Shimpo Instruments DT-105A Instruction Manual

Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - TestEquipmentDepot.com

SHIMPO INSTRUMENTS

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 – measur es 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 micr oprocessor for high reliability and

low maintenance

! Rugged construction - die-cast aluminum housing

Specifications

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
ST ANDARD ACCESSORIES 2 cone adapters, 1 funnel adapter, 3-1/2" extension shaft,

carrying case and 1 master wheel (6" cir.)

Instruction Manual

Range and Accuracy

Using the 6" master wheel and proper mode selector switch,
the following industrial units of measurement are achieved.

MODEL DT-105A
R: REVOLUTIONS SINGLE RANGE ACCURACY RESOLUTION
Contact R PM (r ev./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

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).

Surface Speed Metric Conversion

Memory Recall

Conversions such as YPM to mPM or mPM to YPM may be
obtained from the memory only by switching from one mode
to another.

Operating Procedure

1. Place adapter or wheel
on shaft (as shown).

CAUTION: Do not
attach master speed
wheel on extension
shaft. The wheel may slip off during measurement.

2. Turn selector switch to desired unit.

A. AUTOMATIC MEMORY

The following are automatically stored in memory for 5 minutes
following release of the power switch:

• Last reading

• Maximum reading

• Minimum reading

These readings will be displayed in the following order when
the memory switch is pressed:

• Last reading

• Maximum reading

• Minimum reading

To fill all three memory spaces, unit must operate for about 5
seconds. If any of the above memory readings are missing,
unit must operate a few seconds longer.

B. MEMORY SELECTION

The DT-105A has the capability of storing 10 extra readings in
its memory. These readings can be obtained from the same
machine or many machines (up to 10) by pressing the memory
switch momentarily as the reading you wi s h stored ap pears on
the display. An "M" with an integer will appear on the top of
the display momentarily, and will be stored in memory. Up to
10 readings can be stored.

3. After attaching proper
adapter or wheel, bring
it into contact with
rotating object or
moving surface whose
speed is to be measured.
Apply only enough pressure to eliminate slip. The selected
function will be shown "blinking" above the display digits.

4. Press and hold the on-off switch. Display will update
approximately every second.

5. Observe speed for as long as it is desired.

6. On-off switch must be released prior to removal of tachometer
from rotating object if last reading must be captured.

7. After release of power switch, the last reading will be displayed
for approximately 5 minutes. Readings will be retained in
memory for 5 minutes and can be extended any number of
additional 5 minute periods by re-pressing the memory switch.

NOTE: All memory data will be erased if automatic shut-off
has occurred. To recall a specific reading, press the memory
switch until the desired reading shows up on the display along
with its memory position. To erase all data from the memory,
press the memory switch for at least 5 seconds until display
shows CCCCC. If you hold the memory switch, the display
will continue to show CCCCC until the switch is released, then
will default to 0.00.

Battery Replacement

Low battery voltage is
indicated by LO BAT on
the display. Remove end
cover by using a coin or
appropriate screwdriver
and replace both batteries.
Please note polarity.