1. Frequently encountered fault conditions Sometimes all temperature sensor data are abnormal or hopping, or the direct change of temperature and ground temperature, ground and shallow, deep ground temperature is not reasonable. For example, the midday temperature in the summer is close to the ground temperature, or the ground and shallow and deep ground temperatures are not significantly decreasing in turn. Inspection Camera is applicable to a wide range of industrial sectors such as special inspection,power,automobile,petrochemical,machinery,pipes,container manufacturing,Inspection camera suitable for small spaces video detection. Inspection Camera Inspection Camera,Borescope Camera,Endoscope Camera,Engine Inspection Camera Zhengzhou Runde Dellonscope Co.,Ltd. , https://www.china-borescope.com
Loose ground temperature field is likely to cause abnormal ground temperature data. First, because the ground temperature field is loose and the soil is soft, the ground and 5cm ground temperature sensor are close to each other. Secondly, in the process of loose ground temperature field, it is easy to hit the sensor and cause data jump.
The frequent occurrence of ground temperature is a problem with all the ground temperature or all temperature: the ground temperature value has a discontinuous jump; the ground temperature value is low or high; the ground temperature value is -24.6 °C or maintain a certain value for a long time.
2, the cause of the impact and troubleshooting points of the various temperature sensor data are abnormal, cut and cable length, it may be that the multi-channel temperature switch board is broken through the short circuit, after the replacement will return to normal.
The ground temperature is obviously high, which may be due to poor contact between the ground temperature sensor and the QL150, or damage to the line. The ground temperature is obviously too small, which may be caused by a bite of the cable and a certain degree of short circuit.
Fixed solution steps: determine if the sensor is damaged; check the signal cable for open circuit; and measure whether the CD4067BF in the external transfer box is damaged. Steps to resolve unstable jumps: Check the ground temperature sensor seal, which may be the cause of water ingress. All the temperature is not normal. Steps: Check if the CD4067BF in the external transfer box is damaged. The 7209A/D chip on the digital board of the measuring collector is damaged.
A temperature sensor indicates an abnormal value: the sensor can be taken out, and the dry and wet bulb thermometer is soaked in the water, and then the reading is compared. If the proximity is similar, the sensor is normal; or the abnormal sensor is connected to the normal line. Whether the temperature value is normal or not is a problem with the sensor. Normal is a line problem.
The following measures are often used in routine maintenance:
Alternate method: A common fast and efficient method, provided that there are spare parts.
Exclusion method: Start with a device that can be determined to be ok, gradually eliminate the good equipment, and get the problematic equipment.
Test method: Use a multimeter to test the suspected equipment for resistance, voltage and other factors to find the fault location.
The taboos in maintenance must not be charged with the maintenance of the collector, plugging and unplugging cables; no hardware replacement, installation of sensors and other hardware.
The temperature sensor maintenance should pay attention to whether the shallow bracket is flush with the ground every day. Is the 0 cm ground temperature sensor half buried? If there is wind or rain, check whether the ground temperature field changes, if any, recover in time; Check the tightness of the transfer box to see if there is any water on the box and if the exposed cable is damaged.
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