1. Brief introduction
This test bench adopts sonic nozzle as standard reference and minus pressure principle, following International standards ISO9300, it consists of calculating unit, testing table, dynamical system, sampling and controlling system and administrative software, etc. The testing result can be saved and printed out.

The tested meter is DN25-DN300mm, flow range 2.5m3/h~6500m3/h. It is an ideal testing equipment for gas meter factory or laboratory.

2. Specification
a. Accuracy : ≤0.2%
b. Tested meters: 1pc
c. Testing media: clear air.
e. Tested meter: DN25-DN300 rotary gas meter, vortex gas meter, turbine gas meter and other gas flow meter.
f. Manometer accuracy: ≤0.2%;
thermometer accuracy: ≤0.5%;
hygrometer: ≤3.5%
g. Material: flow tube, flange and valve are stainless steel, others are carbon steel.
h. Working condition:
environment temperature: 0-38℃
  relevant humidity: 5%～98%
  atmospheric pressure: 86kPa～106kPa
i. Power source: 3×380V, 50Hz, 250KVA