Evikon E2648 Series User Manual

Oxygen
Colourless gas, one of the main components of the air. Oxigen is necessary for
breathing of humans and animals, oxygen deficiency is harmful for health.
Strong oxidizer, sustains combustion.
Chemical formula O
2
Molar weight 32
Relative gas density (to air) 1.1
Conversion 1 ppm =1.31 mg/m
Boiling point -183°C
Odour Odourless
Hazards Strong oxidant. May reacts with
combustible and reducing materials
(oils, solvents etc), causing fire and
explosion hazard. Oxygen enriched
atmospheres (>22% O
significant fire and explosion risk.
Oxygen deficiency in air may lead to
loss of concentration, reduced
coordination, fatigue. At very reduced
levels fainting and death may occur.
Breathing of oxygen at increased
concentrations may lead to hyperoxia
(seizures, respiratory problems,
disorientation).
Normal atmosphere concentration 20.8...21%
Deficiency threshold (OSHA) 19.5%
Immediately life-treatening concentration <10%
Exposure limits not established
3
Conversion of ppm to mg/m is calculated for 25°C and 1 atm.
Installation guidelines
(See Installation and connections section for general information.)
For air quality control install the detector on in the breathing zone. To control the
absence of oxygen (e.g. while working under inert atmosphere) place the sensor in the
working area.
Calibration
Provided that the sensor is used under moderate conditions, no field recalibration is
required. Please contact your dealer for more information.
Emergency mode
The current outputs of the E2648-O2-L may be programmed via Modbus
commands (register 255) to signal if the connection with the sensor is lost. The
signal may be set to 3.8 mA or 21.5 mA. See Annex 1 for more information.
E2648-O2-L_UM_EN
Specifications
Sensor type
Sampling method
Typical detection range
Resolution / digital unit
3
Response time T90
Sensor lifetime
Calibration interval
Signal update
Load resistance
) present a
2
Digital interface
Power supply
Power consumption
Analog outputs
Outputs assignment
Outputs scale width
Cable connections
Enclosure
Dimensions
CE marking
Operating conditions
Relay option
Output relays
Default alarm setpoints
Other options
Remote probe
Evikon MCI OÜ
Tel. +372 733 6310
Rev 31.10.2019
optical (based on fluorescence quenching)
diffusion
0...25% vol
0.01 % vol
< 30 s
>5 years
maintenance free under moderate operating conditions
without extreme fluctuations
every 1 second
R < (Us - 2 V) / 22 mA for 4-20 mA
L
R > 250 kOhm for 0-10 V mode
L
RS485, Modbus RTU protocol
no galvanic isolation
11...30 VDC as standard,
options: 24 VAC or 90...265 VAC
< 2 VA
2 × 4-20 mA / 0-10 V, user settable
OUT1 2 gas; OUT2 2 gas
Not below 10 × resolution
Recommended: 20-100% of the detection range
screwless spring loaded terminals
die-cast aluminium, wall mount, protection class IP66
H120 × W125 × D57 mm
according to 2014/30/EU and EN61326-1 requirements
-30...60 °C, 15...90 %RH, pressure 0,9...1,1 atm;
non ATEXrated areas, non-aggressive atmosphere
2 × SPST relays (closing contact),
250 VAC / 30 VDC, 5 A max
RE1 (HIGH): set 19.5%, release 20.5%
RE2 (LOW):set 18%, release 19%
protection IP65, shielded cable, default length 3.0 m
Teaduspargi 7, Tartu info@evikon.eu
50411 Estonia www.evikon.eu
Fluorescence-Based
Oxygen Detector-Transmitter
E2648-O2-L
User Manual
®
PluraSens