Yokogawa 2-Wire Dual Channel Transmitter/Analyzer FLXA21 Manual de usuario Pagina 167
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<14. CALIBRATION OF DO (Dissolved Oxygen)>
14-2
IM 12A01A02-01E 5th Edition : Oct. 31, 2013-00
14.1 Air calibration
Span calibration in the ambient atmosphere is the most common and easiest method.
Although setting the Zero Calibration to “Enabled” allows 2-point calibration of Zero (0%) and
Span(100%),onlyspancalibrationisgenerallyperformed.Forzerocalibration,seethenext
section.
Set the sensor in the maintenance mode. Wash off any stain on the membrane and use a soft
tissue to wipe off any remaining water from the membrane.
Leavethesensorinanenvironmentwithouttemperatureuctuationorairowforabout10
minutes,suchasinanemptycontainer.Afterconrmingthatthereadingisstable,calibratethe
sensor.
14.2 Water calibration
Watercalibrationisamethodofcalibratingdissolvedoxygenanalyzersinalaboratory.Accurate
results can be obtained if the span calibration is performed carefully in air-saturated water.
Although setting the Zero Calibration to “Enabled” allows 2-point calibration of Zero (0%) and
Span (100%), the reading must have been stable before performing zero calibration. Therefore,
zero calibration takes a relatively long time.
Conduct water calibration in fresh water. For zero calibration in salt water, perform it by manual
calibration.
Set the sensor in the maintenance mode. Wash off any stain on the membrane and use a soft
tissue to wipe off any remaining water from the membrane.
l Air-saturated water
Pour water (without salt content) into a beaker or other container, and place it on a magnetic
stirrer or other agitator. Put a stirring bar in it and agitate the water, and send air from a pump
(bubbling). It takes 15 to 30 minutes until the water is fully saturated. Then put the sensor in this
water which is still agitated and bubbling, and calibrate it. Keep the sensor at least 3 cm above
the bottom of the beaker to prevent the membrane from directly contacting the air bubbles.
l Water for zero calibration
Zero calibration takes a long time and normally there is no need to perform it. A clean sensor
doesnothaveazerocurrentandthusdoesnotrequirezerocalibration.
Forthezerocalibrationwater,dissolve20to30gramsofsodiumsultein1literofdesalinated
water.
NOTE
Dissolvesodiumsulteinthewaterandwaituntilthereadingbecomesstablebeforecalibrating
the sensor. Even a healthy sensor needs 40 to 50 minutes. Leave the sensor in the solution.
- Model FLXA21 1
- 2-Wire Analyzer 1
- CAUTION 3
- CONTENTS 7
- 1. INTRODUCTION AND GENERAL 13
- DESCRIPTION 13
- 2012.01J312FA012 14
- -D-P-S-AA-P1-NN-AN-L1N-NN 14
- /UM/SCT/H6 14
- 4mA 20mAPH1 17
- 4mA 20mADiff-pH 17
- Measurement value (pH) 19
- WARNING 27
- 2. WIRING AND INSTALLATION 28
- 2.1 Installation site 29
- F0202.ai 30
- F0203.ai 30
- F0204.ai 31
- 2.4.1 Grounding 32
- 2.4.3 Wiring cover 33
- 2.5 Sensor wiring 34
- Glass sensor on Input 1 37
- Reference sensor on Input 2 37
- REFTC Liquid 38
- PHTC ORPLiquid 38
- 2.6 Mounting methods 41
- 3. OPERATION OF pH/ORP 43
- 3.1 Change language 44
- 3.2 Quick setup 44
- For details, see section 4.1 45
- Figure 3.5 Change display 47
- Figure 3.6 Detail display 48
- 3.5 Trend graphics 52
- Figure 3.10 Trend screen 53
- Figure 3.11 Trend graphics 53
- 4. COMMISSIONING OF pH/ORP 55
- 4.1 Sensor setup 57
- 4.2 Measurement setup 57
- 4.2.2 Temperature settings 58
- 4.2.4 Calibration settings 59
- 4.2.5 Impedance settings 62
- 4.2.6 Concentration 62
- 4.3 Output setup 63
- Figure 4.4 Redundant system 64
- 4.4 Errorconguration 65
- 4.5 Logbookconguration 67
- 4.6 Advanced setup 67
- 4.6.2 Tag 68
- 4.6.3 Passwords 68
- 4.6.4 Date/Time 68
- 4.6.5 Communication 68
- 4.7 Display setup 71
- Display setup 72
- 4.7.2 Trend 73
- 4.7.3 Auto Return 73
- 4.7.4 Adjust contrast 73
- 4.7.5 MONITOR display 73
- 4.8 Calculated data setup 74
- 5. CALIBRATION OF pH/ORP 75
- 5.1 pH calibration 76
- 5.1.2 Automatic calibration 77
- 5.2 Temperature calibration 79
