910 Series Continuous Landfill

& Bio-Gas Analyzers

Description, Installation, and

Preventative Maintenance

Recommendations

Prepared by:

David Sheasby, NOVA Technical Sales Department

Introduction

For over 30 years, Nova Analytical Systems,

Inc. has been designing and

manufacturing gas analyzers and

sample conditioning equipment for

industrial applications.

• Landfill and Bio-Gas applications are a

key strength of NOVA’s product line.

Introduction

NOVA 910 Series Landfill & Bio-Gas

Analyzers offer several significant

features / benefits:

• Analysis of methane, carbon dioxide,

oxygen, hydrogen sulfide, & BTU

calculation all available.

• Continuous sample moisture removal

• Isolated 4-20mA outputs, Low Flow

alarm, electrical surge protection

• Leak-free and corrosion-resistant

stainless steel hard tubing used to

handle sample gas

• Durable cabinet for outdoor mounting

Overview

Most NOVA 910 Series Landfill & Bio-Gas

Analyzers consist of the following three

basic sections:

1. Sample extraction and filtration.

2. Sample conditioning system to eliminate

interferences and corrosive constituents. (mounted in the same enclosure as the analyzer)

3. The gas analyzer which measures and

displays the gas analysis data.

Sample Extraction

Particulate pre-filter must be mounted at or

near the sample extraction point from

main process pipeline

• The sample may be extracted from the

pipeline before or after a blower

• Simply inform your NOVA representative

of the location and pressure of your

sample point, and a suitable

configuration will be provided to you.

Sample Conditioning

• The 910 Series has a built-in pump

included. This will pull the sample to the

analyzer through the pre-filter. (top)

• This analyzer also has a built-in

moisture removal system that prevents

condensate from reaching the sensors

and fouling the analysis. (far right)

• Temperature fluctuations hamper

accurate analysis - all sensors are

mounted inside of a separate heated

enclosure within the main cabinet to

provide maximum analytical stability.

(left)

Cabinet Features

• For landfills that have seasonal cold

temperatures (below 32°F or 0°C), a

Cold Weather Package is available. (top)

• For landfills that have seasonal hot and

cold climate variations, cabinet temp-

control is available (above 120°F / 48°C

and below 32°F / 0°C). (left)

• Hazardous Area Purge Kits are available

for hazardous classified areas. (far right)

Installation

Correct installation is not too difficult, but is

critical to proper analyzer functionality.

• Mount analyzer to flat vertical surface

using mounting brackets supplied. (top)

• Connect power, alarms, and 4-20mA

outputs to clearly marked terminal

blocks. (far right)

• Connect sample lines, vent lines, and

calibration gas lines to clearly marked

fittings on side of analyzer. (left)

(Detailed installation instructions are provided in

your analyzer manual.)

System Maintenance

• The instruction manual will contain

detailed information on how to start up

and operate your analyzer after

installation.

• After operating your analyzer, it is

important to implement a maintenance

plan.

• Proper analyzer maintenance will

ensure operator safety and stable

analytical data.

Maintenance – Sample

Maintenance primarily consists of checking

& changing filters

• Internal filter should be changed yearly

or when 1 LPM of sample gas cannot be

achieved

• Pre-filter element should be changed

every 6 months or when 1 LPM of

sample gas flow cannot be achieved

• Cabinet filter should be changed every 2

years or if flow is less than 0.5 LPM

Maintenance - Front Panel

• Check LCD displays if faded or not

functioning

• Check switches and potentiometers as

needed

• Replace red LED lights if they fail to

illuminate during alarm conditions

• Replace fuse when blown

(Front panel appearance and maintenance may vary

depending on model & features ordered. For e.g.

auto-cal units have touch-screen display instead of

individual LCD’s and potentiometers.)

Maintenance - Interior

• Moisture removal system – check for

adequate pressure, check for leaks or

stuck solenoid valves.

• Sample pump – every 3 years or when

less than 0.5 LPM max flow can be

achieved with sample line disconnected

and all new filters installed

Maintenance Summary

In NOVA’s experience, the following steps

performed on a regular basis will

contribute to longest life and best

analytical performance:

• Check all filters and replace if necessary

• Calibrate analyzer on a regular basis

and check that calibration sequence

performs normally

• Check Zero & Span drift regularly

• Check for adequate flow rates

• Periodically (and carefully) check for

leaks in sample tubing throughout

analyzer using soapy water or leak

check fluid

Conclusion

• NOVA 900 Series analyzers are durable

and provide reliable data.

• Yet, they are constructed in a simple,

modular way to allow the customer to

operate and maintain them easily.

• With numerous installations worldwide,

NOVA equipment has established itself

as the best choice for a reasonable

price.

• For your gas analysis needs, please feel

free to talk to a NOVA representative

today.

Thank you for considering

NOVA