Cannon Instrument CT-1000HT (High Temperature Contant Temperature Bath) - Manual (Page 21)

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CANNON ® CT-1000HT Constant Temperature Bath
Revision 1.1a—June, 2007; CANNON ® Instrument Company
2139 High Tech Road • State College, PA 16803 • USA
CHAPTER
A
APPENDIX A — CT-1000HT
PROBLEM ANALYSIS
Probable Cause/Solution
• Power cable not connected to outlet or rear of electrical drawer.
Reconnect cable.
• Over-temperature control set too low. Reset per manual instructions.
• Power out on mains. Restore mains power.
• Separate switch for LIGHT must be on.
• fluorescent lamps may be defective. Replace.
• Lamps may be out of sockets. Tighten lamps.
• Lamp ballast may be defective.
• Power supply to ballast may not be working properly. Replace faulty
compontents.
• 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. Adjust if necessary.
• Bath fluid level may be too low. Add fluid per manual instructions.
• Limit Control Temperature Adjust dial may be set too low. Turn the
dial completely clockwise to 999, then press PUSH TO RESET
button. If bath starts, reset the dial per manual instructions.
• 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). Select a more appropriate bath fluid.
• Check for normal function of stirring motor and motor impeller. Adjust
and/or replace components if necessary.
• 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. Add fluid per manual instructions.
• Stirring impeller may be on shaft with the wrong orientation. Adjust.
• Bath fluid may be too viscous for operation at this temperature.
Select a more appropriate bath fluid.
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.