Selecting The Measurement Point - YOKOGAWA DO70G User Manual

n Assembling the Adaptor
An adaptor (optional) is necessary to assemble DO70G into the DOX8HS submersion type
holder, PB350G angled floating ball holder, or PB360G vertical floating ball holder.
DOX8HS Submersion type holder
Place an O-ring here.
Figure 2.1
2.2 Installation
The DO70G optical dissolved oxygen sensor can be assembled into the PB350G angled floating
ball holder, PB360G vertical floating ball holder, or DOX8HS submersion type holder. The
assembly is submerged to the optimum point to obtain precise measurements.
This section explains how to select the measurement point and sensor holder.
2.2.1 Selecting the Measurement Point
Normally, a location that meets the following requirements may be selected as the measurement point.
l The measured value is representative among the values available for the
solution under measurement (SUM).
Avoid choosing a location where the solution is unevenly distributed, since heavy hunting may
result in the measured value. Also, avoid locations where bubbles occur frequently.
l The temperature and flowrate comply with the operating conditions required
of the sensor and holder.
Note that, if a measured solution running at a high flow rate contains particles of sand, the
permeable membrane of the sensor may be damaged.
<2. Installing the Sensor and Connecting the Cable>
Assembling the Adaptor
DO70G Optical Dissolved Oxygen Sensor
Adaptor for submersion type holder
Adaptor for floating type holder
IM 12J05D04-01E 8th Edition : July 11, 2023
2-2