DATAMATH CALCULATOR MUSEUM |
Texas Instruments TI-EC7 Pro
Date of introduction: | July 2007 | Display technology: | LCD |
New price: | €17.59 | Display size: | 12 characters and 12 |
Size: | 6.5" x 4.5" x 1.1" | ||
Weight: | 5.4 ounces | Serial No: | |
Batteries: | CR2032 | Date of manufacture: | mth 02 year 2007 |
AC-Adapter: | Origin of manufacture: | China (N) | |
Precision: | 12 | Integrated circuits: | |
Memories: | 1 | ||
Program steps: | Courtesy of: | Joerg Woerner |
The TI-EC7 Pro+ replaced in 2007 the TI-EC7 Pro introduced only one year earlier.
At first glance the only changes are a new up-to-date design but Texas Instruments addressed the owners of the original TI-EC7 Pro with an important product update:
EC7 Pro Product Update We have recently become aware of a computational issue with the EC-7 calculator. This does not affect the EC-3 or EC-5 models, or any of TI’s other calculators. When inputting figures less than 1.0 on the EC-7, you must input a zero before the decimal. Otherwise the answer will be incorrect. For example, in the EC-7 100 – .5-.5 = 100; 100- 0.5-0.5 = 99. For more information, please contact our customer service center at: Texas Instruments Education Technology, 800 Pavilion Drive, Northampton, NN4 7YL Telephone: 020 8230 3184 (© 2007: http://education.ti.com/educationportal/sites/UK/nonProductSingle/ec7pro_update.html) |
Dismantling
the TI-EC7 Pro+ reveals a
printed circuit board (PCB) 100% identical with the TI-EC7 Pro and we assume
that the fault was corrected by a software update of the single-chip calculator
circuit hidden under the small black epoxy-resin blob.
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, August 12, 2007. No reprints without written permission.