1.0 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 02
1.1 Applications
2.0 SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . 03
3.0 CONTENTS OF COMPLETE OUTFIT . . . . . . . . . . 04
4.0 OVERVIEW OF CDT-2000 . . . . . . . . . . . . . . . . . . . . . 05
4.1 LCD Display
4.2 Front Panel Keys
5.0 INSTALLING BATTERIES . . . . . . . . . . . . . . . . . . . .
07
6.0 MEASURING RPM . . . . . . . . . . . . . . . . . . . . . . . . . . . 08
6.1 Contact Operation
6.2 Non-Contact Operation . . . . . . . . . . . . . . . . . . . . . .
7.0 MEASURING SURFACE SPEED OR LENGTH . . . . 10
8.0 MEMORY SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . 11
9.0 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
1
Table of Contents
OI611
9.0 SPECIFICATIONS
12
Measuring Ranges
RPM 1.00 – 99,999 rpm (non-contact)
1.00 – 19,999 rpm (contact)
Surface Speed 0.30 – 6,500 feet/min
0.10 – 1,999 meters/min
4.0 – 78,000 inches/min
Length 0.01 – 99,999 feet
0.02 – 99,999 meters
1.0 – 99,999 inches
Resolution .01 from 0 –100
.1 from 100 – 1,000
1 from 1000 – 99,999
Accuracy ± 0.02% of reading or 1 digit
Display 5-Digit LCD, 10mm high
Decimal Point Automatic
Memory System Maximum, minimum, and last reading (retained in memory for the
life of batteries)
Measurement System
Non-Contact Visible LED light beam
Contact Contact adapter
Engineering units
RPM RPM
Surface Speed Feet/min, inches/min and meters/min
Length Feet, inches, meters
Sensing Distance Up to 14 inches (350mm)
Display Update Time 0.5 seconds or one measuring period
Auto Power Off After 30 seconds of non-use (minimum, maximum and last reading
retained in memory)
Battery Life 20 hours continuous use
Weight 6 ounces (170 grams)
Housing Material ABS Plastic
Operating Temperature 32 to 122° F (0 to 50° C)
Storage Temperature – 4 to 150° F (–20 to 70° C)
Accessories Included Contact adapter, cone tip, universal surface speed wheel with
integrated funnel tip adapter, reflective tape, operating
instructions and foam-fitted, hard-plastic carrying case
Optional Accessories Shaft extension, 3.15 inches (80 mm)
Warranty 2 years
1.0 INTRODUCTION
The CDT-2000 Digital Tachometer combines the best features of contact
and non-contact tachometers for measuring rotational speed, surface speed
and length.
When used in the non-contact operating mode, a small piece of reflective
tape is applied to the rotating element (wheel, shaft, etc.). The CDT-2000
uses a visible LED light source to accurately measure the RPM from up to
14” (350 mm) away from the “target”. In the contact operating mode, the
speed is sensed using one of the contact adapters supplied with the instrument.
In applications where surface speed or linear speeds are to be measured,
the universal wheel is used for direct readout of feet/min, meters/min or
inches/min, as selected by the user. The CDT-2000 can also be used to
measure the accumulated total of continuously running material such as
paper, wire/yarn being wound on a spool, or for checking the calibration
of on-line counters and totalizer devices.
1.1 Applications
2
Contact RPM — Used to measure the speed of rotating
motors, shafts, pulleys, gears, etc.
Non-Contact RPM — Used when contact measurement
is not possible due to access space restrictions, safety
concerns, etc.
Linear Speed and Length — Used to measure the
linear speed or length of moving surfaces, such as
conveyor belts, printed materials, webs of fabric
or paper, etc.
8.0 MEMORY SYSTEM
The CDT-2000 is supplied with a built-in memory
system which stores the last measurement,
the maximum measurement and the minimum
measurement which occurred during a measuring
period. A measuring period is the interval of time
while the Measure key is depressed. The stored
values are retained in memory even when the
power turns off (auto power off). To recall the
stored values after auto power off:
1. Press the Measure key to turn the power on
2. Press the MEM key to recall the desired value
The Memory key accesses the CDT-2000’s built-in memory.
Each time the MEM key is pressed the values stored in
memory will be recalled to the display in the sequence listed below. The
appropriate memory indicator will be shown together with the recalled
value on the display.
Note: When the batteries are removed, the values stored in memory will
be lost.
11
8.8.8.8.8
max min mem
rpm
m/min
ft/min
in/min
mem
mem
max
mem
min
mem
max
mem
min
mem
MEM
MAX
MIN
LAST
MEM
min
rpm
max
mem
t
2.0 SAFETY PRECAUTIONS
ALL OPERATORS SHOULD WEAR SAFETY GOGGLES WHEN
USING THIS OR ANY OTHER TACHOMETER. FAILURE TO DO SO
COULD RESULT IN SERIOUS INJURY!
1. Check condition of housing, slide-on Contact Adapter and split
mounting hubs of push-in Contact Cone, Surface Speed Wheel and
any other accessories. Replace those that are worn, loose-fitting or
cracked. The Contact Adapter shaft should rotate freely.
2. When operating in the contact mode, be sure Contact Adapter fits
snugly into the housing grooves.
3. When using the Surface Speed Wheel accessory, make sure it fits the
tachometer shaft snugly. In operation, keep the wheel perpendicular
and parallel to the moving surface to prevent it from running off the
tachometer shaft.
4. Do not use the standard surface speed wheel for speeds in excess of
1000 feet per minute. For higher speeds, specify the optional HeavyDuty Surface Speed Wheel with set-screw mounting.
