Cannon Instrument CT-2000 (Contant Temperature Bath) - Manual (Page 32)

CANNON ® CT-2000 Constant Temperature Bath
Revision 1.0g—February, 2012; CANNON ® Instrument Company
2139 High Tech Road • State College, PA 16803 • USA
30
Problem Possible cause/solution
Bath does not heat. • Sensors not operational. Check connections for
sensors on rear panel.
• Temperature set lower than current bath
temperature. Check temperature setting — it
must be above existing bath temperature for
heat to go on.
• Bath fluid level may be too low. Add fluid per
manual instructions.
Bath control outside of specific limits. • 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).
• Stirring motor or impeller may not be operating
properly. Check stirring motor and impeller.
• Faulty RTD probe. Remove control RTD probe
plug and check resistance with an ohmmeter
(approx. 100W at room temperature).
Bath top surface temperature too high. • Defective fan. Check cooling fan on rear panel
and in top assembly.
Air bubbles in bath fluid. • Level of fluid may be too low. Add fluid per
manual instructions.
• Stirring impeller may be on shaft with the wrong
orientation. See APPENDIX B.
• Bath fluid may be too viscous for operation at
this temperature. Replace with appropriate fluid.