Static Test; Magnet Coil Check; Remote Model 10Dx3111E; Integral Model 10Dx3311E - ABB COPA-XM 3000 Series Instruction Manual

Series 10DX3000 Magnetic Flowmeter Instruction Manual
2. Since signal wiring and operating procedures are dependent upon the type of Converter and the
mounting option selected, the user should refer to the instruction manual supplied with the associ-
ated Signal Converter for system troubleshooting procedures. A static performance test for the
primary mounted components is discussed in Section 5.3.
The Signal Converter options available for use with the Series 3000 Magnetic Flowmeter are eitheran
integrally or remotely mounted 50XM1000N Microprocessor-based Signal Converter
3. Possible causes of erroneous flow rate indication are:
• incorrect grounding
• excessive noise due to a heavy slurry process
or a non-homogeneous process
• loose or intermittent wiring
• non-full or empty meter pipe
• excess air entrained in process liquid
• fluid conductivity below specified minimum

5.3 Static Test

If improper operation of the Magnetic Flowmeter is suspected, the following resistance measure-
ments can be made to establish whether an electrical malfunction has occurred. An analog multime-
ter is required for checking the electrodes. Either an analog or digital multimeter can be used for
checking the coils. These measurements can be made at the flowmeter PC board.
ELECTRICAL SHOCK HAZARD. Equipment powered by an ac line voltage
presents a potential electric shock hazard. Make certain that the system
power is disconnected before making the following ohmmeter checks.

5.3.1 Magnet Coil Check

5.3.1.1 Remote Model 10DX3111E

Verify that the system power service has been de-energized. Measure the resistance between
terminal M1 on the Primary connection board and the flowmeter body. The value displayed should be
between 15Ω and 80Ω. A reading significantly outside this range or a short circuit between leads
indicates defective coil(s).
Measure the resistance between terminal 16 of the Primary connection board and the flowmeter
body. This resistance should measure between 10Ω and 500Ω.

5.3.1.2 Integral Model 10DX3311E

There are two magnet coils in the meter that are wired in series and brought up to terminals M1 & CT
and MR & CT1 of the flowmeter PC board in the electronics base.
WARNING
5-3