Cojali jaltest tools JT2008 User manual

JT2008
Digital Tachometer
Operating Manual
Button Operation Performed
ON/OFF Press once to turn the meter on.
Press and hold for 1 second to turn it off.
When measuring RPM and Counts, press once to enter the Hold
mode. Press it again to exit the hold mode.
R/C When measuring RPM and Counts, press it to toggle between RPM
and Counts feature.
Press and hold for 1 minute to enter the setup feature. After that, each
time you press the button, it steps through LED / SR / AOFF / CLK /
settings, then exits the setup and accesses RPM or Count. You could
press ON/OFF button to exit the setup mode and return to normal
measurement mode at any time.
M/M/A Press this button to choose Max./Min./Average/Zeroing/Setting
options.
Under Tach measurement mode, press M/M/A button to select MAX/
MIN/AVE and normal measurements.
After entering LED/SR/AOFF/CLK mode, press this button to set to 0/ 1
and adjust the time.
Overview
International Electrical Symbols
Setup
Functional Buttons
The Meter Structure (See Figure 1)
Display Symbols (See Figure 2)
Unpacking Inspection
Safety Information
This Operating Manual covers safety information
related to the Tachometer. Please read the relevant
information carefully and observe all the Warnings
and Notes strictly.
Model JT2008 is a stable, safe and reliable digital
non-contact Tachometer. This Tachometer can
measure RPM and counts. RPM range is 10 ~ 99999
while counts range is 0 ~ 99999.
1 Tachometer Light Source.
2 LCD Display.
3 Housing
4 Functional Buttons
Open the package case and take out the Meter. Check the following items
carefully for any missing or damaged part:
The table below offers information about the functional button operations.
Press R/C button to select LED feature after turning on the Meter. Then press
M/M/A button to set to 0 or 1. 0 represents disabling LED laser and 1 enabling
the laser.
Press R/C button to select SR feature after turning on the Meter. Then press
M/M/A button to adjust between 005 ~ 255. Press and hold M/M/A button to
access quick setting.
Press R/C button to select CLK feature after turning on the Meter. Then press
M/M/A button to set to 0 or 1. 0 is for h:m time format and 1 for m:s format.
Press R/C button to select AOFF feature after turning on the Meter. Then
press M/M/A button to set to 0 or 1. 0 represents disabling auto power off and 1
enabling the function.
With the function enabled, the meter will automatically be powered off if
buttons are inactive for 10 minutes. Press ON/OFF again to turn on the meter.
This Meter complies with IEC61010-031 and IEC61326 standards as well as
Pollution Degree 2 requirement.
Use the Meter only as specied in this operating manual. Otherwise, the
protection provided by the Meter may be impaired.
In this manual, a ⚠Warning indicates conditions and actions that pose
hazards to the user, or may damage the Meter or the equipment under test.
A Note indicates the information that user should pay attention to.
In the event there is any missing or damaged item, please contact your dealer
immediately.
Before using the Meter, inspect the case. Do not use the Meter if it is
damaged or the case (or part of the case) is removed. Look for cracks or
missing plastic.
Do not use or store the Meter in an environment of high temperature,
humidity, explosive, inammable and strong magnetic eld. The
performance of the Meter may be deteriorated after being dampened.
Do not aim the laser directly at eye.
Replace the battery as soon as the battery indicator appears.
When the battery is between 4.5V ~4.8V, the battery indicator will appear.
When the battery is between 4.3V ~ 4.5V, the battery indicator will blink,
the Meter will be turned off after 1 minute.
When opening the battery door, make sure the Meter is powered off.
When servicing the Meter, use only the replacement parts with the same
model or identical electrical specications.
The internal circuit of the Meter shall not be altered at will to avoid damage
of the Meter and any accident.
Soft cloth and mild detergent should be used to clean the surface of the
Meter when servicing. No abrasive and solvent should be used to prevent
the surface of the Meter from corrosion, damage and accident.
Turn the Meter off when it is not in use and take out the battery when it is
not in use for a long time.
Constantly check the battery as it may leak when it has been using for
some time, replace the battery as soon as leak occurs. A leaking battery will
damage the Meter.
⚠Warning:
Item Description Qty
1 English Operating Manual 1 piece
2Reecting Tape 10 pieces
3 1.5V Battery (LR6) 4 pieces
Warning. Refer to the Operating Manual
Low Battery Indication
Conforms to Standards of European Union
Number Meaning
1 Unit of Tachometer
2 Unit of Counts
3Time
4 The battery is low
5 Indicator of Sleep Mode
6 Measurement of RPM and Counts
7 Data Hold is on
8 Display of Maximum reading
9 Display of Minimum reading
10 Display of Average reading
11 Display of Measurement reading
1
2
3
4
Figure 1
Figure 2
A. LED
B. SR (Sampling Rate)
D. CLK
C. AOFF
1
2
3
4
5
6
7
8
910
11

JT2008
Digital Tachometer
Operating Manual
Measurement Operation
Specications
MAINTENANCE
Accuracy Specications
The Time will be off after the HOLD feature is enabled. The time will be
activated again after coming out the HOLD mode.
