GB/T 21254-2017Breath alcohol analyzer (English PDF)

3.1 Exhaled gas alcohol content detector

A device for measuring the ethanol content of exhaled deep lung gases under specified temperature, humidity and atmospheric pressure conditions.

3.2 Exhaled gas alcohol content

The amount of ethanol per liter of exhaled gas.

Note: The unit is mg/L.

3.3 Blood alcohol content

The amount of ethanol per 100 ml of blood is in mg/100 mL.

Note: Blood alcohol content is abbreviated as BAC.

3.4 Memory residual effect

The exhaled gas alcohol content detector inserts a high concentration B between two tests of the same concentration of low concentration ethanol gas.

Alcohol gas test, the difference between the two low concentrations of ethanol gas measured.

3.5 Drift

The degree to which the exhaled gas alcohol content meter measures the value of a given concentration of ethanol gas over a period of time.

3.6 Measurement mode

The mode of operation for normal measurements.

3.7 Maintenance mode

Work mode for instrument adjustment, calibration, and metrology verification.

3.8 Standby mode

The instrument is in a sleep state and can quickly switch to the operating mode of the measurement mode.

3.9 Exhalation gas volume effect

The extent to which the volume of exhaled gas affects the measurement results.

3.10 Breath duration effect

The extent to which the duration of exhalation affects the measurement results.

3.11 Warm-up time

The time from the start of the power to the completion of the warm-up and the ability to enter the measurement state.

4.1 General requirements

4.1.1 The surface of each component of the exhaled gas alcohol content detector (hereinafter referred to as "wine detector") shall be smooth and flat, and there shall be no obvious mechanical damage.

Damage and coating damage, the display should be clear, no defect; each control should be installed firmly and flexible.

4.1.2 The instrument shall have measurement mode, maintenance mode and standby mode, and ensure the consistency of measurement results in the measurement mode and maintenance mode.

4.1.3 The display interface and operation menu of the wine detector should be Chinese, and the displayed value is non-negative.

4.1.4 The wine tester shall have the function of operator registration and registration.

4.1.5 In the measurement mode, the unit of measurement results of the wine tester is expressed in mg/100mL (blood alcohol content, ie BAC); in maintenance mode, The measurement unit of the wine detector is expressed in mg/L (BrAC); the conversion relationship between BAC and BraC is BAC=BrAC×2200, The conversion relationship should be indicated on the surface of the wine detector or on the product instruction manual.

4.1.6 The time displayed during measurement shall not deviate from Beijing time by more than ±3 min; the time of measurement shall be displayed, stored, transmitted and Print should be exactly the same.

4.2 Voltage lower limit alarm

When the supply voltage is lower than the lower limit of the voltage specified by the wine detector, the wine detector should be able to issue an alarm signal.

4.3 Continuous measurement

A wine tester using a built-in power supply should be able to measure continuously for no less than 200 times.

4.4 Electrical safety

A wine detector powered by an AC power source shall meet the following requirements.

a) Insulation resistance. >=10Mohm;

b) Dielectric strength. >=1.5kV;

c) Leakage current. <=0.7mA.

4.5 Warm-up time

For wine testers that require preheating, the warm-up time should not exceed 15 minutes under the benchmark conditions.

4.6 Measurement results storage, printing and transmission

4.6.1 The measurement result of the wine tester should be able to be stored and generate a unique sequence number corresponding to the wine tester. The storage space of the wine tester should be guaranteed.

Store at least 8000 measurement results, and the stored measurement results should not be artificially modified.

4.6.2 The wine tester shall be equipped with a printing device. The printed content shall include at least the sequence number, time and measurement results of the measurement, and the printed test results.

It should be consistent with the displayed measurement results, and reserve the location of the test object and the operator's signature; as the traffic accident file, the shelf life Should meet the requirements of GA40.

4.6.3 The measurement results of the wine detector should be transmitted to the computer synchronously through the corresponding interface, and have the function of breakpoint retransmission.

4.7 Maximum allowable error

4.7.1 For type inspection, the maximum allowable error shall comply with the requirements of Table 1.

4.7.2 The allowable error of the wine tester during use is 1.5 times the maximum allowable error of the type test.

4.8 Repeatability

The repeatability of the wine tester should meet the requirements of Table 2.

4.9 Drift

4.9.1 Within 4h of the wine detector, the zero drift should be no more than 0.010mg/L.

4.9.2 Within 4h of the wine detector, the short-term drift of the 0.400mg/L measuring point should be no more than 0.010mg/L.

4.9.3 Within 60 days, the long-term drift of the 0.400mg/L measuring point should be no more than 0.020mg/L.

4.10 Memory Residual Effect

Between the two tests of a given low concentration of ethanol gas, an injection of 0.400 mg/L of ethanol gas higher than the original concentration, The difference between the two low-concentration gas measurements by the wine tester should be no more than 0.010 mg/L.

