34:
This signal is often wired to an indicator that reads out locally, or remotely in a control room, and/or as a control (or feedback) signal to a valve, pump, or other control element to maintain a set pressure, or limit a maximum pressure. Typically, the signal is 4-20 mA DC loop current, where,
26:
To measure the pressure difference between a container (or vessel) and the surrounding atmosphere, you may connect 'Hi' port of the DP-cell to a fitting that enters the vessel, using suitable tubing. The 'Lo' port, you leave open to the atmosphere (open air, or possibly through a buffer or
35:
usually, 4mA represents the minimum differential pressure and 20mA represents the maximum differential pressure. . Alternatively, the signal may be a variable voltage, or digital information stream.
31:
chamber). The DP-cell will indicate the relative difference between the pressure of the vessel (container) and the atmospheric pressure.
94:
65:
86:
121:
116:
8:
90:
61:
110:
57:
20:
is a device that measures the differential pressure between two inputs.
28:
83:
Process automation handbook: a guide to theory and practice
54:Process control: modeling, design, and simulation
108:
51:
109:
80:
13:
14:
133:
74:
45:
1:
38:
7:
52:Bequette, B. Wayne (2003).
10:
138:
81:Love, Jonathan (2007).
122:Measuring instruments
96:978-1-84628-281-2
67:978-0-13-353640-9
129:
101:
100:
78:
72:
71:
49:
137:
136:
132:
131:
130:
128:
127:
126:
117:Pressure gauges
107:
106:
105:
104:
97:
79:
75:
68:
60:. p. 735.
50:
46:
41:
12:
11:
5:
135:
125:
124:
119:
103:
102:
95:
89:. p. 28.
73:
66:
43:
42:
40:
37:
9:
6:
4:
3:
2:
134:
123:
120:
118:
115:
114:
112:
98:
92:
88:
84:
77:
69:
63:
59:
58:Prentice Hall
55:
48:
44:
36:
32:
30:
24:
21:
19:
82:
76:
53:
47:
33:
25:
22:
17:
15:
111:Categories
39:References
29:desiccant
23:Example:
87:Springer
18:DP cell
93:
64:
91:ISBN
62:ISBN
113::
85:.
56:.
16:A
99:.
70:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.