Shenzhen ZhongNuo Testing Technology Co., Ltd. specializes in the calibration, verification, and measurement services of gas alarms, combustible gas detectors, toxic and harmful gas detectors, and other equipment for various locations. We hold the necessary qualifications to serve nationwide, providing solutions to electrical safety and explosion-proof fire prevention issues for our clients, and supporting safe production.
Power-on inspection
The instrument should operate normally after being powered on, with the display sections being clear and complete. Check the alarm function and the alarm trigger values.
Alarm function and alarm action value verification
The instrument's sound and light alarm should function normally. Insulation resistance.
Insulation resistance for equipment using AC power should not be less than 20MΩ.

Measurement Instrument Control
Instrument control includes calibration, subsequent calibration, and in-use inspection.

Regular inspection items for environmental gas detection and alarm equipment in the workplace:
Alarm sound and light (if applicable)
2. Low response value
3. Indicating Error (for Gas Detectors/Gas Detector Alarms)
4. Instrument Drift (in Portable Instruments)
5. Alarm Error (for Gas Detection Alarm/ Gas Alarm)
6. Pump Suction Instrument Gas Sampling Distance and Flow Rate (for Pump Suction Instruments)
7. Power Supply (for battery-powered instruments)
8. Response Time
9. Status Indicator (with wireless communication capability)

Gas Detector Alarm Calibration Specification Requirements
Regulation 5.5 of the "Regulation for Inspection and Verification of Combustible Gas Detectors" (JJG693-2011) stipulates: The inspection period for combustible gas detection and alarm instruments: The inspection period for the instrument generally should not exceed one year. If there is any suspicion about the instrument's measurement data, or if the instrument has been replaced with major components or repaired, it should be promptly sent for inspection.
Section 3.5 of the "Regulations for the Use of Combustible Gas Detection and Alarm Systems" (SY6503-2000) stipulates: The combustible gas detection and alarm systems in use shall be calibrated regularly as required.
Occupational Health Service Establishment Standard for Toxic Gas Facilities (GBZ/T223-2009), Article 7.2.1 stipulates: Calibration of detection and alarm devices shall be conducted regularly according to the manufacturer's specified time and procedures.
Section 3.4 of the "Regulations for the Use of Combustible Gas Detectors" (SY6503-2000) stipulates: Combustible gas detectors for installation and use shall have measurement instruments manufactured by an institution recognized for their**explosion-proof performance**.
Shenzhen ZhongNuo Testing Technology Co., Ltd. is a third-party institution specializing in electrical safety, electrical explosion-proofing, gas alarms, and toxic gas detection equipment for regular inspections, metrological measurements, and calibration services. We hold the necessary qualifications to assist clients in solving fire and explosion prevention issues.