Table of Contents
Advertisement
When checking the over-temperature cutout, be sure that the
temperature limits of the bath fluid are not exceeded. Exceeding
the temperature limits of the bath fluid could cause harm to the
operator, lab, and instrument.
•
The over-temperature cutout should be checked every 6 months to see that it
is working properly. In order to check the user selected cutout, follow the
controller directions for setting the cutout. Both the manual and the auto reset
option of the cutout should be checked. Set the bath temperature higher than
the cutout. Check to see if the display flashes cutout and the temperature is
decreasing.
Troubleshooting
In the event the bath appears to function abnormally this section may help to find
and solve the problem. Several possible problem conditions are described along
with likely causes and solutions. If a problem arises please read this section
carefully and attempt to understand and solve the problem. If the bath seems
faulty or the problem cannot otherwise be solved, then contact an Authorized
Service Center for assistance. Opening the unit without contacting an Authorized
Service Center may void the warranty.
Troubleshooting Table
Problem
The heater indicator LED stays red but the
temperature does not increase
The controller display flashes
the heater does not operate
WWarning
If the display does not show "cutout" and shows the
correct bath temperature, consider the following
possibilities:
Insufficient heating. Insufficient heating may be
caused by the heater power setting being too low,
especially at higher operating temperatures. Switching
to the higher heater power switch setting, if available,
may solve the problem.
No heating. This is caused by blown heater fuses
and/or burned out heaters. Check the heater fuses to
make sure that they are still good. Access the heater
fuses by removing the L-shaped panel covering the
display electronics. If they are blown, and continue to
blow when replaced, the heaters may be shorted. If
you suspect that the heaters are shorted or burned
out, contact an Authorized Service Center for
assistance.
If the display flashes "CUToUT" alternately with the
correct process temperature, check the following:
Wrong cutout setting. The cutout disconnects power
to the heaters when the bath temperature exceeds the
and
"CUToUT"
cutout set-point. This causes the bath temperature to
drop back down to a safe value. If the cutout mode is
set to "AUTO", the heater switches back on when the
temperature drops. If the mode is set to "RESET", the
heater only comes on again when the temperature is
reduced and the operator manually resets the cutout.
Check that the cutout set-point is adjusted to 10 or
Causes and Solutions
Calibration Bath
Troubleshooting
55
Advertisement
Table of Contents