5. Store the instrument in its carrying case when it is not in use.
3
7.0 MEASURING SURFACE SPEED OR LENGTH
1. Install the Slide-on Contact Adapter.
2. Slide the Surface Speed Wheel over the
shaft of the instrument. Be sure to align
the pin on the side of the shaft with the slot
in the adapter. Push on securely.
4. Select the desired units of measure for
surface speed or length by pressing the
MODE key until the appropriate symbol
is shown on the LCD Display.
Surface Speed Length
feet/min feet
meters/min meters
inches/min inches
5. Position the wheel carefully so that it is
perpendicular to the moving surface. Apply
enough pressure to eliminate any slip.
6. Press and hold
the Measure key to take measurements.
7. Release the Measure key prior to removing the instrument from the
moving surface. The Last reading will be retained on the display.
10
MO
D
E
M
EM
max m
in
m
em
rp
m
m
/min
ft/m
in
in/m
in
8.8.8.8.8
PIN
SLOT
8.8.8.8,8
max min mem
rpm
m/min
ft/min
in/min
m/min
m
ft
in
ft/min
in/min
3.0 CONTENTS OF COMPLETE OUTFIT
The CDT-2000 is supplied with the following accessories in a foam-fitted,
carrying case:
1. Slide-on Contact Adapter
2. Cone Tip Measuring Adapter
3. Surface Speed Wheel with integrated Funnel Tip
4. Reflective Tape
5. Two (2) AA Batteries
4
1
2
3
4
5
6.2 Non-Contact Operation - RPM
1. Remove the Contact Adapter.
2. Attach a piece of reflective tape to the
rotating element (shaft, pulley, etc.).
3. Aim the CDT-2000 at the target using the red
visible light beam for alignment assistance.
4. Press and hold the Measure key to begin taking measurements. The
“On-Target” indicator will be displayed on the LCD if the instrument
is properly aimed at the target (reflective tape).
5. Release the Measure key prior to removing the instrument from the
target. The last reading will be retained on the LCD display.
Hints for Non-Contact Measurements
1. The non-reflective area should be larger than the reflective area.
2. If the rotating element is highly reflective, cover it with black tape or
paint to improve the contrast between the reflective tape and the
surface of the rotating element.
9
MODE
M
EM
max min mem
rpm
m/m
in
ft/m
in
in/m
in
8.8.8.8.8
Reflective Tape
4.0 Overview of CDT-2000
5
4.1 LCD Display
Low Battery Indicator
Units of Measure Indicators
Each time the MODE key is pressed the units will change.
On-Target Indicator
Memory Indicators
8.8.8.8.8
m
ax
m
in mem
rpm
m/m
in
ft/m
in
in/m
in
MEM
MODE
➊
➍
MEM
➌
MODE
rpm rpm
m/min m
ft/min ft
in/min in
➋
max min mem
1
2
3
4
6.0 MEASURING RPM
6.1 Contact Operation - RPM
1. Install the Slide-on Contact Adapter.
2. Select either the Cone Tip Adapter or the Funnel Tip Adapter for
contact with the rotating shaft.
Note: The Funnel Tip is part of the Surface Speed Wheel.
3. Slide the selected adapter over the shaft
of the instrument. Be sure to align the
pin on the side of the shaft with the slot
in the adapter. Push on securely.
4. Select the Contact RPM mode by pressing the
key until the following symbol is shown on the LCD Display.
5. Position the adapter carefully so that it contacts the center of the
rotating shaft. Apply enough pressure to eliminate any slip.
6. Press and hold
the Measure key to take measurements.
7. Release the Measure key prior to removing the instrument from the
rotating element. The Last reading will be retained on the display.
8
M
ODE
MEM
max m
in
m
em
rp
m
m/m
in
ft/m
in
in
/min
8.8.8.8.8
SLOT
PIN
RPM
MODE
4.2 Front Panel Keys
The Memory key accesses the memory. Each time the
key is pressed the values stored in memory will be
recalled to the display in the following sequence:
Changes the units of measure. Each time the key is
pressed, the units will change in the following
sequence:
The Measure key performs the following functions:
1. Turns on the power
2. Starts & stops the measuring period
3. Exits from the memory mode
6
MEM
MODE
MEM
MODE
Measure Key
LAST MAX MIN
8.8.8.8.8
max min mem
rpm
m/min
ft/min
in/min
m/min
m
ft
in
ft/min
in/min
MODE
RPM (Non-Contact)
RPM (Contact)
METERS/MIN
FEET/MIN
INCHES /MIN
INCHES
FEET
METERS
M
E
A
S
U
R
E
5.0 INSTALLING BATTERIES
1. Open the battery compartment by
pulling down on the tab located at
the top of the battery cover.
2. Remove the battery cover.
3. Insert two (2) AA batteries making
sure that the polarity of the two
batteries matches the illustration
engraved on the inside of the battery
compartment.
4. Replace the battery cover by
inserting the two tabs located on
the bottom edge of the cover into
the matching slots in the housing.
5. Push the cover closed until the tab
at the top of the battery cover “clicks”
into a locked position.
7
click
CHECK•LINE
®
BY ELECTROMATIC
CDT-2000
Digital Tachometer
Operating Instructions
ELECTROMATIC
E Q U I P M E N T C O., I N C.
600 Oakland Ave., Cedarhurst, NY 11516–U.S.A.
TEL: 516-295-4300 • FAX: 516-295-4399
CHECK•LINE
®
INSTRUMENTS
Operating
Manual
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