YOKOGAWA PH450G User Manual

274 pages

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User’s

Manual

Model FLXA202 / FLXA21

2-Wire Analyzer

IM 12A01A02-01E

8th Edition

Default Chapter6
- Bottom Side6
- Table of Contents11
Introduction17
- Section 3 Section17
- Instrument Check19
- Screen Operation21
  - Section 4 Section21
  - Section 5 Section22
- Maintenance25
- Passwords26
- Regulatory Compliance26
1 Introduction and General Description17
2 Wiring and Installation36
- Section 11 Section37
- Installation Site38
- Removing the Wiring Cover39
- Installing the Cable Glands40
- Wiring the Power Supply42
- Sensor Wiring46
- Mounting Methods55
- Operation56
3 OPERATION of Ph/Orp57
- Change Language58
- Quick Setup58
- Home Display, Main Display and Monitor Display60
- Zooming in on Details61
- Trend Graphics66
- Instrument Status Screen67
- Calibration and Commissioning68
4 COMMISSIONING of Ph/Orp69
- Sensor Setup71
- Measurement Setup71
- Output Setup77
- Error Configuration79
- Logbook Configuration81
- Advanced Setup81
- Display Setup85
- Calculated Data Setup88
5 CALIBRATION of Ph/Orp89
- Ph Calibration90
- Temperature Calibration93
- ORP Calibration (Rh Calibration)93
- Hold94
- Temporary Output94
6 OPERATION of SC (Conductivity)95
- Change Language95
- Quick Setup96
- Home Display, Main Display and Monitor Display98
- Zooming in on Details100
- Trend Graphics104
- Instrument Status Screen105
- Calibration and Commissioning106
7 COMMISSIONING of SC (Conductivity)107
- Measurement Setup109
- Calibration Settings111
- Error Configuration115
- Logbook Configuration116
- Advanced Setup117
- Passwords118
- Factory Setup119
- Trend120
- Auto Return121
8 CALIBRATION of SC (Conductivity)123
- Cell Constant (Manual)123
- Air Calibration124
- Cell Constant (Automatic)124
- Cell Constant (Manual)124
- Hold124
- Sample124
- Hold125
- Temperature Calibration125
- Temperature Coefficient125
- Temporary Output126
9 OPERATION of ISC (Induvtive Conductivity)127
- Change Language128
- Quick Setup128
- Main Display and Monitor Display130
- Zooming in on Details131
- Trend Graphics135
- Instrument Status Screen137
- Calibration and Commissioning137
10 COMMISSIONING of ISC (Inductive Conductivity)138
- Measurement Setup138
- Output Setup143
- Error Configuration144
- Logbook Configuration145
- Advanced Setup146
- Display Setup148
11 CALIBRATION of ISC (Inductive Conductivity)150
- Cell Constant151
- Air Calibration152
- Cell Constant (Automatic)152
- Cell Constant (Manual)152
- Sample153
- Temperature Coefficient153
- Hold154
- Temperature Calibration154
12 OPERATION of DO (Dissolved Oxygen)155
- Change Language156
- Quick Setup156
- Home Display, Main Display and Monitor Display158
- Zooming in on Details159
- Trend Graphics163
- Instrument Status Screen164
- Calibration and Commissioning164
13 COMMISSIONING of DO (Dissolved Oxygen)166
- Sensor Setup167
- Measurement Setup168
- Output Setup170
- Error Configuration172
- Logbook Configuration173
- Advanced Setup174
- Display Setup177
- Calculated Data Setup179
14 CALIBRATION of DO (Dissolved Oxygen)180
- Air Calibration181
- Water Calibration181
- Manual Slope Calibration182
- Temperature Calibration182
- Hold183
- Temporary Output183
15 OPERATION of SENCOM Ph/Orp184
- Change Language185
- Quick Setup185
- Main Display and Monitor Display187
- Zooming in on Details188
- Trend Graphics195
- Instrument Status Screen196
- Calibration and Commissioning196
16 COMMISSIONING of SENCOM Ph/Orp198
- Sensor Setup200
- Measurement Setup201
- Output Setup207
- Error Configuration208
- Logbook Configuration209
- Advanced Setup210
- Display Setup214
17 CALIBRATION of SENCOM Ph/Orp216
- Ph Calibration217
- Temperature Calibration220
- ORP Calibration (Rh Calibration)220
- Hold221
18 Maintenance222
- Periodic Maintenance222
19 Troubleshooting223
Appendix 1 for Ph/Orp226
Appendix 2 for SC (Conductivity)230
Appendix 3 for ISC (Inductive Conductivity)242
- Measurement Principle251
Appendix 4 for DO (Dissolved Oxygen)253
Revision Record257

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Startup Manual35 pages

Questions and Answers:

A
aliciagarciaAug 12, 2025
What to do if CYLINDER FAIL signal appears on YOKOGAWA Measuring Instruments?
- K
  Kevin KochAug 12, 2025
  If the 'CYLINDER FAIL' signal appears on your YOKOGAWA Measuring Instruments, first, ensure the PG2 pressure gauge in the control box displays the correct preset value while in cleaning mode. If the reading is low, check for loose connections and readjust accordingly. Also, remove any dirt from the cylinder barrel and apply a thin layer of grease. Degraded lubricating grease can also cause this issue, so cleaning and re-greasing are important. If the slide of the cylinder is in an upper position, refer to section 6.5.
A
Ashley JenningsAug 17, 2025
What to do if a smaller quantity of chemical solution is fed to holder in YOKOGAWA PH450G?
- S
  Sheila MurphyAug 17, 2025
  If a smaller quantity of chemical solution is being fed to the holder in your YOKOGAWA Measuring Instruments, inspect the thin covering in the bottom of the metering tank and replace it if it's deteriorated or damaged. If the thin covering is fine, check for leaks around the SV1 solenoid valve (in the control box) that's used for forced feeding of the chemical solution. If air flows through the valve when closed, replace it. Also, check the chemical solution in the cleaning chamber for traces indicating backflow into the chemical tank. If the bleed valve is clogged due to reverse flow, clean it.

YOKOGAWA PH450G Specifications

General

Type	Portable pH/ORP meter
ORP Measurement Range	-2000 to +2000 mV
Resolution	0.01 pH / 1 mV
Display	LCD with backlight
Operating Temperature	0 to 50°C
Protection Degree	IP67
Measurement Object	pH and ORP
pH Measurement Range	0 to 14 pH
Accuracy	±0.01 pH
Temperature Compensation	Automatic (0 to 100°C)
Output	RS-232C
Power Supply	4 x AA batteries