User's Manual Part 3

ECD, Inc.
4287-B S.E. International Way
Milwaukie, Oregon 97222-8825
Telephone: (800) 323-4548
FAX: (503) 659-4422
Technical Support: (800) 323-4548
Email: ecd@ecd.com
Internet: http://www.ecd.com
7.3.3. Calibration Information
Because the M.O.L.E.® Thermal Profiler is made with precision components with high
temperature stability and tight tolerances, the analog-to-digital converter remains stable
for years. High quality components together with software algorithms based on the
IPTS-90* standard for Type K thermocouples have been provided to yield the specified
accuracy and long-term stability. Each unit has been tested at the factory before it is
shipped.
ECD recommends the M.O.L.E.® Thermal Profiler is factory re-calibrated
every 6 months when it is being used constantly. If the use is occasional, a
period of no greater than 12 months between calibrations is recommended.
Good thermal quality programs require periodic calibration to show the Thermal Profiler
continues to remain in calibration using a temperature standard. Any observed
inaccuracies are probably not caused by calibration error but by any one of a number of
other sources, primarily the following:
1. Poor thermocouple connections or open thermocouples.
2. Using a standard that is inaccurate or one not traceable to the National Institute of
Standards and Technology.
Check the accuracy of your standard and that it is traceable to NIST. Be sure
that you're using Type K special limits of error wire connected to the standard.
Be sure that your standard is cold-junction compensated, or use an ice-point
reference.
Make sure that IPTS-90 tables are being used.
3. Extremely low Power Pack charge.
Recharge the Power Pack. Refer to M.O.L.E.® MAP User Help System for
details.
4. Sudden changes in ambient temperature.