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January 2006
2-10
Installation
Additional Voltage Outputs
It is possible to use either of the analog current outputs as an
additional voltage output by connecting a precision resistor from the
current output to its return. A voltage will be produced equal to the
output current times the load resistance. To produce a voltage output
range of 1 to 5 volts, connect a 250 ohm resistor (0.1% tolerance
recommended).
Using a 250 ohm resistor, the voltage output is calculated by::
yielding an output voltage of 1.92V for this example.
Alarm Outputs
Each alarm output connects to the contacts of a 5-Amp, Form C
(SPDT) relay.
Make connections as follows:
•
For normally open contacts, connect to NO and COM.
•
For normally closed contacts, connect to NC and COM.
Any available parameter can be used to control an alarm relay by
programming the parameter name and its threshold values. An alarm
can also be programmed to monitor the state of the Control, PACER
Balance, or Service indicators. (See Chapter 4, 5 or 6 for
programming instructions).
Two threshold values are programmed for each parameter—an upper
and a lower value. These values designate an alarm band. How they
are used depends on the alarm type programmed. Details of the alarm
bands are shown below.
Vout
Tactual Tlower
–
(
)
Tupper Tlower
–
(
)
----------------------------------------------
5 1
–
(
)
×
1
+
=
23 0
–
(
)
100 0
–
(
)
---------------------
4
×
1
+
1.92V
=
Содержание Optica
Страница 1: ...GE Sensing Optica General Eastern Dew Point Analyzer Operator s Manual ...
Страница 11: ...Chapter 1 ...
Страница 20: ...Chapter 2 ...
Страница 43: ...Chapter 3 ...
Страница 58: ...Chapter 4 ...
Страница 80: ...Chapter 5 ...
Страница 81: ...Programming the 4x40 Optica Introduction 5 1 Programming Technique 5 2 Programmable Functions 5 4 ...
Страница 94: ...Chapter 6 ...
Страница 95: ...Network Based Programming Introduction 6 1 Programming Screens 6 1 ...
Страница 99: ...Chapter 7 ...
Страница 109: ...Appendix A ...
Страница 114: ...Appendix B ...
Страница 115: ...Humidity Equations and Conversion Chart Introduction B 1 Vapor Pressure B 1 Humidity B 2 ...
Страница 118: ...Humidity Equations and Conversion Chart B 3 January 2006 Figure B 1 Graphical Humidity Conversion Chart ...
Страница 119: ...Appendix C ...
Страница 120: ...Configuring the Serial Interface Wiring to a Personal Computer C 1 ...
Страница 122: ...Appendix D ...
Страница 123: ...Chilled Mirror Sensors Introduction D 1 Depression D 1 Measurement Range D 2 Comparing Optica Models D 3 ...
Страница 127: ...Appendix E ...
Страница 128: ...Glossary ...
Страница 130: ...Appendix F ...
Страница 133: ...Appendix G ...
Страница 134: ...Communicating with the OPTICA Using Ethernet Direct Communication G 1 Computer Communication G 1 ...