so that the Main Alarm activates as soon as there is any Oil Mist sensed in the
Atmosphere.

The Oil Mist level will increase so quickly that the Early Warning and Main Alarm will
activate almost simultaneously.

The Early Warning Alarm would normally be used in Engine Crank Case Oil Mist
Detection systems where the Oil Mist increase, usually, more slowly.

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Running Procedure Part3-9

MULTIPLEX

Atmospheric Oil Mist Detection System

3. FAULT ALARMS

The fault alarms indicate if there is any fault in the monitoring system. The Monitor
faceplate has a list of the fault alarms and their significance. This uses relay RL8. See
table below for the fault conditions as presented on the Monitor faceplate. For more
information see the Fault Directory in Part 4.

Channel Reading Response

1 - 12 F1 Check and repair relevant cable

1 - 12 F2 Clean Sensor according to instructions

Clean Sensor

1 - 12 F3

Check Sensor fan
Replace Sensor
See Fault Directory Part 4

1 - 12 F4 System fault alarm

C IC Channel isolated

If ‘No CPU’ light is on, there is a processor fault.
‘dd’ on test indicates when the Sensor is dirty so it is necessary to clean the lens.
‘cd’ on test indicates when the Sensor is clean.

Running Procedure Part3-10

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Atmospheric Oil Mist Detection System

MULTIPLEX

PART 4

FAULT FINDING

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Fault Finding Part4-1

MULTIPLEX

Atmospheric Oil Mist Detection System

Fault Finding Part4-2

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Atmospheric Oil Mist Detection System

MULTIPLEX

FAULT DIRECTORY

FAULT ACTION REMEDY

1. Make up a short lead
with 6 pin male and
female connectors from
the Maintenance Kit

F1 and Sensor
number is
displayed

F1 and Sensor
number is
displayed

F1 and all
Channel Lights
Flash

F1 and all
Channel Lights
Flash

F2

F3 and Sensor
number is
diplayed

F3 and Sensor
number is
displayed

LED on front
of the Sensor
flashes RED

2. Plug spare Sensor into
Monitor on the defective
channel number shown

If the display becomes steady
this confirms there is a fault
in the cable between the
Monitor and Sensor

Check cable between Monitor
and Sensor

1. Check Fuse FS1 on the
Power Supply Board

2. See Part 4-2

1. Check the Fuse FS1 on
the Power Supply Board

2. See Part 4-2

1. Remove Sensor

2. Clean lens

3. See Part 5-2

Check Sensor lens

Check Sensor fan

Check the cable is earthed between
the Monitor and Sensor as the manual
directs

Check there are NO OTHER earth leads,
or copper earth trips as these will give
interference

F1 denotes cable fault

Check for split or damaged cable
or incorrect earthing - see wiring
instructions

If the fuse has blown replace it with a

1.25A fuse

If the fuse blows again, check complete
wiring of the system for short - circuits
or damaged wires

If the fuse is OK, then TR1 should be
replaced

If a Sensor needs frequent cleaning
investigate source of dirt

1. Take Sensor off

2. Clean lens

3. Replace Sensor

If F3 still shows, return Sensor to QMI
for repair. Isolate channel if there are no
spare Sensors

1. Isolate and remove Q10 Sensor

2. Replace fan with Q1004 following
instructions supplied

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Fault Finding Part4-3

MULTIPLEX

Atmospheric Oil Mist Detection System

FAULT ACTION REMEDY

F4 on display

Mains power to the Junction
Box has failed or has been
turned off

Fuse on the PSU in the
Junction Box has blown

Fuse on the PSU in the
Junction Box has blown again

Bad connection between
Monitor and Junction Box (in
the multi-twisted pair cable)

Bad connection on RED and
BLACK wires from PSU to
AUX connection + and – on
Junction Box PCB

Check that there is mains power getting
to the Junction Box

Replace the fuse with a 3.15A fuse from
the spares kit. (Q0115)

If the fuse blows again, the PSU has
failed and is faulty. Order a replacement
PSU

