Reference, Installation, and Operations Manual

Troubleshooting comm., mech., and elec.

3-9000-743 Rev S

June 2013

 

 

 

D.2 MARK III mechanical/electrical troubleshooting

This section is meant to assist site maintenance and operations personnel trained in the operation of the ultrasonic flow meter and knowledgeable in basic mechanical and electronic/ electrical troubleshooting techniques, using lap top computers as well as digital volt/ohm meters. Great care should be taken not to “short out” a given electronic/electrical circuit when Troubleshooting.

Table D-1 Mark III Mechanical/Electrical Troubleshooting

Problem

Solution(s)

 

 

no power to the unit

• Check for correct voltage (AC or DC) to the input of the Field Connection Board.

 

(see Appendix I, System Wiring Diagram).

 

• Check the main power source for blown fuse or tripped circuit breaker. Reference

 

your “as built” installation drawings for your location.

 

• Check the fuses on the Field Connection Board. Reference fuse F1 and F2 locations.

 

 

cannot communicate with Daniel

• Ensure that the meter is properly powered.

MeterLink program

• Ensure that the computer cable is properly connected to the field connection board

(see Appendix I) for the connector and check your interface pins (RS-485 or RS-

 

 

232).

 

• Verify that the communication parameters of the Daniel MeterLink program are set

 

according to jumpers on the meter CPU board. See Section 5.3 of this manual for

 

instructions on configuring communications.

 

• Check switch S-1 on the field connection board and ensure that it is in the correct

 

position

 

(RS-485 or RS-232 communication). Note that S1 is located at the top left side of

 

the board.

 

 

one or more of the chords is not

• Check for loose connections at the cable connectors. (see Appendix I).

indicating a reading (reporting

• Check the resistance of the transducers (should be approximately 1-2 Ω).

zeros)

• Problem also may be caused by a bad Acquisition board or interconnect cable. See

 

 

Appendix I drawing for more information

 

• Check system status in the Daniel MeterLink program for any flagged errors. See

 

Section 6.1.5 for system status information.

 

• Check the CPU board.

 

 

wave form contains an excessive

Increase the StackSize till noise level decreases (settings can be 1 (none), 2, 4, 8, or

amount of noise

16). See Section C.4.5 for instructions on changing register values. If increasing the

 

StackSize is not successful, try turning on the filter or consult with Daniel Customer

 

Service if you are unsure of how stacking a signal can effect the meter's operation. Refer

 

to Technical Support under the Help menu of Daniel MeterLink for contact information.

 

 

connected communication line to

• Check for loose connections at the flow meter and the flow computer (see

the flow computer but no signal is

Appendix I).

received

• Check the switch settings on the CPU board, Field Connection board and the Option

 

board. Make sure the switches are in the correct position (see Table 3-27through

 

Table 3-38for RS-485 or RS-232 communication).

 

 

MARK III mechanical/electrical troubleshooting

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