Honeywell 705 Series User manual

Sensors Type 705
H2S Sensor and Transmitter for
Electrochemical Cells Ul Certified
Operating Instructions

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HELPING TO MAKE A SAFER WORLD
Ensure that you read and understand these operating
instructions BEFORE installing or operating any part of the
equipment.
Please pay particular attention to the Safety Warnings.
WARNINGS
1. To maintain safety standards, regular maintenance,
calibration and operation of this equipment by
qualified personnel is essential. Read and understand
this manual completely before operating or servicing.
If any further details are required which do not appear
in this manual contact Zellweger Analytics Limited or
their agent.
2. The Code of Practice regarding 'Selection, Installation
and Maintenance of Electrical Apparatus for use in
Potentially Explosive Atmospheres' must be complied
with at all times. Refer to the appropriate local or
national regulations relative to the installation site.
Elsewhere the appropriate local or national
regulations should be used.
3. Operators must be fully aware of the action to be
taken if the gas concentration exceeds an alarm
level.
CAUTION
To maintain safety standards, regular maintenance,
calibration and operation of the equipment by qualified
personnel is essential.

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IMPORTANT NOTICES
1. Zellweger Analytics Limited can take no responsibility
for installation and/or use of its equipment if this is
not done in accordance with the appropriate issue
and/or amendment of the manual.
2. The user of this manual should ensure that it is
appropriate in all details to the exact equipment to
be installed and/or operated. If in doubt, the user
should contact Zellweger Analytics Limited for advice.
3. If further details are required which do not appear in
this manual, contact Zellweger Analytics Limited or
one of their agents.
HELP US TO HELP YOU
HELPING TO MAKE A SAFER WORLD
Every effort has been made to ensure the accuracy in the
contents of our documents, however, Zellweger Analytics
Limited can assume no responsibility for any errors or
omissions in our documents or their consequences.
Zellweger Analytics Limited would greatly appreciate being
informed of any errors or omissions that may be found in the
contents of any of our documents and to this end we include
the form opposite for you to photocopy, complete and return
to us so that we may take the appropriate action.

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1. INTRODUCTION 7
1.1 General 7
1.2 Principle of Operation 8
1.3 Accessories 8
2. INSTALLATION 12
2.1 Unpacking 12
2.2 Sensor Orientation 12
2.3 Terminal Housings 12
2.4 Cable Connections 13
2.5 Fitting Sensors 14
3. FITTING ACCESSORIES 16
3.1 Collecting Cone 16
3.2 Weather Protection Housing 16
3.3 Sample Flow Housing 16
4. MAINTENANCE 18
4.1 General 18
4.2 Cleaning 18
5. CALIBRATION 19
5.1 General 19
5.2 Cross Interference From Other Gases 19
5.3 Sensor Life 19
5.4 Calibration Procedure 20
6. GASSING THE SENSOR 21
6.1 Equipment Required 21
6.2 Calibration Gassing Procedure 21
7. REPLACEMENT PARTS 23
7.1 Terminal Housings 23
7.2 Maintenance Spares 23
8. Type 705 Sensor Alternative Systems 24
9. SPECIFICATION 25
CONTENTS

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