Troubleshooting - Fluke 7012 User Manual

13

Troubleshooting

This section contains information on troubleshooting and CE Comments. This
information pertains to a number of bath models and certain specifics may not
pertain to your model.
13.1 Troubleshooting
In the event that the instrument 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 probe seems faulty or the problem cannot otherwise be solved, contact an
Authorized Service Center (see Section 1.3, on page 5) for assistance. Be sure
to have the instrument model number, serial number, voltage, and problem de-
scription available.
Problem
The heater indicator LED stays
red but the temperature does not
increase
The controller display flashes
"Cut-out" and the heater does
not operate
Causes and Solutions
The display does not show "Cut-out" nor displays an incorrect bath
temperature, and the controller otherwise appears to operate normally.
The problem may be insufficient heating, no heating at all, or too
much cooling.
•
The heater power setting being too low, especially at
higher operating
•
One or more burned out heaters or blown heater fuses
may also cause this problem. If the heaters seem to be
burned out, contact an Authorized Service Center (see
Section 1.3, on page 5) for assistance.
The display flashs "Cut-out" alternately with the process
temperature.
•
If the process temperature displayed seems grossly in
error, consult the following problem: 'The display flashes
" Cut-out " and an incorrect process temperature'.
•
Normally, the cutout disconnects power to the heater
when the bath temperature exceeds the cutout set-point
causing the 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 cutout is man-
ually reset by the operator, see Section 9.8, Cutout.
Check that the cutout set-point is adjusted to 10 or 20°C
above the maximum bath operating temperature and
that the cutout mode is set as desired.
•
If the cutout activates when the bath temperature is well
below the cutout set-point or the cutout does not reset
when the bath temperature drops and it is manually re-
set, then the cutout circuitry or the cutout thermocouple
sensor may be faulty or disconnected. Contact an Autho-
rized Service Center (see Section 1.3, on page 5) for as-
sistance.
13 Troubleshooting
Troubleshooting
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