Sentinel LNG User’s Manual
175
Chapter 7. HART Communications
7.4.2 Host Interface
7.4.2.1
Analog Output
The
Sentinel LNG
is equipped with a single 4-20 mA output, which can be configured using software to supply 24-volt
power internally (active), or to regulate current from an external source (passive). When set to either mode it will
support the HART communication channel.
7.5 Device Variables
The quantity and complexity of flow rates, secondary measurements and diagnostics in the list precludes
elaboration within the FDS. Refer to Chapter 3,
Operation
, for more information about each parameter. All
Sentinel
LNG
Device Variable Codes are tabulated in Table 14 below.
Direction
Values
(percent of range)
Values (ma or V)
Linear Over-Range
Down
–0.6% ± 1.0%
3.89 to 3.92mA
Up
+105.0% ± 1.0%
20.64 to 20.96mA
Device Malfunction
Indication
Down: less than
–1.0%
3.84mA
Up: greater than
+110.0%
21.6mA
Maximum Current
+112.5%
22.0mA
Multi-Drop Current Draw
4.0mA
Lift-Off Voltage
4.5V
Device Variable Code
Decimal (Hex)
Device Variable
Classification
Code
Measurement
Comp
Ch. 1
Ch. 2
Ch. 3
Ch. 4
Code
Classification
Velocity
0 (00)
48 (30)
96 (60)
144 (90)
192 (C0)
67
Velocity
Volumetric
1 (01)
49 (31)
97 (61)
145 (91)
193 (C1)
66
Volumetric Flow
FWD Total
2 (02)
50 (32)
98 (62)
146 (92)
194 (C2)
68
Volume (FWD)
REV Total
3 (03)
51 (33)
99 (63)
147 (93)
195 (C3)
68
Volume (REV)
Totl. Time
4 (04)
52 (34)
100 (64)
148 (94)
196 (C4)
70
Time
Mass Flow
5 (05)
53 (35)
101 (65)
149 (95)
197 (C5)
72
Mass Flow
FWD Mass
6 (06)
54 (36)
102 (66)
150 (96)
198 (C6)
71
Mass (FWD)
REV Mass
7 (07)
55 (37)
103 (67)
151 (97)
199 (C7)
71
Mass (REV)
EnergyRate
8 (08)
56 (38)
104 (68)
152 (98)
200 (C8)
79
Power
FWD Energy
9 (09)
57 (39)
105 (69)
153 (99)
201 (C9)
77
Energy (FWD)
REV Energy
10 (0A
58 (3A)
106 (6A)
154 (9A)
202 (CA)
77
Energy (REV)
Reynolds #
11 (0B)
59 (3B)
107 (6B)
155 (9B)
203 (CB)
0
Not Classified
K(RE)
12 (0C)
60 (3C)
108 (6C)
156 (9C)
204 (CC)
0
Not Classified
CTL
13 (0D)
61 (3D)
109 (6D)
157 (9D)
205 (CD)
0
Not Classified
CPL
14 (0E)
62 (3E)
110 (6E)
158 (9E)
206 (CE)
0
Not Classified
CTPL
15 (0F)
63 (3F)
111 (6F)
159 (9F)
207 (CF)
0
Not Classified
Soundspeed
16 (10)
64 (40)
112 (70)
160 (A0)
208 (D0)
67
Velocity
Up Transit
17 (11)
65 (41)
113 (71)
161 (A1)
209 (D1)
70
Time
Dn Transit
18 (12)
66 (42)
114 (72)
162 (A2)
210 (D2)
70
Time
DeltaT
19 (13)
67 (43)
115 (73)
163 (A3)
211 (D3)
70
Time
Содержание Sentinel LCT
Страница 2: ......
Страница 4: ...ii no content intended for this page...
Страница 6: ...Preface iv Sentinel LNG User s Manual...
Страница 12: ...Contents x Sentinel LNG User s Manual...
Страница 26: ...Chapter 1 Features and Capabilities Sentinel LNG User s Manual 14...
Страница 178: ...Chapter 5 Using PanaView 166 Sentinel LNG User s Manual...
Страница 184: ...Chapter 6 MODBUS Communications 172 Sentinel LNG User s Manual...
Страница 202: ...Chapter 7 HART Communications 190 Sentinel LNG User s Manual...
Страница 220: ...Chapter 9 Troubleshooting 208 Sentinel LNG User s Manual...
Страница 222: ...Appendix A Menu Maps 210 Sentinel LNG User s Manual...
Страница 230: ...Appendix A Menu Maps Sentinel LNG User s Manual 218...
Страница 232: ...Appendix B CE Mark Compliance and High Noise Areas 220 Sentinel LNG User s Manual...
Страница 236: ...Appendix C Data Records 224 Sentinel LNG User s Manual...
Страница 240: ...Appendix C Service Record 228 Sentinel LNG User s Manual...
Страница 244: ...Index 232 Sentinel LNG User s Manual...
Страница 246: ...Warranty 234 Sentinel LNG User s Manual no content intended for this page...
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