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: 5.0 MByte)

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 me some hints about the functions and keys of this mystery calculator. If you know more about the calculator or own a manual, please contact me.

• 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.

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If you have additions to the above article please email:

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