How often to calibrate and test the functionality of a gas detector

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Regular calibration and functional testing of the gas detector are not only formal legislative requirements, but also a primary tool for saving lives and property from the dangerous risk of explosion or poisoning. Without a properly functioning sensor, the entire safety system, whether it is a simple model AVANSA 100M or a complex solution with a solenoid valve, becomes completely worthless and deceives the user about its protective function.

Legislative framework and recommended intervals

The Labor Code and Government Regulation No. 508/2009 Coll. clearly stipulate that gas detectors must undergo regular inspection and calibration at least once every 12 months, with a recommended interval of 6 months for critical operations. This obligation applies not only to the measurement of concentration, but also to the verification of the entire system's response, including the warning signalization and, if applicable, the shutdown of the gas supply via the solenoid valve.

The manufacturer often recommends testing sensitivity using a standard calibration gas every six months.
For home use, an annual check is sufficient if the device is installed under normal conditions.
In industrial areas with high dust levels or chemical vapors, the interval is reduced to 3 months.

Calibration procedure and necessary tools

Calibration requires an accurate calibration gas with a known content (e.g., 50 % HES for methane), which has a valid certificate, and special connectors for connecting to the detector. For the model AVANSA 100M, the procedure is relatively simple: after opening the cover, the sampler is connected, the calibration mode is started, and one waits for the value on the display to stabilize. If the value does not match the gas concentration in the cylinder, the sensor must be manually adjusted or replaced.

With more advanced systems, such as Gas Detector AVANSA 100M + solenoid valve G1" DN25, it is also necessary to check the mechanical function of the valve, which must immediately close the gas supply in the event of a simulated alarm signal. A failure in this area can have fatal consequences, because the detector will indicate that it is working, but physically will not close the flow of flammable gas.

Testing functionality and practical tests

In addition to technical calibration, it is essential to perform regular functional tests using a test spray or gas canister, which are available in security equipment stores. This test is performed by spraying a small amount of gas onto the sensor's input opening and observing whether the red indicator light turns on and the sound alarm is triggered. For systems with a solenoid valve, it is crucial to verify that the valve actually closes the supply after the alarm is activated, which requires a visual check of the valve lever position.

In practice, we have seen cases where owners of the AVANSA 150MC detector forgot to check after installation whether the valve responded to the test signal. Since the valve was mechanically jammed, in the event of a real gas leak, it would have remained open and the detector would have only "shouted", but not protected the property. Therefore, it is always necessary to check the mechanical part as well as the electronics.

The test canister must have sufficient volume for at least 3-4 seconds of testing.
Always test in a well-ventilated area to avoid false alarms.
After the test, check whether the alarm automatically resets after the time has elapsed.

Factors affecting sensor lifespan
Pellistor-type sensors, which are standard in detectors such as Gas Detector AVANSA 100M, have a limited lifespan, which ranges between 5 to 10 years depending on the quality of the environment. In atmospheres with high levels of silicone vapors (e.g., in kitchens with the use of cosmetics or cleaning products) or with sulfur and chlorine, sensor poisoning occurs quickly, causing a loss of sensitivity even before the warranty period expires.
Another factor is extreme temperature, since the sensors are designed for operation in the range of 0 to 40 °C. If the detector is installed directly above the boiler or near heating appliances, thermal stress can reduce its lifespan by half. Therefore, it is important to follow the placement recommendations, which you can find in our section on mounting height and detector position.

Temperatures above 40 °C accelerate the aging of the catalyst in the sensor.

Humidity above 90 % can cause water condensation on the sensor and false alarms.

Dust and grease can physically block the gas access to the sensor.

Common faults and error signals

The most common fault with AVANSA detectors is a false alarm caused by moisture condensation on the sensor or incorrect placement near devices that produce water vapour. Another issue is "drift" of the sensor, when the device starts to report a gas leak even in the absence of a threat, which requires immediate calibration or replacement of the sensor. In such cases, it is advisable to refer to the manual for the specific model, for example Gas detector AVANSA 100M + solenoid valve G1/2" DN15, where the error codes on the display are described in detail.

If the error "Sensor Error" or "Fault" appears, it does not necessarily mean that the detector is not working, but that the sensor has lost its ability to react to gas. In such a case, it is necessary to disconnect the device from the power supply, wait for it to cool down, and try recalibration. If this does not help, the sensor is likely damaged and needs to be replaced, as repair is not possible.

Error "Sensor Fault" means the loss of sensor sensitivity.
Error "Wire Break" indicates a wire break between the sensor and the control unit.
A periodically blinking LED may indicate low battery power (if the device is battery-powered).

Visual inspection and mechanical functionality of the valve

The electronic signal from the detector is worthless if the mechanical part of the system (solenoid valve) cannot physically interrupt the gas flow. During maintenance, it is essential to manually verify that the valve moves to the closed position upon receiving an alarm signal and that it can open again after the alarm is reset.

Frequently asked questions

Do I need to calibrate the detector every year?

Yes, legislation and manufacturers require at least annual calibration to ensure measurement accuracy and operational safety.

What to do if the detector reports an error after using test spray?

Check whether you used the correct type of gas and whether the sensor is sufficiently aged; if not, it is possible that the sensor is damaged and needs to be replaced.

Is it possible to calibrate the detector using your gas stove?

No, never use gas from the stove for calibration, as you have no control over the exact concentration and you can damage the sensor or create a dangerous situation.

Conclusion

Calibrate and test the gas detector at least once a year to be sure that it will protect you from tragedy in a critical moment. An investment in a quality device and regular service is much cheaper than the consequences of a gas leak, so do not neglect even the smallest warnings on the display.

Do you have a question about this topic?

Are you unsure or dealing with a specific situation in your household? Write to us - we are happy to help.