Envent 330S-Ex User manual

Envent Engineering Ltd.

Hydrogen Sulfide Analyzer

Model 330S-Ex

Model 330SDS-Ex

User's Manual

Revision 1

21 Jan 2022

Table of Contents

INTRODUCTION ................................................................................................................................... 1

Contacting Envent Engineering Ltd .................................................................................................... 1

Canada Office: (Main)..................................................................................................................... 1

USA Office:..................................................................................................................................... 1

China Office:................................................................................................................................... 1

Warranty & Liability Statements ......................................................................................................... 2

Limitation of Warranty..................................................................................................................... 2

Disclaimer .......................................................................................................................................... 2

Key Symbols ...................................................................................................................................... 3

Warnings & Cautions.......................................................................................................................... 3

Warning & Cautions for 330S-Ex & 330SDS-Ex H2S Analyzers ...................................................... 3

Analyzer Specifications ...................................................................................................................... 6

PRINCIPLE OF OPERATION................................................................................................................ 7

Physical Reaction............................................................................................................................... 7

Analysis Cycles .................................................................................................................................. 8

Dual Sensor Analysis cycle (SDS): ............................................................................................... 10

INSTALLATION .................................................................................................................................. 11

Receiving the Analyzer..................................................................................................................... 11

Unpacking the Analyzer................................................................................................................ 11

Standard spare parts for 330S-Ex H2S analyzers: ........................................................................ 11

Installation procedure & Start-up ...................................................................................................... 12

Installation Requirements................................................................................................................. 13

Electrical Requirements ................................................................................................................ 13

Location for the System ................................................................................................................ 13

Earth Connections, Entry Specifications & Space Requirements .................................................. 14

Sample Point Selection................................................................................................................. 21

Sample inlet & sample sweep ....................................................................................................... 21

Vent line ....................................................................................................................................... 21

Sample Volume & Flow Rate ........................................................................................................ 22

Installation of Analyzer Components ................................................................................................ 23

Analog Outputs............................................................................................................................. 23

Sample Chamber.......................................................................................................................... 24

Humidifier Unit .............................................................................................................................. 26

Eductor Block ............................................................................................................................... 28

OPERATION & CONFIGURATION ..................................................................................................... 30

Analyzer Display Interface................................................................................................................ 30

CALIBRATION PROCEDURES .......................................................................................................... 32

H2S Gas Calibration ......................................................................................................................... 32

Re-zero Sensor Procedure............................................................................................................... 33

MAINTENANCE .................................................................................................................................. 35

H2S Sensing Tape Change Procedure ............................................................................................. 35

Sample Conditioning System Cleaning Procedure ........................................................................... 36

Material List .................................................................................................................................. 36

Procedure..................................................................................................................................... 36

TROUBLESHOOTING ........................................................................................................................ 38

APPENDICES ..................................................................................................................................... 48

Recommended Spare Parts List....................................................................................................... 48

Sealing Compound: For sealing fittings in Hazardous Locations ...................................................... 49

Safety Data Sheet for H2S Sensing Tape ......................................................................................... 61

List of Figures

Figure 1. H2S Analyzer Principle of Operation Diagram ......................................................................... 8

Figure 2. H2S Analysis Cycle ................................................................................................................. 9

Figure 3. Enclosure Entries & Earth Connections ................................................................................ 14

Figure 4. Space Requirements & Entry Specifications for Model 330S-Ex (No Backpan) .................... 15

Figure 5. Space Requirements & Entry Specifications for Model 330SDS-Ex (No Backpan) ............... 16

Figure 6. Space Requirements for 330S-Ex with Standard Backpan (Size may vary) .......................... 17

Figure 7. Space Requirements for 330SDS-Ex with Standard Backpan (Size may vary) ..................... 18

Figure 8. Space Requirements for 330S-Ex with Total Sulfur Option (Backpan size may vary)............ 19

Figure 9. Space Requirements for 330SDS-Ex with Total Sulfur Option (Backpan size may vary)....... 20

Figure 10. Recommended Venting for 330S-Ex (Same as the 330SDS-Ex H2S Analyzer)................... 22

Figure 11. AO 4-20 mA Output Wiring Options .................................................................................... 24

Figure 12. Sample Chamber (Exploded View) ..................................................................................... 25

Figure 13. Envent's Humidifier Unit for 330S-Ex & 330SDS................................................................. 27

Figure 14. Humidifier Unit Installed in a 330S-Ex H2S Analyzer ........................................................... 28

Figure 15. Eductor Block (Venturi Effect) ............................................................................................. 28

Figure 16. 330S-Ex or 330SDS-Ex Display.......................................................................................... 30

