Encountering unstable signals or data deviation during the installation of the DCT1158C wall-mounted sensor？Xi'an Shenghongchuang Instrument Co., Ltd. has compiled 12 typical fault solutions for wall-mounted ultrasonic flow sensors such as the SCL series、BLS、BYLDN-1 and other models，helping technical personnel quickly locate core issues such as pipeline matching and power supply interference。

1、Common installation issues of wall-mounted ultrasonic flow sensors

In the field of flow control equipment，the installation quality of wall-mounted ultrasonic flow sensors directly affects measurement accuracy and equipment service life。According to technical service data from Xi'an Shenghongchuang Instrument Co., Ltd.，common issues with models such as DCT1158C、SCL-80 are concentrated in three scenarios：signal attenuation caused by poor pipeline matching（accounting for 42%）、data jumps caused by power supply interference（31%）、zero drift caused by changes in ambient temperature and humidity（27%）。For example，when using the domestic HQ1300F5 level transmitter with LCD display explosion-proof level sensor in a petrochemical project，the diaphragm was clogged because the crystallization characteristics of the medium were not considered，and similar issues also require attention during the installation of ultrasonic flowmeters。

1.1 Troubleshooting unstable signal issues

When signal fluctuations occur in models such as SCL-60/BYLDN-1-G，diagnosis is recommended according to the following steps：first check whether scaling of ≥1mm exists on the inner wall of the pipeline（must meet the cleanliness requirements of ISO 10715）；second confirm whether the sensor installation spacing matches the outer diameter of the pipeline（DCT1158C requires the spacing coefficient to be 0.96-1.04 times the pipe diameter）；finally test the grounding resistance of the shielded cable（should be ≤4Ω）。Xi'an Shenghongchuang's engineering cases show that in a power plant project，by switching to a 316L stainless steel flange-type mounting bracket，the signal stability of SCL-62 was improved by 67%。

2、Technical parameters and performance optimization solutions

A comparison of the technical specifications of the SY-CSB series and BLS models shows that installation requirements vary significantly for equipment with different measuring ranges：

For the application of DCT1258 in high-temperature environments，a split-type installation solution is recommended：control the distance between the transmitter and the sensor within 3 meters，and use polyurethane shielded cable（attenuation rate ≤0.2dB/m）。This is consistent with the explosion-proof design concept of the HQ1300F5 level transmitter in petrochemical scenarios，both requiring consideration of IP65 protection rating and the ability to withstand mechanical vibration of 20g。

3、Industry standards and certification requirements

Models such as BYLDN-1-B produced by Xi'an Shenghongchuang have all passed the following certifications：GB/T 18660-2018《Measurement of fluid flow in closed conduits》standard、JJG 1030-2007 ultrasonic flowmeter verification regulation。Especially in the field of municipal water supply，it is also necessary to meet the signal anti-interference requirements of the EN 1434-2015 heat meter standard。We recommend that technical evaluators focus on checking two indicators during model selection：long-term stability（should be ≤±0.2%FS/year）and response time（DCT1158C can reach ≤1ms）。

4、Why choose Xi'an Shenghongchuang

As a national-level high-tech enterprise in Xixian New Area，we provide：1) 18 years of focus on flow sensing technology R&D，2) full-series products certified by CNAS laboratories，3) a 72-hour rapid-response service network。Whether it is the pipeline matching solution for SCL-80，or the explosion-proof retrofit requirement for the domestic HQ1300F5 level transmitter，our engineering team can provide customized solutions。Contact a technical consultant now to obtain the DCT1158C installation specification white paper。

Further reading：Typical application scenarios

In a wastewater treatment plant case，the BLS model achieved stable operation through the following configuration：① added a signal amplifier to compensate for long-distance transmission loss ② used a cast aluminum housing to resist H2S corrosion ③ configured an automatic temperature compensation algorithm。This solution is also applicable to SY-CSB-1000 equipment in hydrological monitoring stations，and its core principle is similar to the design of the three-stage lightning protection module of HQ1300F5。