Texas Instruments TI-30 eco RS

Date of introduction:  1999 Display technology:  LCD
New price:   Display size:  10 + 2
Size:  5.9" x 3.0" x 0.50"    
Weight:  2.9 ounces Serial No:  
Batteries:  n.a. Date of manufacture:  mth 01 year 2001
AC-Adapter:   Origin of manufacture:  China
Precision:  12 Integrated circuits:  
Memories:  3    
Program steps:   Courtesy of:  Joerg Woerner

TI-30ecoRS_PCB.jpg (120013 Byte)This calculator is identical to the TI-30Xa Solar introduced in the year 1996. The main difference is the marketing concept. 

The housing is made of recycled plastic and together with the solar cells instead of batteries this allowed Texas Instruments Germany to use the "Umweltzeichen" sign.

Consumers in Germany call it the "Blue Angel". Its official name is "Umweltzeichen" (Environmental Label or the "Eco-Mark"). What they are referring to is a special logo, which has for two decades now been a symbol for products with positive environmental features on the German market. Well over 3,800 products now bear the mark. This success is proof of the increased environmental awareness both of producers and of consumers. Because the Environmental label is an entirely voluntary labeling of a product’s environmentally friendly features.

Don't miss the TI-36 eco RS calculator introduced in the same year.

Read more about the Logarithm Bug and its side effect on the related yx function present in this calculator.

Texas Instruments introduced in April 2004 a slightly redesigned TI-30 ECO RS for the German market.

Solar-Powered Products and Mechanical Watches/Clocks RAL-UZ 47

The Blue Angle
Powered by 
The Blue Angle
Without Battery

"The important thing about the Blue Angel is the bottom line result: a positive balance for the environment."

In the tension between ecology and economy, the line of argument which leads to a solution for all parties – business, consumers, commercial purchasers and not least the environment – is both simple and compelling; ecologically optimised products provide sustainable relief to the strain on the environment. Environmental awareness in the behaviour of consumers is the decisive factor in the provision of ecologically beneficial products and services by industry and retailers. However, in order to evaluate the environmental properties of products and services, consumers need reliable information and clear labelling. This is where the Blue Angel comes in: it guarantees an ecologically better alternative product according to defined criteria – and it enables consumers to demonstrate for their "right to the environment" in the things they buy.

The Blue Angel is not based on directives and prohibitions; it is based on information and motivation – and the conviction and commitment of producers and consumers alike.

So what are the results of the Blue Angel today? About 710 companies and 3,800 products use this environmental label. And about half of the consumers in West Germany and almost a third in East Germany take it into account when they go shopping. This makes the Blue Angel a signpost for the environmental awareness of consumers.

The Blue Angel rewards businesses which show commitment, creativity and innovation for the protection of the environment. It highlights products and services which are optimised in their impact on the environment. The Blue Angel offers companies added credibility to advertise their ecologically beneficial products in the market. And according to the users of the label, the Blue Angel has stimulated competition for ecological innovation and the ecological quality of the products and services offered. It is agreed that the classics of the Environmental Label – such as returnable bottles and recycled paper – have long become successfully established in the market. Any you will not find a DIY store which does not sell low-pollutant paints and varnishes bearing the Environmental Label. The Blue Angel was and still is the trendsetter for product-related environment protection.

These points alone are sufficient reason for me to appreciate the Blue Angel as a valuable and indispensable instrument in our environmental policies. It is a dynamic environmental label which takes an abstract principle and fills it with life and meaning.
I wish the Blue Angel every success as it continues along this path.

Jürgen Trittin
Federal Minister of the Environment, Nature Protection and Nuclear Safety

Casio and Texas Instruments

Searching the website results in a total of only 8 electronic pocket calculators awarded with the environmental label Solar-Powered Products and Mechanical Watches/Clocks RAL-UZ 47:

Casio Europe GmbH  SL-450L
Texas Instruments Deutschland GmbH TI-106
TI-30 eco RS
TI-30Xa Solar
TI-36 eco RS
Solar Little Professor

It is quite interesting that not only the two calculators TI-30 eco RS and TI-36 eco RS decorated with the Blue Angel comply with the requirements of RAL-UZ 47 but even the twin TI-30Xa Solar.

