Recalibration of Retrotec Infiltrometer

The NFPA Appendix C requires recalibration of only the room pressure gauge every year. Ask Retrotec for an exchange 60 Pa. gauge and be sure to specify whether the tubes go out the back for the model 870 “kickstand model “ or out the side for the model 970 suitcase style. Gauge clip styles all go out the side.

Users of CA2001 software will be supplied with a new calibration file to download that will record the required date and update your software’s printout of its calibration data.

The NFPA Appendix C requires recalibration of the complete system every 5 years. The entire system must be sent back for recalibration and checking in our flow chamber. Send back both blowers, low flow plates and console. Panels don’t need to be returned for the 5-year calibration, but we will check them out if you do send them back. New certificates will be issued.

Our series 600, 700, 800 and 900 and 2000 flow measurement systems do not require more frequent recalibration unless they are damaged to the extent that their physical dimensions are changed drastically, or if Field Calibration Checks repeatedly show that the system is inaccurate.

The measurement method used in our system relies upon the physical dimensions of an annular nozzle which has well-documented flow characteristics. Flow is proportional to the square root of the pressure drop across the nozzle. Obvious changes in nozzle size introduce relatively small errors.

We have checked numerous Retrotec Infiltrometers after one (1) year of field use and have never found their calibration to be out more than the specified accuracy of (+/-) 5 percent.

A quick check of the gauge can be made by "Y" connecting the HOUSE PRESSURE and FLOW PRESSURE gauges together and elevating the pressure in the common tube to see if they read the same. It should be noted that similar absolute percent errors in these two gauges cancel each other out to a great extent in a test.

Calibration facility for gauges.

Calibration facility for blowers.

2000 Fire Door-Fan Manual

updated 2002-05-28

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Canon 2000 manual Recalibration of Retrotec Infiltrometer
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2000 specifications

The Canon EOS 2000D, also known as the Rebel T7 in some regions, is an entry-level DSLR that caters to beginners and amateur photographers looking to explore the world of digital photography. Launched as a successor to the EOS 1300D, the 2000D brings a host of features and technologies that make it an appealing choice for those stepping up from smartphone photography.

One of the standout characteristics of the Canon 2000D is its 24.1-megapixel APS-C CMOS sensor. This high-resolution sensor enables users to capture stunningly detailed images with vibrant colors and rich tonal range. Coupled with the DIGIC 4+ image processor, the camera delivers improved performance in terms of image quality, low-light capability, and overall processing speed.

The Canon 2000D features a 9-point autofocus system that includes one cross-type point, helping users achieve accurate focus on subjects. While this autofocus system may not be the most advanced in the market, it is sufficient for general photography tasks, including portraits, landscapes, and even some action shots.

The camera boasts a 3-inch LCD screen, which provides a clear interface for composing shots and navigating settings. Although it lacks a touchscreen, it offers straightforward usability that appeals to novice photographers learning the ropes of DSLR operation. The optical viewfinder with approximately 95% coverage allows users to view scenes through the lens for precise framing.

For those interested in videography, the 2000D offers Full HD 1080p video recording at 30 frames per second. While it may not excel in advanced video features, it provides a solid entry point for hobbyists looking to experiment with video content. The presence of built-in Wi-Fi and NFC capabilities allows for easy sharing of images and remote control of the camera via a smartphone app, enhancing the overall user experience.

Additionally, the Canon 2000D supports a range of Canon's EF and EF-S lenses, providing users with the flexibility to explore various photography styles. Its compact and lightweight design makes it highly portable, making it a great companion for travel and everyday photography.

Overall, the Canon 2000D is a versatile and user-friendly DSLR that strikes a balance between image quality, functionality, and ease of use, making it an excellent choice for those embarking on their photographic journey.
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