RS O3 N01 OLED-10P (485 Type) Aquaculture Gas Detection Device Ozone Transmitter with Display DC10-30V Condition: Item Type: Ozone Transmitter Material: PVC Power Supply: 10-30V DC Average Power Consumption: 0.1W Output Signal: 485 (ModBus-RTU) Temperature Measurement Range: -40 ℃ -80 ℃ Temperature Accuracy: ± 0.5 ℃ Humidity Measurement Range: 0-100% RH Humidity Accuracy: ± 3% RH Ozone Measurement Range: 0-10.00ppm, 0-100ppm Working Temperature: -10 ℃ -55 ℃ Working Humidity: 15% RH-90% RH (No Condensation) Working Pressure: 91-111Kpa Data Update Time: 1s Repeatability: ≤2% Output Value Stability (Month): ≤7% Signal Value / Year Response Time: ≤35S Warm-Up Time: ≥ 5 Minutes Resolution: Range: 0-10ppm: 0.01ppm, Range: 0-100ppm: 0.1ppm Accuracy: ± 6% FS Zeroing Drift: Range: 0-10ppm: ≤ ± 1ppm Range: 0-100ppm: ≤ ± 5ppm Note: All the above specifications are measured under the environment conditions: temperature 20 ℃, relative humidity 50% RH, 1 atmospheric pressure, and the gas concentration to be measured does not exceed the sensor range. Weight: Approx. 190g / 6.7oz Panel Size: Approx. 8.8x8.8cm / 3.5x3.5in Interface Description: Thread Color Explanation Power Supply Brown Power Positive (10 - 30V DC) Black Power Negative Communication Yellow 485-A Blue 485-B Common Problems and Solutions Device cannot connect to PLC or computer Possible reason: 1. The computer has multiple COM ports, and the selected port is incorrect. 2. The device address is wrong, or there are devices with duplicate addresses (the factory default is all 1). 3. Baud rate, check mode, data bit, stop bit error. 4. The host's polling interval and waiting time for answering are too short, and both need to be set above 200ms. 5. The 485 bus is disconnected, or the A and B lines are reversed. 6. If there are too many devices or the wiring is too long, power should be supplied nearby, add a 485 enhancer, and add 120Ω terminal resistance. 7. The USB to 485 driver is not installed or damaged. 8. The equipment is damaged.