General specifications
(continued)
Table 2-1:
RFI/EMI
EN-61326
Diagnostics (may slightly vary based
on measurement type)
•
Calibration error
•
Low temperature error
•
High temperature error
•
Sensor failure
•
Line failure
•
CPU failure
•
Calibration error
•
Zero error
•
Temperature slope error
•
Sensor failure
•
ROM failure
•
Input warning
Once one of the above warnings/faults are diagnosed, the LOI will display a
message describing the failure detected.
Digital communications
HART
Table 2-2:
Power and load requirements
Supply voltage at the transmitter terminals should be at least 12 Vdc. Power supply
voltage should cover the voltage drop on the cable plus the external load resistor re-
quired for HART communications (250 Ohms minimum). Minimum power voltage is
12 Vdc. Maximum power voltage is 42.4 Vdc (30 Vdc for intrinsically safe operation).
The graph shows the supply voltage required to maintain 12 Vdc (upper line) and 30
Vdc (lower line) at the transmitter terminals when the current is 22 mA.
Analog output
Two-wire, 4-20 mA output with superimposed HART digital signal, scalable over the op-
erating range of the sensor.
Output accuracy
±0.05 mA
Variables assignable to
pH, Temperature, mV, Glass impedance, Reference impedance, RTD resistance, ORP,
Conductivity, Resistivity, Concentration, Raw conductivity, Chlorine, Dissolved oxygen,
and Ozone
Description and specifications
4
Rosemount 5081
Summary of Contents for Rosemount5081
Page 4: ......
Page 10: ...Contents vi Rosemount 5081 ...
Page 12: ...Startup procedure 2 Rosemount 5081 ...
Page 23: ...Mounting 5081 on a pipe Figure 3 2 Installation Instruction Manual 13 ...
Page 24: ...Installation 14 Rosemount 5081 ...
Page 28: ...Wiring 18 Rosemount 5081 ...
Page 50: ...Programming basics 40 Rosemount 5081 ...
Page 130: ...Diagnostics and troubleshooting 120 Rosemount 5081 ...
Page 136: ...Digital communications 126 Rosemount 5081 ...
Page 140: ...Engineering drawings 130 Rosemount 5081 ...
Page 141: ...Engineering drawings Instruction Manual 131 ...
Page 142: ...Engineering drawings 132 Rosemount 5081 ...
Page 143: ...Engineering drawings Instruction Manual 133 ...
Page 144: ...Engineering drawings 134 Rosemount 5081 ...
Page 145: ...Engineering drawings Instruction Manual 135 ...
Page 146: ...Engineering drawings 136 Rosemount 5081 ...
Page 151: ...EU Declarations of Conformity 138 Rosemount 5081 ...