Thursday, November 20, 2014

3M 701 Static Control Test Kit on Flickr

Our 3M rep, Dave Leventhal, stopped by Q Source the other day to demo 3M’s 701 Static Control Test Kit. In addition to making a video of the demo (available on our YouTube Channel), we also snapped a few pics to share with you. The 3M 701 includes all of the items needed to simply and accurately test mats and other surfaces. Check out our latest Flickr photo set for a closer look.

To purchase the 701 Test Kit please visit

Wednesday, November 19, 2014

Bevco 9000 Series Added to Top-Quality Chairs w/Numerous Options

We've recently added more than 330 Bevco Ergonomic Seating 9000 Series Chairs to (adding to the hundreds of other Bevco seating solutions we offer online). This top-quality line of regular, cleanroom, and ESD-safe chairs come standard with a number of impressive features and also provide a variety of options to allow for customization to your exact requirements.

Bevco's 9000 Series features adjustable backrests with lumbar support, pneumatic height adjustment, 360ยบ swivel, and 300-lb. weight capacity as standard specs. Depending on the model, there are options based on cleanroom class, height adjustment range, color, material, and type of glides. Visit our Web site or contact us for assistance with building seating solutions to meet your needs.

To purchase your Bevco 9000 Series Chairs, please visit the 9000 Series Department at or visit the Bevco Ergonomic Seating page for our full selection of Bevco products. You may also contact us via our Web site, by phone (800-966-6020), or by email.

If there's a product or topic you'd like to see The Q Source Resource write about please let us know. We'd also appreciate if you share this blog post with your friends and colleagues via the social media links below. If you have questions or comments about these exclusive Bevco Ergonomic Seating products, please either leave us a message in the comments section or contact us directly.

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Thursday, November 6, 2014

3M’s 724 Dual-Wire Workstation Monitoring Kits: All You Need to Create a Static-Safe Workstation

Do you have work areas/stations you need to monitor for static safety? Confused about what you need or what works together well to accomplish such monitoring? 3M has now made it a little easier for you with their new 724 Dual-Wire Workstation Monitoring Kits.

These two kits (identical other than the color of the included table mat) offer a ready-to-use monitoring solution that as all you need to create and maintain a static-safe workstation. The 3M 724K-WM10 724 Dual-Wire Workstation Monitoring Kit w/Gray 8810 Mat and 724K-WM11 724 Dual-Wire Workstation Monitoring Kit w/Blue 8811 Mat include the following:
  • 724 Dual-Wire Workstation Monitor
  • 2368 Dual-Wire Fabric Wrist Band for Monitors
  • 2360 Dual-Conductor 5’ Ground Cord
  • 8810 or 8811 Dissipative Rubber Table Mat in gray or blue, respectively
Each kit regularly sells for $284.18, but you'll save more than $30.00 when you purchase them at Visit our 3M 724 Dual-Wire Workstation Monitor Kit page to place your order or contact us by phone (800-966-6020) or via email.

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Wednesday, November 5, 2014

More About the Basics of Flux in Electronics Soldering – Guest Blog

by Steve Allen, VP Marketing and Innovation, ACL Staticide

Steve Allen, from ACL, is back with a further discussion of the basics of flux in electronics soldering

For those of us associated with the electronics manufacturing industry, we are well aware that solder flux is a very important part of the soldering process. Flux is necessary to reduce the oxides that tend to form whenever you have hot metals in contact with the air. In electronics, we use a rosin-core solder, a mild no-clean solder, a more aggressive lead-free solder, or a water-soluble solder to aid the soldering process and eliminate metal oxides. We take great care regarding flux to make sure that we have selected a product that's not plumbing flux or acid-core flux because we know that will tend to corrode parts and components over time; they're okay for pipes but not for electronics.

