YOKOGAWA DO70G, User Manual

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<1. General>
1-2
IM 12J05D04-01E
1.3 Standard Specifications
Object of Measurement :
Concentration of oxygen dissolved in sewage and drainage (water);
cannot be used with organic solvents.
Principle of Measurement : Optical (fluorescence) measurement method
Measurement Range : 0 to 25 mg/L
Note: The measurement range must be entered through the dissolved oxygen converter.
Temperature of Measurement water: 0 to 50 °C
Flow rate:
2 m/sec or less
Pressure: 0 to 500 kPa
Resistance Temperature Detector (RTD): NTC 22k
Construction
:
Sensor unit: Stainless steel (316L SS)
O-ring: Ethylene Propylene Rubber (EPDM)
Permeable membrane: Silicone resin
Cable shielding: Heat-resistant flexible PVC
Sensor Cable:
For code -03E, -05E, -10E
Length; 3 m, 5 m, 10 m
Terminal shape;
pin (for converter),
M4 Ring (for power supply unit)
For code -05D, -10D, -15D, -20D
Length; 5 m, 10 m, 15 m, 20 m
Terminal shape; pin
Weight:
Sensor; Approx. 0.1 kg
Cable;
For -��E: Approx. 0.1 kg/m + 0.1 kg
For -��D: Approx. 0.8 kg/m + 0.8 kg
Power supply
DO402G; from DOX10 Power Supply Unit
FLXA402; from FLXA402
• The DOX10 may not be used depending on the relevant standard of your region.
Use a power supply that meets the following specifications.
• Use a power supply that is appropriate for the relevant standard in your region.
• Use a power supply with an output voltage in the range of 24 V DC ± 10% and power consumption of 1 W or higher.
• For wiring the DO70G, connect the input and output cables of the 24 V power supply by separating them by a minimum
spatial distance of 3 mm and creepage distance of 6 mm.
[Characteristics] (when converter is combined with DO70G)
Repeatability : 0.1 mg/L or 3% FS, whichever is greater
Temperature Compensation Error:
Within ±3% FS for a ±5°C change in the range of 0 to 40°C
Response Time : Within 2 minutes (90% response at the time of the sensor’s
immersion in 2 wt% sodium sulfite solution after the immersion in
air-saturated water)
8th Edition : July 11, 2023