Instruction Manual

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
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
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.
Model TAC-L Photo/Contact Digital Tachometer
Installation and Operating Instructions
Bulletin TE-TAC-L
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).
DWYER INSTRUMENTS, INC. Phone: [phone] www.dwyer-inst.com
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: [phone] e-mail: [e-mail]
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
In the case of measuring low RPM values with the non-contact
laser, it is suggested that the user attach more reflective marks
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.
NOTICE
Figure 1