User's Manual Part 3

MEGAM.O.L.E.® Help System Guide ♦356♦
6.2.2. Calibration Information
Because the MEGAM.O.L.E. profiler and I/O Module are 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 ITS-90* standard for Type K thermocouples have been
provided to yield specified accuracy and long-term stability. Each unit has been tested
at the factory before it is shipped.
ECD recommends the MEGAM.O.L.E. profiler I/O Module 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.
Depending on use, however, temperature accuracy should be periodically verified using
a suitable 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 connectors or open thermocouples.
2) Using a temperature standard that is inaccurate or is not traceable to the
National Institute of Standards and Technology (NIST, formerly the Nation
Bureau of Standards).
• Check the accuracy of your temperature standard and that it is traceable to NIST.
Be sure that you’re using Type K wire connected to the standard. Be sure that
your temperature standard is cold-junction compensated, or use an ice point
reference.
3) Extremely low Power Pack battery charge.
• Recharge the Power Pack battery. Refer to topic Basics>Setup>Charging the
Power Pack Battery.
4) Sudden changes or excessive ambient temperatures.
• Allow MEGAM.O.L.E. profiler temperature to stabilize for 1/2 hour before
calibration.
If after checking these possible sources of inaccuracy the MEGAM.O.L.E. profiler I/O
Module still needs to be calibrated, contact ECD for the proper calibration procedure
P/N A47-6342-05.
If you need to return the MEGAM.O.L.E. profiler I/O Module for re-calibration, contact
ECD and request an RMA (Return Merchandise Authorization). Refer to section How to
Get Additional Help for contact information.
*ITS-90 (International Temperature Scale of 1990)