The cause of inconsistency between field and remote flow meter
If the remote instrument shows exactly the same as the field instrument, it needs to be transmitted in the same way as the communication.
Generally there are two reasons: 1., the current settings are different (see the flow range and current settings corresponding). 2., the current output has normal attenuation, but not very large, can increase the current or the diameter of the cable to solve the problem of error. Beijing Wantong energy ring
DSM series differential pressure transmitter 1, DCS system and the orifice meter only need a prescription, can not prescribe or is not a prescription;The lower limit of 2, set on the DCS 4mA 0 and the corresponding value should correspond to differential pressure flow rate of 0; the upper limit corresponding to the maximum differential pressure value and corresponding scale calculation on flow orifice plate
Is the meter indicates the instantaneous flow and cumulative flow, if using 4-20mA remote signal or pulse signal, remote meter there will be some errors in the conversion, resulting in inconsistent instantaneous flow (usually less), and 4-20mA signal accumulation and accumulation field calculation will be completely different, there is not only the error caused by the the starting point of the accumulation caused by different.
