MULTIPLEX
Atmospheric Oil Mist Detection System
AM8/JANUARY 2015
EMAIL qmi@oilmist.com WEBSITE www.oilmist.com 4 East Barnet Road, London, England, EN4 8RW TEL +44 (0)20 7328 3121
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.
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