PHOTO TACHOMETER Model DT-2234B
CONTACT TACHOMETER Model DT-2235B
Range 5 to 99,999 RPM 0.5 to 19,999 RPM
Surface Speed (m/min.) :
0.05 to 1,999.9 m/min.
Surface Speed (ft/min.) :
0.2 to 6,560 ft/min.
Resolution RPM 0.1 RPM < 1,000 RPM RPM 0.1 RPM < 1,000 RPM
1 RPM 1,000 RPM 1 RPM ≧1,000 RPM
0.01 m/mim. < 100 m/min.
Surface 0.1 m/min. ≧100 m/min.
Speed 0.1 ft/min. < 1000 ft/min.
1 ft/min. ≧1,000 ft/min.
Display 5 digits, 10 mm ( 0.4" ) LCD. 5 digits, 10 mm ( 0.4" ) LCD
Accuracy ± ( 0.05 % + 1 digit ). ± ( 0.05% + 1 digit ).
Sampling Time 1 second ( 60 RPM ). 1 second ( 6 RPM ).
Time base Quartz crystal . Quartz crystal .
Photo Tach. 50 to 150 mm/2 to 6 inch.
detecting * Typical max. 300 mm/12 inch
distance depending upon ambient light.
Circuit Exclusive one-chip of micro- Exclusive one-chip of microcomputer
LSI circuit. LSI circuit.
Battery 1.5 V AA (UM-3) battery x 4 PCs. 1.5 V AA (UM-3) battery x 4 PCs.
Operating temp. 0 to 50 ℃ ( 32 to 122 ℉). 0 to 50 ℃ ( 32 to 122 ℉).
Memory Last value, Max. value, Min. value. Last value, Max. value, Min. value.
Size 190 x 72 x 37 mm (7.5 x 2.8 x 1.5 inch). 208 x 72 x 37 mm (8.2 x 2.8 x 1.5 inch).
Weight 250g (0.55 LB)/including battery. 280g (0.62 LB)/including battery.
Accessories Carrying case .............................. 1 PC Carrying case .............................. 1 PC
Reflecting tape marks (600 mm) RPM adapter (CONE)..................... 1 PC
................................................... 1 PC RPM adapter (FUNNEL)................. 1 PC
Operation manual ........................ 1 PC Surface speed test wheel............... 1 PC
Operation manual ........................ 1 PC
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