LONN New Portable Digital Laser Photo Contact Tachometer DT2236B 2in1 RPM Surface Speed Tester Tach Meter

The use of durable, long-lasting components, including a strong, light weight ABS-plastic housing assures maintenance free performance for many years. The housing has been carefully shaped to fit comfortably in either hand. MEASURING CONSIDERATION 2-1 REFLECTIVE MARK Cut and peel adhesive tape provided into approx. 12mm (0.5") squares and apply one square to each rotation shaft. a. The non-reflective area must always be greater than the reflective area. b. If the shaft is normally reflective, it must be covered with black tape or black paint before attaching reflective tape. c. Shaft surface must be clean and smooth before applying reflective tape. 2-2 VERY LOW RPM MEASUREMENT As it is easy to get high resolution and fast sampling time. If measuring the very low RPM values, suggest user to attach more "REFLECTIVE MARKS" averagely. Then divide the reading shown by the number of "REFLECTIVE MARKS" averagely. Then divide the reading shown by the number of "REFLEC- TIVE MARKS" to get the real RPM. 2-3 BATTERY REMOVEMENT If the instrument is not be used for any extended period, remove batteries. 3. MEMORY 3-1 A readout (the last value, max.value, min.value) obtained immediately before turning off the MEASURE BUTTON is automatically memorized. For example, please ref. following fig. 1. 3-2 That Memorized value can be displayed on the indicator by turn once depressing the memory button. The Symbol "UP" represents the Max. Value and "dn", the Min Value; "LA", the last Value.