Yokogawa Integral Oxygen Analyzer ZR202 Manuel d'utilisateur Page 113
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<10. Other Functions>
10-4
IM 11M12A01-04E
10.1.5 Cell Voltage
The cell (sensor) voltage will be an index to determine the amount of degradation of the sensor.
The cell voltage corresponds to the oxygen concentration currently being measured. If the indicated
voltage approximates the ideal value (corresponding to the measured oxygen concentration), the
sensor will be assumed to be normal.
The ideal value of the cell voltage (E), when the oxygen concentration measurement temperature is
controlled at 750°C., may be expressed mathematically by:
E = -50.74 log (Px/Pa) [mV]
where, Px: Oxygen concentration in the sample gas
Pa: Oxygen concentration in the reference gas, (21 vol%O
2
)
Table 10.2 shows oxygen concentration versus cell voltage.
Table 10.2 Oxygen Concentration Vs. Cell Voltage, (cell temperature: 750°C)
%O
2
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
mv 117.83 102.56 93.62 87.28 82.36 78.35 74.95 72.01 69.41
%O
2
1 2 3 4 5 6 7 8 9
mv 67.09 51.82 42.88 36.54 31.62 27.61 24.21 21.27 18.67
%O
2
10 21.0 30 40 50 60 70 80 90
mv 16.35 0 -7.86 -14.2 -19.2 -23.1 -26.5 -29.5 -32.1
%O
2
100
mv -34.4
T10.2E.ai
10.1.6 Thermocouple Voltage
The cell temperature is measured with a Type K (chromel-alumel) thermocouple. The thermocouple
cold junction is located in the detector terminal box. The cell temperature and the thermocouple
voltage (including the voltage corresponding to the cold junction temperature) are displayed.
10.1.7 Cold Junction Voltage
This equipment uses temperature-measurement ICs that measure the cold junction temperatures.
The voltage measured by those ICs is displayed.
10.1.8 Current Output
The analog output current is displayed.
- Model ZR202G 1
- Integrated type 1
- Zirconia Oxygen Analyzer 1
- Introduction 2
- <Introduction> 3
- Relates to 3
- (1) About This Manual 4
- IMPORTANT 5
- NOTICE 7
- After-Sales Warranty 8
- CONTENTS 10
- <CONTENTS> 11
- 1. Overview 16
- 1.1.2 System 2 17
- 1.1.3 System 3 18
- 1.2.1 System Components 19
- 2. Specications 20
- <2. Specications> 21
- <2. Specications> 22
- Functions 23
- Display and setting content: 23
- Model and Codes 25
- • External Dimensions 26
- • Standard Accessories 26
- 2.1.3 ZO21R Probe Protector 28
- • Specications 31
- • Model and Codes 31
- External Dimensions 32
- 2.3 ZO21S Standard Gas Unit 33
- 2.4 Other Equipment 34
- • Standard Specication 35
- • Standard Specications 35
- Standard Specications 36
- F2.16.EPS 38
- Blank Page 39
- 3. Installation 40
- 3.1.2 Probe Insertion Hole 41
- Probe Protector (ZO21R) 42
- <3. Installation> 43
- 3.2.1 Installation Location 44
- 3.3.1 Installation Location 46
- Calibration Gas Cylinder 48
- 4. Piping 50
- Stop valve 51
- Tube connection 51
- 4.2 Piping for System 2 52
- 4.3 Piping for System 3 53
- <4. Piping> 54
- Compensation 55
- Table 4.3 Piping Parts 57
- 5. Wiring 58
- 5.1.2 Wiring 59
- 5.2 Wiring for Analog Output 60
- 5.3.1 Wiring for Power Line 61
- 5.5 Wiring for Contact Input 62
- 5.5.2 Wiring Procedure 63
- 6. Components 64
- 7. Startup 66
- 7.2 Valve Setup 67
- 7.4.1 Display and Switches 68
- 7.4.2 Display Conguration 69
- 7.4.5 Changing Set Values 71
- 7.7 Output Range Setting 74
- 7.8 Checking Current Loop 76
- 7.9 Checking Contact I/O 76
- 7.9.1 Contact Output Check 77
- 7.10 Calibration 80
- 7.10.2 Manual Calibration 82
- 8. Detailed Data Setting 84
- Concentration ( at 20 mA) 85
- 8.2.4 Default Values 85
- 8.3 Output Hold Setting 86
- Output hold time 87
- 8.3.3 Output Hold Setting 88
- 8.3.4 Default Values 88
- 8.4.1 Alarm Values 89
- 8.4.2 Alarm Output Actions 89
- 8.4.3 Alarm Setting 90
- 8.5 Output Contact Setup 91
- 8.5.3 Default Values 93
- 8.6 Input Contact Settings 94
- 8.7 Other Settings 95
- 8.7.3 Setting Fuels 97
- For liquid fuel 98
- For gas fuel 98
- For solid fuel 98
- Absolute 99
- Dry-bulb temperature, °C 99
- Table 8.16 Fuel Data 100
- 8.7.4 Setting Purging 101
- 9. Calibration 102
- 9.1.2 Calibration Gas 103
- 9.1.3 Compensation 103
- <9. Calibration> 104
- <9. Calibration> 105
- 9.2 Calibration Procedures 106
- IM 11M12A01-04E 108
- 9.2.2 Calibration 109
- 10. Other Functions 110
- 10.1.1 Air Ratio 112
- 10.1.2 Cell Temperature 112
- 10.1.3 C. J. Temperature 112
- 10.1.5 Cell Voltage 113
- 10.1.6 Thermocouple Voltage 113
- 10.1.7 Cold Junction Voltage 113
- 10.1.8 Current Output 113
- 10.1.9 Response Time 114
- 10.1.11 Robustness of a Cell 114
- <10. Other Functions> 115
- 00.06.21 116
- 10.4 Reset 118
- Table 10.6 Resetting 119
- 10.5.3 Calibration Gas Flow 126
- Setting Unit 128
- Calibration gas tube 131
- Exploded view of components 131
- (with outside diameter 131
- Groove in which the contact 132
- (E7042BS) is placed 132
- F11.2E.ai 132
- View A-A 134
- F11.4E.ai 134
- 11.1.5 Replacement of O-ring 135
- F11.5E.ai 137
- Cover of Display 137
- Calibration Unit 139
- 12. Troubleshooting 140
- <12. Troubleshooting> 141
- Generated 143
- Multimeter 146
- (Ω) 146
- Heater wire 146
- Customer 150
- Maintenance 150
- Parts List 150
- CMPL 11M12A01-04E 151
- Revision Information 156
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