| Measuring method |
Membrane type polarography method |
| Measuring range |
Dissolved oxygen concentration: 0 to 20 mg/L Resolution: 0.01 mg/L
Saturation ratio: 0 to 200% Resolution: 1%
Temperature: 0 to 50˚C Resolution: 0.1˚C |
| Repeatability |
Dissolved oxygen concentration: ±0.5% full-scale or less, Temperature: ±0.5˚C (for equivalent input) |
| Linearity |
Dissolved oxygen concentration: ±0.5% full-scale or less, Temperature: ±0.5˚C (for equivalent input) |
| Transmission output |
Two points 4 to 20 mA DC Input/output insulated type Maximum load resistance 900 Ω |
| Contact output |
Three points Non-voltage contact output Relay contact, SPDT(1c)
Contact function R1, R2: Selectable from upper limit alarm, lower limit alarm, ON/OFF control, transmission output hold operation, cleaning output
FAIL: Malfunction alarm
Control operation Control range: 0.02 to 1.00 mg/L (±0.01 to ±0.50 mg/L) |
| Contact input |
One point Contact format: Open collector non-voltage a contact
Contact function: Cleaning operation external input |
| Communication function |
RS-485 Two wire system, Input/output insulated type (not insulated for transmission output) |
| Temperature compensation range |
0 to 50˚C |
| Ambient temperature |
-20 to 55˚C |
| Temperature measurement element |
Pt 1000 (0˚C) (Built into DO-1100 probe) |
| Calibration method |
Atmospheric calibration or saturated liquid calibration |
| Self-diagnosis function |
Calibration error, Sensor diagnosis error, Analyzer malfunction |
| Power supply |
90 to 264 V AC 50/60 Hz
Power consumption 15 W or less |
| Construction |
Outdoor installation type: IP65 protection level
Mounting method: 50A pole or wall mounted
Case: Aluminum alloy
Mount fitting/hood: SUS304 |