Goulds Pumpulator by Texas Instruments

Date of introduction:  1980  Display technology:  LED-stick
New price:    Display size:  8 (5 + 2)
Size:  5.8" x 3.1" x 1.4"
 148 x 78 x 36 mm3
Weight:  4.0 ounces, 114 grams Serial No:  2378392
Batteries:  9V Date of manufacture:  wk 51 year 1980  
AC-Adapter:   Origin of manufacture:  USA
Precision:  11 Integrated circuits:  TMC0980 (CD9801)
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner
    Download manual:   (US: 5.0M Bytes)

The Goulds Pumpulator was one of the early customized calculators produced by Texas Instruments. Basically this calculator represents a Business Analyst-I but was changed with a custom designed program memory to do be used as a pump calculator for use with the English system of measurement. A similar approach was later realized by Jeppesen Sanderson with their Flight Computers, e.g. the Avstar.

 Dennis Belillo gave us some hints about the functions and keys of this mystery calculator.

• psi = pounds/inch squared 1 psi = 70.3089 grams/cm. squared
• atmospheric pressure is +/- 15 psi at sea level
• hp (I understand that there is a measure of work called the metric horse power)
• 1 horse power (as God intended them to be) = 1.0143 horse power metric
• and 1 hp = 632,800 calorie, grams/hour
• gpm = gallons / min therefore 1 gpm = 3.7853 liters per minute

Simply by comparing the designation of the integrated circuits of the entry line "Majestic" calculators, you'll get the all members of this family:

• TMC0980    Goulds Pumpulator uses a custom design ROM (CD9801)
• TMC0981    TI-30 and SR-40
• TMC0982    Business Analyst and TI-41
• TMC0983    Programmer
• TMC0984    TI-33

Digging deeper into the TMC098x calculator chips you'll locate an OEM-chip used on a TI-30 "clone" manufactured in Hong Kong:

• TMC0985    Amelia Scientific 2001


With the introduction of the TI-58 Texas Instruments created the Solid State Software Modules™ to customize calculators. Have a look onto the insurance fee calculators from Agrippina, Allianz, Lloyd, LVM, Nordstern or Victoria.

horizontal rule

If you have additions to the above article please email:

© Joerg Woerner, December 5, 2001. No reprints without written permission.