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Troubleshooting
Troubleshooting Problems, Possible Causes, and Solutions
Troubleshooting11
This section contains information on troubleshooting, CE Comments, and a wiring
diagram.
Troubleshooting Problems, Possible Causes, and Solutions11.1
In the event that the instrument appears to function abnormally, this section may help
to nd 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 problem cannot otherwise be
solved, contact an Authorized Service Center (see Section 1.4, Authorized Service
Centers, on page 6) for assistance. Be sure to have the model number, serial number,
voltage, and problem description available.
Problem Possible Causes and Solutions
Incorrect
temperature reading
Incorrect R0, ALPHA, and DELTA parameters. Find the value for R0, ALPHA,
and DELTA on the Report of Calibration. Reprogram the parameters into the
instrument (see Section , Calibration Parameters). Allow the instrument to
stabilize and verify the accuracy of the temperature reading.
Controller locked up. The controller may have locked up due to a power surge or
other aberration. Initialize the system by performing the Factory Reset Sequence.
Factory Reset Sequence. Hold the SET and EXIT buttons down at the same time
while powering up the instrument. The instrument displays shows ‘-init-‘, the
model number, and the rmware version. Each of the controller parameters and
calibration constants must be reprogrammed. The values can be found on the
Report of Calibration (see Section 6.12, Calibration Parameters, on page 27).
The instrument
heats or cools too
quickly or too slowly
Incorrect scan and scan rate settings. The scan and scan rate settings may be set
to unwanted values. Check the Scan and Scan Rate settings. The scan may be
off (if the unit seems to be responding too quickly). The scan may be on with the
Scan Rate set low (if unit seems to be responding too slowly).
Improper line voltage. Verify that the voltage reading in the bottom of the unit
matches the source voltage.
Unstable display Wait. Allow the instrument to stabilize for a few minutes.
Proportional band may be incorrect. Refer to the proportional band on the Report
of Calibration.
The display shows
an error code
Controller problem. The error messages signify the following problems with the
controller.
Err 1 - a RAM error
Err 2 - a NVRAM error
Err 3 - a Structure error
Err 4 - an ADC setup error
Err 5 - an ADC ready error
Err 6 – a defective control sensor
Err 7 – a heater error
Initialize the system by performing the Factory Reset Sequence describe above.
Temperature cannot
be set above a
certain point
Incorrect High Limit parameter. The High Limit parameter may be set below 125°C.
Check this value as described in Section 6.9, Operating Parameters, on page 25.
Display is reading
incorrectly
The instrument was turned off at high temperatures and reenergized too quickly.
Turn the instrument off until the display is completely off and then reenergize.
Display ickers
when the
instrument is turned
off
This is normal operation and is more prevalent at high temperatures due to
Seebeck Coefficient of the thermoelectric cooling devices. Some time is required
to fully discharge the switching power supply and to complete the power off cycle.
1.888.610.7664 sales@GlobalTestSupply.com
Fluke-Direct.com
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