Emerson MICRO MOTION 2700 Manual de instalación Pagina 96
- Pagina / 264
- Tabla de contenidos
- SOLUCIÓN DE PROBLEMAS
- MARCADORES
Valorado. / 5. Basado en revisión del cliente
86 Transmitter Configuration and Use: Series 1000 and 2000 Transmitters
Optional Configuration continued
8.6 Configuring cutoffs
Cutoffs are user-defined values below which the transmitter reports a value of zero
for the specified process variable. Cutoffs can be set for mass flow, volume flow, or
density.
Note: The density cutoff is available only with core processor software 2.0 or above
and MVD software rev 3.0 or above.
See Table 8-4 for cutoff default values and related information. See Sections 8.6.1
and 8.6.2 for information on how the cutoffs interact with other transmitter
measurements.
8.6.1 Cutoffs and volume flow
The mass flow cutoff is not applied to the volume flow calculation. Even if the mass flow drops below
the cutoff, and therefore the mass flow indicators go to zero, the volume flow rate will be calculated
from the actual mass flow process variable.
However, the density cutoff is applied to the volume flow calculation. Accordingly, if the density
drops below its configured cutoff value, the volume flow rate will go to zero.
8.6.2 Interaction with the AO cutoffs
Both the primary mA output and the secondary mA output (if it is available on your transmitter) have
cutoffs (the AO cutoffs). If the mA outputs are configured for mass and volume flow:
• And the AO cutoffs are set to a greater value than the mass and volume cutoffs, the flow
indicators will go to zero when the AO cutoff is reached.
• And the AO cutoffs are set to a lower value than the mass or volume cutoff, the flow indicator
will go to zero when the mass or volume cutoff is reached.
See Section 6.5.3 for more information on the AO cutoff(s).
8.7 Configuring the damping values
A damping value is a period of time, in seconds, over which the process variable
value will change to reflect 63% of the change in the actual process. Damping helps
the transmitter smooth out small, rapid measurement fluctuations.
• A high damping value makes the output appear to be smoother because the
output must change slowly.
• A low damping value makes the output appear to be more erratic because the
output changes more quickly.
When you specify a new damping value, it is automatically rounded down to the nearest valid
damping value. Flow, density, and temperature have different valid damping values. Valid damping
values are listed in Table 8-5.
Table 8-4 Cutoff default values
Cutoff type Default Comments
Mass flow 0.0 g/s Recommended setting: 0.5–1.0% of the sensor’s rated maximum flowrate
Volume flow 0.0 L/s Lower limit: 0
Upper limit: the sensor’s flow calibration factor, in units of L/s, multiplied by 0.2
Density 0.2 g/cm
3
Range: 0.0–0.5 g/cm
3
• Model 1500 AN
• Model 1700 AN
• Model 1700 IS
• Model 2500 CIO
• Model 2700 AN
• Model 2700 IS
• Model 2700 CIO
• Model 1500 AN
• Model 1700 AN
• Model 1700 IS
• Model 2500 CIO
• Model 2700 AN
• Model 2700 IS
• Model 2700 CIO
- Micro Motion 1
- Series 1000 and 1
- Series 2000 Transmitters 1
- Contents 5
- Chapter 1 11
- Before You Begin 11
- Before You Begin continued 13
- Topic Document 13
- Term Definition 13
- Item Configuration data 15
- Chapter 2 17
- Using the Transmitter Display 17
- –8.100E 5 19
- Chapter 3 21
- Poll button in the Connect 26
- 1 and 2, or to the 26
- Connect to Device 32
- Chapter 4 33
- 375 Field Communicator 33
- Chapter 5 39
- Flowmeter Startup 39
- Flowmeter Startup continued 40
- 5.5.3 Zeroing with ProLink II 50
- Chapter 6 53
- Sensor type 54
- T- S er ie s O t he r 54
- Newer tag Older tag 55
- Flow FCF X.XXXX FT X.XX 56
- Terminals 58
- Default Process 58
- Mass flow unit 60
- Volume flow unit 61
- ProLink II code 69
- Communicator 69
- Polarity 75
- Output power 75
- Description 75
- Assignment ProLink II code 77
- Using the Transmitter 79
- Chapter 7 79
- • Model 1700 AN 84
- • Model 1700 IS 84
- • Model 2700 AN 84
- • Model 2700 IS 84
- • Model 2700 CIO 84
- Scroll optical switch 85
- Select optical switch 85
- Function name Communicator 86
- ProLink II 86
- ProLink 87
- Totalizer Control 87
- With a Communicator 88
- Chapter 8 89
- Optional Configuration 89
- Table 8-1 Configuration map 90
- Special 92
- • Model 2500 CIO 93
- Variable Description 94
- Cutoff type Default Comments 96
- Example 1 100
- Example 2 100
- Example 3 101
- Informational panel of the 102
- Status window 102
- Scroll to view process 104
- Max Int. Totalizers stop 106
- Parameter 109
- Series 1000 Series 2000 110
- Process variable 110
- PV SV TV QV PV SV TV QV 110
- Parameter Description 111
- Chapter 9 113
- Compensation, and Polling 113
- Pressure unit 114
- Static pressure 116
- Polled Var 1 119
- Chapter 10 121
- Troubleshooting 121
- Troubleshooting continued 122
- Section Topic 122
- Symptom Cause Possible remedy 132
- Pickoff value 141
- Cause Possible remedy 141
- Test terminal pair 146
- Colors Numbers 146
- Possible cause Solution 147
- Appendix A 151
- Default Values and Ranges 151
- Appendix B 155
- Appendix C 167
- Calibrating the Transmitter 167
- Appendix D 175
- Name Description 176
- Available process variables 178
- Slope and offset 181
- Appendix E 183
- Other configuration options 185
- Preferences menu 187
- Figure E-4 Communicator menus 188
- Appendix F 193
- Figure F-4 Communicator menus 197
- Appendix G 203
- Transmitters 203
- Figure G-4 Communicator menus 207
- Enter password if required 212
- Appendix H 219
- Figure H-4 Communicator menus 223
- Appendix I 235
- Configuration 237
- Figure I-4 Communicator menus 239
- On-Line Menu 240
- 3 Basic Setup 240
- 4 Detailed Setup 240
- 5 Review 243
- Appendix J 251
- Select to disable 252
- Select to enable 252
- Index continued 256
- *20001715* 264
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