Test A. Terminal to front electrode
Table 12-13:
Test conditions
Expected
value
Potential cause
Corrective action
•
Location: uninstalled
•
Required equipment: Multi-
meter
•
≤
1
Ω
•
Shorted electrode
•
Open electrode
•
Coated electrode
•
Replace sensor
•
Remove coating from sensor
wall
(1) When the connection head is in the vertical upright position and the flow arrow (see
) on the connection head flange
points to the right, the front of the meter will be facing towards you. Electrode 18 is on the front of the meter. If you cannot determine
the front of the meter, measure both electrodes. One electrode should result in an open reading, while the other electrode should be
less than 0.3 ohm.
Test B. Terminal to back electrode
Table 12-14:
Test conditions
Expected
value
Potential cause
Corrective action
•
Location: uninstalled
•
Required equipment: Multi-
meter
•
≤
1
Ω
•
Shorted electrode
•
Open electrode
•
Coated electrode
•
Replace sensor
•
Remove coating from sensor
wall
(1) When the connection head is in the vertical upright position and the flow arrow (see
) on the connection head flange
points to the right, the front of the meter will be facing towards you. Electrode 18 is on the front of the meter. If you cannot determine
the front of the meter, measure both electrodes. One electrode should result in an open reading, while the other electrode should be
less than 0.3 ohm.
Test C. Terminal to reference electrode
Table 12-15:
Test conditions
Expected
value
Potential cause
Corrective action
•
Location: uninstalled
•
Required equipment: Multi-
meter
•
17 and process reference
electrode
≤
0.3
Ω
•
Shorted electrode
•
Open electrode
•
Coated electrode
•
Replace sensor
•
Remove coating from sensor
wall
(1) Only valid if the sensor has a process reference electrode.
Test D. Terminal to case ground
Table 12-16:
Test conditions
Expected
value
Potential cause
Corrective action
•
Location: uninstalled
•
Required equipment: Multi-
meter
•
17 and safety ground
≤
0.3
Ω
•
Moisture in terminal block
•
Leaky electrode
•
Process behind liner
•
Clean terminal block
•
Replace terminal block
•
Replace sensor
Troubleshooting
176
Rosemount
®
8732EM Transmitter with HART Protocol Reference Manual
Summary of Contents for Rosemount 8732EM
Page 2: ......
Page 6: ...Contents iv Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Page 10: ...Safety messages 4 Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Page 14: ...Introduction 8 Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Page 30: ...Sensor Installation 24 Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Page 92: ...Operation 86 Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Page 158: ...Maintenance 152 Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Page 214: ...Product Certifications 208 Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Page 217: ...Wiring 8732EM using combination cable Figure C 2 Wiring Diagrams Reference manual 211 ...
Page 222: ...Wiring Diagrams 216 Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Page 253: ...Implementing a Universal Transmitter Reference manual 247 ...