Document ID: chunk:federal_register_of_legislation:F2023L01526:body:0:p46
Version: federal_register_of_legislation:F2023L01526
Segment Type: other
Provision Reference: 
Character Range: 129766–132640

± 20 per cent of full scale, over a 15-minute period for all operational ranges.

       4.3.1.3. The repeatability of the analyser expressed as one standard deviation shall be better than 1 per cent of full scale, at zero and at 80 per cent ± 20 per cent of full scale on all ranges used.

       4.3.1.4. The operational ranges of the analyser shall be chosen to give best resolution over the measurement, calibration and leak checking procedures.

4.3.2. Hydrogen analyser data recording system

       The hydrogen analyser shall be fitted with a device to record electrical signal output, at a frequency of at least once per minute. The recording system shall have operating characteristics at least equivalent to the signal being recorded and shall provide a permanent record of results. The recording shall show a clear indication of the beginning and end of the normal charge test and charging failure operation.

       4.4. Temperature recording

       4.4.1. The temperature in the chamber is recorded at two points by temperature sensors, which are connected so as to show a mean value. The measuring points are extended approximately 0.1 m into the enclosure from the vertical centre line of each side-wall at a height of 0.9 ± 0.2 m.

       4.4.2. The temperatures in the proximity of the cells are recorded by means of the sensors.

       4.4.3. Temperatures shall, throughout the hydrogen emission measurements, be recorded at a frequency of at least once per minute.

       4.4.4. The accuracy of the temperature recording system shall be within ±1.0 K and the temperature shall be capable of being resolved to ±0.1 K.

       4.4.5. The recording or data processing system shall be capable of resolving time to ± 15 seconds.

       4.5. Pressure recording

       4.5.1. The difference p between barometric pressure within the test area and the enclosure internal pressure shall, throughout the hydrogen emission measurements, be recorded at a frequency of at least once per minute.

       4.5.2. The accuracy of the pressure recording system shall be within ±2 hPa and the pressure shall be capable of being resolved to ±0.2 hPa.

       4.5.3. The recording or data processing system shall be capable of resolving time to ±15 seconds.

       4.6. Voltage and current intensity recording

       4.6.1. The charger voltage and current intensity (battery) shall, throughout the hydrogen emission measurements, be recorded at a frequency of at least once per minute.

       4.6.2. The accuracy of the voltage recording system shall be within ±1 V and the voltage shall be capable of being resolved to ±0.1 V.

       4.6.3. The accuracy of the current intensity recording system shall be within ±0.5 A and the current intensity shall be capable of being resolved to ±0.05 A.

       4.6.4. The recording or data processing system shall be capable