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CTL 251B 校准验收国际标准决议


CTL PROVISIONAL DECISION SHEET
Standard(s): Generality Subclause(s): --No. Year PDSH 2009 251B Developed by: WG4 – WG1 Key words: - Measuring range - Accuracy - Instrument To be approved

at the 46th CTL Plenary Meeting, in 2009

Category: Subject:

Various and General Measurement accuracy

Instrument Accuracy Limits
Measurement values stated in a CB Test Report shall be made with instruments with accuracies within the limits stated below. These values apply unless more stringent requirements are given in the reference standard.

Parameter
Voltage
- Up to 1000 V

Range
up to 1 kHz 1kHz up to 5 kHz 5 kHz up to 20 kHz 20 kHz and above dc up to 20 kHz 20 kHz and above dc up to 60 Hz 60 Hz up to 5 kHz 5 kHz up to 20 kHz 20 kHz and above dc up to 5 kHz 5 kHz up to 20 kHz 20 kHz and above

Instrument accuracy of Measuring Range
± 1,5% ± 2% ± 3% ± 5% ± 3% ± 5% ± 1,5% ± 2,5% ± 3,5% ± 5% ± 2,5% ± 3,5% ± 5% ± 3,5% ± 5% ± 3% ± 3% ± 5% ± 0,05

- 1000 V and above

Current
- Up to 5 A

- 5 A and above

Leakage current
- up to 30 mA - 30 mA and above 50/60 Hz 50 Hz - 5 kHz up to 1 W 1 W up to 3 kW 3 kW and above

Power (50/60 Hz)

Power Factor (50/60 Hz) Frequency Resistance
up to 10 kHz 1 m? up to 100 m? and above 1 M? up to 1 T? above 1 T? for all other cases

± 0,2% ± 5% ± 10% ± 3%

Parameter
Temperature
1,2

Range

Instrument accuracy of Measuring Range
± 2°C ± 3% ± 3°C ± 5% ± 10 ms ± 1% ± 0,05 mm ± 0,1 mm ± 0,5% ± 1% ± 2% ± 5% ± 6% ± 10% ± 10% ± 1 degree

below 100° C 100° C up to 500° C - 35°C down to – 50°C

Time

10 ms up to 200 ms 200 ms up to 1 s 1 s and above up to 1 mm 1 mm up to 25 mm 25 mm and above above 10 g and up to 100 g 100 g up to 5 kg 5 kg and above for all values for all values

Linear dimensions

Mass

Force Mechanical energy Torque Angles Relative humidity Barometric air pressure Gas & fluid pressure
1

30% to 95% RH

± 6% RH ± 10 kPa

for static measurement

± 5%

Thermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, “T” and “ J”, premium grade, are recommended.
2

Not for measurements related to relative humidity.


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