QMI MULTIPLEX Series User manual

MULTIPLEX™
Oil Mist Detection System
Manual
ATMOSPHERIC SENSOR
AM8/JANUARY 2015

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.
Atmospheric Oil Mist Detection System
MULTIPLEX
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
AM8/JANUARY 2015
EMAIL [email protected] WEBSITE www.oilmist.com 4 East Barnet Road, London, England, EN4 8RW TEL [phone]
Introduction Part1-1
PART 1
INTRODUCTION

MULTIPLEX Atmospheric Oil Mist Detection System
AM8/JANUARY 2015
EMAIL [email protected] WEBSITE www.oilmist.com 4 East Barnet Road, London, England, EN4 8RW TEL [phone]
Introduction Part1-2
TECHNICAL SPECIFICATIONS
POWER SUPPLY Nominally 110/240VAC 50/60 Hz
MAXIMUM POWER
CONSUMPTION
100W
MAXIMUM SAMPLING
CHANNELS
12
CYCLE TIME 500 milliseconds 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
Function shutdown alarm 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
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)
5° - 70°C
FEATURES Continuous self-monitoring fault diagnosis
Manual test facility of all functions
Functional shutdown (e.g. hydraulic pack)
OPTIONAL 4-20mA output for up to 12 individual alarms or
data-logging of alarms See Part 2-29 and 2-30.

Atmospheric Oil Mist Detection System
MULTIPLEX
AM8/JANUARY 2015
EMAIL [email protected] WEBSITE www.oilmist.com 4 East Barnet Road, London, England, EN4 8RW TEL [phone]
Introduction Part1-3
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 Fault 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
%
QMI MULTIPLEX MONITOR

MULTIPLEX Atmospheric Oil Mist Detection System
AM8/JANUARY 2015
EMAIL [email protected] WEBSITE www.oilmist.com 4 East Barnet Road, London, England, EN4 8RW TEL [phone]
Introduction Part1-4

Atmospheric Oil Mist Detection System
MULTIPLEX
AM8/JANUARY 2015
EMAIL [email protected] WEBSITE www.oilmist.com 4 East Barnet Road, London, England, EN4 8RW TEL [phone]
Introduction Part1-5
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.

MULTIPLEX Atmospheric Oil Mist Detection System
AM8/JANUARY 2015
EMAIL [email protected] WEBSITE www.oilmist.com 4 East Barnet Road, London, England, EN4 8RW TEL [phone]
Introduction Part1-6
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.

Atmospheric Oil Mist Detection System
MULTIPLEX
AM8/JANUARY 2015
EMAIL [email protected] WEBSITE www.oilmist.com 4 East Barnet Road, London, England, EN4 8RW TEL [phone]
Introduction Part1-7
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 half-
second (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.

MULTIPLEX Atmospheric Oil Mist Detection System
AM8/JANUARY 2015
EMAIL [email protected] WEBSITE www.oilmist.com 4 East Barnet Road, London, England, EN4 8RW TEL [phone]
Introduction Part1-8
PHOTOGRAPH OF SENSOR (Q10)

Atmospheric Oil Mist Detection System
MULTIPLEX
AM8/JANUARY 2015
EMAIL [email protected] WEBSITE www.oilmist.com 4 East Barnet Road, London, England, EN4 8RW TEL [phone]
Introduction Part1-9
DRAWING OF ATMOSPHERIC SENSOR

Atmospheric Oil Mist Detection System
MULTIPLEX
AM8/JANUARY 2015
EMAIL [email protected] WEBSITE www.oilmist.com 4 East Barnet Road, London, England, EN4 8RW TEL [phone]
Installation Part2-1
PART 2
INSTALLATION

MULTIPLEX Atmospheric Oil Mist Detection System
AM8/JANUARY 2015
EMAIL [email protected] WEBSITE www.oilmist.com 4 East Barnet Road, London, England, EN4 8RW TEL [phone]
Installation Part2-2

Atmospheric Oil Mist Detection System
MULTIPLEX
AM8/JANUARY 2015
EMAIL [email protected] WEBSITE www.oilmist.com 4 East Barnet Road, London, England, EN4 8RW TEL [phone]
Installation Part2-3

MULTIPLEX Atmospheric Oil Mist Detection System
AM8/JANUARY 2015
EMAIL [email protected] WEBSITE www.oilmist.com 4 East Barnet Road, London, England, EN4 8RW TEL [phone]
Installation Part2-4
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.
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.