4.11 Zero

4.11.1 The wine detector should have an automatic zero reset function or check for zero before each measurement.

4.11.2 When the wine detector is reset to zero, in the measurement mode, when the residual concentration has not dropped to 0.01mg/L, it should not be tested; in maintenance mode Under the test, when the residual concentration has not dropped to 0.005mg/L, it should not be tested.

4.11.3 The wine detector shall have a zeroing time of less than or equal to 10 s at an ethanol gas concentration of 0.400 mg/L.

4.12 Measuring range

The measurement range of exhaled gas wine test concentration should be 0.000mg/L~2.000mg/L.

4.13 Resolution

The wine detector has a resolution of 1 mg/100 mL in the measurement mode and a resolution of 0.001 mg/L in the maintenance mode.

4.14 Display

4.14.1 Word height

The height of the measured value displayed on the display device should be no less than 5mm.

4.14.2 Unit height

The character height of the measurement result unit should be no less than 3mm.

4.14.3 The last bit is gone In the measurement mode, the calculated result should be rounded off.

4.14.4 Zero value display

In the measurement mode, when the measured concentration value is less than 0.020mg/L, it can be displayed as 0mg/100mL; in maintenance mode, When the concentration is less than 0.020mg/L, it can not be displayed as 0.000mg/L, and the measurement result should be displayed as it is.

4.15 Tamper Protection

4.15.1 Hardware Protection

The wine detector has a measuring performance hardware adjustment device, which should have protective measures and cannot be opened without authorization.

4.15.2 Software Tamper Protection

The wine detector has a measurement performance software adjustment function, and should have password protection measures, which cannot be adjusted without authorization.

4.16 Minimum expiratory volume

The minimum expiratory volume when sampling the wine detector is 1.2L. When the expiratory volume is less than 1.2L, the wine detector should not be sampled or analyzed.

4.17 Minimum exhalation time

The minimum exhalation duration for sampling by the wine tester is 3.0 s. When the duration of exhalation is less than 3.0s, the wine detector should not be sampled. analysis.

4.18 Exhalation interruption

When the expiratory flow is less than 0.10L/s, it should be regarded as an exhalation interruption and an alarm signal will be issued.

4.19 Expiratory resistance

The wine tester uses a blowpipe with a suitable diameter. When the exhalation flow rate is 0.20 L/s, the air pressure should not exceed 25 hPa.

4.20 Exhaled gas volume effect

When the exhaled gas volume changes within the specified range, the measurement error of the wine tester to the measured gas should meet the requirements of 4.7.

4.21 Exhalation duration effect

When the duration of exhalation changes within the specified range, the measurement error of the wine detector to the measured gas should meet the requirements of 4.7.

4.22 Anti-interference ability

4.22.1 Under the action of 0.5mg/L acetone and 0.2mg/L carbon monoxide, the indication value of the wine tester should be no more than 0.1 mg/L.

4.22.2 For the infrared wine detector, test with 0.400mg/L ethanol gas with a carbon dioxide volume concentration of 10%.

The measurement error of the measured gas should meet the requirements of 4.7.

4.23 Blowpipe

The wine detector should use a disposable blowpipe that meets hygienic conditions. The blowpipe should be packaged separately. The blowpipe should be replaced before each measurement; the wine tester should be used.

Use a one-way blowpipe to ensure that the tester does not inhale the residue in the measurement system.

4.24 Temperature resistance

4.24.1 Low temperature work

When the wine detector is at 0 °C, it should work normally. The allowable error should meet the requirements of 4.7. The storage, printing and transmission of the measurement results should be consistent with 4.6 requirements.

4.24.2 Low temperature storage

The wine detector should be able to withstand the -40 ° C low temperature storage test. After the test, the wine tester should be free of rust, cracks, peeling of the coating, etc.;

Clear; no loose parts in the fastening parts; no blistering, cracking and deformation of plastic parts; after 2 hours of recovery under the benchmark conditions, test again The test shall allow the error to meet the requirements of 4.7. The storage, printing and transmission of the measurement results shall comply with the requirements of 4.6.

4.24.3 High temperature work

The wine tester should work normally at 40 °C, and the allowable error should meet the requirements of 4.7. The measurement results should be stored, printed and transmitted. Meet the requirements of 4.6.

4.24.4 High temperature storage

The wine tester should be able to withstand the 70 °C high temperature storage test. After the test, the wine tester should be free of rust, cracks, peeling of the coating, etc.;

Clear; the fastening parts are not loose; the plastic parts should be free of blistering, cracking and deformation; after 2 hours of recovery under the benchmark conditions, the test is carried out.

The allowable error shall comply with the requirements of 4.7, and the storage, printing and transmission of measurement results shall comply with the requirements of 4.6.