Figure 17. 330S-Ex & 33SDS-Ex H2S Sensing Tape Change Procedure............................................. 35

List of Tables

Table 1. 330S-Ex 330SDS-Ex H2S Analyzer Specifications .................................................................. 6

Table 2. Sample Volume and & Flow Rate........................................................................................... 22

Table 3. Aperture Strips & Ranges ...................................................................................................... 26

Table 4. Display Button Description/Function....................................................................................... 30

Table 5. Display LED Description/Function .......................................................................................... 31

Envent Engineering Ltd. Page 1 Revision 1

INTRODUCTION

This manual provides all the necessary information to install, operate and

maintain the 330S-Ex and 330SDS-Ex model H2S Analyzer units. This manual is

intended for all technical level users.

The Envent 330S-Ex and 330SDS-Ex H2S Analyzer is a uniquely rugged and

simple design that utilizes lead acetate-based detection which provides a linear

and interference-free output of H2S concentration. This analyzer can measure a

wide range of hydrogen sulfide concentrations from parts per billion (ppb)

concentrations to parts per million (ppm) concentrations. With the addition of a

dilution sample system, it can read high concentrations in percentage up to

100%. There are other options available such as the sample system for H2S

analysis in liquids or the addition of a hydrogen reaction furnace for total sulfur

measurements.

Throughout this document will be referring to the models 330S-Ex. However, the

information applies equally to the 330SDS-Ex (Dual sensor), unless otherwise

stated. To clarify, the difference between an "S" model and a "SDS" model

analyzer is the second sensor the "SDS" has to measure H2S giving it the

capability to measure H2S from two different samples at the same time.

Contacting Envent Engineering Ltd

This manual covers most of the important information the user is going to need to

install, operate and maintain the 330S-Ex & 330SDS-Ex Analyzers. If more

information is required, you can contact us at:

Canada Office: (Main)

Toll Free: 1 (877) 936 - 8368

Tel: (403) 253 - 4012

Fax: (403) 253 - 4016

Email: info@envent-eng.com

Hours of operation: Monday to Friday – From 8:00 am to 4:30 pm (Mountain

Time Zone). Offices closed on statutory holidays.

USA Office:

Tel: 1 (713) 567 - 4421

China Office:

Tel: (86) 138 - 0119 - 1148

For further information on our products and most updated manuals/product

catalog please visit: www.envent-eng.com

Envent Engineering Ltd. Page 2 Revision 1

Warranty & Liability Statements

Products manufactured and supplied by Envent Engineering Ltd unless

otherwise stated are warranted against defects in materials and workmanship for

up to 18 months from the date of shipment or 12 months from date of start-up,

whichever occurs first. During the warranty period the manufacturer will, as its

option, either repair or replace products, which prove to be defective.

The manufacturer or its representative can provide warranty service at the

buyer's facility only upon prior agreement. In all cases the buyer has the option of

returning the product for warranty service to a facility designated by the

manufacturer or its representatives. The buyer shall prepay shipping charges for

products returned to a service facility, and the manufacturer or its representatives

shall pay for return of the products to the buyer. The buyer may also be required

to pay round-trip travel expenses and labour charges at prevailing labour rates if

warranty is disqualified for reasons listed below.

Limitation of Warranty

The foregoing warranty shall not apply to defects arising from:

•Improper or inadequate maintenance by the user;

•Improper or inadequate unpacking or site preparation/installation;

•Unauthorized modification or misuse;

•Operation of the product in unfavorable environments, especially high

temperature and/or high humidity;

•Corrosive or other damaging atmospheres or otherwise outside

published specifications of analyzer.

Envent Engineering Ltd carries no responsibility for damage cause by

transportation or unpacking, unless otherwise specified in the incoterms.

Extended warranty may be available with certified start-up. Contact Envent

Engineering Ltd for details.

Envent Engineering Ltd reserves the right to change the product design and

specifications at any time without prior notice.

Disclaimer

No other warranty is expressed or implied. The manufacturer specially disclaims

the implied warranties of merchantability and fitness for a particular purpose.

The sole remedy of the buyer shall in no case exceed the purchase price of the

analyzer.

The manufacturer shall not be liable for personal injury or property damage

suffered in servicing the product. The product should not be modified or repaired

in a manner at variance with procedures established by the manufacturer.

Envent Engineering Ltd. Page 3 Revision 1

Envent Engineering Ltd is not resposable for the proper disposal of the H2S

sensing tape which contains lead acetate. It is the responsibility of the end user to

properly dispose the tape according to their local or national regulations. Envent

Engineering offers to take back used H2S sensing tape for its proper disposal if

needed, please contact us if this service is required. For more information on the

H2S sensing tape, please refer to "Safety Data Sheet for H2S Sensing Tape" on

page 61.

