Teledyne ECO-02-0227 User Manual

INSTRUCTION MANUAL

311XL SERIES

0-2 PPM Full Scale

Trace Oxygen Analyzer

D ANGER

HIGHLY TOXIC AND OR FLAMMABLE LIQUIDS OR GASES MAY BE PRESENT IN THIS MONITORING
SYSTEM.

PERSONAL PROTECTIVE EQUIPMENT MAY BE REQUIRED WHEN SERVICING THIS SYSTEM.
HAZARDOUS VOLT A GES EXIST ON CERTAIN COMPONENTS INTERNALLY WHICH MA Y PERSIST FOR
A TIME EVEN AFTER THE POWER IS TURNED OFF AND DISCONNECTED.

ONL Y A UTHORIZED PERSONNEL SHOULD CONDUCT MAINTENANCE AND/OR SER VICING. BEFORE
CONDUCTING ANY MAINTENANCE OR SERVICING CONSULT WITH AUTHORIZED SUPERVISOR/
MANAGER.

Teledyne Analytical Instruments

P/N M70255

08/14/02

ECO # 02-0227

INSTRUCTION MANUAL

FOR

TRACE OXYGEN ANALYZER

MODEL 311XL

TELEDYNE ANALYTICAL INSTRUMENTS

16830 CHESTNUT STREET

CITY OF INDUSTRY, CA 91749

TELEPHONE: [phone]
[phone]
[phone]

FAX: [phone]
[phone]

Web: www.teledyne-ai.com

WARNING

The sensor(s) used in this instrument uses electrolytes which contain substances that are
extremely harmful if touched, swallowed, or inhaled. Avoid contact with ANY fluid or powder
in or around the unit. What may appear to be plain water could contain one of these toxic
substances.

SKIN CONTACT: Flush contact area with cold water for several minutes.
Seek medical attention.

EYE CONTACT: Flush with cold water for at least 15 minutes. Seek
immediate medical attention.

IF SWALLOWED: Drink milk or milk of magnesia. Seek immediate medical
attention.

IF INHALED: Move immediately to an area of fresh air, or assist victim
to fresh air. If victim is having difficulty breathing, use
artificial respiration or administer oxygen. Seek immediate
medical attention.

TABLE OF CONTENTS

311XL SERIES

1. INTRODUCTION 1

1.1 Description 1

1.2 Method of Analysis 1

1.3 Outstanding Features 1

1.3.1 Micro-Fuel Cell 1

1.3.2 Reliable Calibration 2

1.3.3 Integral Power Supply 2

1.3.4 Accuracy and Response 3

1.3.5 Compact Packaging 3

2. SUPPORTING EQUIPMENT AND SERVICES 4

2.1 Sampling Equipment 4

2.2 Power Service 4

3. OPERATION 5

3.1 Introduction 5

3.2 Calibration 6

3.2.1 Standard (Span) Calibration Procedure 6

3.3 Positive Pressure Sampling 6

3.4 Atmospheric Pressure Sampling 7

4. MAINTENANCE 8

4.1 Battery Power Supply Services 8

4.2 Routine Maintenance 8

4.3 Cell Replacement 8

4.4 Cell Warranty 19

5. TRANSDUCTION AND TEMPERATURE COMPENSATION 10

6. LEAK TESTING 10

7. SPECIFICATION DATA 12

SPARE PARTS LIST 13

DRAWING LIST 14

APPENDIX - Effect of CO2 on B-2CXL Cell Life 15

311XL SERIES

TRACE OXYGEN ANALYZER

1. INTRODUCTION

1.1 Description: The Teledyne Analytical Instruments (TAI) Model 311XL and
311TCXL are portable, intrinsically safe trace oxygen analyzer which can be operated without
an external power source. These analyzers will be referred to as Model 311XL or 311XL Series
analyzers in this manual.

The instrument provides for trace oxygen analysis in decade steps ranging from 0-2 to 0-10,000
ppm (full scale) plus a special calibration range that encompasses the known oxygen
concentration of atmospheric air (209,000 ppm).

Sample oxygen is read from an extremely accurate integral meter whose range of measurement is
determined by the position of the range selector switch. The linear 5 inch scale (mirror equipped
to eliminate parallax) provides excellent resolution and accuracy.

Sample gas is introduced and vented via a pair of quick disconnect fittings that feature integral
shutoff valves which automatically close when the mating male fitting is withdrawn. The fittings
are an integral part of the measuring cell manifold so that internal sample passage volume is at
an absolute minimum. Sample flow control of 0.5 to 5 liters/min. must be accomplished with
accessory equipment.

1.2 Method of Analysis. The sample oxygen is measured by a unique
electrochemical transducer which functions as a fuel cell. Oxygen diffusing into the cell reacts
electro-chemically to produce an electrical current that is proportional to the oxygen
concentration in the gas phase immediately adjacent to the transducer’s sensing surface. The
linear, but minute, signal produced by the transducer from trace oxygen is amplified by a two
stage amplifier. The dual stages of amplification provide enough gain to drive meter and
thermistor controlled network utilized to compensate for the positive temperature co-efficient of
the transducer.

1.3 Outstanding Features
the Model 311XL:

1.3.1 Micro-Fuel Cell
ducer with no electrolyte to change or electrodes to clean. When the cell reaches the end of its
useful life, it is merely thrown away and replaced, as one would replace a worn out battery in a
flashlight.

. The following unique features are incorporated into

: The Micro-Fuel Cell* is a sealed electrochemical trans-

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1.3.2 Reliable Calibration. Although this instrument can be calibrated with
air, the use of a calibration gas gives better results on the lower PPM ranges. If the instrument is
exposed to high concentrations of oxygen (percent levels), it will take a significant amount of
time to purge the oxygen from the sensor and analyzer for use in the low PPM level
measurements (24 hours or longer).

1.3.3 Integral Power Supply. The differential power +/- 3.6 volts D.C.) of the
instrument amplifier is furnished by two internally mounted 750 milliampere hour nickel
cadmium batteries. Fully charged, these batteries will provide enough power to operate the
instrument continuously for a period of about 30 days. Furthermore, an overnight charge on a
three weeks duty cycle should keep the original batteries supplied usable for many years.

An integral charging circuit and a detectable power cord are provided so that the batteries may
be recharged from any 50 or 60 cycle, 100 to 115 volt, convenience outlet.

The instrument is designed to either sample or have its batteries recharged. Both operations
cannot be carried out simultaneously. TAI has deliberately interlocked the circuitry so that both
operations cannot be carried on at the same time.

Only when the selector switch is placed in the OFF position will the neon lamp on the back plate
of the Model 311XL light up to indicate power to the battery charging circuit.

* U.S. Pat. Nos. 3,767,552 and 3,668,101

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