Tenmars TM-102 User manual
DIGITAL CLAMP METER
TM-102
User’s manual
HB2TM1020010
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CONTENTS
1. General Description & Specifications............ 1
2. Name and Funtions ....................................... 3
3. Calibration Procedures.................................. 6
4. Measurement Preparation............................. 7
5. Operating precautions................................... 7
6. Measurement................................................. 8
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TM-102
EN-1
Thank you for using our Sound Level Meter.
To ensure that you can get the most from it, we
recommend that you read and follow the manual
carefully before use.
This unit conforms to the IEC651 Type2, ANSI S1.4
Type2 for Sound Level Meters.
This Sound Level Meter has been designed to meet the
measurement requirements of safety Engineers, Health,
Industrial safety offices and quality control in various
environments.
Ranges from 30dB to 130dB at frequencies between
31.5HZand 8 KHZ .
Display with 0.1dB steps on a 4 digits LCD.
With two equivalent weighted sound pressure levels,
A and C.
1. GENERAL DESCRIPTION &
SPECIFICATIONS
a. Display：4 digits LCD with maximum/minimum,
Resolution：0.1dB, Display Update：0.5 sec.
b. Standard applied：IEC651 Type2, ANSI1.4 Type2.
c. Frequency range：31.5Hz~8KHz.
d. Measuring level range：A Weighting 30 ~130dB.
C Weighting 35~130dB.
e. Frequency weighting：A/C.
f. Microphone：1/2 inch Electret condenser
microphone.
g. Time weighting：FAST(125mS),SLOW(1 sec).
h. Level ranges：30 ~130dB(Auto Range).
i. Accuracy：±1.5dB.
j. Dynamic range：50dB.
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TM-102
EN-2
k. MAX/MIN：Hold readings for the Maximum and
Minimum value.
l. DATA HOLD：The reading data shown on LCD can
be locked while pressing the button
m. Low Battery Indication: Replace battery as LCD
display “ ”.
n. Power Supply：9V NEDA 1604，IEC 6F22,JIS
006P battery×1pcs.
o. Power Life : About 50 hrs (alkaline Battery).
p. Operation height：2000M under the elevation
above sea level.
q. Operation temperature＆Humidity：5℃~40℃,
below 80﹪RH。
r. Storage Temperature＆Humidity：-10℃~60℃,
below 70﹪RH。
s. Dimension: 200mm(L)x55mm(W)x38mm(H).
t. Weight: About 170g. (Including batteries)
u. Accessories: User’s manual、carrying case 、9V
Battery, windscreen.
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TM-102
EN-3
1. Windscreen
2. Display
3. DATA HOLD button
4. Frequency weighting
select button
5. Time weighting select
button
6. Maximum/Minimum
hold button
7. Backlight button
8. Power button
9. Microphone
10. Battery Cover
2. NAME AND FUNTIONS
1. Windscreen
If you operate at wind speed over 10m/sec, please
put protective accessories-windscreen in front of
the microphone.
4
7
1
2
5 6
8
9
10
3
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TM-102
EN-4
a.Low battery indication
b.DATA HOLD
indication
c.Maximum indication
d.Minimum indication
e.A-Weighting
f. C-Weighting
g.Slow response
h.Fast response
i. Sound level read out
2. Display
3. Power button.
The key for 1sec to turn the sound level meter ON
or OFF. The auto power will be off automatically
after 5 minutes idle time
4. MAX/MIN hold button
4.1 Press it to select the maximum, minimum or
current reading. Press for more 1 second to
return normal measurement.
4.2 The MAX/MIN function will be disable if:
The MAX/MIN is pressed for more than 1 second.
Turn off the meter.
5 Frequency Weighting select button.
A：A-Weighting. For general sound level
measurements. C：C-Weighting. For checking
the low-frequency content of noise.(If the C-
Weighted level is much higher than the A-
weighted level, then there is a large amount of
low-frequency noise)
6 Time weighting select button.
FAST：for normal measurements.
a
b c d e
f
h g
i
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TM-102
EN-5
SLOW：for checking average level of fluctuation
noise.
7 HOLD button.
The reading data shown on LCD can be locked
while pressing the button.
8 Backlight button.
Press the button you enable the display backlight
to easy readings in dark environments. Press
more than 1 second to disable backlight, which
however it automatically OFF after 15 seconds.
9 Microphone
1/2 inch Electret Condenser microphone.
10 Battery cover
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TM-102
EN-6
3. CALIBRATION PROCEDURES
Using a standard Acoustic Calibrator(94dB,1KHz Sine
wave)
1. Make the button settings. Display：dBA
Time weighting：FAST
2. Insert the Microphone nozzle carefully into the
insertion hole of the calibrator.
3. Press A/C button then press the HOLD button, hold
the 2 buttons at the same time more than 1 second.
LCD will be blinking to confirm calibration.
4. When LCD blinked, release the A/C and the HOLD
buttons. The sound level meter will display 94.0
dBA . The calibration is done.
Acoustic calibrator
Sound level meter
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TM-102
EN-7
5. The 94 dB calibration process can be repeated until the
meter reads 94.0 dB. Recalibration cycle：1 year.
4. MEASUREMENT PREPARATION
1. Battery Loading
Remove the battery cover on the back and put in
one 9V Battery.
2. Battery Replacement When the battery voltage
drops below the operating voltage, the mark
appears. If it appears, battery should be replaced
with new one.
5. OPERATING PRECAUTIONS
1. Wind blowing across the microphone would bring
additional extraneous noise. Once using the
instrument in the presence of wind, it is necessary
to mount the windscreen preventing to pick up
undesirable signals.
2. Calibrate the instrument before operation if the
instrument was not in use for a long time or
operation at bad environment.
3. Do not store or operate the instrument at high
temperature and high humidity environment.
4. Keep microphone dry and avoid severe vibration.
5. Please take out the battery and keep the instrument
in low humidity environment. When it is not in use.
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TM-102
EN-8
6. MEASUREMENT
1. Open battery cover and install a 9 Volt battery in
battery compartment.
2. Turn on power and select the desired response
time and weighting. If the sound source consists of
short bursts or only catching sound peak, set
response to FAST. To measure average sound
level, use the slow setting. Select A weighting for
general noise sound level and C weighting for
measuring sound level of acoustic material.
3. When MAX/ MIN (maximum, minimum hold) mode
is chosen. The instrument captures and holds the
maximum or minimum noise level . Press once to
select MAX value. Press again to select MIN value,
Press again to exit the MAX/MIN mode. “MAX” or ”
MIN” symbol disappears.
4. Turn off the instrument and remove the battery
when it is not in use.
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