Cannon Instrument CMRV-4500 - Manual (Page 113)

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CANNON ® Mini-Rotary Viscometer CMRV-4500 Instruction & Operation Manual
Version 1.1e—October, 2011 • CANNON ® Instrument Company
2139 High Tech Road • State College, PA • 16803 • USA
CHAPTER
A
APPENDIX A —
TROUBLESHOOTING
Instrument status window not updating
Check serial cable connections.
If the status field in the Instrument View window indicates the CMRV is
idle, then give the command to initiate the desired operation.
If the temperature control lights on the controller are lit or blinking,
close the Instrument Status window and reopen it.
If temperature control lights on the controller are not lit or blinking,
you may have a controller problem. Restart the instrument and try
again.
The CMRV-4 is not heating properly
Check to make sure the thermistor is seated securely in the CMRV-4
block.
Make sure CMRV
PUMP and HEATER connections are correct and
secure.
The Yield and Viscosity lights on the CMRV front panel are blinking rapidly.
Power down the controller for at least four seconds and then switch
the controller back on. If the lights continue to flash, there is an
internal problem with the controller.
CMRV cooling/temperature control problems
Check to make sure the thermistor is seated securely in the CMRV-4
block.
Make sure CMRV
PUMP and HEATER connections are correct and
secure.
Check the Air/Water Heat Exchanger power connections
Make sure the Air/Water Heat Exchanger power is on.
Make sure the
DC Power lamp on the exchanger is lit. If it is not,
check to see if the Coolant Flow LED on the exchanger is lit in
synchronization with the Cooling LED on the CMRV controller.
If the Coolant Flow LED on the exchanger is lit in synchronization
with the Cooling LED on the CMRV controller, check the tubing
connections between the exchanger and the CMRV chassis and make
certain that the DC power cable is correctly connected to the CMRV
chassis (see Chapter 4). If cable connections are OK, there may be a
problem with the relay in the Air/Water Heat Exchanger.
If the Coolant Flow LED on the exchanger is NOT lit in synchroniza-
tion with the Cooling LED on the CMRV controller, check the tubing
connections between the Air/Water Heat Exchanger and the CMRV.