1. If the PSU is working, remove the
mains power to the Junction Box

2. Connect a piece of wire between
terminals 29 and 30 on the Junction
Box PCB

3. Leaving the mains power
disconnected to the Junction Box,
reset the Monitor

4. If F4 has now gone, the cable from
the Monitor to the Junction Box is
okay

5. Remove the links from terminal 29
and 30

With the power connected to the
Junction Box, using a meter when the
PSU is working, check that there is a
shorted connection between terminals 29
and 30 on the Junction Box PCB

If there is an open circuit, it could mean
that the red and black wires between the
PSU and the PCB have a bad connection
or the relay has failed

If the connection is sound, the relay
Relay on the Junction Box
PCB has failed

Fault alarm
comes on. QMI
Monitor shuts
down and
display ceases

Check FS4 fuse on side of
Monitor above security key

Fault Finding Part4-4

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could be faulty. Order a new Junction

Box PCB

3.15A anti-surge fuse may have blown

due to an internal fault in the Monitor.

Check FS4 (Q0115) fuse in the Monitor.

NOTE: Monitors are ex-stock QMI

AM8/JANUARY 2015

Atmospheric Oil Mist Detection System

MULTIPLEX

FAULT ACTION REMEDY

Fault alarm
comes on.
QMI Monitor
shuts down

“No CPU” light
on

LED 1 on PSB
Q0104 not
flashing

LED 1 for TR1
does not light

Check fuse on side of the
Monitor above security key
FS4

Check internal connections

Check fuse FS1 Change blown fuse

FS1 fuse blown

TR1 Faulty

If fuse is OK check external power

supply to QMI system

Fault alarm (will sound) if power is shut

down

The CPU light indicates a fault on

MULTIPLEX Power Supply Board

This board is either carried as a spare or

is ex-stock QMI

Replace FS1 with 1.25A anti-surge fuse.

If fuse keeps blowing then check wiring

and Sensor for faults. See Part 4-2

Replace TR1 with spare in Maintenance

kit Q0111 (take care not to short TR1

during soldering)

LED 2 does not
light

On start up
of the system
Monitor the
display is erratic
and does not
settle down

FS2 fuse blown

Check if cable is screened

Replace FS2 with 400mA anti-surge fuse

If LED 2 still does not light, check for

fault in PSU. See Part 4-2

If cable is screened, check that screen is

connected to Pin 5 at both ends of the

cable. Make sure the braid or drain wire

does not come into contact with other

terminals at either end of the cable

If cable is not screened, check to see

if cable runs near any electrical power

source. If it does, cover cable in steel

conduit. There is no need for extra

earthing, however the screen needs to be

connected to Pin 5 at both ends

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Fault Finding Part4-5

Atmospheric Oil Mist Detection System

MULTIPLEX

PART 5

MAINTENANCE

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Maintenance Part5-1

MULTIPLEX

MAINTENANCE PROCEDURES

The QMI MULTIPLEX incorporates an operational fault finding system, which will
identify operational and component breakdowns. During operational breakdowns, a
fault code is displayed against the relevant Sensor number. The possible fault codes
are listed on the Monitor front plate.

In the event of a component breakdown or fault, the CPU light will come on, see Fault
Directory, Part 4.

With all fault indications the fault warning relay is non - energised. The relay may be
returned to normal through the ‘RESET’ function. The warning indication on the digital
display will persist until the fault is corrected or the channel isolated.

SENSOR CLEANLINESS

Atmospheric Oil Mist Detection System

A large percentage of returns under Warranty are in fact due to dirty lenses. Very often,
due to difficult working conditions and lack of experience, the lenses in the Sensor are
not properly cleaned. This problem is made more difficult because the operator has
to return to the Monitor in order to check the cleanliness of the lenses. The cleaning
process is outlined in Part 5-3.

CLEANING SENSOR LENSES

The Monitor will indicate when the lenses need cleaning (Fault Directory Part 4).

To clean the lenses see Part 5-3.

REPLACING SENSOR FAN (Q1004)

The Monitor will indicate when there is a Fan Fault and F3 will appear (Fault Directory
Part 4-3 & 4-4).