The above mentioned RAL-UZ 47 covers a lot of solar powered products, please find below a version stripped down to cover only pocket calculators. Reading these criteria carefully points it out that the Blue Angel is just a marketing concept, not a development target. There are only four relevant requirements:

Solar cells with an efficiency to supply the calculator at 50 lux
No battery, not even a holder for it
No parts with cadmium
No capacitors with PCB (
Polychlorinated Biphenyls)

These four requirements could easily compressed to only the first one because:

A pocket calculator with solar cells running at 50 lux ambient light doesn’t need batteries because you can‘ read the display in the dark.
   Disadvantage of such a calculator is its volatile memory.
Cadmium is widely used, 70 % of its use is in rechargeable nickel-cadmium batteries and 13% as pigments to produce intense colorings
   such as yellow, orange and red in plastics, glasses and ceramics. Usually calculators are grey to black, only the Little Professor looks different.
"Capacitors with PCB" are usually power-capacitors filled with PCB, they were discontinued already in 1976.


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Solar-Powered Products and Mechanical Watches/Clocks RAL-UZ 47


1 Preliminary Remarks


1.1 In cooperation with the Federal Minister for the Environment, Nature Conservation and Nuclear Safety, the Federal Environmental Agency and considering the results of the expert hearings conducted by RAL, the Environmental Label Jury has set up these Basic Criteria for the Award of the Environmental Label.
RAL, reg. assoc., has been entrusted with the award of the Environmental Label.
Upon application to RAL and on the basis of a Contract on the Use of the Environmental Label to be concluded with RAL the permission to use the Environmental Label may be granted for all products, provided that they comply with the requirements as specified hereinafter.

1.2 Mercury and its compounds are among the most dangerous environmental pollutants. About half the mercury in domestic wastes comes from batteries. Batteries and especially accumulators also contain cadmium, another non-degradable pollutant.
Alternative products driven by solar energy are useful substitutes for environmentally noxious batteries and thus help to reduce the heavy-metal impact on air, soil and water by mercury and cadmium.


2 Scope 

These Basic Criteria apply to solar-powered pocket calculators.


3 Requirements

The Environmental Label shown above may be used for the marking of products under paragraph 2, provided that they comply with the following requirements:


3.1 Energy supply by battery, accumulator or power unit shall not be admissable. Also, constructional design shall preclude the possibility of using these sources of energy.

3.2 Solar cells used in solar-powered pocket calculators must guarantee full functioning at a minimum illuminance of 50 lux.

3.3 No cadminated parts must be used.

3.4 Built-in capacitors must not contain any organic halogenated compounds (e.g. PCB).

3.5 not applicable


4 Compliance Verifications

Applicant shall declare compliance with the requirements.


4.1 for solar-powered devices: pursuant to paras. 3.1, 3.3 and 3.4.
The declaration is to be supplemented by data required according to para.3.2 (illuminance).

4.2 not applicable

4.3 not applicable

4.4 Such declaration is to be presented together with a Technical Data Sheet and/or Instructions for Use.


5 Applicants and Parties Involved


5.1 Applications may be filed by distributors of products pursuant to para. 2.

5.2 Apart from the parties involved in the award procedure:
(RAL, Umweltbundesamt [Federal Environmental Agency] and the Federal State where applicant's company is located) no further parties shall be involved.


6 Use of the Environmental Label


6.1 The terms governing applicant's use of the Environmental Label are stipulated by a Contract on the Use of the Environmental Label to be concluded with RAL.

6.2 Within the scope of such contract applicant undertakes to comply with the requirements under para. 3 as long as he makes use of the Environmental Label.

6.3 Contracts on the Use of the Environmental Label are concluded for the marking of products according to para. 2.
These contracts shall run until December 31, 2004. They shall be extended by periods of one year each, unless the contract is terminated in writing by March 31, 2004 or by March 31 of the respective year of extension.

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If you have additions to the above article please email:

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