ABB K-MAG 10D1476 Instruction Manual page 47

10D1476 K-MAG MAGNETIC FLOWMETER INSTRUCTION MANUAL
6.2 System Troubleshooting
If the Magnetic Flowmeter does not appear to be operating properly, the following procedure can be
used as a guide to isolate the malfunctioning device to either the primary meter or the Signal
Converter. A standard multimeter and an oscilloscope are suitable for making the test measure-
ments.
To supplement the following discussion refer to:
Section 5.0 Circuit Description
Primary Signals
Primary CMF Board
Figure 5-1 Primary Wiring
Figure 5-2 686B623U01 CMF/Zero Pcb Assembly
Figure 5-3 Schematic Diagram for Primary CMF Board
Signal Converter Assembly ... refer to applicable Instruction Manual
Equipment powered by an ac line voltage presents a potential electric
shock hazard. Servicing of the Magnetic Flowmeter or Signal Converter
should only be attempted by a qualified electronics technician.
If improper meter operation is suspected, proceed as outlined below.
1. Remove access covers from customer junction box and electronics compartment of primary.
Remove access cover from remote Signal Converter housing, if applicable. Inspect for evidence of
condensate in junction box. If condensate is present, de-energize system power source. Conduit
seals must be used at cable entrances to prevent entry of condensate. Allow interior of junction box
to dry completely before restoring system power.
2. The Signal Converter options available for use with the Magnetic Flowmeter include:
• remote mounted Analog Signal Converter
• remote mounted Microprocessor-Based Converter
Because signal wiring and operating procedures are dependent upon the type of Converter and the
mounting option selected, the user should refer to the instruction bulletin supplied with the associated
Signal Converter for system troubleshooting procedures. A static performance test for the primary
mounted components is discussed in Section 6.3, following.
6-2
WARNING