Teledyne MD300 User Manual

Portable Oxygen Monitor

P/N M/AD/MD300

06-23-2010

OPERATING & SERVICE INSTRUCTIONS FOR

AD300

PORTABLE OXYGEN ANALYZER

MD300

PORTABLE OXYGEN MONITOR

TYPE B EQUIPMENT: Equipment providing a particular degree

of protection against electric shock,
particularly regarding—

• Allowable LEAKAGE CURRENT

• Reliability of the protective earth

connection (if present).

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AD300/MD300

Copyright © 2010 Teledyne Analytical Instruments
All Rights Reserved

No part of this manual may be reproduced, transmitted, transcribed, stored in a
retrieval system, or translated into any other language or computer language in whole
or in part, in any form or by any means, whether it be electronic, mechanical, optical,
manual, or otherwise, without prior written consent of Teledyne Instruments,
Analytical Instruments, 16830 Chestnut Street, City of Industry, CA 91749-1580

FCC Statement

This equipment generates and uses radio frequency energy, and if not installed and
used in strict accordance with the manufacturer's instruction manual, may cause
interference to radio and TV communications. It has been type-tested and certified to
comply with the limits for a Class A, and exceeds limits for a Class B, computing
device pursuant to Subpart J of FCC Rules, which are designed to provide reasonable
protection against such interference when installed in a commercial and residential
environment. Operation of this equipment in a residential area may cause interference,
in which case the user, at his own expense, will be required to take whatever measures
may be required to correct the interference.

Note: The above statement is required by the FCC for any device

that incorporates microprocessors.

Warranty

Teledyne warrants that the goods are free from defects of material and of construction
for a period of 2 years from the date of shipment from Teledyne. The Class R-17S
Micro-Fuel Cell is warranted for two years from the date of shipment from Teledyne.
The liability of Teledyne if any; shall be limited solely to the replacement and repair of
the goods and shall not include shipping costs or other incidental damages as defined in
Section 2-715 of the U.S. Uniform Commercial Code.

This warranty is null and void if any goods are subjected to misuse, negligence,
accident, or repairs other than those performed by Teledyne or an authorized service
center.

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Portable Oxygen Monitor

About This Manual

The AD300/MD300 Operator's Manual provides both introductory
and detailed information for configuring and operating these
instruments. The manual takes you from the time you unpack the
instrument until you complete the first gas analysis. The bulk of the
manual contains operating procedures and information. There are also
cautions, warnings, and guidelines to ensure that your monitor operates
normally and to its full potential. A troubleshooting section is available
to assist you with common problems and a complete product
specifications and spare parts list is included as an appendix.

A Quick start manual is also supplied which provides the minimum
information you need to use the instrument immediately.

Chapter 1: An introduction to the monitor and its components,

features and applications

Chapter 2: Step-by-step set-up procedures and information
Chapter 3: A guide for daily operational maintenance and

troubleshooting

Appendix: Specifications and available spare part options for the

monitor, and detailed application considerations to aid in
troubleshooting, etc.

How To Use This Manual

This manual is designed to walk you through the initial set-up of the
AD300 Portable Oxygen Analyzer and MD300 Portable Oxygen Monitors. It
also serves as a quick reference guide to help you with specific questions or
operating problems.

Before turning the instrument on, you are advised to read the safety
information on the next few pages and the information found in
Chapters 1 and 2. These Chapters acquaint the user with the instruments
use and operation before placing it into operation.

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AD300/MD300

Safety Messages

Your safety and the safety of others are very important. Please

carefully read the following safety messages.

Safety message are indented to alert the user of potential hazards.
Each safety message is associated with a safety alert symbol. These
symbols are found in the manual and on the instrument. The definition
of these symbols is described below:

CAUTION: Refer to the instructions for details on the
specific danger. These caution symbols warn of specific
procedures, which if not followed could cause bodily Injury,
and/or damage the instrument.

