User Guide

Instruction Manual
Model DT-105A
Handheld Contact
LCD Digital Tachometer
Features
The Shimpo DT-105A is a battery operated, handheld,
microprocessor-controlled contact type tachometer. It
incorporates the latest micro-circuit technology and offers:
! Multi-mode capability – measures RPM, FPM, YPM, mPM
and other units without special accessories
! Large memory capacity
! Wide speed range with automatic floating decimal point
! C-MOS single chip microprocessor for high reliability and
low maintenance
! Rugged construction - die-cast aluminum housing
NOTE: When using master wheel, accuracy can be affected
as much as 0.3% of reading
CAUTION: Although tachometer alone is able to achieve
above ranges, the master wheel has a maximum speed limitation
of 5,000 FPM (for safety reasons).
MODEL DT-105A
Display Range 0.10 to 25,000 rpm with floating decimal
Accuracy ±0.06 rpm: 0.10 to 999.99 rpm
±0.6 rpm: 1,000.0 to 9,999.9 rpm
±0.006% of reading ±1 digit (or ±2rpm max.): 10,000 to 25,000 rpm
Display 5 digit 0.47" (12mm) high LCD
Measuring Units Revolutions: RPH, RPM Feet: FPH, FPM Miles: MPH
Yards: YPH, YPM Inches: IPM Meters: mPH, mPM
Length: m, cm, inches, feet, yards Total revolutions: REV
Memory System 13 readings are stored in memory and retained for
5 minutes (last, max., min. and 10 extra measurements)
Detection Optical coupler , 60 pulses/rev
System Control Single chip C-MOS microprocessor
Over Range Indicator Flashing numerals
Update Time 1 second (typical)
Batteries Included Size: 2 AA 1.5V
Life: Approx. 65 hrs
Low Voltage Indicator Flashing “LO BAT” display
Operating Temperature 32° to 113°F (0° to 45°C)
Construction Die-cast aluminum housing
Weight 0.9 lbs (400g)
Dimensions 7.3"L x 2.4"W x 1.8"H (185mm x 60mm x 45.7mm)
Warranty 1 year
STANDARD ACCESSORIES 2 cone adapters, 1 funnel adapter, 3-1/2" extension shaft,
carrying case and 1 master wheel (6" cir.)
Using the 6" master wheel and proper mode selector switch,
the following industrial units of measurement are achieved.
Range and Accuracy
Specifications
MODEL DT-105A
R: REVOLUTIONS SINGLE RANGE ACCURACY RESOLUTION
Contact RPM (rev./min.) 0.10 - 999.99 ± 0.06 0.01
1,000.0 - 9,999.9 ± 0.6 0.1
10,000 - 25,000 ±0.006% of reading ±1digit 1
(or ±2 rpm max.)
Contact RPH (rev./hour) 6 - 99,999 ±0.006% of reading ±1digit 1
(or ±6 rpm max.)
REV (total revolution) 0.1 - 9,999.9 ± 0.1 0.1
10,000 - 99,999 ± 1 1
F: FEET SINGLE RANGE ACCURACY RESOLUTION
F/M (feet/min) 0.05 - 999.99 ± 0.06 0.01
1,000.0 - 9,999.9 ± 0.6 0.1
10,000 - 12,500 ± 1 1
F/H (feet/hour) 3 - 99,999 ±0.006% of reading ±1digit 1
(or ±6 FPH max.)
FT (length) 0.01 - 999.99 0.01
1,000.0 - 9,999.9 0.1
10,000 - 99,999 1
Y: YARDS SINGLE RANGE ACCURACY RESOLUTION
Y/M (yards/min.) 0.02 - 999.99 ± 0.06 0.01
1,000.0 - 4,167.0 ± 0.3 0.1
Y/H (yards/hour) 1.0 - 9,999.9 ±0.6 0.1
10,000 - 99,999 ±0.006% of reading ±1digit 1
(or ±6 YPH max.)
YRd (length) 0.005 - 99.995 0.005
100.00 - 999.99 0.01
1,000.0 - 9,999.9 0.1
10,000 - 99,999 1
I: INCHES SINGLE RANGE ACCURACY RESOLUTION
I/M (inches/min.) 0.6 - 9,999.9 ±0.6 0.1
10,000 - 99,999 ±0.006% of reading ±1digit 1
(or ±6 IPM max.)
IN (length) 0.1 - 9,999.9 0.1
10,000 - 99,999 1
m: METERS SINGLE RANGE ACCURACY RESOLUTION
m/M (meters/min.) 0.02 - 999.99 ± 0.06 0.01
1,000.0 - 3,810.0 ± 0.3 0.1
m/H (meters/hour) 0.9 - 9,999.9 ± 0.6 0.1
10,000 - 99,999 ±0.006% of reading ±1digit 1
(or ±6 mPH max.)
m (length) 0.005 - 99.995 0.005
100.00 - 999.99 0.01
1,000.0 - 9,999.9 0.1
10,000 - 99,999 1
cm (length) 0.5 - 9,999.5 0.5
10,000 - 99,999 1
M: MILES SINGLE RANGE ACCURACY RESOLUTION
M/H (miles/hour) 0.0006 - 9.9999 ± 0.0006 0.0001
10.000 - 99.999 ± 0.006 0.001
100.00 - 142.05 ± 0.01 0.01
SHIMPO INSTRUMENTS