5-7
Troubleshooting
FIGURE 5-1.
Flowtube Circuit Diagram
Process Noise
In some circumstances, process conditions such as slurries or fluids
with high solid contents can cause the meter output to be unstable. The
basic procedure for addressing a noisy process situation is outlined
below. Complete them in order. When the output attains the desired
stability, no further steps are required.
Noisy Conditions Basic Procedure
1. Change coil drive to 30 Hz and perform the Auto Zero function
(see page 4-5) on the transmitter.
2. Increase the analog damping to 5 seconds.
3. Activate digital signal processing.
4. Consult Rosemount Sales Representative about using a High-
Signal Magnetic Flowmeter System.
REPLACEMENT
PROCEDURES
This section includes instructions for replacing the electronics board. If
the electronics board in the transmitter ever fails, modular construction
makes it easy to remove and replace.
Replacing the
Electronics Module
Removing the Electronics Removal of the electronics board consists of loosening several screws
and disconnecting several connectors. Refer to Figure 5-2 and
Figure 5-3 for location of these screws and connectors.
1. Remove power from the transmitter by removing fuse or by
another technique.
2. Loosen and remove the four captive screws on the sides of the
board as shown in Figure 5-2.
3. Pull the board out of the housing about two inches to access the
connectors on the component side of the circuit board.
4. Disconnect the cables at the Power Connector and both Terminal
Block Connectors. See Figure 5-2 for the exact locations.
8712-0007E04A
68.1kV (not applicable for flowtubes
with N0 hazardous certification
approval option code)
Flowtube Housing
68.1kV
To Next Page
Loading...
