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Stabilant 22 Contact Enhancer Application Notes

App. Note 40 - Solving Sensor Problems

Background

Sensors have been with us ever since the days when Watt invented the flyball governor for steam engine speed regulation. While we are seeing an increase in optically-encoded outputs suitable for optical-fiber cable use, most sensors we encounter today use electrical signals to transmit their output back to the controlling device With the increase in microprocessor-controlled signal processing the signal levels in the wiring harnesses have generally dropped to TrL/MOS levels, that is, voltage under 5 volts and with correspondingly low currents.

Unfortunately for the reliability of equipment whose operation is controlled by sensors, connector reliability at these voltage sorts and power levels has lagged behind the demands placed upon them and the consequences are, for example, that it is estimated that 10% of all automobiles stalled on the roadside are suffering from a electrical connector failure of somesort.

The same conditions exist in many other areas, be it untimely landing-gear retraction caused by "squat-switch" failure to unnecessary rejections of IC's during the final acceptance tests caused by improperly functioning test fixture connectors.

Where "sensor-failures" occur, the lost-of-time and loss-of-product can be expensive The cost of replacing perfectly-good sensors because of the malfunction of a connector (whose cost is generally only a fraction of the cost of the sensor itself) can really hit a service group in the pocketbook. Normally, reimbursement of the service group for labor and parts costs are dependent upon testing by the manufacturer to verify that the assembly is actually at-fault. The problem is that a simple disconnect an reconnect cycle will usually clear up the connector problem (for a short time anyway) and thus the faulty connector may perform flawlessly under the manufacturer's testing conditions. Not only is the customer annoyed by the original down time, but the service group is out-of-pocket. Another problem is the potential for loss of goo relations between the dealer and customer, and between the manufacturer an dealer.

Often the long-term duty cycle of the equipment can increase the problem. For example, in the agricultural implement field, the situation can be aggravated by the that the equipment is usually laid-up for the major part of the year and then is called upon to function perfectly during several weeks of intensive use. It is not unusual f farmers to run their combines on a multiple-shift basis to bring in the crop as soon a the grain ripens, thus any worst-case down-time can increase the potential for major financial loss to the farmer due to adverse weather conditions.

Can Sensor-Connector Problems be Reduced?

Yes, the Stabilants have proven to be very effective in improving the reliability of connectors in general and are developing a reputation for ease and speed of use under field conditions. Not only are many OEM's pre-treating sensor connectors during manufacture, many are providing the Stabilants to their service technicians either as Standard Store items, or recommending them for field procurement.

The Stabilants are presently used in applications ranging from Avionics through Process control, including such critical fields as Bio-medical electronics, Air-Traffic Control, Police & Emergency communications and the like.

How are the Stabilants applied?

The application of the Stabilants is exceptionally easy. Just use a drop of two of Stabilant 22A, for example, on one of the sensor connectors and any other in-signal-path connector in the wiring harness, and reconnect the system.

Not only are they are easy to use but they have so many potential applications in industry, automotive, farm and even in the home (on everything from Computers, C4 TV, & Stereo Systems) that they should be in everyone's tool-kit!

Revision 1


Stabilants are a product of Dayton Wright research & development and are made in Canada

NSCM/Cage Code - NATO Supply Code 38948

15 mL of S22A has NATO Part # 5999-21-900-6937


The Stabilants are patented in Canada - 1987; US Patent number 4696832. World-wide patents pending. Because the patents cover contacts treated with the material, a Point-of-sale License is granted with each sale of the material.

MATERIAL SAFETY DATA SHEETS ARE AVAILABLE ON REQUEST


Stabilant, Stabilant 22, and product type variations thereof are Trade Marks of D.W. Electrochemicals Ltd.

Copyright 2003 - D.W. Electrochemicals Ltd. This note may be reproduced or copied, provided its content is not altered. The term "contact enhancer", 1983 Wright Electroacoustics.


