Cannon Instrument CT-1000 (Contant Temperature Bath) - Manual (Page 19)

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CANNON ® CT-1000 Constant Temperature Bath Instruction & Operation Manual
Revision 3.1e—June, 2011; CANNON ® Instrument Company
2139 High Tech Road • State College, PA • USA 16803
A
APPENDIX A — CT-1000
PROBLEM ANALYSIS
Problem
Bath does not appear to
have power.
Bath illumination not
functioning.
Bath liquid not agitated.
Bath does not heat.
Bath control outside of
specific limits.
Bath top surface
temperature too high.
Air bubbles in bath fluid.
Probable Cause
• Power cable not connected to outlet or rear of electrical drawer.
• Over-temperature control set too low.
• Power out on mains.
• Separate switch for LIGHT must be on.
• fluorescent lamps may be defective.
• Lamps may be out of sockets.
• Lamp ballast may be defective.
• Power supply to ballast may not be working properly.
• Check connection of stirring motor on rear panel.
• Check for working motor by connecting to outlet with the proper
voltage (see motor label for correct voltage).
• Check connections for sensors on rear panel.
• Check temperature setting — it must be above existing bath
temperature for heat to go on.
• Bath fluid level may be too low.
• Limit Control Temperature Adjust dial may be set too low (turn
completely clockwise to 999, then press PUSH TO RESET
button).
• Bath fluid viscosity may be too high (if the fluid is too viscous at the
desired temperature the stirring will be inadequate, resulting in
poor control).
• Check for normal function of stirring motor and motor impeller.
• Remove control thermistor probe plug and check resistance with an
ohmmeter (call CANNON ® for proper resistance at bath
temperature).
• Check cooling fan on rear panel.
• Check cooling fan in top assembly.
• Level of fluid may be too low.
• Stirring impeller may be on shaft with the wrong orientation.
• Bath fluid may be too viscous for operation at this temperature.