METER AQUALAB TDL Manual

50
SERVICE
Table 6 Troubleshooting the AQUALAB TDL (continued)
Problem Possible Solutions
Readings are slow or
inconsistent
The sample chamber may be dirty. Refer to Section4.2 for
directions on cleaning the sample chamber.
The temperature difference between the sample and the block
chamber may be too great. Allow the sample to equilibrate to
instrument temperature. Refer to Section2.2.2.
Some products absorb or desorb moisture very slowly, causing
measurements to take longer than usual, and nothing can be done
to speed up the process. Refer to Section2.2.1.
Water activity readings on
verification standards are
too high or too low and a
linear offset adjustment
cannot be made any higher
or lower
The IR sensor, which measures sample temperature, may have
become contaminated. Refer to Section4.2 for directions on
cleaning.
The AQUALAB TDL lenses may be dirty. Refer to Section4.2 for
directions on cleaning.
Remove sample. Sample is
too hot! error message
The sample temperature is too high for the instrument to
equilibrate within a reasonable amount of time. Ensure samples are
at the same temperature as the instrument (Section2.2.2).
Crystal Failure. See
Manual for options.
error message
The crystal that runs the firmware is having trouble starting. Cycle
the power. If this message continues to appear, the instrument
needs to be serviced by METER (Section4.4).
Verification is not correct
Clean the sample chamber and components. Refer to Section4.2
for detailed cleaning instructions.
If verification is still not correct, verify and adjust for linear offset
(Section4.1.2).
Pressure sensor failure
The pressure sensor used during water activity measurements is
not functioning correctly and needs to be replaced. METER needs
to service the instrument (Section4.4).
Firmware is corrupted. See
Manual for options.
error message
The firmware on the instrument is corrupted and needs to be
reloaded. To download new firmware to the AQUALAB TDL models,
the instrument must be serviced by METER (Section4.4).
Moisture content displayed
is not correct
The model selected may not be correct for the product being tested.
Toggle through the available models to find a more appropriate
model.
If the model is correct but not giving correct moisture content
values, it may be necessary to offset the model. See Section2.6 for
detailed instructions.
If the model is correct and an offset does not work, it may be
necessary to generate a new model for the product or update an
existing model. For information about updating or generating a
model, contact Customer Support.

METER AQUALAB TDL Specifications

General

Brand	METER
Model	AQUALAB TDL
Category	Measuring Instruments
Language	English