... ,5min,10min,15min,20min,1h,8h,24h and manual timing set(Maximum: 24h). Main performance is in accordance with IEC 61672 ... Sound Level Meter adopts 128×64 LCD display, menu operation,clock set, 24h clock display, auto-meter and store data functions. It can ... ,Ln.7.Measuring Time Set: Man,10s,1m,5m,10m,15m,20m,1h,8h,24h,24h time8.Clock: Y/M/D Hour ...