Siemens MAG 5000 User Manual

85
SITRANS F M
9. Service
9.3
Check list MAG sensor
Disconnect all leads to MAG 1100/3100 or MAG 5100 W
MAG 1100/3100 or MAG 5100 W installed and filled with the medium:
Check coil resistance with a multimeter
R 85-86 Nominal value: See table
Check coil insulation with a megger (500 V)
R 85 - Gnd Nominal value: Infinite resistance
Check electrode circuit with a moving-coil instru-
ment without amplifier (measurement unstable)
R 82 - Gnd Nominal value: 5-500 kohm
R 83 - Gnd Nominal value: 5-500 kohm
Sensor apparently OK.
Remove sensor, dry it and check
Sensor may be defective.
Contact Siemens Flow
Instruments
Dirty electrodes or
conductivity too low
NO
NO
> 500 kohm
< 500 kohm
YES
YES
MAG 1100/3100/3100 W or MAG 5100 W removed from system – empty and dry:
Check coil resistance with a multimeter
R 85-86 Nominal value: See table
Check coil insulation with a megger (500 V)
R 85 - Gnd Nominal value: Infinite resistance
Check electrode insulation with megger (500 V)
R 82 - Gnd Nominal value: Infinite resistance
R 83 - Gnd Nominal value: Infinite resistance
NO
NO
YES
YES
MAG 1100/3100 or MAG 5100 W OK
YES
Check continuity between electrode and electrode
terminal
R 82 - Electrode Nominal value: 0 kohm
R 83 - Electrode Nominal value: 0 kohm
YES
Sensor may be defective.
Contact Siemens Flow
Instruments
NO
NO

Siemens MAG 5000 Specifications

General

Type	Electromagnetic Flowmeter
Protection Class	IP67
Material	Stainless Steel, Carbon Steel
Power Supply	24 V DC, 100-240 V AC
Accuracy	±0.2% of flow rate
Communication	HART, PROFIBUS, Modbus
Enclosure Rating	IP67
Ambient Temperature Range	-20°C to +60°C
Sizes	DN 2 to DN 3000
Lining Materials	PTFE, Hard Rubber
Electrode Materials	Stainless Steel, Hastelloy, Tantalum
Process Temperature	-40 to +180 °C (-40 to +356 °F) depending on liner
Process Pressure	Up to 40 bar (580 psi)
Approvals	ATEX, FM, CSA, IECEx
Flow Velocity Range	0 to 12 m/s
Output Signals	4-20 mA, Pulse, Frequency