To replace the Fan see Part 5-5.

NOTE: IT IS HIGHLY RECOMMENDED THAT A CLEAN
AND WORKING SPARE SENSOR BE INSTALLED WHILE
CLEANING A SENSOR.

Maintenance Part5-2

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AM8/JANUARY 2015

Atmospheric Oil Mist Detection System

MULTIPLEX

LENS CLEANING PROCEDURE

The “F2” Fault indicator indicates need for lens cleaning on the relevant channel on the
MULTIPLEX CMU (Q01H).
It is advisable to have a clean and working spare Q10 Sensor.

To clean, the lens in the event of oil or condensation build up, use the following
guidelines:

1. Isolate the relevant channel on the CMU:

Turn Security Key (Q0103) to Setting Mode
Using Magnetic Pen (Q0109):
Touch Isolate Button



Touch Channel Button



Turn Key back to Working Mode

2. Unplug cable from Sensor.

3. Holding the Sensor, undo the 4 screws fixing the Sensor body to the
Articulated Joint. Use the Allen Key tool from the Maintenance Kit.

4. Replace with a spare Sensor, if available. Proceed to item (8).

5. In a clean area, remove cover plate by undoing the 4 Button Head Screws.
The tool is in the Maintenance Kit.

6. 3 lenses will be visible inside the chamber. Using a clean cloth and the cleaning
solution "Clean All" to wipe the lenses clean. For badly contaminated lenses,
repeat until clean. Polish the lenses with a clean and dry cloth.
DO NOT SATURATE THE LENSES WITH FLUID.

7. Ensure the chamber is dry. Replace the cover plate.

8. Replace Sensor on Articulated Joint. Make sure Sensor is in original position.

9. Reset the Sensor on CMU:

Turn key to setting mode.
Using magnetic Pen:

Touch Isolate Button,



Touch Reset Button,



Touch Channel Button,



Turn Key to Operate Mode

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SEE IMPORTANT NOTES OVERLEAF

Maintenance Part5-3

MULTIPLEX

Atmospheric Oil Mist Detection System

IMPORTANT NOTES

1. The Sensor electronics are factory calibrated and cannot be serviced on site. In
the event of a fault the Sensor must be sent back to QMI unless it is a faulty fan,
then just change the fan as shown in Part 5-5.

2. DO NOT USE diesel oil, acetone or kerosene to clean Sensors and Sensor lenses.

3. DO NOT IMMERSE Sensor in any cleaning solution.

Maintenance Part5-4

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AM8/JANUARY 2015

Atmospheric Oil Mist Detection System

f
f

fan failure

n

screw

MULTIPLEX

REPLACING FAN (Q1004) IN SENSOR

Remove lid by taking out the four countersunk Allen screws using 2.5mm Allen key
(Q1007).
Remove RED and BLACK wires from fan failure terminal block.
Remove four buttonhead Allen screws holding fan to air sensor using 2.5mm Allen
key.
Fit new fan by replacing four buttonhead Allen screws. Check direction arrows on
fan.
Fit RED wire to the + terminal of fan failure terminal block.
Fit BLACK wire to the - terminal of fan failure terminal block.

an
ailure LED

fan failure terminal block

circuit board

_

+

adjustment
potentiometer

fa

ADJUSTING FAN FAILURE ON Q10 - FH FAN

WARNING: Any attempt to adjust other components on the circuit board will

invalidate the guarantee and may stop the sensor working.

