Industry Security Gas Detection Explosion Proof

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Gas Detector Instruction And Troubleshooting
1. FAQ for Explosion Proof Gas Detector
Can combustible gas detectors detect all combustible gases?
Yes.
How long can a combustible gas detector be used to monitor the minimum value of gas explosion and detect the comprehensive concentration of all combustible gases?
Under normal circumstances, it can be used for 3-5 years.
If the on-site environment is harsh, it will shorten the service life and require replacement within 1-2 years.
Can combustible gas detectors be linked to draught fan?
sure. It can not only drive draught fan, but also drive external devices such as solenoid valves and alarm lights.
Can combustible gas detectors and toxic gas detectors share the same host?
Yes.
What does the host do? Do I have to use it in combination?
The host can provide power to the detector, display real-time on-site concentration, and link with external devices. The host is installed in the central control room and duty room, so even if you are not on site, you can receive timely alarm notifications and handle the alarm situation in a timely manner.
Can the YA-D300 gas detector be used alone?
It can be used independently, powered by a 24V power supply, or alternatively powered by a 90-240V AC power supply.
Do I need to set the alarm value of the gas alarm myself?
It’s not necessary. The products are set up according to international standards before shipment. After receiving the goods, wiring and use it directly.
What materials are required for installation?
Strict explosion-proof places should prepare signal shielding wires and use galvanized pipes or steel pipe explosion-proof junction boxes for wiring.
How often is the gas detector calibrated?
Normally, it should be calibrated once a year.

Industry Gas Detector

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Gas Detector Industry Security

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2. Common faults and solutions of Gas Detector alarms
1) Fault: Gas detector cannot be turned on
Possible reasons include lack of power supply or wiring errors. Need to check if the power supply is connected and if it matches.
If there are still issues, the entire circuit needs to be checked.
2) Fault: Slow response of gas detector
Usually caused by sensor aging. Due to long-term exposure to gas or harsh environments, the catalytic substances in the components of gas alarms have aged and failed. Improper range adjustment may also result in slow response or inadequate indication.
The solution is to readjust the range or replace the sensor.
3) Fault: Too large error
During the use of gas alarms, the resistivity of platinum wires may change and cause errors.
When using gas alarms, electromagnetic interference should be prevented and installation in places with high temperature, humidity, and dust should be avoided as much as possible.
The solution is to introduce standard gas and calibrate and adjust according to the manufacturer’s instructions. If the displayed value cannot reach the standard gas concentration through calibration, it is judged that the sensor has failed and a new sensor needs to be replaced.
4) Fault: No response in standard sample gas detection
During regular calibration of the gas alarm, when a standard sample gas was introduced, the instrument displayed no response
Solution: First, check if the sensor component’s air vent is blocked. If no blockage occurs. It may be due to sensor aging or failure, or circuit malfunction. The sensor needs to be replaced.
5) Fault: Display “FAUL” fault
Connection error or sensor damage. The solution is to rewire or replace the sensor.
6) Controller connection abnormality
The reason is a wiring or circuit malfunction. Solution: Check the circuit, power supply, and fuse.
Note that if there are any unforeseeable faults during use, contact the manufacturer in a timely manner and do not operate blindly to prevent danger.
When choosing a gas alarm, be sure to choose a product with a certificate and guaranteed quality.

Quality Gas Detector

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Instruction of Gas Detector Gas Alarm.
Modular design, replaceable sensors and other modules.
Automatic reminder when the sensor's lifespan expires, no calibration or maintenance required, data storage records can be checked, infrared remote control operation to avoid exposure to toxic and harmful gases.

