Q: How quickly can it change the vacuum level? A: Rate of change is highly dependent on air volume- i.e.; cylinder size. With a typical 2" penis cylinder, the net volume in use is about 8 cubic inches. Removing only 1.33 CI will produce a 5" vacuum level, which would take about 1/3 of a second for the QS-7.
With a large cylinder like our ASTJ, the net volume might increase 10 fold to 80 CI, requiring the removal of 13.3 CI to achieve a 5" vacuum. When the air volume goes up, the rate of change slows down. Penis cylinders will respond very fast, big combination cylinders will be slower. The amount of tubing and connections also affect flow rates and change timing. Being able to adjust the pressure and timing allows QS-7 users to compensate for many variables, within the systems design range.
Q: What do you mean by "Dynamic Pumping"? A: A conventional vacuum pump, hand or electric, provides a source for STATIC vacuum. This means you set it to a pressure level and then it just sits there- it's inactive, unchanging . If it was sound, "Static" output would be one note at one volume held indefinitely, like a stuck car horn.
DYNAMIC is the opposite of static; it means the pressure level is active and changing continuously. The QS-7 allows the changes to be controlled both in pressure level and timing by the user. Again, if it were sound- the output of the QS-7 would be music!
Q: How much air can the system pump per minute? A: The QS-7 pump moves 4 liters or 244 cubic inches per minute of free air. Net volumes of any vacuum system can vary, depending on tubing, cylinders and constrictions of the configuration.
Q: What is the maximum vacuum level the system can generate? A: The peak vacuum level is 16"-17". We feel this is a dangerous level, and have capped the peak pressure within the software for programmable operation. At this time, we have set the maximum at 12". Of course, normal and proper use should be much lower than that.
Q: How hard is it to make a "profile"? Can I buy profiles instead? I'm not a programmer. A: If you can do the most basic computer navigation, you can create profiles. Learning time- perhaps 5 minutes. There will be no profiles for sale. We will have a library you can download profiles from or contribute them to, always FREE. Users can trade them, attached to e-mails. It's a snap, thanks to some very good software engineering.
Q: Will the software be available in Mac format? A: At this time it is only compatible with the Windows PC format.
Q: Can the QS-7 be used with European power? A: We are international, so one of the design objectives for the QS-7 was world-wide compatibility. Just purchase a plug-in power adapter locally which will connect to the common power source in your country. Be sure it meets the needs of the QS, as follows: Output: 12V DC. Amp rating: 1A, or 1000ma. Plug: 5.5 x 2.5mm. This kind of adapter is easy to find, and a power/polarity diagram is included with each unit.
Q: Can I pump wet with it? A: Yes- but you are responsible for not allowing water into the system, which will void your warranty. We urge all users who will be wet-pumping with a QS-7 to protect their equipment from accidental flooding with use of an in-line fluid trap.
Q: Can I use the QS-7 with a sun tea jar? A: The QS-7 moves air in a manipulated pattern. It does not care what the air container is made of- but you should. Most sun tea jars are glass, which is subject to stress cracking. Continuous manipulation of pressures means that the stresses applied to the cylinder walls are constantly changing, and we recommend you do not expose glass containers to that action. If you can't afford a professional cylinder, stick to a static level or hand pump.
Q: Why isn't there a dial gauge on the system? A: Mechanical gauges are notoriously inaccurate, and would be taking the system backwards, technically. But there is a "gauge". When profiles are running (QS Mode) there is a highly accurate digital display of current pressure on the screen, reading in inches and tenths.
Q: All the electric pumps I've seen that work are big and noisy. How can it be quiet, and so small. Being small, how can it pump as much air? A: In a word, efficiency.. Efficient in design, efficient in use of power, efficient in use of capacity. If you really miss the weight, you can always tape a brick on top of it.
Q: How long will the motor and pump last? A: In this configuration and application, the MTBF's should provide a bit over 7,000 hours of pumping sessions. That's one hour a day, every day, for 20 years. By then, we will have a new model out that you will want anyway!