Do not aim the laser directly at eyes.
To avoid the rotating object from touching the meter and cause any injury
or damage to the meter during the measurement, please keep the meter
more than 50mm away from the tested target.
Display: 5 digits LCD display. Maximum display: 99999.
Overloading: Display OL.
Low Battery Indication: Display .
Sampling Rate: Adjustable from 5ms~255ms.
Sensor Type: Photo diode and laser tube.
Measurement Distance: 50mm ~ 200mm.
Drop Test: one meter.
Power: 4pcs x 1.5V batteries (AA).
Dimensions: 184 x 56 x 34mm.
Weight: Approximate 100g (excluding battery)
For indoor use only.
Altitude: 2000m
Temperature and humidity:
Operating:
0ºC~30ºC(≤85% R.H.)
30ºC~40ºC(≤75% R.H.)
40ºC~50ºC(≤45% R.H.)
Storage:
-20ºC~60ºC(≤85% R.H.)
Safety/ Compliances: IEC61010-031, IEC61326, IEC61010-1 pollution degree 2.
Certication:
To carry out RPM measurement, follow
the following procedure:
This section provides basic maintenance information including battery
replacement instruction.
This operating manual is subject to change without notice.
Accuracy: ±(a% reading + b digits), calibration per year.
Operating temperature: 23ºC ± 5ºC
Operating humidity: ≤80% R.H.
Temperature Coefcient: 0.1 x (accuracy)/ ºC
Self-lighted Counts (See Figure 4)
Receiving Light Source Outside (See Figure 5)
⚠Warning:
⚠Warning:
Note:
Note:
Note:
A. RPM Measurement (see Figure 3)
A. General Specications
B. Environmental Requirements
A. RPM
A. RPM
A. General Service
B. Replacing the Battery (See Figure 6)
B. Counts
Figure 3
Figure 5
Figure 6
Figure 4
Attach a piece of reecting tape to the
object under test.
Position the meter rmly on desired
location. Hold the meter and keep its light
source 50~200mm away from the object
under test.
Press ON/OFF button, the Meter is default to
enter the RPM measurement mode. Point
the Tachometer light source to reective
tape, The deviation from the ideal right-
angle should not be greater than 30.
The LCD displays the RPM reading
Press ON/OFF to turn the Meter off.
Turn the Meter’s front case down.
Remove the screw from the battery door,
and separate the battery door from the case
bottom.
Take out the old batteries and replace with 4 x
1.5V battery (AA).
Insert again the case bottom to the battery
door, and reinstall the screw.
Position the meter rmly on desired location.
Hold the meter and keep its light source
50~200mm away from the targets.
Press the ON/OFF button.
Press the R/C button to select Count mode.
Point he Tachometer light source to the objects
under count. The deviation from the ideal right-
angle should not be greater than 30.
The LED scans the objects under count, counts
the number and displays the total value.
Position the meter rmly on desired location. Hold
the meter and keep its light source 50~200mm
away from the targets. The deviation from the
ideal right-angle pointing should not be greater
than 30.
Locate the Meter, objects under counts and light
source as shown in Figure 5.
Press ON/OFF button.
Turn the LED off, refer to page 9 point B.
Then press R/C button to select Counts mode.
When the objects under count pass between
the meter and light source, the meter counts the
number and displays the total value.
When measuring RPM, the LCD displays “0.0000” if there is no signal
within 7 seconds.
When the RPM is greater than “99999” the LCD displays OL.
The object under count must be reective.
Otherwise Counts feature cannot be used.
Under the count mode, when the count number
is greater than “99999”, the Meter will display OL
and hold the data.
Press M/M/A button to zero the counts.
Press ON/OFF to re-start counting.
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Range Resolution Accuracy
10~99.999 r/min 0.001 r/min
100~999.99 r/min 0.01 r/min
1000~9999.9 r/min 0.1 r/min
10000~99999 r/min 1 r/min
± (0.04%+2)
Range Resolution Max. Input Frequency
0~99.999 1 digit 10kHz, Pulse Width 5%
Periodically wipe the case with a damp cloth and mild detergent. Do not
use abrasives or solvents.
Turn the Meter off when it is not in use.
Take out the battery when it is not in use for a long time.
Do not use or store the Meter in a place of humidity, high temperature,
explosive, inammable and strong magnetic eld.
⚠Warning:
Do not attempt to repair or service your Meter unless you are qualied
to do so and have the relevant calibration, performance test, and service
information.
Do not attempt to open the back housing to avoid damaging the Meter or
affecting the accuracy.