Evikon PluraSens E2638 Series Manuale utente



PluraSens®



Solvent Vapor Detector-Transmitter

E2638-PID



User Manual



E2638-PID Rev 10.03.2021
Table of contents
Acetone 4
Benzene 5
Ethanol 6
Ethyl acetate 7
Toluene 8
Xylene 9
Specifications 10
Product description 12
Safety requirements 12
Operating conditions 13
Installation guidelines 13
Mounting dimensions 14
Sensor probe handling 15
Gas sensor replacement procedures 15
Electrical connections 16
Operation 18
PID (photoionization detector) technology 19
Properties of VOC: ionization energy, the correction factor 19
Calibration and maintenance 28
Delivery set 32
Order code for E2638-PID options 32
Configuring 33
Return to default settings 33
Modbus RTU Communication 34
RS485 communication interface 34
2

E2638-PID Rev 10.03.2021

Communication parameters 34

Modbus holding registers 34

Warranty 39

Manufacturer contacts 39

 

3

E2638-PID Rev 10.03.2021

Acetone

A colorless organic solvent with a characteristic pungent odor that is volatile and            

flammable with the chemical formula (CH3)2CO.

Synonyms/Trade Names: Dimethyl ketone, Ketone propane, 2-Propanone.

 

4

Chemical formula

(CH3)2CO

Molar weight

58

Relative gas density (to air)

2.0

Conversion*

1 ppm = 2.38 mg/m3

Boiling point

56.11 °C

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

2.5

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

12.8

Odor

Characteristic pungent smell

Hazards

Highly flammable.

Slightly toxic in normal use. Irritant causing mild skin

irritation and moderate to severe eye irritation. At high

vapor concentrations, it may depress the CNS.

Exposure limits

8 hours

(2000/39/EC)

1900 mg/m3 / 500 ppm

NIOSH REL TWA

590 mg/m3 /250 ppm

IDLH (NIOSH)

2500 ppm [10%LEL]

E2638-PID Rev 10.03.2021

Benzene

A colorless liquid with an aromatic odor that is highly flammable with the molecular             

formula C6H6.

Synonyms/Trade Names: Benzol, Phenyl hydride.



 

5

Chemical formula

C6H6 

Molar weight

78

Relative gas density (to air)

2.69

Conversion*

1 ppm = 3.19 mg/m3

Boiling point

80 °C

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

1.2

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

7.8

Odor

Hyacinth-like odor

Hazards

Highly flammable.

Irritant. Carcinogen.

May cause dizziness; headache, nausea, staggering

gait; anorexia, lassitude.

Target organs: eyes, skin, respiratory system, blood,

central nervous system, bone marrow.

Exposure limits

(NIOSH REL)

Ca TWA

0.319 mg/m3 /0.1 ppm

STEL

15 minutes

1 ppm

Ca IDLH

500 ppm

E2638-PID Rev 10.03.2021

Ethanol

A clear colorless liquid with a faintly sweet odor and pungent taste.

Synonyms/Trade Names: ethyl, alcohol.

 

6

Chemical formula

CH3CH2OH

Molar weight

46

Relative gas density (to air)

1,59

Conversion*

1 ppm = 1.89 mg/m3

Boiling point

78.37°C

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

3 - 3.3

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

19

Odor

The characteristic smell of alcohol

Hazards

Highly flammable.

Gas/air mixtures are explosive.

Inhalation of vapors leads to cough, headache, fatigue,

and drowsiness. High concentrations may damage the

fetus. Repeated high exposure may affect the liver and

the nervous system.

Exposure limits 

according to 

Commission

Directive 2006/15/EC

TWA

8 hours

1210 mg/m3 / 1000 ppm

STEL

15 minutes

-

E2638-PID Rev 10.03.2021

Ethyl acetate

A colorless organic compound with a sweet pear-like smell that is highly flammable.

Synonyms/Trade Names: ethyl ester, acetic ester, EA, EtOAc.



