Model: CHD1200 Description: CHD1200 Mining Intrinsically Safe Resistance Tester MA number: MFA150190 KA number: KFA150020 ExibI: 320150858 ExiaII: CMExC17.4383 Patent No. ZL 2015 2 0977177.7 Introduction: 1. Applicable for grounding resistance and circuit resistance measurement in mining, industrial park, electricity, telecom, meteorological, oilfield, architecture and industrial motor equipment fields. 2. It can do measurement directly and no need to disconnect grounding wire or prepare auxiliary electrode. 3. Applicable for the combustible and explosive gas place. 4. Measured value is the comprehensive value of grounding body resistance and grounding wire resistance. Technology parameters: 1. Measuring range, resolution and intrinsic error. Measuring range Resolution Intrinsic error 0.1Ωï½?49.9Ω 0.1Ω ± (truth-valueÃ?1%+0.1Ω) 50.0Ωï½?99.5Ω 0.5Ω ± (truth-valueÃ?1.5%+0.5Ω) 100Ωï½?199Ω 1Ω ± (truth-valueÃ?2%+1Ω) 200Ωï½?395Ω 5Ω ± (truth-valueÃ?5%+5Ω) 400Ωï½?590Ω 10Ω ± (truth-valueÃ?10%+10Ω) 600Ωï½?1200Ω 20Ω ± (truth-valueÃ?20%+20Ω) 2. Resistance range: 0.01~1200Ω 3. Resistance resolution: 0.001Ω 4. Data storage: 99 sets 5. Sound-light alarm: yes. AL button to open or shut up. 6. Alarm critical value range: 1-199Ω 7. Power: 6V DC, alkaline dry cell 8. Working temperature and humidity: -20 to 55,10%RH to 90%RH. 9. LCD display size: 47mmÃ?28.5mm 10. Jaw size: long jaw 65mmÃ?32mm; circular jaw Φ32mm. 11. Jaw expanding size: long jaw 35mm; circular jaw 32mm. 12. Weight: long jaw 1160g; circular jaw 1120g (Battery included) 13. Dimension: long jaw: 285mmÃ?85mmÃ?56mm (LÃ?WÃ?H); Circular jaw: 260mmÃ?90mmÃ?66mm (LÃ?WÃ?H). 14. Explosion-proof sign: Exia II BT3 Ga 15. Degree of protection: double insulation 16. External magnetic field