1. Turn the potentiometer screw fully anti - clockwise (15 turns).

2. Connect air sensor to Monitor. The LED on the front of the air sensor will flash
GREEN.

3. Allow 2 minutes before adjusting, by this time the LED should be AMBER with a
RED pulse.

4. Slowly turn the potentiometer clockwise until the LED turns to a steady GREEN.

5. When the LED is showing steady GREEN, turn the same potentiometer a further
quarter turn clockwise.

6. Test for fan failure operation by gently stopping the fan with your finger.

7. Check that the LED flashes RED.

8. Refit Sensor lid using the four countersunk Allen screws, ensuring red and black
wires are not trapped.

9. Wait for two minutes and ensure LED remains constant GREEN.

10. Installation of the Q1004 fan is now complete. Refit Sensor in chosen position.

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Maintenance Part5-5

MULTIPLEX

MAINTENANCE KIT (Q1005)

Code QMI Product Description

Q1004 Replacement Fan For Q10 Sensor - Includes fixing screws

Atmospheric Oil Mist Detection System

Q1006

Q1007

Q1008

Q1010 Cleaning Fluid

Q0103

Q0109 Magnetic Pen To activate displays on Monitor

Q0111 TR1 Transistor

Replacement
Socket

M 2.5 Hexagonal
Allen Key

M 3 Hexagonal
Allen Key

Monitor Security
Keys

6 Pin Bulgin Socket for Sensor

For Sensor lid, inspection cover and fan

For Articulated Joint

“Clean All“ 200ml For cleaning Q10
Sensor lenses

For changing settings on MULTIPLEX
Monitor Q01H (Pack of 2)

On Power Supply Board of Q01H
Monitor

For FS2 on Power Supply Board

Q0112

Q0113

Q0114 1.25 Amp fuse

Q0115 3.15 Amp fuse

Maintenance Part5-6

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400mA
Anti-Surge Fuse

M 4 Hexagonal
Allen Key

For FS3 Data Logger Protection
FS2 only on Monitors with 3 Fuses
(Pack of 5)

To open Monitor lid

For FS1 on Power Supply Board
(Pack of 5)

For FS4 on side of Monitor for Monitors
with 4 Fuses
For FS3 only on Monitors with 3 Fuses
For Power Supply Fuse in Q07 Junction
Box (Pack of 5)

AM8/JANUARY 2015

Atmospheric Oil Mist Detection System

MULTIPLEX

SUGGESTED MAINTENANCE PLAN FOR ATMOSPHERIC
SENSORS

The only regular operation that can be built into a planned maintenance is to clean the
lenses but if the manual test programme is initiate on the Monitor on a say weekly
basis. The indication “dd” on any channel will mean that you have 20% of dirt on the
lenses so it’s a good idea to clean the lenses as soon as it feasible. The system however
can compensate for up to 40% of contamination.

See Part 5-3 on Lens Cleaning Procedure.

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Maintenance Part5-7

Atmospheric Oil Mist Detection System

MULTIPLEX

PART 6

SPARES

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Spares Part6-1

MULTIPLEX

CODES AND DESCRIPTION FOR REPLACEMENT PARTS
AND SPARES

Code QMI Product Description

Q01H QMI MULTIPLEX Monitor With Harting Connectors
Q01H1 Monitor Connector Harting 32-Way Mating Connector 1

(To MULTIPLEX Junction Box)

Q01H2 Monitor Connector Harting 4-Way Plug Mating Connector 2

(To Shutdown Output)

Q01H3 Monitor Connector Harting 10-Way Plug Mating Connector 3

(To Alarm Output)

Q01H4 Monitor Connector Harting 4-Way Socket Mating Connector 4

(To Power Input)

Q01H5 Monitor Connector Harting 16-Way Plug Mating Connector 5

(To Datalogger Output)

Q0103 Monitor Security Keys Monitor Security Switch to change settings

(Pack of 2)

Atmospheric Oil Mist Detection System

Q0104A PCB Type MP12 v 3.2

Processing Board
Q0106 Switch Mode Power Supply No case, for Power Supply Unit for Monitor
Q0109 Magnetic Pen To activate displays on Monitor

For Monitor contains Flash Memory Chip

Q0111 TR1 Transistor Power Supply Board of Q01H Monitor

Q0112 400mA Anti-surge Fuse For FS2 on Power Supply Board

For FS3 Data Logger Protection
FS2 only on Monitors with 3 Fuses

(Pack of 5)
Q0113 M 4 Hexagonal Allen Key To open Q01T Monitor lid
Q0114 1.25 Amp fuse For FS1 on Power Supply Board

