DT-200LR Handheld Digital Laser Tachometer
Operation Manual
• When using the 6” wheel, do not use the extension shaft - the wheel
may fly off the shaft and cause damage.
• Although the tachometer alone is able to achieve the higher
ranges listed in the Range and Accuracy table on page 3, the wheel
attachment has a maximum speed limitation of 5,000 FPM (for safety
reasons).
• Laser radiation may be harmful to the human eye. Avoid direct
exposure of human eyes to laser light. Eye damage can result.
• Never point the unit at another person.
• Keep out of the reach of children.
• Avoid indirect exposure via reflective materials such as glass and
mirrors.
When power button is depressed,
laser is active.
DT-207LR
LED Display
DT-205LR
LCD Display
Series DT-200LR Combination Contact/Non-Contact Laser Tachometers Laser-enabled precise RPM measurement up to 20
feet. The Series DT-200LR digital tachometers incorporate laser
technology yet retain our hallmark rugged construction and reliable quality components. Units offer incredible value and versatility as they can operate in non-contact and contact applications.
These instruments feature a field-upgradeable contact adapter for
linear rate measure, conveniently allowing both non-contact and
contact measurements.
All Series 200LR units come standard with a NIST traceable calibration certificate. We’re confident you’ll agree that these fine units
are the most advanced handheld tachometers on the market!
SPECIFICATIONS
Display Range: 6 - 99,999 rpm
Accuracy: ±1 rpm: 6 -8,300 rpm; ±2 rpm: 8,300 - 25,000 rpm;
±0.006% of reading ±1 digit (±6 rpm max.) 25,000 - 99,999 rpm
Display: 5 digit 0.4” (10 mm) high LED
Measuring Units: rpm (on contact using adapter, included) for
YPM, mPM, FPM, IPM, and Length: YRD, m, FT and IN; Use wheel
with 200L adapter
Measuring Distance: 1” (25.4mm) to 20’ (6m)
Memory System: 13 readings are stored in memory and retained
for 5 minutes (last, max., min., and 10 extra measurements)
Detection: Laser diode / contact
Update Time: 1 second (typical)
Power Requirement: 2 AA 1.5V batteries (Life: Approx. 25 hrs)
Operating Temperature: 32º - 113ºF (0º - 45ºC)
Construction: Die-cast aluminum housing
Product Weight: 0.8 lb (365 g)
Package Weight: Approx. 2 lb (.91 kg)
Approvals: CE
Dimensions: 6.6” L x 2.4” W x 1.8”H (167.5 mm x 60 mm x 46
mm); with contact adapter: Length=8.25” (209 mm)
Warranty: 2-Year
Included Accessories: Reflective tape, 2 cone adapters, funnel
adapter, 3½” extension shaft, carrying case, NIST certificate, master wheel (6” cir.) & contact adapter
CONTROL PANEL
OPERATION
Non-Contact Measurement
1. Place a small piece of reflective tape
(included) on the shaft or moving element
(disc, pulley, etc.) whose speed is to be
measured. If the element’s surface is highly
reflective it may need to be painted a darker color in order to ensure reliable results.
If the distance to the object is less than 5”
(127 mm), reflective tabs (optional) should
be used instead of reflective tape.
2. Aim the tachometer at the reflective tape from a distance of 5”
(127 mm) to 20’ (6.m).
3. Press and hold the power switch for several seconds (when
power button is depressed, laser is active) to observe the display
as it changes according to the speed of the shaft or rotating element (as soon as the laser hits the reflective tape, the unit will start
to indicate the speed). If the beam is “on target” the RPM indicator
will be flashing.
4. After observation is completed, retain the reading by releasing
the power switch (to turn off laser) before removing the tachometer from its position. The last reading is displayed for a period of 5
minutes and can be extended any number of additional 5 minute
increments by pressing the memory switch.
NOTE: When switching from the contact to the non-contact mode,
the unit RPM will show on the display and also 5 dashes (-----).
Press the power switch to cancel the dashes.
Contact Measurement
For both RPM measurements and non-RPM measurements,
screw the DT-ADP-200LR Adapter (included) into the front of the
tachometer.
NOTE: Hand tightening is sufficient; do not use excessive torque
when mounting DT-ADP-200LR Adapter
RPM Measurement
1. Place rubber cone tip on the shaft of the
DT-ADP-200LR adapter. Make certain that the
pin on the shaft is properly aligned with the
slot on the cone’s sleeve.
2. Bring cone into contact with the shaft. Apply only enough pressure to avoid slippage.
3. Press and hold the power switch. During engagement the display will reflect the proper RPM while the unit RPM will be flashing
above the display digits.
4. Release the power switch prior to removal of tachometer from
rotating object to capture the last reading.
5. After release of the power switch, the last reading (with a
non-flashing RPM unit) will remain on the display and in memory
for 5 minutes, and can be extended any number of additional 5
minute periods by pressing the memory switch.
Rate & Length Measurement
1. Attach the master wheel and select the desired function using the selector switch located just below the LCD display (see above).
2. Press and hold the power switch; while the
wheel is turning and the tachometer is measuring the selected function, the function will
be indicated, and the unit of measure function will be flashing.
3. Release the power switch before disengaging the tachometer
in order to capture the last reading.
4. After release of the power switch, the last, maximum, and minimum readings will be stored in memory for 5 minutes and can be
extended any number of additional 5 minute periods by pressing
the memory button.
NOTE: The memory will clear in 5 minutes after the release of the
power switch.
For steps 1-4 described above, it was assumed that the selector
switch was in the rate mode region. If the selector switch is moved
from the rate mode to the count mode (length), the display will
show the selected function (m, ft, yd, or in) and also 5 dashes (----
-). Press the power switch to cancel the dashes and start measuring the same way as was described above. Once in the counting
mode, the measurement can be stopped at any time and the last
reading will be retained for 5 minutes. There is no maximum or
minimum reading when in the count (length) mode.
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