- Tag:FLXA21–PH 80
- 6.1 Change language 82
- 6.2 Quick setup 82
- 4mA 20mAConduct1-TC1 84
- Figure 6.5 Change Display 85
- Figure 6.6 Detail display 86
- 6.5 Trend graphics 90
- Figure 6.9 Trend screen 91
- Figure 6.10 Trend graphics 91
- 7. COMMISSIONING OF SC 93
- (Conductivity) 93
- Linear 94
- 7.1 Measurement setup 95
- 7.1.5 Calibration settings 97
- 7.1.6 Concentration 97
- 7.2 Output setup 98
- Conduct1 - TC1 : 99
- Conductivity of sensor 1 99
- Temperature compensation 1 99
- Figure 7.2 Redundant system 100
- 7.3 Errorconguration 101
- 7.4 Logbookconguration 102
- 7.5 Advanced setup 103
- 7.5.3 Passwords 104
- 7.5.4 Date/Time 104
- 7.5.5 Communication 104
- 7.5.6 Factory setup 105
- 7.6.2 Trend 106
- 7.6.3 Auto Return 107
- 7.6.4 Adjust contrast 107
- 7.6.5 MONITOR display 107
- Figure 8.1 Calibration 109
- 8.1 Cell constant (manual) 110
- 8.3 Air calibration 110
- 8.4 Sample 111
- 8.5 Temperaturecoefcient 111
- 8.6 Temperature calibration 111
- Tag:FLXA21–SC 112
- Conductivity) 113
- 9.1 Change language 114
- 9.2 Quick setup 114
- Monitor display 115
- Tag:FLXA21–ISC 116
- 9.4 Zooming in on details 117
- Outputsetup→mA 118
- F0310.ai 120
- 9.5 Trend graphics 121
- Figure 9.8 Trend screen 122
- Figure 9.9 Trend graphics 122
- 9.6 Instrument status screen 123
- Parameter Ref. sect 125
- 10.1.1 Measurement 126
- 10.1.2 Conguresensor 126
- 10.1.3 Temperature settings 126
- 10.1.5 Calibration settings 127
- 10.1.6 Concentration 128
- 10.2 Output setup 129
- 10.3 Errorconguration 130
- 10.4 Logbookconguration 131
- 10.5 Advanced setup 132
- 10.5.3 Passwords 133
- 10.5.4 Date/Time 133
- 10.5.5 Communication 133
- 10.6 Display setup 134
- 10.6.3 Auto Return 135
- 10.6.4 Adjust contrast 135
- 10.6.5 MONITOR display 135
- X= 30 mm (Min.) 137
- 11.1 Cell constant (manual) 138
- 11.3 Air calibration 138
- 11.4 Sample 139
- 11.5 Temperaturecoefcient 139
- Execute & Setup 141
- 12.1 Change language 142
- 12.2 Quick setup 142
- 4mA 20mAOxygen1 144
- Figure 12.5 Change display 145
- (Fig.12.7) 146
- (Fig.12.6) 148
- Figure 12.8 Trend screen 149
- Figure 12.9 Trend graphics 150
- Execute &Setup 152
- Commissioning 152
- 13.2 Measurement setup 154
- 13.2.6 Calibration settings 155
- 13.3 Output setup 156
- Reset redundant system 157
- Output setup 157
- 13.4 Errorconguration 158
- 13.5 Logbookconguration 159
- 13.6 Advanced setup 160
- 13.6.3 Passwords 161
- 13.6.4 Date/Time 161
- 13.6.5 Communication 161
- 13.6.6 Factory setup 163
- 13.7.2 Trend 164
- 13.8 Calculated data setup 165
- Figure 14.1 Calibration 166
- 14.1 Air calibration 167
- 14.2 Water calibration 167
- 14.4 Temperature calibration 168
- Tag:FLXA21–DO 169
- Figure 15.1 170
- 15.1 Change language 171
- 15.2 Quick setup 171
- Tag:SENCOM 173
- 15.4 Zooming in on details 174
- F0410.ai 176
- Figure 15.8 Sterilization 179
- (Fig.15.5) 180
- Figure 15.10 Trend screen 181
- Figure 15.11 Trend graphics 182
- 16.1 Sensor setup 186
- 16.2 Measurement setup 187
- 16.2.4 Calibration settings 189
- ORP settings 191
- 16.2.5 Impedance settings 192
- 16.2.6 Concentration 192
- 16.3 Output setup 193
- 16.4 Errorconguration 194
- 16.5 Logbookconguration 195
- 16.6 Advanced setup 196
- 16.6.2 Tag 197
- 16.6.3 Passwords 197
- 16.6.4 Date/Time 197
- 16.6.5 Communication 197
- F050605_2.ai 199
- 16.7 Display setup 200
- 16.7.2 Trend 201
- 16.7.3 Auto Return 201
- 16.7.4 Adjust contrast 201
- 16.7.5 MONITOR display 201
- Figure 17.1 Calibration 202
- 17.1 pH calibration 203
- 17.1.2 Automatic calibration 204
- 17.2 Temperature calibration 206
- 18. MAINTENANCE 208
- 19. TROUBLESHOOTING 209
- Appendix 1 For pH/ORP 213
- Figure 1 Conductivity 218
- 147.6 - 124.5 219
- App.2-10 226
- App.2-11 227
- App.2-12 228
- Appendix 3 229
- App.3-10 238
- App.3-11 239
- ISO 5814:1990(E) 240
- =1atm=760 241
- Customer 242
- Maintenance 242
- Parts List 242
- Revision Record 243
- Supplement 244
- IM 12A01A02-01E 2/3 245
- 5th Edition 245
- IM 12A01A02-01E 3/3 246
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