CBD-JJG657 exhaled alcohol detector calibration device Introduction: The exhaled gas alcohol content detector is the main law enforcement tool used by public security and transportation departments to quickly detect the alcohol content of vehicle drivers' breath on site. It is a measuring instrument that is subject to mandatory national verification. Our company, in accordance with the National Metrological Verification Regulations of the People's Republic of China JJG657-2019, uses the dynamic gas distribution method of GB/T 5275 Gas Analysis Dynamic Volume Method to prepare mixed gases for calibration. Ethanol standard gas and acetone standard gas are prepared using liquid ethanol and liquid acetone. Based on the structure and usage characteristics of the exhaled gas alcohol content detector, we have developed a metrological verification standard device CBD-JJG657 for exhaled gas alcohol content detector, which is suitable for GB/T 21254-2017 and OIML R-126 (2012) standards. The calibration device of CBD-JJG657 exhaled gas alcohol content detector mainly consists of a zero level air generator, an ethanol standard gas generator, an acetone standard gas generator, a temperature pressure flow control system, a differential pressure measurement system, a high-precision ethanol gas analyzer, a touch LCD central control system, carbon monoxide standard gas, and ethanol gas standard gas (primary standard substance). Technical parameters: Ethanol gas generator output concentration range: 0～2.0 mg/L Uncertainty of mass concentration of ethanol gas generator: ≤3.0%，k=2(@0.1 mg/L) ≤2.0%， k=2(@0.4 mg/L) ≤2.0%， k=2(@0.4 mg/L) Acetone gas generator output concentration: 5.0 mg/L Uncertainty of acetone gas generator mass concentration: ≤4.0%，k=2(@0.5 mg/L) Ethanol and acetone gas generators can work continuously for a long time: continuous operation>24 hours Verification port gas output flow rate: 0～36 L/min， Continuing Adjust Gas output flow fluctuation at the calibration port:<± 1% Verification port gas output flow accuracy: ± 0.3% RD Gas output temperature at the calibration port: 34 ℃± 0.5 ℃ Precision ethanol analyzer accuracy: ≤1.5%（@0.1 mg/L） ≤0.5%（@0.4 mg/L） ≤0.5%（@0.16mg/L） Atmospheric pressure measurement resolution: 1 hPa, MPE ± 2.5 hPa Temperature measurement range: 0-34 ℃, MPE ± 0.2 ℃ System operating voltage: AC220 50Hz System operating temperature: 5-40 ℃
Standard configuration
1. Verification device for exhaled gas alcohol content detector
2. Zero gas generator (optional)
3. Carbon monoxide cylinder gas (optional)
4. Ethanol cylinder gas (primary standard substance)
5. Ethanol standard gas generator or ethanol steel cylinder gas (optional)
6. Acetone standard gas generator or acetone steel cylinder gas (optional)
7. Stopwatch
8. Pressure reducing valve (optional)
9. Alcohol detector blowing tee connector
10. Polytetrafluoroethylene tube 2