WARNING: This symbol is use to alert the operator of a
condition that could cause bodily harm.

NOTE: Additional information and comments regarding a
specific component or procedure are highlighted in the form
of a note.

CAUTION: THE MONITOR SHOULD ONLY BE USED FOR THE

PURPOSE AND IN THE MANNER DESCRIBED IN
THIS MANUAL.

IF YOU USE THE ANALYZER IN A MANNER OTHER
THAN THAT FOR WHICH IT WAS INTENDED,
UNPREDICTABLE BEHAVIOR COULD RESULT
POSSIBLY ACCOMPANIED WITH HAZARDOUS
CONSEQUENCES.

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Portable Oxygen Monitor

Table of Contents

Safety Messages .......................................................................... iv

List of Figures .............................................................................. vii

List of Tables .............................................................................. viii

Introduction ................................................................................... 9

1.1 Features 11

1.2 Options 11

1.3 The R17S Sensor—How it works 12

Operation ..................................................................................... 13

2.1 Setup 13

2.1.1 Sensor Installation or Replacement 13

2.1.2 Mounting 15

2.1.2.1 V-Mount Adapter Installation 15

2.1.2.2 Universal Mounting Clamp Installation 16

2.1.3 Battery Installation 16

2.1.4 Calibration 18

2.1.5 Alarms (MD300 only) 20

2.1.6 Output 0-1 VDC or RS232 21

2.2 Use 22

2.2.1 Gas Sampling 22

2.3 Gas Sampling/Sensor Issues 24

2.3.1 Temperature 24

2.3.2 Pressure 25

2.3.3 Humidity 25

2.3.4 Discrepancy in Readings 26

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AD300/MD300

2.4 Do’s and Don’ts 27

Service Manual ............................................................................ 29

3.1 General Service Information 29

3.2 Overall Maintenance 29

3.3 Battery Maintenance 29

3.4 Sensor Maintenance 30

3.5 Gas Sampling 30

3.5.1 Discrepancy in Readings 30

3.6 Troubleshooting 31

3.7 Watchdog 34

3.8 Other Problems with the Instrument 36

3.9 Return Authorization for Service 36

Appendix ...................................................................................... 37

A.1 Specifications 37
A.2 Spare Parts List 38
A.3 Optional Accessories 38

Index ....................................................Error! Bookmark not defined.

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Portable Oxygen Monitor

List of Figures

Figure 1-1: MD300 Front View ........................................................ 9

Figure 1-2: AD300 Front View ....................................................... 10

Figure 2-1: Installing the R17S Sensor .......................................... 14

Figure 2-2: Sensor Cable Connection to Monitor ......................... 14

Figure 2-3: Mounting the Sensor in the Tee Adapter ..................... 15

Figure 2-4: V-Mount Adapter Installation ....................................... 16

Figure 2-5: Brass Insert for Universal Mounting Clamp ................. 16

Figure 2-6: Installing Batteries ....................................................... 17

Figure 2-7: Calibration Sequence ................................................ 178

Figure 2-8: Setting the Alarms (MD300) ........................................ 20

Figure 2-9: 0-1 VDC or RS 232 Digital Output Port ....................... 22

Figure 2-10: Low Pressure Gas Sampling ..................................... 23

Figure 2-11: High Pressure Gas Sampling .................................... 24

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AD300/MD300

List of Tables

Table 3-1 Troubleshooting ............................................................ 31

Table 3-2 Error Codes ................................................................... 35

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Oxygen Analyzer Introduction

Introduction

The Teledyne Analytical Instruments AD300 Oxygen Analyzer
here after referred to as AD300 and MD300 Oxygen Monitors with
alarms here after referred to as MD300 are portable instruments that
provide fast and accurate oxygen monitoring. In addition, the model
MD300 incorporates an audio/visual alarm capability. These instruments
are designed to monitor up to 100% oxygen concentration in breathable
gas mixtures. Because they are microprocessor-based, the AD/MD300
series have a unique combination of features that make them very easy
to use. The operator interface is accomplished through a series of
buttons located conveniently on the front face of the instrument. The
MD300 front face interface is shown in Figure 1-1. The AD300 is
similar but without the battery and alarm test buttons is shown in Figure
1-2.