(Pack of 5)
Q0115 3.15 Amp fuse For FS4 on side of Monitor for Monitors with

4 Fuses

For FS3 only on Monitors with 3 Fuses

For Power Supply Fuse in Q07 Junction Box

(Pack of 5)
Q10 Atmospheric Sensor With Integral Fan, Mating Connector and

Articulated Joint
Q1002 Manual Installation and Operation Manual

Q1004 Replacement Fan For Q10 Sensor, includes fixing screws
Q1005 Maintenance Kit See Part 5-6

Q1006 Replacement Socket For Sensor, 6 Pin Bulgin Socket

Q1007 M 2.5 Hexagonal Allen Key For Sensor lid, inspection cover and fan
Q1008 M 3 Hexagonal Allen Key For Articulated Joint on Sensor
Q1010 Cleaning Fluid Recommended Cleaning Fluid

“Clean All“ 200ml for cleaning Sensor lenses

Spares Part6-2

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AM8/JANUARY 2015

Atmospheric Oil Mist Detection System

MULTIPLEX

RETURNS PROCEDURE

Guarantee Statement: Sensors returned for service or repair will be guaranteed for
18 months.

1. The equipment being returned has a report with it stating the fault with the equipment;
list the fault number shown on the monitor, the Serial No. of the Monitor (On the Monitor
front plate) and the Serial No. of the Sensor (stamped on the top edge of the Sensor) and
the Serial No. of the Fan Unit if relevant.
Return the Equipment CLEAN with LEADS and CONNECTORS intact.

2. Issue a Numbered Purchase Order, with Invoice and Return address Otherwise goods will
not be processed.

3. Manifest/Packing note with shipment contents.

4. A note to advise us the return address for repaired or serviced equipment.

5. The above documents should be faxed and emailed to QMI, London.
Fax: [phone]
Email: [e-mail]

6. Despatch returned goods to:

Attn: QMI Repair Manager

Quality Monitoring Instruments Ltd.
C/o Cambertronics Ltd.
Unit 12, Manfield Park Industrial Estate
Guildford Road, Cranleigh
Surrey GU6 8PT
UK
Tel: [phone]
Fax: [phone]
Email: [e-mail], cc: [e-mail]

Please ensure that you have included the information and documents in your fax or email
to QMI to request repair of equipment. Providing this information will increase the speed at
which we can repair and return the goods.

CHECKLIST

o Fault Report included/attached

o Fault Number Displayed F1 F2 F3

o Monitor Serial Number

o Sensor Serial Number

o Equipment is clean

o Numbered Purchase Order with Invoice and Return address. E-mailed and included

o Manifest/Packing Note of shipment contents, E-mailed and included

o Name of Contact person email address, telephone number and fax number

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Spares Part6-3

MULTIPLEX

QMI CONTINUAL SUPPORT INFORMATION REQUEST

Now that you are in charge of a

NEW QMI MULTIPLEX Atmospheric Oil Mist Detection System

If you would take the time to provide us with the information outlined below. It will
help us to respond more quickly to any questions or problems you might have in the
future.

1. Name of vessel/or site: _____________________________________________

2. Location of system:_________________________________________________

3. Serial Number of Monitor: ____ ____ ____ ____

4. Number of Sensors: __________

Atmospheric Oil Mist Detection System

5. Serial Number of Sensors: A ___ ___ ___ ___ to A ___ ___ ___ ___

6. Email address: ___________________________________________________

7. Fax number: _______________________________________________________

8. Return address for equipment:_______________________________________

______________________________________________________________________

______________________________________________________________________

______________________________________________________________________

If you have any technical problems, please contact us on the following:
Email: [e-mail]
Tel: [phone]
Fax: [phone]

Should you need to return equipment for service or repair, please see Part 6-3 of this
manual for details on how the equipment should be returned.

Spares Part6-4

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AM8/JANUARY 2015

Quality Monitoring Instruments Ltd.

v 3.2

4 East Barnet Road
London EN4 8RW

Email: [e-mail]
Tel: [phone]
Fax: [phone]

6906012015

visit our website at

www.oilmist.com