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Lorad LPX Series System FAQ’s

How is the Constant Potential output of the Lorad LPX Series of X-Ray generators produced?
The line frequency AC input voltage is converted to high voltage DC using priority high frequency/high voltage power conversion techniques. This stable, highly regulated, low ripple, high voltage DC output is then applied to the X-Ray tube.

How often does the system need to be calibrated?
Standard radiography procedures require the use of penetrameters during radiography. The image of the penetrameter on each radiograph and the required density verify that adequate sensitivity and resolution are present to complete the required inspection. The Lorad LPX Series controls are not used to make any quantified measurements regarding object quality. The presence of the penetrameter image on each radiographic, in effect, tests the Lorad LPX Series systems with each radiographic taken. For these reasons, it is the opinion of the manufacturer that a defined calibration period is not necessary for the Lorad LPX Series of X-Ray generators.

Are all the Lorad LPX control units interchangeable?
All the control units within their kV range are interchangeable. (Example: The LPX160 control unit is interchangeable with all LPX160 models)

Can the Lorad LPX Series systems be shipped priority next day air?
Yes, Lorad LPX Series systems can be shipped for next day delivery, however be aware the shipment will be classified as HAZ MAT material. At the pilot’s discretion, the system can be “bumped” from the flight if the he determines that the amount of carried HAZ MAT classified cargo is too great in his opinion.

How much SF6 gas is contained in each respective tube head assembly?
6 ounces (170 grams) in a gaseous state for the LPX160.
9.2 (261 grams) ounces in a gaseous state for the LPX200.
32.4 ounces (919 grams) in a gaseous state for the LPX300.

Are there any restrictions on how Lorad LPX Series X-Ray generators can be shipped?
DOT-SP-10814 is a special exemption from the United States Department of Transportation, Pipeline and Hazardous Materials Safety Administration that allows shipment via the following modes of transportation: motor vehicle, rail freight, cargo vessel, cargo aircraft only and passenger-carrying aircraft.

To view the document, please click the link below:

DOT-SP-10814

What makes the Lorad LPX Series system desirable for Aerospace inspection applications?
Lorad LPX Series systems utilize an end-grounded exposed anode which allows for easier positioning of the tube head in limited space applications.

Certain applications require longer cable lengths but voltage drops occur when long cables are used. How does this affect the Lorad LPX Series system performance?
The Lorad LPX Series system monitors the kV and mA directly at the tube head assembly, not at the high voltage supply output like other systems. The control unit will sense any voltage drop and make the necessary corrections to assure that the requested kV and mA are provided at the tube head. Cable lengths up to 200 feet (61 meters) or more can be used with no change in performance.

Can longer cables be purchased?
There are cable adaptors available that allow the user to connect additional cables together.

Does Spellman sell the liquid coolant mixture for the cooler?
Spellman does not sell the liquid coolant mixture. In applications where freezing temperatures are not encountered, the user should not have to add the methyl alcohol and mix in the water soluble oil. If methyl alcohol is required due to freezing temperatures, it is recommended to use water soluble oil to counter act the effects of the alcohol on the internal components of the cooler. Although Texaco Soluble D oil is recommended, any equivalent can be used.

Can the Lorad LPX Series system be used with the new digital imaging capture systems?
The Constant Potential output and low ripple of the Lorad LPX Series systems makes it a perfect choice for digital imagining and film based applications.

What is lead time for Lorad LPX Series systems?
Lead time is 4-6 weeks.

If I send a unit in for service, what is the repair turnaround time?
From the time the unit is received via RMA, the estimate is 2 weeks after receipt of a purchase order for the repair.

What is the difference between a glass X-Ray insert and the metal ceramic X-Ray insert?
There is no change in power or performance. The main difference is in cost, with the metal ceramic X-Ray tube being 2-3 times more costly. The glass X-Ray tube does not seem to be as sensitive to periods of inactivity as does the metal ceramic X-Ray tube. It is recommended that either X-ray tube be warmed up periodically, and also before each use to insure maximum X-Ray tube life.

What is the life expectancy of an X-Ray tube?
As long as the X-Ray tube is warmed up on a periodic basis, not subjected to shock or abuse, under normal circumstances, the X-Ray tube manufacturer feels 4000 to 5000 hours can be achieved.

What is the "Exposure Library"?
The Lorad LPX Series systems come standard with an exclusive microprocessor-driven controller. In addition to automatic warm-up and self-diagnostic circuitry, the LPX Series systems have memory capability (Exposure Library) to store and recall up to 250 exposure techniques and will retain the last set of exposure parameters present before powering down.

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