1. Display:
1. Field screen display: The field screen displays the concentration value detected by the current sensor in real-time;
2. Sound and light alarm: Three different frequencies of sound correspond to different working conditions;
3. LED: Three different colors of LED display the current status, green - normal, yellow - fault, red - alarm;
4. Infrared remote control: no need to open the cover, more convenient.
Function Description: 

1. Main Function Overview: 
 Three way relay, multiple communication methods, sound and light alarm, alarm recording, time display, infrared remote control 

2. Interactive Function: 

1) Infrared remote control: No need to open the cover operation, address, alarm value, calibration value, test value support digital key input;
2) Time: Real time display with an error within 30 seconds;
3) Relay: Three way (220V, 5A) normally open relay output, high-power devices can be externally extended with intermediate relays;
3. Alarm record:
1) Record the time when the alarm occurred;
2) Record the concentration value at the time of the alarm occurrence;
3) Can cyclically store 40 alarm records; When not entered into the query, only the alarm values and alarm times that occurred in the recent time are displayed.
3. Overview of the advantages of Yao'an combustible gas alarm:
1) Flexible communication methods with added LoRa and WIFI wireless transmission;
2) Upgraded to IP67 for dust and water resistance;
3) 40 alarm records are stored in a loop;
4) Infrared remote control operation (without opening the cover);
5) Three relay normally open output;
6) The detection data is more stable and accurate, and the sound and light alarm decibels are higher.
4、 Technical parameters:
1. Equipment parameter description: 

1) Power supply: DC24V， Support dual bus; Power: Toxic -3W, Flammable -4W.
2) Working temperature and humidity: Temperature range: -40~70 ℃, humidity range: ≤ 90% RH. 

3) Parameters: 
 Unit:% VOL,% LEL, umol/mol, mg/m3, ug/m3 (umo/mol and mg/m3 can be converted); Accuracy: 1, 0.1, 0.01; Gas range: can be selected according to customer requirements.
4) Implementation standard: GB15322.1-2003
2. Settings:
1) Internal settings: Gas type, gas unit, gas range, sensor range can be set;
2) Address setting: The address value can be any value between 1-255;
3) Alarm settings: switchable alarm types, set low and high limit values;
4) Time setting: Set the current time to better record operating conditions.
3. Zeroing, calibration, and testing:
1) Zeroing: Enter the zeroing interface to perform zeroing, which is easy and simple to operate;
2) Calibration: Upon entering the calibration interface, you can use the up and down keys to fine tune the calibration values, or enter numerical values using the numeric keypad; 

3) Testing (entering the testing interface): 

① 0 value (i.e. 4mA);
② Select the range and conduct tests at 0.2, 0.4, 0.6, 0.8, and 1x;
③ Adjust the current value by pressing the up and down keys for fine adjustment, or by typing numerical values on the numeric keypad to improve the linearity of 4-20mA.

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Misunderstandings in the use of gas detectors

Gas detectors are widely used in multiple industries for various purposes, and selecting the right one is crucial.
The common problems with using gas detectors are often caused by human error.
The following are common misconceptions:
Misconception 1
Think that a gas detector can detect any gas.
Actually, only one specific gas can be detected.
Even a multi in one gas detector.
It is also impossible to make a device that can measure any gas.

Misconception 2:
Testing with High Concentration Gases
For example, using a lighter to deflate and check whether the gas detector emits an alarm
Lighter gas is high-purity butane
Far beyond the range of the detector
May cause a decrease in the chemical activity of sensor components
Or reduce sensitivity and detection accuracy due to fire

Misconception 3: Random Installation
There are industry standards for the installation location of gas detectors
The installation height should be determined based on the specific gravity of gas and air
If the installation position is incorrect, the gas detector can not detect normally

Misconception 4:
Think that gas detectors do not require maintenance
Actually, regular calibration is required
And avoid dust blocking the air holes
Regular maintenance can extend the service life of gas detectors and save cost

Misconception 5:
Change the gas detector usage environment without authorization
For example, installing gas detectors for detecting hydrogen sulfide in pipelines without authorization,
The sensor of hydrogen sulfide gas detector is based on electrochemical principle. The more hydrogen sulfide content there is, the faster the consumption of electrolyte and the shorter the lifespan