In many cases, we're looking at rosin solder flux (in paste form) for most applications. If the temperature's a little bit colder, it will tend to crystallize and solidify. But it can be melted with a little bit of heat from the soldering iron. Of course, when you heat flux it tends to produce smoke, so it's good to have ventilation or a fume extractor to be sure that you're not breathing in the caustic vapors created from heating the flux. When you heat a work piece, flux reacts with the metal oxides that are forming with the temperature and exposure to the air. These residual metal oxides tend to interfere with the metal-forming process of soldering. Flux will chemically react with these oxides to make a nice, clean metal from the solder forming process that will form a pristine alloy on the board.

As we know, many solders come with flux in the core. The solder is actually hollow and inside the solder wire there is a central core of flux. As you feed the solder into your work piece, the flux then distributes itself over the surface of the work, reducing the formation of metal oxides and preventing them from occurring during soldering. Flux core solder can be helpful in many soldering instances for small, specific solder and repair projects. Additionally, we should talk about water-soluble flux, which is a recent and significant improvement in flux. With water-soluble flux, cleaning becomes easier. With rosin-core flux, the flux is not water-soluble. It takes an aggressive solvent cleaner to dissolve it and to remove it from the work piece. While easier to clean, water-soluble flux may not be appropriate in all circumstances. It can leave a residual layer that may interfere with high-impedance and high-resistance circuits where you have resistances (10 mega-ohms or greater). The water-based flux may actually lower that resistance and cause the circuit to malfunction.

Solder flux is an essential element when soldering, as it makes the soldering project much easier and of higher quality. Unfortunately, leaving even the no-clean fluxes behind on a PCB can cause some serious issues in circuit performance and even disable components. As part of the basics of flux, it's important that we understand what leaving flux on a PCB can do to your circuit.
Leaving fluxes behind can seriously damage a PCB.

In many instances, no-clean flux may not need to be cleaned from a circuit to prevent the flux from physically destroying the circuit. Unfortunately, the presence of flux changes the capacitance between traces, conductive pins, and circuits, and can ultimately get into the mechanical workings of electromechanical components and bind them up. Flux that requires cleaning is very acidic and can eat away at traces and pins, changing their resistance and even destroying surface mount components if the flux is left in place too long.

One particular location in board rework and repair, where the direct presence of residual flux has a significant impact, is on or near the input circuits to a differential input. Differential inputs are often balanced and used for very precise measurements. The presence of flux here will not only throw off any measurement, but can cause the readings to drift significantly over time.

Electromechanical components are also significantly impacted by flux. Often these components are soldered in by hand in the first few prototypes. The hand soldering of these components often works just fine, and the circuit moves on to an initial low-rate production run where problems start to occur in switches and other “mechanical-based” components. Often what happens is that the change in flux application techniques causes flux residue to build up inside the mechanical component and either prevents it from physically moving or makes the switch work intermittently. Troubleshooting these problems is extremely difficult and can lead to significant time loss during troubleshooting. This leads to quality problems we are trying to prevent.

Often when making prototypes components will be hand-soldered in place, circuits will be modified during testing, and parts will be replaced. Each of these operations requires the use of flux, which will need to be cleaned. ACL has developed a complete line of flux removers for all of these specific applications.

No Cleaning – If the circuit is slow, not susceptible to noise errors or increased DC offsets, then no cleaning could work just fine. However, for most circuits leaving the solder flux on the board will cause errors and make troubleshooting much more difficult.

Hand Cleaning – Better than no cleaning at all. Circuits see faster warmup periods and less current offset issues.

Soaking in an Aerosol Solvent Spray – Similar to hand cleaning, aerosol soak and rinse methods can be very helpful in cleaning out mechanical components where hand cleaning simply can't reach.

While it is tempting to save the 10 minutes or so and not perform a proper cleaning, for precision circuits, cleaning is an essential step in the testing and manufacturing process. Keeping a PCB board free of flux build up will save countless days in the testing and troubleshooting process and significantly reduce the stress of tracking down random errors and quality problems. Invest the money and time in an effective cleaner and cleaning process and spend more time building and designing great circuits (rather than countless hours troubleshooting problems).

Thanks Steve, for yet another Guest Blog full of must-have info that our Q Source Resource readers can apply to their own work environments.

For information about ACL Staticide and their related products, please visit our ACL Staticide Department at

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