 

7

Chemical formula

C4H8O2

Molar weight

88

Conversion*

1 ppm = 3.60 mg/m3

Boiling point

77.1 °C

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

in air

2

Upper explosive limit (UEL), %    

vol. in air

11.5

Odor

Sweet “pear” smell

Hazards

Flammable.

Short-term exposure to high levels of ethyl acetate results first in

irritation of the eyes, nose, and throat, followed by headache,

nausea, vomiting, sleepiness, and unconsciousness.

Exposure limits 

(NIOSH)

TWA

8 hours

1400 mg/m3 /400 ppm

IDLH

2000 ppm [10%LEL]

E2638-PID Rev 10.03.2021

Toluene

A clear, colorless liquid with a sweet smell that is highly flammable.

Synonyms/Trade Names: methylbenzene, phenylmethane.

 

8

Chemical formula

C6H5CH3 

Molar weight

92

Conversion*

1 ppm = 3.77 mg/m3

Boiling point

110.7°C

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

in air

1.1 - 1.27

Upper explosive limit (UEL), %    

vol. in air

6.75–7.1

Odor

Characteristic “chemical” smell

Hazards

Highly flammable.

Gas/air mixtures are explosive.

Inhalation possible effects: irritation eyes, nose; lassitude

(weakness, exhaustion), confusion, euphoria, dizziness,

headache; dilated pupils, lacrimation (discharge of tears); anxiety,

muscle fatigue, insomnia; paraesthesia; dermatitis; liver, kidney

damage

Exposure limits 

according to 

Commission

Directive

2006/15/EC

TWA

192 mg/mm3 / 50 ppm

STEL

384 mg/mm3 / 100 ppm

E2638-PID Rev 10.03.2021

Xylene

A colorless, flammable liquid with a chemical smell. Xylenes are produced by the            

methylation of toluene and benzene.

The term is used for any of three isomers of dimethylbenzene, or a combination thereof.

Synonyms/Trade Names: xylol, dimethylbenzene.



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

 

9

Chemical formula

C6H4(CH3)2

Isomers



ortho-xylene  meta-xylene  para-xylene

Molar weight

106

Conversion*

1 ppm = 4.34 mg/m3

Boiling point

144.4 °C

139 °C

138.35 °C

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

in air

0.9 - 1.1

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

in air

6.0–7.0

Odor

Characteristic “chemical” smell

Hazards

Flammable.

Inhaling can cause dizziness, headache, drowsiness, and nausea.

Exposure limits 

according to 

Commission

Directive

2000/39/EC

TWA

8 hours

221 mg/mm3 / 50 ppm

STEL

15 minutes

442 mg/mm3 / 100 ppm

E2638-PID Rev 10.03.2021

Specifications

10

Detected gases

VOCs with ionisation potential < 10.6 eV

Sampling method

Diffusion

Sensor type

Photoionization detector

Calibration

Isobutylene

Order code

E2608-PID-40

E2608-PID-200

Typical detection

ranges

0...40 ppm (isobutylene)

0...200 ppm (isobutylene)

Resolution / digital unit

1 ppb

1 ppm

Response time T90

< 3 s

Sensor lifetime

5 years

Calibration interval

Monthly or more frequently depending on operating conditions

Signal update

Every 1 second

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

Power supply

11...30 VDC,

24 VAC or 90...265 VAC as options

Power consumption

< 2 VA

Analog outputs

2 × 4-20 mA / 0-10 V, user settable

Outputs assignment

OUT1 gas; OUT2 gas

NOTE! for LCD version only output 1 is available

Output scale width

> 10 × resolution

Recommended: 20-100% of the detection range

Relay outputs

2 × SPST, max 5 A, 30 VDC / 250 VAC

Alarm setpoints

Determined by the user within 5-95% of the detection range

Cable connections

Screwless spring-loaded terminals

Enclosure

Grey ABS, wall mount, protection class IP65

Dimensions

H90 × W145 × D55 mm

(overall dimensions H140 × W145 × D55 mm)

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