AMI 201LC Manuel utilisateur

AMI

Oxygen Analyzer Manual

Model 201LC

AMI, Costa Mesa, CA

AMI Analyzer Manual Contents •

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Contents

Preface 1

The AMI story 1

Caution 1

Address 1

Model 201LC Series Oxygen Analyzer 2

Introduction 2

Features: 2

Oxygen sensor: 3

Sensor Warranty: 3

Instrument Warranty: 3

Installation and Operation 4

Receiving the analyzer 4

Installation. 4

Location: 4

Connect gas and power lines: 5

Interconnections: 6

Alarm connections: 6

Output connections: 6

Serial connections: 6

Sample Handling: 7

Sensor Installation: 8

Operation 8

General Description: 8

Front Panel Controls: 8

Output Ranges 8

View Output Range 8

Change Output Range 9

Alarm Set Points 9

View Alarm Set Points 9

Change Alarm Set Points 9

AMI Analyzer Manual Contents •

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Alarm Hold Off 9

Calibration (Spanning) 9

Verify Span Factor: 11

Read the Temperature: 11

Alarm Functionality: 11

Maintenance and troubleshooting 12

Maintenance: 12

Periodic Calibration: 12

Sensor Replacement: 12

Sensor replacement cautions: 13

Sensor replacement procedure: 14

O rings 14

Troubleshooting 15

All oxygen applications 15

Specifications and Disclaimer 17

Specifications: 17

Disclaimer 17

Material safety data sheets (MSDS) 18

Sensor type P2, T1 18

Product Identification 18

Physical and chemical data 18

Fire and explosion hazard data 19

Reactivity data 19

Health hazard data 20

Emergency and first aid procedures 21

Handling information 21

Sensor type T2 22

Product Identification 22

Physical and chemical data 22

Physical hazards 23

Health hazard data 24

Emergency and first aid procedures 24

Handling information 25

Glossary of Terms 26

Index 28

AMI Analyzer Manual Preface •

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Preface

The AMI story

The AMI series of analyzers provide the latest in high-definition oxygen analysis. The series includes trace (ppm) and

percent models in several configurations. All of them share the same basic design approach, using AMI-manufactured

oxygen sensors and advanced high definition electronics for noise and interference free performance. Several aspects

of the design are the subject of patents, number 5,728,289 and 6,675,629; the sensors have a patent pending.

AMI specializes in oxygen analysis only , so as not to dilute its expertise by trying to cover too many other fields. As a

result AMI analyzers are more advanced and have more features than competitive models.

Every effort is made to ensure that AMI products provide reliable, effective performance. However there are many

pitfalls in achieving correct oxygen analysis, particularly at low ppm levels, and AMI stands ready to provide a

complete solution to the analysis problem, from sample system design to on-site troubleshooting and problem analysis.

Please feel free to call AMI for help should your results not meet your expectations.

Caution

Read and understand this manual fully before attempting to use the instrument. In particular understand the hazards

associated with using flammable or poisonous gases, and associated with the contents of the sensor used.

Address

Advanced Micro Instruments

225 Paularino Avenue

Costa Mesa, CA 92626

(714) 848-5533

www.AMIO2.com

Last Revised: 08/31/2018

AMI Analyzer Manual Model 201LC Series Oxygen Analyzer •

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Model 201LC Series Oxygen Analyzer

Introduction

The Advanced Micro Instrument Oxygen Analyzer Model 201LC provides the latest in low-cost high precision oxygen

measurement.

This manual covers software version 1.0.

Features:

•Compact size

•Unique patented cell block

•Auto-ranging display with user-selectable output

range

•Front panel sensor access

•Optional air or span gas calibration, no zero gases

required

•Virtually unaffected by hydrocarbons or other

oxidizable gases

•High accuracy and fast response

•Large liquid crystal display

•Backed by a two year warranty (excluding sensor)

•Standard isolated 4-20mA output

•Two fully adjustable alarm relay contact closures

24VDC/230VAC 5A.

AMI Analyzer Manual Model 201LC Series Oxygen Analyzer •

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Oxygen sensor:

AMI manufactures its own electrochemical sensor. It measures the concentration of oxygen in a gas stream, using an

oxygen specific chemistry. It generates an output current in proportion to the amount of oxygen present, and has zero

output in the absence of oxygen, thus avoiding any requirement to zero the analyzer. The cell is linear throughout its

range. The span calibration may be performed using standard span gases or ambient air. Unlike competitive sensors,

the AMI sensor is made using a high capacity metallic body that provides long life with about twice the active

ingredients of conventional sensors, but without compromised come-down time.

