Beskrivelse
Produsents beskrivelse av Monicon S500L:
The Monicon S500L is a high quality, self contained, Intelligent gas sensor that offers a host of sophisticated features to provide fast, reliable warnings against explosive concentrations of combustible gases.
The S500L will operate as a standalone instrument or in conjunction with a controller or a computer. The S500L is housed in an attractive, compact diameter enclosure and may be configured or calibrated by one person, without declassifying the hazardous area. The gas concentration is indicated on a 4-character alphanumeric display which also indicates instrument status. The S500L is fully user programmable and no physical adjustments are necessary during calibration as the on-board computer assists the calibration procedure. All user variables are stored in non-volatile memory (EEPROM) and retained indefinitely even during total power failure.
The S500L uses the proven Monicon CGS500 thermocatalytic sensor combined with advanced, surface-mount microprocessor and firmware technology. Combustible gas oxidising on the surface of a thermocatalytic element causes an imbalance in a Whetstone bridge circuit. This imbalance is amplified to give a voltage proportional to the gas concentration. This voltage is then processed by the CPU. A watchdog circuit monitors the system operation and resets the CPU if a failure is detected.
The S500L is calibrated or user-programmed by activating the magnetic switches with a magnet. The operator is then guided through a variety of options by a user-friendly menu. The CPU constantly verifies system operation. In the unlikely event of a fault, the operator is alerted with a helpful diagnostic display.
Produsents beskrivelse av S500L-IR:
The Monicon S500L-IR is a high quality, self contained, NDIR (Non Dispersive Infra Red) gas sensor that offers a host of sophisticated features to provide fast, reliable warnings against explosive concentrations of combustible gases.
The S500L-IR will operate as a standalone instrument or in conjunction with a controller or a computer. It is housed in an attractive, compact diameter enclosure and may be configured or calibrated by one person, without declassifying the hazardous area.
The gas concentration is indicated on a rugged 4-character alphanumeric display which also indicates instrument status.
The S500L-IR is fully user programmable and no physical adjustments are necessary during calibration as the on-board computer assists the calibration procedure. Because the unit uses infrared energy rather than catalysts, the sensor is unaffected by the catalytic poisons that have an adverse affect on traditional “pellistor” based sensors.
All user variables are stored in non-volatile memory (EEPROM) and retained indefinitely even during total power failure.
The S500L-IR uses advanced NDIR technology combined with surface-mount microprocessor and firmware technology. A pulsed infrared source emits a broad spectrum infrared beam within an optical cavity. The system measures the adsorption of infrared energy as it passes through a gas sample.
Different gases have clearly defined absorption characteristics, their concentration can be determined by their absorption of infrared radiation at the wavelength determined by filter lambda 1 in the diagram. To compensate for interfering factors filter lambda 2 isolates another wavelength which is used to measure the total transmission through the optical cavity and is not affected by the gas being monitored. By comparing the infrared energy reaching each of the two detectors, the concentration of the gas sample can be determined. The signal processor compares and linearises these two signals and factors in variations in temperature.
The unit is calibrated or user-programmed by activating magnetic switches with a magnet. The operator is then guided through a variety of options by a userfriendly menu. The CPU constantly verifies system operation. In the unlikely event of a fault, the operator is alerted with a helpful diagnostic display.