NOTICE: This Application Note is based on customer-supplied information, and D.W. Electrochemicals is publishing it for information purposes only. In the event of a conflict between the instructions supplied by the manufacturer of the equipment on which the Stabilant material was used, and the service procedure employed by our customer, we recommend that the manufacturer be contacted to make sure that warranties will not be voided by the procedures.

While to our knowledge the information is accurate, prospective users of the material should determine the suitability of the Stabilant materials for their application by running their own tests. Neither D.W. Electrochemicals Ltd., their distributors, or their dealers assume any responsibility or liability for damages to equipment and/or any consequent damages, howsoever caused, based on the use of this information.

Stabilant, Stabilant 22, and product type variations thereof are Trade Marks of D.W Electrochemicals Ltd.

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Stabilant
Stabilant 22 Contact Enhancer

Stabilant 22 Contact Enhancer

We carry the complete line of Stabilant products. Looking for something not listed here? Please contact us.
Stabilant 22
APPLICATION NOTES
1. Electronic Equipment
2. Computer cards
3. Schadow switches
4. Mic connectors
5. RTS & Dual plug patch bays
6. Biomedical Electronics
7. Computing & Peripherals
8. Cable TV
9. Robotics
10. Environmental Impact
11. Recording studios
12. Broadcast equipment
13. Mobile Radio
14. Educational computing
15. Stereo systems
16. Aid to IC insertion
17. Navigational equipment
18. Card edge conn. problems
19. Complex process control
20. Automotive service
21. Gold plating/solder alloy
22. Very high humidity
23. High current thermal runaway
24. Car stereo systems
25. Plastic element pots.
26. Farm machinery & trucks
27. Model & hobby
28. RF case seals
29. Outdoor environments
30. Computer crashes
31. Relays & switches
32. Silicone problems
33. Tin-plated contacts
34. Solder flux & resin residue
35. Post application color tinting
36. Aircraft connectors w/ flurosilicones
37. Avoiding unsafe solvents
38. S22 R&D Design Goals
39. Stabilant use on PLCC's
40. Sensor problem solution
41. Repair of flood damage
42. Marine electrical & electronics
43. All Cameras & Video Equipment
44. SCSI removable SCA drives, caddies & connections
45. Home Theater & Computer Connectors

Some of these application notes are repetitive of material in other application notes. We realize this. But some were written as a reference to a contact problem in a particular field or application.

NOTICE: This data has been supplied for information purposes only. While to our knowledge it is accurate, users should determine the suitability of the material for their application by running their own tests. Neither R.A.L. Audio Services, D.W. Electrochemicals Ltd., their distributors, or their dealers assume any responsibility or liability for damages to equipment and/or consequent damages, howsoever caused, based on the use of this information.
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Stabilant 22
REVIEWS
Over the years, Stabilant 22 has been highly parsed in publications that target a wide range of electronics applications including:
* Andrew Marshall's Audio Ideas Guide
* BYTE Magazine (7 articles)
* Windows Magazine
* Q.S.T. Amateur Radio
* Model Railroads (2 articles)
* Motor Magazine
Stabilant 22
TECHNICAL NOTES
1. MSDS - Stabilant 22
2. General Information
4. MSDS - Stabilant 22A
5. MSDS - Stabilant 22E
9. MSDS - Stabilant 22L
20. Military Applications
21. Elastomer Compatibility
22. Effectiveness of Stabilants
24. Connector Harmonic Distortion
39. Signal rise time

There are gaps in the sequence numbers below because some Technical Note s were written by the manufacturer for specific companies and are confidential.

NOTICE: This data has been supplied for information purposes only. While to our knowledge it is accurate, users should determine the suitability of the material for their application by running their own tests. Neither R.A.L. Audio Services, D.W. Electrochemicals Ltd., their distributors, or their dealers assume any responsibility or liability for damages to equipment and/or consequent damages, howsoever caused, based on the use of this information.
Stabilant
Stabilant 22 Contact Enhancer

Stabilant 22 Contact Enhancer

We carry the complete line of Stabilant products. Looking for something not listed here? Please contact us.

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