Figure 1-1: MD300 Front View

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Introduction AD300/MD300

Figure 1-2: AD300 Front View

The LCD display consists of up to 3.5 characters plus a decimal
point indicator capable of displaying up to 105%. (See Section 1.2
Options for alternate display configuration). An integral battery life

indicator is displayed continuously on the AD300 and ―on demand‖

with the MD300.

The instrument is powered by three AA alkaline batteries and is
designed to operate for 2000 hours in Non-alarm State.

Oxygen analysis is linear across the single range of 0-100% using
Teledyne’s class R17S oxygen sensor. A unique sensor failure alarm is
incorporated which warns the user if the sensor signal is lost or low.
When this occurs, the √ SENSOR display flashes. The alarm buzzer can
be silenced by pressing the ALARM SILENCE key. If the alarm
condition is not corrected within 115 seconds the alarm buzzer will
reactivate.

The MD300 unit incorporates a dual concentration alarm with
individual user-defined set points. The set points are displayed on the
lower portion of the LCD display with the low alarm set point appearing
at the lower left and the high alarm appearing on the lower right of the
display. The alarm circuitry provides both an audible and visual alarm.

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Oxygen Analyzer Introduction

1.1 Features

The AD300/MD300 are rugged, versatile instruments capable of
rapidly measuring the oxygen content of breathing gases commonly used
for diving purposes. Gas analysis is accurate to within ±2% of full scale
over the operating range of 0-100% at constant temperature and pressure.

The following features are standard on the AD300 and MD300
instruments:

Large easy to read 3 1/2 digit LCD display (see options)
Automatic LCD back lighting upon key press
Microprocessor controlled
Up/Down front panel controls
Sensor fail/disconnect alarm indicator (audible and visual)
Alarm silence button
2000 operating hours from 3 AA alkaline batteries
Battery status indicator
Rugged high impact ABS construction
Splash resistant case.
Long life (36 months in air) class R17S sensor
VDC digital output (optional RS-232)

The MD300 features include the above plus:

User defined set point controlled concentration alarms
Battery test function

1.2 Options

The following instrument options are available for both the AD300
and MD300 units:

A-Option—3-digit LCD display instead of 3 1/2 digit
B-Option—RS 232 digital output instead of 0-1VDC

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Introduction AD300/MD300

Note: Contact the factory for retrofitting an existing instrument for

3 digit LCD display. For RS-232 reconfiguration, see
Section 2.1.6.

In addition to the above instrument configuration options, the

following optional equipment is available for your instrument:

DIN flow restrictor for sampling gas cylinder directly

P/N (B 75401)
Universal Pole Mounting Clamp (P/N CP 2343)
V-Mount Wall Adapter P/N B 647)
0-1 VDC Interface Cable (P/NB-75554)
RS 232 Interface Cable (P/N B-75555)

1.3 The R17S Sensor—How it works

The AD300/MD300 uses Teledyne Analytical Instruments Patented
R17S disposable oxygen sensor. The sensor is made up of a sensing
cathode and anode (fuel) immersed in electrolyte and packaged in a
small plastic container. Oxygen entering the sensor reacts with the anode
and a proportional current is collected at the sensing cathode. This
current is sent to the electronics where it is converted into a digital
signal and displayed on the LCD Screen.

A flow diverter is supplied with each R17S sensor for use with the

blue ―T‖ adapter. The flow diverter threads onto the end of the sensor

and facilitates the transport of gas into the sensor.

The diverter should be removed for ambient air sampling such as a
diving bell.

CAUTION: REMOVE AND SAVE THE DIVERTER WHEN THE

SENSOR IS USED IN CONFINED VOLUME
APPLICATIONS.

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