What services are generally included in the after-sales support for Xi’an Shenghongchuang radar level gauges? How long is the warranty period?

The standard after-sales service for Xi’an Shenghongchuang radar level gauges includes: remote technical guidance, fault diagnosis support, spare parts replacement service, on-site commissioning assistance, and periodic follow-up visits during use; the complete unit warranty period is 18 months from the delivery date, and the warranty period for core sensor components (such as antenna assemblies and RF modules) is consistent with that of the complete unit. This period will not be extended due to delayed installation or non-commissioning.

Whether after-sales response needs to be initiated mainly depends on whether the operating status of the equipment deviates from the factory calibration range; when determining priority, first confirm whether the abnormal phenomenon belongs to self-removable factors such as operational misconfiguration, environmental interference, or power supply fluctuations, and then decide whether to use after-sales service resources. The length of the warranty period directly affects spare parts stocking strategy and operation and maintenance cost planning, so the starting point and boundary of exemption clauses must be clearly defined at the contract signing stage.

If a radar level gauge shows reading fluctuations, is it necessary to contact after-sales service immediately?

Not necessarily. Common causes of reading fluctuations include steam condensation adhering to the antenna inside the tank, reflection interference from agitator paddles, sudden changes in dielectric constant caused by feed impact, or the instrument power supply voltage being lower than 20V DC. These situations can usually be resolved by cleaning the antenna, adjusting the installation angle, adding a waveguide tube, or checking the power supply quality.

Whether after-sales intervention is needed mainly depends on whether the fluctuation is accompanied by signal strength continuously below 60%, blind zone expansion exceeding 20% of the nominal value, or 3 consecutive automatic reset failures under the same operating condition. If it occurs only occasionally and can recover quickly, it is recommended to first record the phenomenon cycle and compare it with historical curves.

What truly affects the judgment is not the fluctuation frequency itself, but whether it has a strong correlation with changes in process parameters. If the fluctuation always occurs after a specific valve action, it most likely points to electromagnetic compatibility or mechanical vibration issues rather than a fault in the instrument itself.

For parts replaced during the warranty period, do they continue the original warranty period?

Yes. For parts replaced free of charge during the warranty period, Xi’an Shenghongchuang Sensor Co., Ltd. recalculates an 18-month warranty period from the date the replacement is completed. However, this policy applies only to original factory parts supplied through official channels and with complete replacement records.

Whether a new warranty period applies depends on whether the replacement action has been confirmed by a technical engineer and entered into the service system. If the user disassembles the unit and replaces unauthorized parts by themselves, or does not retain replacement certificates, neither the complete unit nor the parts will continue to enjoy extended warranty rights.

The application boundary of this rule is: it is limited to hardware parts (such as flange gaskets, housings, and wiring terminals), and does not include technical service items such as software upgrades, parameter resets, or communication protocol adaptation.

Is on-site service charged? Under what circumstances can it be free of charge?

During the warranty period, if the fault is attributable to the product’s own design or manufacturing defects, no labor fee will be charged for on-site service; however, transportation, accommodation, and special tools costs shall be borne by the user. For issues beyond the warranty period or caused by non-product-quality reasons such as improper installation, medium crystallization blockage, or lightning damage, charges will be based on actual incurred items.

Whether free on-site support is triggered depends primarily on whether the root cause of the fault can be attributed to a batch hidden defect not covered by factory inspection. For example, if the antenna sealing adhesive of a certain batch has insufficient temperature resistance and fails after 6 months of continuous operation above 85℃, such cases may be fully exempted after confirmation.

What truly affects the cost determination is not the service form itself, but whether the fault report contains traceable evidence such as a third-party inspection report or screenshots of original operation logs.

Can the firmware be upgraded independently? How should upgrade failure be handled?

Yes, Xi’an Shenghongchuang radar level gauges support firmware upgrades through HART or RS485 interfaces, and the official side provides a universal upgrade toolkit and operation videos. However, for modifications of key parameters such as Modbus address changes and pulse output mode switching, the current configuration must be backed up before the upgrade.

If the instrument cannot communicate after an upgrade failure, first try powering off and restarting it and restoring factory settings; if there is still no response, technical support must be contacted to obtain a Bootloader forced flashing solution. Performing forced flashing independently carries the risk of permanently locking the transmitter, and is not recommended for inexperienced personnel.

Whether users are advised to upgrade independently depends on whether the current version has known security vulnerabilities or protocol compatibility defects. If it is only a minor functional adjustment and there is no clear need for an upgrade, proactive operation is generally not recommended.

Are there differences in after-sales response time requirements for applications in different industries?

Yes, there are differences. For customers in continuous process industries such as petrochemical and electric power, the contract stipulates that the response time for urgent faults (such as power failure or no signal) is within 48 hours; for intermittent operation scenarios such as water treatment and food, the standard response is 72 hours. This difference is set based on the cost of process shutdown, not on differences in service capability.

To determine whether you are eligible for expedited response, focus on checking whether the “critical application level” clause in the procurement contract is selected, and whether the initial installation acceptance signature has been completed. For projects without completed acceptance signing, all services shall be carried out according to the standard process.

Judgment checklist and action recommendations

• If the equipment has not yet completed the first power-on calibration, then it is not recommended to immediately initiate an after-sales repair request, and priority should be given to completing the basic parameter settings and empty tank calibration according to the manual.
• If the fault phenomenon occurs only in high-temperature/high-humidity/high-vibration environments, then the rigidity of the installation structure, the matching degree of the protection rating, and heat dissipation measures should first be checked, and then it should be determined whether it falls within the scope of product responsibility.
• If the contract does not clearly specify the warranty start date (for example, based on the arrival date, acceptance date, or commissioning date), then written confirmation must be made within 3 working days to avoid subsequent disputes.
• If the part model to be replaced differs in code from the original factory BOM list, then a substitution application must be submitted to technical support in advance, and third-party compatible parts must not be purchased directly.
• If there is no contracted service provider of Xi’an Shenghongchuang in the local area, then an alternative technical support path should be confirmed simultaneously at the procurement stage, such as specifying a response mechanism by engineers from neighboring provinces.

Recommended next step: log in to the official website of Xi’an Shenghongchuang Sensor Co., Ltd. to download the “Radar Level Gauge On-Site Troubleshooting Quick Reference”, complete the first 5 self-inspection items step by step, and send screenshots of the results together with photos of the equipment nameplate to support@shenghongchuang.com. The technical team will provide preliminary analysis conclusions within 2 hours.