Yokogawa FD20 Immersion Fitting - Manual (Page 2)

TABLE OF CONTENTS
1. INTRODUCTION ......................................................................................................... 2
2. SPECIFICATIONS ....................................................................................................... 3
2-1. General specifications ............................................................................................ 3
2-2. Functional specifications ........................................................................................ 3
2-3. Model and codes ................................................................................................... 4
2-4. External dimensions .............................................................................................. 5
3. INSTALLATION .......................................................................................................... 6
3-1. Selecting the installation site .................................................................................. 6
3-2. Installation .............................................................................................................. 6
3-3. Cables and sensor mounting ................................................................................. 7
4. MOUNTING OF ACCESSORIES .............................................................................. 11
4-1. Mounting kit (FP20-S13) ...................................................................................... 11
4-2. Mounting kit (order nr. 82850747) ........................................................................ 12
4-3. Cleaning systems ................................................................................................. 12
4-4. Salt bridge ........................................................................................................... 15
4-5. Protection hoses .................................................................................................. 15
5. MAINTENANCE AND INSPECTION ........................................................................ 16
6. SPARE PARTS .......................................................................................................... 16
1. INTRODUCTION
The model FD20 immersion fittings are used to submerge sensor tips so that the pH and/or
ORP (redox) potential of liquids in open vessels, tanks, drains etc. can be measured.
The fittings are available for mounting of either:
- one electrode
- three electrodes
- four electrodes or alternatively three electrodes and a cleaning system.
Features
• Designed for either pH or ORP measurements in tanks open vessels and drains.
• “Hoisting cable” for easy maintenance.
• Pre-selected immersion length.
• Wide choice of construction materials.
• Flange mounting.
• High degree of standardisation reduces spare holding requirements.
• Liquid earth pin for stable measurements.
• Chemical or brush cleaning systems as an option.