4.25 Resistance to heat and humidity

The two-cycle alternating damp heat test shall be carried out according to the method of 5.27. After the test, the wine tester shall be free from rust, cracks, peeling of the coating layer, etc.;

The characters and signs should be clear; the fastening parts are not loose; the plastic parts should be free of blistering, cracking and deformation; recover 1h under the benchmark conditions After that, the allowable error should meet the requirements of 4.7, and the storage, printing and transmission of measurement results should meet the requirements of 4.6.

4.26 Anti-vibration performance

The vibration test shall be carried out according to the method of 5.28. After the test, the mechanical components of the wine tester shall not have cracks, obvious deformation or loose fasteners.

The allowable error under the benchmark conditions shall comply with the requirements of 4.7. The storage, printing and transmission of the measurement results shall comply with the requirements of 4.6.

4.27 Anti-collision performance

The collision test shall be carried out according to the method of 5.29. After the test, the mechanical components of the wine detector shall be free of cracks and obviously deformed; the electrical components shall have no obvious position.

Move or fall off; the allowable error under the benchmark conditions should meet the requirements of 4.7, and the measurement results should be stored, printed and transmitted in accordance with 4.6. Requirements.

4.28 Anti-free fall performance (handheld)

The packaged wine tester in a non-working state was subjected to a free fall test with a drop height of 800 mm.

There should be no large deformation and damage in the packing; the instrument and accessories should not be deformed or loosened; no mechanical damage such as peeling of the coating; in the benchmark test The allowable error under the conditions shall comply with the requirements of 4.7, and the storage, printing and transmission of the measurement results shall comply with the requirements of 4.6.

4.29 Electrostatic discharge immunity

The wine detector performs the electrostatic discharge immunity test under the state of being turned on, and the electrostatic discharge immunity test level is 3, in the test and test.

The rear wine detector should not have an electrical fault and the function should return to normal after the test. The allowable error under the benchmark conditions should meet the requirements of 4.7.

Therefore, the storage, printing and transmission of measurement results should meet the requirements of 4.6.

4.30 Radio Frequency Electromagnetic Field Radiation Immunity

The wine detector performs radio frequency electromagnetic field radiation immunity test under the state of being turned on, and the radio frequency electromagnetic field radiation immunity test level is 3 levels.

There shall be no electrical faults in the wine tester during and after the test, and the function shall return to normal after the test. Allowable error under benchmark conditions In accordance with the requirements of 4.7, the storage, printing and transmission of measurement results shall comply with the requirements of 4.6.

5.1 Benchmark conditions

Unless otherwise stated, the tests were carried out under the following baseline conditions.

a) Temperature. 23 ° C ± 5 ° C;

b) Relative humidity. 50% ± 30%;

c) total hydrocarbon concentration in the environment. not more than 0.002 per thousand;

d) Electromagnetic field. There are no gas or electromagnetic fields around the normal operation of the wine detector.

5.2 Concentration conversion

The test gas concentration is converted according to the formula (1) in terms of 34 ° C and current atmospheric pressure. In the formula.

C1---The concentration of the test after conversion with standard ethanol gas, in milligrams per liter (mg/L);

C0---Ethanol standard substance concentration value, expressed in mole fraction, in micromoles per mole (µmol/mol or 10^-6 mol/ Mol); k --- constant, the value is 18.03 x 10^-6;

P --- The current atmospheric pressure in the calibration environment, in kilopascals (kPa).

5.3 General requirements inspection

Visually inspect the appearance and operation interface of the wine tester.

5.4 Voltage lower limit over-the-counter alarm function test

Connect the wine detector power supply (rated voltage value), use the voltage regulator to gradually reduce the voltage, when the voltage drops to the lower limit of the rated voltage, check Check if the wine detector has an alarm signal.

5.5 Continuous measurement test

Use a voltmeter to measure the voltage of the built-in power supply. When the power supply voltage is full voltage, use a zero-concentration gas and measure it once every 1 minute. After 200 measurements, check that the wine tester is working properly.

5.6 Electrical safety test

5.6.1 Insulation resistance test

5.6.1.1 Pretreatment

The wine detector is not powered and the switch is placed in the on position.

5.6.1.2 Test method

Apply 500V DC test voltage between the power conductive circuit and the externally accessible conductive part of the power supply, and stabilize after 5s. Insulation resistance.

5.6.2 Dielectric strength test

5.6.2.1 Pretreatment

Same as 5.6.1.1.

5.6.2.2 Test method

A test voltage of 1.5 kV is applied between the power conductive circuit and the housing and the externally accessible conductive portion. The test voltage waveform is Sine wave. During the test, the test voltage should be gradually increased to the specified value, kept at the specified voltage for 1 min, and then smoothly dropped to zero.

5.6.3 Leakage current test

5.6.3.1 Pretreatment

Place the AC-powered wine tester on an insulated work surface. It is operated by an isolation transformer at 1.1 times the rated supply voltage. Until the instrument temperature tends to balance.

5.6.3.2 Test method

Connect the power input of the wine tester to the AC output of the leakage current tester, the tester housing or the part to be tested and the leakage The test terminals of the flow tester are connected. […]