- 75 -
4 *1.7513
Q
2
、
Select [KPa] for engineering unit
3
、
The lower range limit is 0.000, the upper range limit is 4.000
4, other parameters are set as needed [open the alarm group in the input
configuration of the flow operation channel is the flow alarm]
Flow accumulation:
1
、
model selection [differential pressure type]
2
、
open type select [local open]
3
、
Flow rate unit: [Kg/h]
4
、
Instrument coefficient K: [330.8]
5
、
The upper limit of the flow range, according to the actual mass flow
range setting
6, the lower limit of the flow range is generally taken as 0
7
、
Medium compensation selection [superheated vapor]
8
、
temperature channel: temperature channel is divided into given and
external complement, if you choose to give, enter the given temperature; if
you choose external complement, select the temperature channel number
in the following.
9
、
pressure channel: pressure channel is divided into given and external
complement, if you choose given, enter the given pressure afterwards; if
you choose external complement, select the pressure channel number
afterwards
10
、
standard density, standard temperature, standard pressure,
compression coefficient
Z
f
, compression coefficient
Z
n
ignored
Note:
Instrument coefficient calculation process.
By checking the table, the density of superheated steam is 1.7513 Kg/m3 at
230°C and 0.3 MPa (gauge pressure).
K
=
500 *1.7513
=330.8 Fill in the results of the calculation
Summary of Contents for HT R71
Page 22: ... 22 4 2 Usage Patterns ...