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In order to accurately measure the flow rate of the fluid, the density of the fluid must be
compensated, and most fluid density varies with the pressure and temperature of the
working condition Varies with the change of the temperature, so the compensation of
fluid density can be converted into temperature and pressure compensation of the fluid.
According to different fluid media, media compensation methods are divided into: no
compensation, general gas, saturated steam, superheated steam, and natural gas.
·When the model is selected as [linear], when the medium is not compensated, the flow
coefficient K is set to 1, the upper volume limit in the volume configuration is set to the
volume flow value corresponding to the upper limit of the linear signal, and the lower
volume limit is set to 0 [if the flow rate If the meter output is the mass flow rate or the mass
flow rate is calculated by the meter, the medium density and flow / volume unit are both
involved in the calculation]. During media compensation, both density and unit are
involved in the calculation. At this time, the flow coefficient K should be calculated
according to the linear flow meter mass flow calculation formula.
When modifying the upper and lower limits of the range, press the [Menu key] to modify
the number of decimal points, and press the [Enter] key to enter the auxiliary screen for
parameter change operation.
Medium
Unit
When the system does not have temperature and pressure compensation, you can only
select [No Compensation] in the [Medium] configuration. At this time, you must also set
No compensation
When the measurement signal is small, the measurement error is large, especially below
1%, the accuracy will be greatly reduced, the engineering generally do zero processing,
that is, cut off the small flow.
3
3
3
3
3
m / h, m / min, m / s, L / h, L / min, L / s, t / h, t / min, t / s, Kg / h, Kg / min, Kg / s, Km / h, Nm /
3
h, KNm / h.
Units participate in calculations.
Resection
Range
The user-defined flow range, divided into upper and lower limits, can be freely
configured.
It can be seen from the common calculation formulas of flow rate that the flow rate of the
fluid has a proportional or square proportional relationship with the density of the fluid.
20
EN
7
0
1
7
8
7
2
.0
6
0
9
/2
0
1
8
C
H
/E
N
