1. The surrounding environment should not have electromagnetic induction effects such as strong vibrations, shocks, major currents and sparks, and there should not be any substance in the air that would corrode the chromium, nickel, or silver plating, and there should not be flammable or explosive substances.
2. Continuous working temperature: -20℃ – ＋60℃;
3. Storage temperature: -40℃ – ＋80℃;
4. Relative humidity: 10% – 90%RH.

• Certification by the NEPSI (National Supervision and Inspection Centre for Explosion
• Protection and Safety of Instrumentation)
• Certification standards: GB 3836.1-2000 and GB 3836.4-2000
• Highest voltage (U m)=250V r.m.s.
• Certification parameters (between terminals 7 and 8):
• Uo=25V, Io=140mA, Po=875mW
• ⅡC：Co=0.11μF , Lo=1.32mH
• ⅡB：Co=0.33μF, Lo=3.96mH
• ⅡA ：Co=0.88μF, Lo=10.56mH

When connecting the isolation safety barrier with the field intrinsic safety instrument to form an intrinsic safety explosion-prevention circuit (intrinsic safety circuit) system, the following should be verified before using the system.

1. The field intrinsic safety instrument’s explosion-prevention level has to suit the usage environment, and the system has to be recognised by State-authorised explosion-prevention product certification organisations and be installed with a certified explosion-prevention instrument.
2. The certification parameters between the isolation safety barrier and field intrinsic safety instruments are explicit and compliant with requirement 12.2.5.1 of GB 3836.15-2000.
3. If there are non-explicit parameters, it will be necessary to verify the intrinsic safety circuit system with the State-authorised explosion-prevention product certification organisation.

The isolation safety barrier should be installed in a safe place, and be compliant with relevant regulations under the “Installation and Acceptance Standards for the Installation of Electrical Equipment in Explosion-prone and Fire-prone Environments” under the GB 50257-1996, “Section 15 of Electrical Equipment for Use in Environments with Explosive Gases: Electrical Installations in Danger Zones (except coal mines)” under the GB 3836.15 – 2000, “Section 13 of Electrical Equipment for Use in Environments with Explosive Gases: Inspection of Electrical Equipment for Use in Environments with Explosive Gases” under the GB 3836.13-2003, and “Section 16 of Electrical Equipment for Use in Environments with Explosive Gases: Inspection and Maintenance of Electrical Devices (except coal mines)” under the GB 3836.16-2006.