Detailed information

- Pressure Test:
i) choose same size connectors, push control valve (1) clamp water meters;
ii) turn on ball valve (2), turn on ball valve (3), turn on ball valve (4), turn on ball valve (7);
iii) twist pressure test handle (6) to loose, wait 20 seconds, then turn off ball valve (7), turn off ball valve (4), then turn off ball valve (3);
iv) twist pressure test handle (6) to close slowly, watch pressure gauge (8), till the requested pressure, then turn off needle valve (5), wait the requested pressure test time;
v) finish pressure test, turn off ball valve (2), turn off ball valve (4), turn off ball valve (7), turn on ball valve (3), reduce pressure to zero;
　
if only do pressure test, then pull control valve (1), release water meters; or continue
　
- Flow Rate Error Test:
i) choose same size connectors, push control valve (1) clamp water meters;
ii) turn on ball valve (2), turn on ball valve (3), turn on ball valve (4), turn on ball valve (7);
iii) twist pressure test handle (6) to loose, wait 20 seconds, then turn off ball valve (7), turn off ball valve (4), then turn off ball valve (3);
iv) twist pressure test handle (6) to close slowly, watch pressure gauge (8), till the requested pressure, then turn off needle valve (5), wait the requested pressure test time;
v) finish pressure test, turn off ball valve (2), turn off ball valve (4), turn off ball valve (7), turn on ball valve (3), reduce pressure to zero;

WORKING PRINCIPLE:
        Permissible error:
        From Qt to Qmax both inclusive: ±2%
        From Qmin to Qt both exclusive: ±5％
       
Formula to calculate error:
        Error = (V2-V1)/V1 x 100% of which
        V2: Volume shown by the water meter(s)
        V1: Volume shown by the Volume tank