Sensor Warranty:

The sensor is warranted to operate for a period determined by its class. If the sensor ceases to operate correctly before

this time has elapsed, contact AMI for a return authorization for evaluation. If there is any evidence of defective

material or workmanship the sensor will be replaced free of charge.

NOTE: Any evidence of abuse or physical damage, such as a torn membrane, will void the warranty.

Instrument Warranty:

Any failure of material or workmanship will be repaired free of charge for a period of two years from the original

purchase (shipping date) of the instrument. AMI will also pay for one way shipment (back to the user).

This warranty does not cover the sensor, which is covered by its own warranty (see above).

Any indication of abuse or tampering will void the warranty.

AMI Analyzer Manual Installation and Operation •

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Installation and Operation

Receiving the analyzer

When you receive the instrument, check the package for evidence of damage and if any is found, contact the shipper.

Do not install the sensor until the analyzer is completely installed, the gas lines are plumbed and the electrical

connections are all made; and sample or a suitable low oxygen level gas such as nitrogen or a low level span gas is

ready to flow into it.

Installation.

Location:

The unit is designed to be mounted in a panel in a general purpose area. It should be mounted at a suitable viewing

level. Refer to the drawing (figure 1) showing the analyzer dimensions. It is not suitable for use in a hazardous area or

with flammable gases.

Although the unit is RFI protected, do not to mount it close to sources of electrical interference such as large

transformers, motor start contactors, relays etc. Also avoid subjecting it to significant vibration.

AMI Analyzer Manual Installation and Operation •

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Figure 1. Outline and Cut Out Drawing

Connect gas and power lines:

Do not install the sensor until the gas lines have been connected and the electrical connections made.

Install the unit, and connect the sample gas lines, power and appropriate alarm and output connections. Connect the

sample gas line to the fitting on the rear panel using the ¼” compression fittings provided, and the exhaust line to a

suitable vent.

Sample gas:

The sample gas inlet pressure should be between 1-40psig.

Span gas:

Span gas (if desired) must be provided by a user-supplied valve.

Exhaust:

The exhaust line may be left open, or vented to a suitable vent. If used with a scavenging system, use a large diameter

pipe (for example, ½” pipe) as the input to the scavenging system, and allow the ¼” vent to terminate a little way

inside this larger line without sealing it. The scavenging system will then draw in room air along with the sample,

while leaving the exhaust at atmospheric pressure.

Power connections:

The 201LC is designed to be operated from a 24V power supply only. Use a suitable wall adapter, or other kind of

stable DC power supply. Make sure the ground is connected to a real ground – otherwise you may experience

8.60

3.005.05

9.00

7.92

4.81

Ø0.21

X 4

Analyzer case outline (dashed) Cut out Front panel outline

AMI Analyzer Manual Installation and Operation •

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excessive noise and RFI interference.

Interconnections:

Figure 2. Back panel of the 201LC.

Alarm connections:

The alarm connections are single pole double throw relays, i.e. Form C contacts. They are normally preset to operate

as high alarms, failsafe, with no alarm delay, though they can be supplied with other settings. By failsafe is meant that

the relays are powered when NOT in alarm, so that if power fails, they indicate an alarm condition. The contacts can

handle AC or DC voltages, and can carry up to 5A of current for a resistive load. Inductive loads such as solenoid

valves should be “snubbed” – we suggest that you connect diodes or Zener diodes or “Transzorbs” directly across them

to absorb the inductive spike. Do not connect them across the relay terminals on the analyzer, since the resultant

current loop will transmit a lot of RFI that could upset sensitive devices nearby.

Output connections:

This unit is equipped with an isolated 4-20mA output. It is capable of driving a 600 Ohm load and will saturate at

more than 125% of the nominal full scale range.

Serial connections:

No serial connection is provided on this analyzer.

AMI Analyzer Manual Installation and Operation •

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Sample Handling:

Figure 3 Flow Schematic of the 201LC

The analyzer expects to get a sample of gas at a pressure between 1 and 40psig. A built-in needle valve and flowmeter

allow the user to control flow to 1SCFH with any pressure within this range. Higher pressure applications, or varying

pressure applications, will need a regulator to control pressure. The analyzer is not sensitive to flow changes between

about 0.2SCFH and 5 SCFH, but it is sensitive to back pressure changes (changes in exhaust pressure).

The flowmeter is mounted on the exhaust so that the oxygen reading is not affected by potential leaks around the

flowmeter tube.

Sensor

Flow

Meter

Needle

Valve Cell block

2001LC

Sample

Exhaust

Table des matières

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