Yokogawa 415 Steam and Gas - Manual (Page 3)

CONTENTS
List of Symbols
1. Introduction 7
1.1 Model Number Designation 9
2. Specification 10
3. Operation 14
3.1 Front Panel Operation 14
3.2 Flow Equations for Gases 16
3.2.1 Ideal Gas Law 22
3.2.2 General Gas 24
3.2.3 Natural Gas 25
3.3 Steam Measurement 26
3.4 Filtering 31
3.5 Non-Linearity Correction 33
3.5.1 Digital Input Linearity Correction 33
3.5.2 Analog Input Linearity Correction 35
3.6 The Output Pulse 37
4. Options 39
4.1 The 4-20mA Output Option 39
4.1.1 Load Specification 40
4.1.2 Calculation 40
4.2 The RS232/422/485 Interface Option 43
4.2.1 Hardware 43
4.2.2 Multipoint Communication 44
4.2.3 Communication Protocol 46
4.3 Data Logging 48
4.4 The Relay Output Option 49