Evikon PluraSens E2618-LEL Manuale utente



PluraSens®



Combustible Gas Transmitter

E2618-LEL



User Manual



E2618-LEL Rev 08.12.2020
Table of contents
Acetylene 4
Butane 5
Hydrogen 6
Methane 7
Propane 8
Specifications 9
Product description 11
Safety requirements 11
Operating conditions 11
Installation guidelines 12
Wall mount version 12
Duct mount version 12
Mounting dimensions 13
Sensor probe handling 14
Gas sensor replacement procedures 14
Operation 16
Maintenance 16
Calibration 16
Delivery set 17
Order code for E2618-LEL options 17
Configuring 18
Return to default settings 18
Modbus RTU Communication 19
RS485 communication interface 19
Communication parameters 19
Modbus holding registers 19
2

E2618-LEL Rev 08.12.2020

Warranty 23

Manufacturer contacts 23

 

3

E2618-LEL Rev 08.12.2020

Acetylene

A colorless flammable gas, lighter than air. Mixtures with air are explosive. It results from              

the interaction of calcium carbide with water. In industrial production, acetylene is mainly            

manufactured by the pyrolysis of light hydrocarbons.

Acetylene is widely used for welding and cutting of metals. The usage of acetylene as a               

feedstock in the chemical industry declines due to cost and environmental considerations.

Synonyms/Trade Names: Ethine, Ethyne.

 

4

Chemical formula

HC≡CH

Molar weight

26

Relative gas density (to air)

0.90

Conversion

1 ppm = 1.06 mg/m3

Boiling point

-84 °C

Low explosive limit (LEL), % vol. in air

2.3* (2.5**)

Upper explosive limit (UEL), % vol. in air

100

Odor

Odorless or with a faint ethereal smell if pure. The

commercial-grade may have a garlic-like smell due to

impurities.

Hazards

Highly flammable.

Gas/air mixtures are explosive. Forms explosive

acetylide compounds with copper, mercury, silver &

brasses (containing more than 66% copper).

Asphyxiant. Non-toxic, but, when generated from calcium

carbide, it can contain toxic impurities such as traces of

phosphine and arsine.

Exposure limits 

(NIOSH)

REL C

2662 mg/m3 /2500 ppm

E2618-LEL Rev 08.12.2020

Butane

A colorless flammable gas that is heavier than air. The term “butane” is used for any of two                 

structural isomers (n-butane or iso-butane, with unbranched and branched-chain        

respectively) or for their mixture. Occurs in light petroleum fractions.

Butane is used mainly as a fuel and as a feedstock in organic synthesis. It is applied also                 

as a propellant in aerosol sprays and may be used as an ozone-friendly refrigerant.

Mixtures of butane with propane and other hydrocarbons are referred to as LPG (liquefied             

petroleum gas).



 

5

Chemical formula

n-butane

CH3CH2CH2CH3

iso-butane

CH3CH(CH3)CH3

Molar weight

58

Relative gas density (to air)

2.0

Conversion

1 ppm = 2.38 mg/m3

Boiling point

-0.56 °C

−11.7 °C

Low explosive limit (LEL), % vol. in air

1.4* (1.6**)

1.5* (1.8**)

Upper explosive limit (UEL), % vol. in air

8.4

9.6

Odor

Gasoline-like odor

Hazards

Highly flammable.

Inhalation of butane can cause euphoria, drowsiness,

narcosis, asphyxia, cardiac arrhythmia, fluctuations in

blood pressure, and temporary memory loss, when

abused directly from a highly pressurized container, and

can result in death from asphyxiation and ventricular

fibrillation.

Exposure limits 

(NIOSH)

TWA

1900 mg/m3 /800 ppm

Not established

E2618-LEL Rev 08.12.2020

Hydrogen

A colorless, odorless, flammable gas, that is much lighter than air. Mixtures with air are              

explosive. Results from the interaction of acids, bases, and water with active metals and             

from the electrolysis of aqueous solutions. In industrial production, the main source of            

hydrogen is hydrocarbons.

 

6

Chemical formula

H2

Molar weight

2

Relative gas density (to air)

0.07

Conversion

1 ppm = 0.0818 mg/m3

Boiling point

−252.88 °C

Low explosive limit (LEL), % vol. in air

4.0

Upper explosive limit (UEL), % vol. in air

75

Odor

Odorless

Hazards

Flammable forms explosive mixtures with air.

