Table 1 Experimental measuring instrument and its main parameters.

From: Experimental study on variable frequency control and air leakage control of multi-fan combination in subway tunnels

Measurement parameters

Experimental equipment

Model

Range

Error limit

Wind speed

Anemometer

Ulied UT 362 H

0 ~ 30 m/s

± (4% of reading + 0.1) m/s

Wind sensor

Elektronik EE75

0 ~  10 m/s

± 0.1 m/s

Static pressure

Pressure sensor

Setra 261 C

0 ~  1000 Pa

± 5 Pa

power

Electricity meter

Hongrun HRPC213R01

0 ~ 12 kW

± 24 W

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