ERIS Oxycircircone
Gas detectors are designed to measure the volume fraction of oxygen (O2), carbon monoxide (CO), as well as to issue an alarm when the specified oxygen content threshold values are reached.
These devices are used to optimize combustion modes in thermal power plants, oil refining, metallurgy, mechanical engineering and other industries where gaseous, liquid and solid fuels are used.
This gas detector is a stationary, automatic device designed to measure the volume fraction of oxygen (O2) and carbon monoxide (CO). It also issues an alarm when the specified thresholds are reached in zones of classes 1, 2, where the formation of explosive mixtures of subgroups IIA, IIB+H2, IIIA, IIIB+H2 is possible, at temperature classes T3 (in accordance with the State Standard 31610.20-1-2016/ IEC 60079-20-1:2010)
The type of gas detector is stationary, automatic. The sampling method can be diffusion or forced, and the operating mode is continuous.
The sensors used in the gas detector include:
- Electrochemical method using a sensing element based on zirconium dioxide (ZrO2) to measure the volume fraction of oxygen;
- Semiconductor method for measuring the volume fraction of carbon monoxide;
Structurally, gas detectors include a power and processing unit (PPU), a measuring cell and a probe.
The main functions of the gas detector include:
- Digital indication of the content of the detected component in real time on the LCD display;
- A Visual alarm when the content of the detectable component reaches the set trigger thresholds "THRESHOLD 1" and "THRESHOLD 2";
- Fault indication and operating errors;
- Data exchange with PC via RS-485 Modbus RTU digital serial interface;
Relay outputs up to 3 pcs.
| Metrological characteristics | |||||
| The component being defined | Measuring range of the volume fraction of the component being determined | The limits of the permissible basic error | |||
|
|
| Abso- lutely | Given | Relative | |
| oxygen (O2) | from 0 to 2 % from 0 to 5 % from 0 to 10 % from 0 to 25 % | - | ±2 % | - | |
| from 5 to 100 % | - | - | ±2 % | ||
| Products incomplete combustion in converted to (CO) | 0 - 500 ppm | - | ±5 % | - | |
| 0 - 1000 ppm | - | ±5 % | - | ||
| 0 - 2000 ppm | - | ±5 % | - | ||
| 0 - 1 % | - | ±2 % | - | ||
| 0 - 5 % | - | ±2 % | - | ||
| Substances to be determined, measurement ranges, limits of the permissible basic error | |
| The unit price of the lower category for the oxygen channel, vol.d. | 0,01 |
| The unit price of the lower category for the carbon monoxide channel, ppm | 1 |
| Operating conditions | |
| Ambient temperature, °C - temperature option 1 - temperature option 2 | from - 60 to + 65 from - 60 to + 75 |
| The maximum temperature of the analyzed gas, °C (depending on the modification of the probe) | 450,704,1024,1648 |
| Atmospheric pressure, kPa | from 70 to 130 |
| Relative humidity of the air, % | from 10 to 95 (without condensation of moisture) |
| Design Characteristics | |
| Ex marking | 1Еx db IIB+H2 T3 Gb Х / Еx tb IIIB+ H2 T195℃ Db Х |
| Ingress Protection (IP) | IP66/IP67 IP66/IP68 |
| Protection against electric shock according to the State Standard 12.2.007.0-75, class | III |
| Overall dimensions of the power supply and processing unit, mm, not exceeding | 306×221×175(without probe) |
| Weight, kg, not exceeding | 15 (without probe) |
| Length of the standard probe, mm, not exceeding | 6101) 9101) 12201) |
| Weight of the standard probe, mm, not exceeding | 2,51) 3,11) 4,51) |
| Pressure of the analyzed gas, mm H2O | ±150 |
| Electrical characteristics | |
| AC power supply voltage, V Frequency, Hz | from 187 to 253 from 49 to 51 |
| Power consumption, VA | 100 |
| The output signal: - digital - analog current, mA | RS-485 Modbus RTU from 0 to 5 from 4 to 20 |
| The maximum switching current of the relay, A | 2 (30 V DC or 250 VAC) |
| The ranges for setting alarm thresholds for gas detectors should be: - alarm "Threshold 1", volume fraction, % - alarm "Threshold 2", volume fraction, % | from 0,3 to 15,0 from 0,5 to 21,0 |
| Characteristics of signal establishment | |
| Time to set the output signal at the T0.9 level, sec | 10 |
| Warm-up time of the gas detector, min | 30 |
| Reliability Characteristics | |
| Average service life, years | 212)3) |
| Assigned service life, years | 212)304) |
| Operating time to failure, h | 1100002)3) |
