Gas High and High-High Alarms
Part 17997
Rev. 6, March 2011
10-9
10.4.1 Alarm Parameters Setting
10.4.1.1
Gas Level
The gas level alarm uses the following parameters:
•
GasAlr H
and
GasAlr HH
: Gas High and High-High alarm set points.
•
GasAlr Delay
: The gas alarms delay determines the period of time during which the gas
level must exceed the gas High and High-High alarm set points in order to trigger the
alarm. Accordingly, the gas level must get below the alarm set point for the same amount
of time in order to cancel the alarm.
Before setting these alarm set points, the readings of the Hydran 201
i
System should be
monitored over a minimum period of two weeks. A simple method to monitor this value is
to consult the Hydran 201T
i
’s historic data files using its keypad (see Section 4.5.1 on
page 4-12) or a host computer running the Hydran Host software.
Follow these rules:
• Adjust the High set point above the highest reading that was obtained.
• Adjust it low enough to detect the earliest sign of an abnormal increase of gas.
• But set it at a value high enough to minimize unnecessary alarms.
Table 10-4 on page 10-10 contains
suggested
guidelines for setting the
gas level High
alarm condition
, according to the maximum reading obtained during the monitoring period.
CAUTION
WARNING
This Chapter contains examples of how to set the gas alarm
parameters of the Hydran 201i System. The values used are
fictitious and do not correspond to any standard. General Electric
Canada does not suggest nor recommend specific alarm set points.
It is solely the responsibility of the user to determine the appropriate
settings.
Содержание Hydran 201i
Страница 1: ...GE Energy Services Digital Energy Hydran Instruction Manual 201i System ...
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Страница 36: ...Chapter 1 Introduction 1 10 Rev 6 March 2011 Part 17997 PAGE LEFT INTENTIONALLY BLANK ...
Страница 72: ...Chapter 3 Hydran 201Ci Controllers 3 16 Rev 6 March 2011 Part 17997 PAGE LEFT INTENTIONALLY BLANK ...
Страница 114: ...Chapter 5 Before Installation 5 16 Rev 6 March 2011 Part 17997 PAGE LEFT INTENTIONALLY BLANK ...
Страница 143: ...Installation Part 17997 Rev 6 March 2011 6 29 Figure 6 9 Installing the CPU Module ...
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Страница 190: ...Chapter 9 Communications and Networking 9 14 Rev 6 March 2011 Part 17997 PAGE LEFT INTENTIONALLY BLANK ...
Страница 216: ...Chapter 11 Operating the Hydran 201i System 11 8 Rev 6 March 2011 Part 17997 PAGE LEFT INTENTIONALLY BLANK ...
Страница 236: ...Chapter 12 Troubleshooting 12 20 Rev 6 March 2011 Part 17997 PAGE LEFT INTENTIONALLY BLANK ...
Страница 244: ...Chapter 13 Maintenance 13 8 Rev 6 March 2011 Part 17997 PAGE LEFT INTENTIONALLY BLANK ...
Страница 254: ...Appendix B Mechanical Drawings B 2 Rev 6 March 2011 Part 17997 Figure B 3 1 5 In Adaptor ...
Страница 255: ...Hydran 201Ti Intelligent Transmitter Part 17997 Rev 6 March 2011 B 3 Figure B 4 1 In Adaptor ...
Страница 262: ...Appendix C Functional Block Diagrams C 4 Rev 6 March 2011 Part 17997 PAGE LEFT INTENTIONALLY BLANK ...
Страница 282: ...Appendix F Default Values of the Parameters F 4 Rev 6 March 2011 Part 17997 PAGE LEFT INTENTIONALLY BLANK ...
Страница 284: ...Appendix G Unit Conversions G 2 Rev 6 March 2011 Part 17997 PAGE LEFT INTENTIONALLY BLANK ...
Страница 298: ...Appendix I Glossary I 12 Rev 6 March 2011 Part 17997 PAGE LEFT INTENTIONALLY BLANK ...
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