Datasheet

TACHOMETER/STROBOSCOPE, Model : DT-2259
( 2 in 1, DIGITAL PHOTO TACHOMETER with DIGITAL STROBOSCOPE )
FEATURES
* Intelligent, microprocessor circuit design, high accuracy, wide range, digital readout.
* One instrument include two functions of " Digital Photo Tachometer " & " Digital Stroboscope "
* Digital Stroboscope
:
Wide setting range from 100 RPM to 100,000 RPM, digital display with high accuracy. Modern
solid state high visible orange light, long life, almost maintenance free. It is ideal for inspecting
and measuring the speed of moving gears, fans, centrifuges, pumps, motors and other equipment
used in general industrial maintenance, production, quality control, laboratories and as well as for
schools and colleges for demonstrating strobe action.
* Digital Photo Tachometer
:
No contact RPM measurement, wide measuring range from 0.5 to 100,000 RPM. 0.1 RPM
resolution for the measured value < 1000 RPM. The last value, max., value, min. value can be
stored into the memory automatically & be obtained by pressing " Memory Call Button ". High
visible LCD display gives RPM reading exactly with no guessing or errors.
*
T
he use of durable, long lasting components, including a strong, light weight ABS plastic housing.
Cabinet has been carefully shaped to fit comfortable in either hand.
GENERAL SPECIFICATIONS
Display 5 digits, 10 mm ( 0.4" ) LCD Operation 0 - 50 (32 - 122 ).℃℉
( Liquid Crystal display ) with
T
emperature
function annunciation. Operating Less than 80% RH.
Accuracy ± ( 0.1 % + 2 digit ). Humidity
Sampling Time 1 second ( 60 RPM ). Size 215 x 65 x 38 mm.
T
ime base :Quartz crystal. (8.5 x 2.6 x 1.5 inch).
Circuit Exclusive one-chip design Weight 300g(0.66 LB)/including battery.
microprocessor LSI circuit. Accessories : Carrying case ................... 1 PC.
Battery 4 x 1.5V AA ( UM-3 ) battery. Operation manual ..............1 PC.
ELECTRICAL SPECIFICATIONS ( PHOTO TACHOMETER )
Measurement Range 5 to 99,999 RPM
Resolution 0.1 RPM ( < 1,000 RPM ) 1 RPM ( 1,000 RPM )
Photo Tach. detecting distance 50 to 150 mm/2 to 6 inch.
*
T
ypical max. 300 mm/12 inch depending upon ambient light.
ELECTRICAL SPECIFICATIONS ( STROBOSCOPE )
Stroboscopic 100 to 100,000 FPM/RPM Flash tube High efficiency orange LED
Flash Rate
FPM : flash per minut
e
lamp.
RPM : round per minut
e
Flash Duration Approximately 60 to 1,000
Flash Adjust 3 ranges : microseconds.
Range Range A: 100-1,000 FPM Flash color Orange
Range B: 1,000-10,000 FPM Flash Duration Approx. 16% of period time.
Range C: 10,000-100,000 FPM Flash Adjust Coarse adjust knob and
Resolution 0.1 FPM/RPM. Knob Fine adjust knob.
(Less than 1,000 FPM/RPM) Calibration Crystal time base and
1 FPM/RPM microprocessor circuit, don't
(Over 1,000 FPM/RPM) necessary take any external
calibration process.
OPERATIONS PROCEDURES ( STROBOSCOPE )
Preparation Determine the range switch to " 1000 RPM " ," 10,000 RPM " or
" 100,000 RPM " position.
Checking When checking speed, care must be taken to insure that the strobe is flashing in
Speed unison (one to one) with the object being monitored. A Stroboscope will also
stop motion at 2:1, 3:1, 4:1 et., this is normally referred to as harmonies. To be
sure of unison, turn the dial until two images appear - this will double the actual
speed. Then lower the flashing rate until a single and stationary image appears -
this is the actual true speed.
Checking For motion analysis, simply locate the actual speed as mentioned above and then
Motion turn the dial slowly up or down. This will give a slow motion effect allowing
complete inspection.