multifunction sound level meter sl-5868p multifunctional sound level meter this sound level meter is small in size, light in weight, easy to carry. although complex and advanced, it is convenient to use and operate. its ruggedness will allow many years of use if proper operating techniques are followed. please read the following instructions carefully and always keep this manual within easy compatible with standards of iec 651 type 2, ansi 1.4 type 2. widely used to test the sound level of environment, machinery, vehicle, ship and other noise. multifunctional. it offers 4 measurement parameters: lp (sound level), leq (equivalent continuous a sound level), lmax (maximum sound level) and ln (percent of all readings over alarm value set.） with alarm set and alarm output. this meter permits choice of 'a', 'c', or 'flat' weighting and 'slow' / 'fast' response times. dc output: 0~2v. auto range selection and digital display with no guessing errors. manual or automatic shut down.the tester can be switched off by pressing the power key at any time. on the other hand, the tester can be set to auto power off between 1 to 9 minutes or disable auto power off. the tester can memorize 30 groups of measurement results and measuring conditions for later use or download to pc. can communicate with pc computer for statistics, printing and analyzing by the optional cable and the software for rs232c interface 2.specifications display:14mm (0.55＂) lcd with backlight parameters measured: lp, lmax, leq , ln. measurement range: lp: 30~130db (a) 35~130db (c) 35~130 db (f) leq: 30-130db (10s, 1min, 5min, 10min, 15min, 30min, 1hour, 8hour, 24hour) ln : 0-100% resolution: 0.1 db accuracy: ± 1db frequency weighting:'a', 'c', 'f' (flat) time weighting :fast (125ms) slow (1 second) microphone:1/2 inch electret condenser type memory: 30 groups with measuring conditions built in calibration signal: 94db at 1khz (sinusoidal) frequency range: 31.5 to 10,000 hz alarm value set: 30-130 db alarm output: led and optional relay contact pc interface: rs232c low battery indication power supply: 4x1.5v aaa (um-4 battery) e-mail:sale@landteknet.com web: http://www.landteknet.com