How do I replace the sensor of a gas detector?

1. The gas detector detects the specific gravity of gas and air.

Due to the detection of heavier-than-air gases, it is necessary to install the gas detector close to the ground, usually about 30cm from the floor, to detect the gas concentration quickly, accurately and stably, so as to take safe treatment measures in response.

To detect lighter-than-air gases, the gas detector needs to be installed close to the ceiling, usually about 30 cm from the top. It should be noted that the installation position of the main engine of the gas detection alarm controller is 160cm from the ground, which is convenient for the operator to operate and avoid the instrument itself becoming an obstacle.

2. Gas detector probe wiring.

The wiring of the gas detector probe is very simple, the premise is to know how many probes should be installed in the detection environment, and then choose the three-wire system or four-wire system according to the number of probes.

After determining the output of the four-wire model, it is necessary to set a reasonable wiring line according to the number of gas detector probes and the position of the detected gas, which is very simple, only need to be connected in series, and use the junction box to connect the probes one by one.

3. Fixed gas detector and commissioning.

After selecting the location of the gas detector probe and the line routing, the rest is manual work, and only the power cord of the gas detector probe and line needs to be fixed. After the inspection, the power-on test. Due to the cumbersome debugging process of the gas detector, the Kurek gas detector has been debugged before leaving the factory, and the customer does not need to carry out any debugging operations.

The sensor of the gas detector needs to be replaced once in about 2-3 years.

The service life of the sensor of the gas detector should be replaced once in about 2-3 years.

In fact, there is no recommended maintenance schedule for sensor replacement for portable gas detectors. You shouldn't think of replacing the sensor as replacing your car's gas, it's more akin to filling up a gas tank. When the sensor is not sensitive enough for a successful calibration, it can be considered that the fuel tank is not sufficient and should be replaced.

As long as there is "oil in the tank", the sensor can be used normally.

Gas detectors have a standard method to confirm the status of the sensor and determine how much oil is left in the tank. It's called a retention value. The retention value is a measurement of the sensitivity of the sensor and is determined at the time of the tester calibration.

At the end of the tester calibration, the retained values for each sensor are displayed and stored in the instrument's calibration record. When the retained value of the sensor is less than or equal to 50% of the standard gas concentration, the sensor will fail to calibrate and must be replaced. When the retention value is between 50% and 70% of the standard gas concentration, the sensitivity of the sensor is on the edge and the sensor can be replaced to avoid a completely empty tank.

So the bottom line should be that. As long as your sensors have enough sensitivity or retention value to be successfully calibrated, they will work fine. There is no need to replace the sensor until the sensor calibration fails and the search group is no longer usable.

Keep an eye on the retention value, and you won't end up with a completely empty tank.

5 Maintenance of the product.

5-1 Precautions.

u The controller is a non-explosion-proof product, please do not install it in a place with explosion-proof requirements; It should be installed in the duty room or in a non-explosion-proof place where people often enter and exit indoors, and should be supervised by a special person.

u Do not power off the controller under normal monitoring status.

u Regularly test the working performance of the controller, whether there is any abnormality in the LCD display, status indication, function buttons and signal output, and the cycle is recommended to be once every three months.

u If there is a fault for maintenance, you need to confirm that the controller is powered off before removing it.

If the controller is idle for a long time, do not place it under harsh conditions in the external environment.

u Violent vibration should be avoided during transportation and storage of equipment;

5-2.Analysis and elimination of common faults.

When the controller sends out a fault alarm signal, the personnel on duty should first "silence", and then according to the reported fault address and fault type, according to the following **.

Fault phenomenon. Analysis of the causes of the original Wu's destruction.

Exclusion Method. Remark.

The e0" display board and output board do not communicate.

Check whether the cable connecting the display board to the output board is loose.

e1 "Current Address Detection Sensor Failure.

1.The sensor is rewired.

2.Replace the sensor.

The current address detector communication failure of e2" is faulty.

Check whether the connecting wire of the detector has fallen off or loosened.

E3 "Current Address Detector Memory Chip Failure.

The detector is returned to the factory for repair, or the detector motherboard is replaced.

E6" clock chip failure.

The controller clock chip is faulty and returned to the factory for repair.

E7" memory chip failure.

The controller memory chip is faulty and returned to the factory for repair.

E8" shorts the loop connecting the detector.

Check the bus circuit, there is a short circuit.