Mining Intrinsic Safe Resistance Tester

Model: CHD1200 Description: CHD1200 Mining Intrinsic Safe Resistance Tester MA number: MFA150190 (National safety sign for coal mining products). KA number: KFA150020 (National safety sign for mining products). ExibI: 320150858 (Intrinsic safe and explosion-proof products certificate) 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.   Measure range Resolution Intrinsic error 0.1Ω～49.9Ω 0.1Ω ± (truth-value×1%+0.1Ω) 50.0Ω～99.5Ω 0.5Ω ± (truth-value×1.5%+0.5Ω) 100Ω～199Ω 1Ω ± (truth-value×2%+1Ω) 200Ω～395Ω 5Ω ± (truth-value×5%+5Ω) 400Ω～590Ω 10Ω ± (truth-value×10%+10Ω) 600Ω～1200Ω 20Ω ± (truth-value×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: 47mm×28.5mm 10. Jaw size: long jaw 65mm×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: 285mm×85mm×56mm (L×W×H); Circular jaw: 260mm×90mm×66mm (L×W×H). 14. Explosion-proof sign: Exia II BT3 Ga 15. Degree of protection: double insulation 16. External magnetic field <40A/m; external electric field <1V/m. 17. Single measurement time: 0.5s 18. Measuring frequency of resistance: >1 KHz.