Shenzhen Zhongnuo Testing Technology Co., Ltd. specializes in the calibration, certification, and measurement services for gas alarms, combustible gas detectors, and toxic gas detection instruments for various locations. We offer nationwide services to address electrical safety and explosion-proof fire prevention issues for our clients, contributing to safe production.
Power-on inspection
After power is applied to the instrument, it should operate normally with clear and complete display. Check the alarm function and alarm trigger values.
Alarm function and alarm action value verification
The instrument's acoustic and visual alarms should be functioning normally. Insulation resistance
Insulation resistance for equipment using AC power should not be less than 20MΩ.

Regular Inspection Items for Environmental Gas Detection and Alarm Equipment in Workplace Operations:
Alarm sound and light (if applicable)
2. Small response value
3. Indication Error (for Gas Detectors/Gas Detector Alarms)
4. Instrument Drift (in Portable Instruments)
5. Alarm Error (for Gas Detection Alarm/ Gas Alarm)
6. Pump-actuated instrument gas collection distance and flow rate (for pump-actuated instruments)
7. Power Supply (for battery-powered instruments)
8. Response Time
9. Status Indicator (with Wireless Communication Function)

How often should various gas detectors be calibrated and verified?
Instrument recalibration is typically every 1 year, determined by the submitting unit based on actual usage. During the secondary calibration process, if there are any doubts about the instrument's test data, or if the main components of the instrument are replaced, or if recalibration is needed after repairs.

Measurement Equipment Control
Instrument control includes calibration, follow-up calibration, and in-service inspection.
Shenzhen ZhongNuo Testing Technology Co., Ltd. is a third-party institution specializing in electrical safety, electrical explosion-proof, gas alarm, and toxic and harmful gas alarm instrument periodic verification, metrology, and calibration services. We are qualified to address fire and explosion prevention issues for our clients.