Dwyer TAC-L User Manual
Model TAC-L Photo/Contact Digital Tachometer
m/min
rpm
rpm
MEM
c
ontact
contact
p
hoto
D
IGITAL TACHOMETER
T
AC-L
A
B
C
D
E
F
G
H
m
/min
r
pm
r
pm
MEM
c
ontact
c
ontact
p
hoto
DIGITAL TACHOMETER
TAC-L
7
-3/8
[
187.91]
2-7/8
[73.89]
6
-1/4
[
159.96]
1
-3/8
[
34.05]
R
PM ADAPTER FITTING
(
ATTACHED TO UNIT)
CYLINDRICAL CONTACT
ROTATIONAL FITTING
SMALL POINTED CONTACT
ROTATIONAL FITTING
L
ARGE POINTED CONTACT
R
OTATIONAL FITTINGS
(
ATTACHED TO UNIT)
SURFACE SPEED
RING ATTACHMENT
Installation and Operating Instructions
Bulletin TE-TAC-L
Model TAC-L Portable Digital Tachometer measures rotational speed
either by contacting a rotatable head to the shaft of the object, or using
photo sensor to detect the reflections from the laser. The laser target can
record from a distance of up to 20 inches and gives a more accurate
measurement than LED targeting. Model TAC-L includes a large LCD
with a backlight for use in dark areas. This tachometer is made of a
strong, lightweight ABS plastic housing, which is designed to comfortably
fit in the hand of the user. Supplied with this model are 3 contact rotational
heads, a contact surface wheel, and a protective carrying case.
PRODUCT OVERVIEW
Figure 1
A. Surface speed wheel B. Contact test device
C. Contact measuring device D. Measuring button
E. Function switch F. Memory button
G. Display H. Battery cover
SPECIFICATIONS:
Accuracy: ±(0.05% + 1 digit).
Display: Backlit LCD; 5 digits, 7 segments, 0.7˝ (1.8 cm) H.
Range:
Non-contact (RPM): 2.5 to 99,999 RPM;
Contact (RPM): 0.5 to 19,999 RPM;
Surface Speed (m/min): 0.05 to 1999.9 m/min.
Resolution:
Non-contact (RPM): 0.1 RPM (2.5 to 999.9 RPM),
1 RPM (1000 to 99,999 RPM);
Contact (RPM): 0.1 RPM (0.5 to 999.9 RPM),
1 RPM (1000 to 19,999 RPM);
Surface Speed (m/min): 0.01 m/min (0.05 to 99.99 m/min),
0.1 m/min (100.0 to 1999.9 m/min).
Non-contact Measuring Distance Range: 2 to 20˝ (5 to 50 cm).
Sampling Time: 0.8 s.
Temperature Limits: 32 to 122°F (0 to 50°C).
Power Requirements: (4) 1.5 V AA alkaline batteries, included, user
replaceable.
Weight: 1.37 lb (.620 kg).
NON-CONTACT MEASURING (RPM)
1. Apply a reflective mark to the object being measured.
2. Slide the function switch to “rpm photo” and remove the cap.
3. Depress the measuring button and align the visible light beam with the
applied target. Verify that the monitor indicator lights when the target
aligns with the beam.
NOTICE
an average distance apart on the object, then measure as above, giving a more
accurate measurement. The user then must divide the reading shown by the number
of reflective marks to find the true RPM.
DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: 219/872-9057 e-mail: info@dwyer-inst.com
In the case of measuring low RPM values with the non-contact
laser, it is suggested that the user attach more reflective marks
Phone: 219/879-8000 www.dwyer-inst.com
CONTACT MEASURING (RPM)
1. Install the contact device, with the head piece that works best for the
object being measured.
OTICE
peed.
s
N
The large tapered and pillar rubber pieces are more suitable for
low speed. The small tapered piece is more suitable for high
2. Slide the function switch to “rpm contact.”
3. Lightly press the rpm adapter against the center hole of the rotating
shaft.
4. Depress the measuring button, being sure to keep the alignment
straight.
5. Release the measuring button when the display reading stabilizes.
The third time the button is pressed, the last recorded value is shown,
alternated with “LA.” See Fig. 4.
Figure 4
SURFACE SPEED MEASURING (M/MIN)
1. Install the surface speed ring attachment.
2. Slide the function switch “m/min contact.”
3. Lightly press the speed ring to the object being measured.
4. Depress the measuring button, being sure to keep the alignment
straight.
5. Release the measuring button when the display reading stabilizes.
MEMORY
The memory button is able to recall the records from the last time the
measuring button was pressed. Press and hold the memory button each
time. The first time the button is pressed, the maximum recorded value is
shown, alternated with “UP.” See Fig. 2.
OTICE
N
Recorded data is reset every time the measuring button is
ressed.
p
Figure 2
The second time the button is pressed, the minimum recorded value is
shown, alternated with “DN.” See Fig. 3.
The fourth time the button is pressed, there will be a countdown from 20
to 1. After this, the display will show “An **.” The number that is displayed
after “An” is the number of seconds that the tachometer was recording for
during the last session. In the case of Figure 5, the tachometer recorded
for 64 seconds.
Figure 5
Each time the button is pressed after that, it will show the recorded value
for each second it was recording. After having gone through all of the
values, pressing the button will start from the beginning with the
maximum measurement.
REPLACING THE BATTERIES
When the batteries need to be replaced, the battery icon will appear in the
bottom left corner of the display. To replace the batteries, slide the battery
cover off of the tachometer and remove the 4 batteries. Install the new
batteries in the same position as the previous ones.
MAINTENANCE/REPAIR
Upon final installation of the Model TAC-L, no routine maintenance is
required besides changing the batteries. The Model TAC-L is not field
serviceable and should be returned if repair is needed. Field repair
should not be attempted and may void warranty.
WARRANTY/RETURN
Refer to “Terms and Conditions of Sale” in our catalog and on our
Figure 3
website. Contact customer service to receive a Return Goods
Authorization number before shipping the product back for repair. Be
sure to include a brief description of the problem plus any additional
application notes.
©Copyright 2013 Dwyer Instruments, Inc. Printed in U.S.A. 12/13 FR# R6-444140-00
DWYER INSTRUMENTS, INC.
Phone: 219/879-8000 www.dwyer-inst.com
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: 219/872-9057 e-mail: info@dwyer-inst.com
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