Asphyxiant.

Exposure limits

not established

E2618-LEL Rev 08.12.2020

Methane

A colorless flammable gas, the main component of natural gas, marsh gases. Methane            

results from bacterial decomposition of plant and animal matter (landfill gas).

Methane is widely used as a fuel and chemical feedstock.

Synonyms: Marsh Gas, Natural Gas, Carbon tetrahydride, Hydrogen carbide.

 

7

Chemical formula

CH4

Molar weight

16

Relative gas density (to air)

0.55

Conversion

1 ppm = 0.65 mg/m3

Boiling point

−161.49 °C

Low explosive limit (LEL), % vol. in air

4.4* (5.0**)

Upper explosive limit (UEL), % vol. in air

15

Odor

Odorless when pure. Methane used in the kitchens

contains an odorant

Hazards

Highly flammable, mixtures with air are explosive.

Asphyxiant.

Exposure limits

not established

E2618-LEL Rev 08.12.2020

Propane

A colorless flammable gas that is heavier than air. it occurs in light petroleum fractions.

Propane is used mainly as a fuel and as a feedstock in organic synthesis. It is applied also                 

as a propellant in aerosol sprays and may be used as an ozone-friendly refrigerant.

Mixtures of propane with butane and other hydrocarbons are referred to as LPG (liquefied             

petroleum gas).



Conversion of ppm to mg/m3 is calculated for 25°C and 1 atm.

* according to new EU standards ('stirred' concentration of gas)

** according to US standard (‘still gas’ method)

 

8

Chemical formula

CH8CH2CH8

Molar weight

44

Relative gas density (to air)

1.55

Conversion

1 ppm =1.80 mg/m3

Boiling point

−42 °C

Low explosive limit (LEL), % vol. in air

1.7* (2.1**)

Upper explosive limit (UEL), % vol. in air

9.5

Odor

Odorless when pure. Commercially available propane for

fuel purposes may contain odorant (“gas smell”).

Hazards

Highly flammable, mixtures with air are explosive.

Asphyxiant. May cause dizziness, confusion, excitation

when inhaled.

Exposure limits 

(NIOSH)

TWA

1800 mg/m3 /1000 ppm

IDLH

2100 ppm [10%LEL]

E2618-LEL Rev 08.12.2020

Specifications

9

Detected gases

Acetylene, Butane, Hydrogen, Methane, Propane, etc

Sampling method

Diffusion

Sensor type

Metal oxide semiconductor

Catalytic (pellistor)

Typical detection range

0...100% LEL

Resolution / digital unit

0.1% LEL

1% LEL

Response time T90

ca. 60 s

8 s

Sensor lifetime

> 5 years

> 2 years

Calibration interval

12 months

3...6 months

Operating conditions

-30...+70 °C

-20 to +60°C

<95% RH non-condensing, 0,9...1,1 atm, Explosion-safe indoor areas,

Normal ambient oxygen level

Avoid strong mechanical shock, vibrations, or EMI

Avoid exposure to corrosive gases or silicone-containing products

NOTE! Transmitter with a catalytic type sensor is not suitable for acetylene

detection

Signal update

Every 1 second

Power supply options

11...30 VDC or 24 VAC

Power consumption

< 2 VA

Load resistance

RL < (Us - 2 V) / 22 mA for 4-20 mA

RL > 250 kOhm for 0-10 V mode

Digital interface

RS485, Modbus RTU protocol

No galvanic isolation

Analog outputs

2 × 4-20 mA / 0-10 V, user settable

Outputs assignment

OUT1 2 gas; OUT2 2 gas

Output scale width

> 10 × resolution

Recommended: 20-100% of the detection range

Cable connections

Screwless spring-loaded terminals

Enclosure

Grey ABS, wall mount, protection class IP65

Dimensions

H82 × W80 × D55 mm

CE marking

According to 2014/30/EU and 2014/35/EU, EN 50491-4-1:2012

EN 61000-6-3:2020, EN 61326-1:2013(EMC, emissions)

EN 61000-6-1:2019, EN 61000-6-2:2019(EMC, Immunity)

EN 60079-29-1:2016, EN 60079-29-2:2015 and EN 60079-29-3:2014

E2618-LEL Rev 08.12.2020

10

Other options

Remote probe

Protection IP65, default cable length 3.0 m;

max height 80 mm, max diameter 65 mm

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