 | Single-envelope metal halide UV radiators with additives of iron and cobalt (HPA) or lead and gallium (HPM).Their high quality is expressed in long life, high radiant efficiency, excellent UV output, and arc stability. The spectrum of HPA repro lamps is optimised for UV-A ultraviolet radiation, while HPM repro lamps radiate in the DIAZO range. These spectra also contain some UV-B and UV-C, which are harmful to eyes and skin. The lamps do not produce ozone. Appropriate measure should be taken to protect eyes and skin against direct irradiation. | Most of the lamps are designed to run at several power levels e.g. standby, medium and full. For optimal operation, the bulb temperature should be kept between 750 and 950° C, with a maximum at the pinches of 350° C. This requires forced air cooling, adapted to the power level. ApplicationsContact copying of images from transparent film to a UV-sensitive carrier e.g. another film, offset plate, silk screen, printed circuit board, microfilm. The type of lamp used depends on the spectral sensitivity of the carrier. UV curing of glue, resin and pigmented lacquer. |
1) First electrical value is measured free burning on reference impedance (see table with circuit data) at 0 hours. Second value gives indication of stand-by operation. 2) Maximum time to reach 90% of UV-output after cold start on reference circuit. 3) UV irradiation measured perpendicular to lamp axis at 1 m distance with a relative spectral sensitivity according to IEC. UVA is the wavelength range between 315-400 nm, DIAZO between 320-440 nm. 4) Percentage of UV output at 750 h compared to 0 h. The lifetime at which maximum 10% of a large batch of lamps have failed is also specified at 750 h for all HPA/HPM lamps. This lifetime and UV-maintenance is reached under following test conditions: - Pinch temperature: 350° C max. - Bulb temperature: 950° C max., 750° C min. (also at reduced power!) - Switching cycle 5h30' ON, 30' OFF. Horizontal burning position. 5) For a definition of Overall Length (OAL), see drawing of lamp base dimensions. 6) Cable terminal type: T=straight faston terminal, RT= round terminal, F= flag faston, no symbol= stripped end. |
7) For inductive circuits, the impedance of the ballast is given. For transformer type circuits, see Test circuit. 8) The four ballast test circuits are only given for design purposes. A custom designed ballast is preferred in practice. With two ballast systems, one of the ballasts may be switched to achieve stand-by operation. |
Max. current of 380 MZN 4000 ignitor is 18 A. For lamps with a higher lamp current (HPM 25C, HPM 5005, HPA 5035R): place a second ignitor in parallel, or bridge the ignitor with a switch closing immediately after ignition. |