Key Symbols

The following symbols are used throughout this manual. They are intended to

draw attention to important information.

Description of hazards that could result in major injury or death.

Description of hazards that could result in minor injury or property damage.

Description of important information regarding safety of personal and/or property.

Caution: hot surface.

Description of useful information to help understand a concept.

Warnings & Cautions

This section covers all warnings and cautions for the 330S-Ex and 330SDS-Ex

H2S analyzers. Please read and understand all statements as they are for your

own safety when installing, operating and maintaining the analyzer(s). Some of

these statements are also noted throughout the manual when relevant.

Warning & Cautions for 330S-Ex & 330SDS-Ex H2S Analyzers

Do not disconnect equipment unless power has been switched off or area is

known to be non-hazardous.

Turn off power before servicing. Ensure breakers are off before connecting or

disconnecting power supply.

Envent Engineering Ltd. Page 4 Revision 1

Incorrect configuration of the analyzer may cause incorrect operation. Injury

and/or damage to facilities may occur. Check analyzer's functionality after

configuration changes have been made.

Substitution of components may impair intrinsic safety and suitability for Class I,

zone 1.

Electrostatic Hazard – Backpan and Certification nameplate must be cleaned

only with a damp cloth to prevent static charging hazard.

The analyzer should be mounted in an area in which it is not exposed to

vibration, excessive pressure, temperature and/or environmental variations.

Disassembly of the pressure regulator and solenoids in the field is not advised.

Consult Envent Engineering Ltd if the regulator or solenoid appears

contaminated.

Before resuming line pressure, be sure that all port connections, sample sweep

and sample conditioning system are securely installed.

All connections must be leaktight to ensure the effectiveness of the analyzer as

well as safety. The user is solely responsible for the product selection, safety and

warning requirements for the application. If the equipment is used in a manner

not specified by Envent Engineering Ltd, the protection provided by the

equipment may be impaired.

Do not use solvents, brake cleaners, soaps, detergents or rubbing alcohol to

clean up analyzer or sample system.

This unit may require a disconnect device rated 24 VDC and 5A max. It must be

protected by a circuit breaker rated 24 VDC and 5A max, and it is to be installed

in accordance with local electrical codes.

This unit may require a disconnect device rated 240 VDC and 5A max. It must be

protected by a circuit breaker rated 240 VDC and 5A max, and it is to be installed

in accordance with local electrical codes.

Envent Engineering H2S Sensing Tapes are suitable for use, if stored in the

original sealed package, for 10 years fron date of manufacture. Tapes should be

stored in a coll dry location. If the seal on the package has been broken in

storage, the H2S Sensing Tape should be discarded.

Open circuit before removing cover.

Ensure that the analyzer received is suitable for the electrical classification of the

installation site:

•The 330S-Ex & 330SDS-Ex are designed for:

II 2 G Ex db ib op is IIB+H2 T3 Gb (Check Analyzer Nameplate)

Envent Engineering Ltd. Page 5 Revision 1

Tape enclosure (blue chassis) knob has a capacitance of 119.7 µF, user must

determine suitability in the specific application.

The glass window on the XP enclosure must remain installed in order to maintain

area classification.

Seals not poured. Pour seals before energizing the circuit (See "Sealing

Compound: For sealing fittings in Hazardous Locations"on page 49 for further

details).

Ensure the setscrews provided for the XP motor box and XP electronic enclosure

window are tight and secured. This also applies for total sulfur enclosure caps.

Analyzer may utilize an optional CCS, Model 646 Series pressure switch located

on the side of the XP enclosure:

•Dual seal, MWP 500psi

•Annunciation is visible leakage from the pressure adjustment cover

(flow from this cover can indicate the possibility that a failed primary

seal condition could exist in the pressure switch).

If the 330S-Ex or the 330SDS-Ex has a total sulfur enclosure, ensure its caps are

engaged to a minimum of 12 threads.

No modifications to the flamepaths are permitted without consultation with the

controlled documentation.

Cables used in the equipment must be rated to a minimum ambient of 70 °C

Only suitably approved Ex db IIB+H2 Gb cable glands, blanking elements or

thread adapters with a service temperature rating of 0 °C to 50 °C to be used.

Maximum inlet pressure (after sample conditioning system) of 30 psig.

Repair of the flamepaths are not intended.

For IS system installation drawing (H2S-Ex-57), contact Envent Engineering.

Total Sulfur Furnace reaches a temperature of up to 900 °C internally after 1 hour

on. Do not touch external surface as it can reach up to 150 °C. Allow enclosure 1

hour after powering down the analyzer to cool down before servicing.

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