Pt. 25, App. F 14 CFR Ch. I (1-1-19 Edition) (9) Instrumentation. Provide a calibrated recording device with an appropriate range or a computerized data acquisition system to measure and record the outputs of the calorimeter and the thermocouple. The data acquisition system must be capable of recording the calorimeter output every second during calibration. (10) Timing device. Provide a stopwatch or other device, accurate to Section1 second/hour, to measure the time of application of the pilot burner flame. (c) Test specimens. (1) Specimen preparation. Prepare and test a minimum of three test specimens. If an oriented film cover material is used, prepare and test both the warp and fill directions. (2) Construction. Test specimens must include all materials used in construction of the insulation (including batting, film, scrim, tape etc.). Cut a piece of core material such as foam or fiberglass, and cut a piece of film cover material (if used) large enough to cover the core material. Heat sealing is the preferred method of preparing fiberglass samples, since they can be made without compressing the fiberglass ( - box sample - ). Cover materials that are not heat sealable may be stapled, sewn, or taped as long as the cover material is over-cut enough to be drawn down the sides without compressing the core material. The fastening means should be as continuous as possible along the length of the seams. The specimen thickness must be of the same thickness as installed in the airplane. (3) Specimen Dimensions. To facilitate proper placement of specimens in the sliding platform housing, cut non-rigid core materials, such as fiberglass, 121-2 inches (318mm) wide by 23 inches (584mm) long. Cut rigid materials, such as foam, 111-2 Section1-4 inches (292 mm Section6mm) wide by 23 inches (584mm) long in order to fit properly in the sliding platform housing and provide a flat, exposed surface equal to the opening in the housing. (d) Specimen conditioning. Condition the test specimens at 70 Section5 SectionF (21 Section2 SectionC) and 55% Section10% relative humidity, for a minimum of 24 hours prior to testing. (e) Apparatus Calibration. (1) With the sliding platform out of the chamber, install the calorimeter holding frame. Push the platform back into the chamber and insert the calorimeter into the first hole ( - zero - position). See figure 7. Close the bottom door located below the sliding platform. The distance from the centerline of the calorimeter 426 VerDate Sep<11>2014 12:50 Apr 30, 2019 Jkt 247046 PO 00000 Frm 00436 Fmt 8010 Sfmt 8002 Y:\SGML\247046.XXX 247046 ER31JY03.010 spaschal on DSK3GDR082PROD with CFR first hole to the radiant panel and the distance between holes is the same as described in this paragraph.