YOKOGAWA PH450G

<1. General>
1-1
IM 12B07W01-04EN 1st Edition : Nov. 11, 2016-00
1. General
Chemical Cleaning pH Measuring System is designed to automatically clean pH electrodes
with a chemical solution while they remain in the system. The system is especially effective in
restoring the performance of a pH electrode which has been deteriorated through repeated
pH measurements of highly alkaline solutions. It is also effective in cleaning pH electrodes
contaminated with calcium sulfate (CaSO
4
) scale or calcium carbonate (CaCO
3
) scale.
1.1 Standard Specications
Chemical Cleaning pH Measuring System are congured as the table shown below.
Chemical Cleaning pH Measuring System
pH/ORP Converter 2-wire Analyzer
Chemical Cleaning unit PH8SM3-E PH8SM3-G or PH8SM3-F
pH analyzer PH450G FLXA202 or FLXA21
Distributor ― PH201G
pH sensor
PH8EFP-□-TT2 (Note)
Holder PH8HS3
Note You can select WTB10 Terminal Box, if necessary.
The following are specication describing on PH8SM3 Chemical Cleaning Unit and PH8HS3
Holder. For more information on other products, please read corresponding instruction manuals
attached to each product.
n PH8SM3 Chemical Cleaning Unit
Cleaning Method:
Automatic chemical cleaning by air bubbling
Interval Time:
0.1 to 36.0 hours (To be set in the pH converter)
Wash Time:
0.1 to 10 min (factory setting: 4 min)(To be set in the pH converter)
Relaxation Time:
0.1 to 10 min. (factory setting: 0.5 min.)(To be set in the pH converter)
Bubbling (SV1: On) Time:
0 to 10 min. (factory setting: Approx. 2 min.)
Cylinder Failure Time:
0 to 1 min. (factory setting: Approx. 0.5 min.)
Structure:
Freestanding rack for indoor installation.(For the uv protection,when you install the unit
outdoors, specify tank cover and select Fluoropolymer (PTFE) tube, or specify hood if
necessary.
Main Components:
Chemical solution tank, control box, air-pressure regulator, and power supply unit (for pH/
ORP Converter only)