Nidec DT-361 User manual

Instruction manual
High Intensity LED Stroboscope Digital Tachometer
DT-361/365
Be sure to read before use.
Before use, please carefully read these safety precautions as well as instructions,
and follow them for proper use.
98585D
99 Washington Street
Melrose, MA 02176
Phone [phone]
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com

2
Safety Requirements Be sure to observe
Before operation, maintenance and inspection, please carefully read this instruction manual and
follow it for proper use. Please carefully read all information related to this unit's safety precautions
before use.
This instruction manual provides two grades of safety warnings: Danger and Caution.
Each of them is an important description related to safety. Be sure to follow them.
DANGER This indicates the possibility of re, severe injury and even death if a user disregards the instruction
and operates the unit improperly.
CAUTION
This indicates a potential situation that could produce a minor injury or damage to material if it is
improperly handled.
However, depending on the circumstances, there could be a possibility that it may cause more
serious results. Be sure to follow them.
Protection categories are explained and separated by the following symbols
Not allowed -prohibited
Mandatory Must follow
DANGER
Do not use this product in an atmosphere
with risk of re and/or explosion.
Failure to follow this could result in re.
Do not look directly at the light emitting
section.
Failure to follow this could result in injury to the eyes.
CAUTION
Do not apply strong impact to the unit, or
drop it.
Failure to follow this could result in abnormal
operation.
Do not use and/or store the unit in the
following places.
•Where water may come in contact
•Where direct sunlight come in contact
•Where high humidity environment may be present
•Where dust, dirt, salt, and/or iron may be present
•Where oil, water, and/or chemicals come in contact
•Where a re or explosion may exist or occur.
Never disassemble, repair, and remodel
the unit.
Failure to follow this could result in injury due to
abnormal operation.
Use the unit within the proper operating
temperature range (32 - 104° F).
Failure to follow this could result in malfunction.
Do not use any volatile chemicals, such as benzene,
thinner, or alcohol.Wipe clean the unit with a soft dry
cloth if it gets dirty. Or immerse a cloth in water
diluted neutral detergent, wring it, and wipe clean the
unit with it.
Since continuously emitting light for long time
causes the unit's housing to be very hot, x
the LED strobe using a tripod, etc. and use the
unit (avoid direct skin contact with the unit,
such as holding it by hand).
Failure to follow this could result in mild burns.

3
- Contents -
1 Overview 4
2 Before use 4
2.1 Checking the contents 4
2.2 Peel off the protection sheet 5
2.3 Charging (only for DT-365) 5
2.3.1 Charging method 5
2.3.2 Indication of low battery voltage 6
2.3.3 Battery replacement 6
3 Part names and functions 7
3.1 Main unit 7
3.2 Operation section 7
3.3 Display 8
3.3.1 Part names 8
3.3.2 Number display 8
3.3.3 Unit display 8
3.3.4 Emission setting display 8
3.3.5 Mode display 8
3.3.6 Memory number display 8
3.3.7 Charging lamp (only for DT-365) 8
4 Functions and operations 9
4.1 Power ON/OFF 9
4.2 Emission setting 10
4.3 Internal oscillation emission 11
4.3.1 Display of internal oscillation emission 11
4.3.2 Switching the modes 11
4.3.3 Switching the unit display 11
4.3.4 Emission count mode 12
4.3.4.1 Emission count setting 12
4.3.4.2 Changing the emission count (frequency) to double or half 13
4.3.5 Emission duration mode 14
4.3.6 Phase mode 15
4.4 External synchronous emission 16
4.4.1 Emission count mode 16
4.4.2 Emission duration mode 17
4.4.3 Phase mode 18
4.4.3.1 How to set the delay 19
4.5 Memory function 20
4.5.1 Saving each setting value 20
4.5.1.1 Saving on internal oscillation emission 21
4.5.1.2 Saving on external synchronous emission 22
4.5.1.3 Saving the setting value when the power is OFF 22
4.5.2 Reading out each setting value 23
4.5. 2.1 Reading out on internal oscillation emission 23
4.5.2.2 Reading out on external synchronous emission 24
4.6 Function mode 25
4.6.1 Moving to the function mode 25
4.6.2 Measurement range setting (Function mode 1) 26
4.6.3 Trigger edge setting (Function mode 2) 27
4.6.4 Auto emission stop time setting (Function mode 3) 29
4.6.5 Input signal setting (Function mode 4) 30
4.7 External I/O connector 31
4.7.1 SpecicationsforexternalI/Oconnectorandpinassignment31
4. 7. 2 External pulse input 32
4.7.3 External trigger pulse output 32
5 Specications33
6 External dimensions 34
7 Trouble shooting 35

4
1 Overview
A stroboscope tachometer is a measurement instrument to measure the speed (cycle) of rotating
objects that rotate at a constant speed, or moving objects that repeatedly operate at a constant
cycle.Whentherotation(motion)cyclematchestheashcyclewhilethestrobeashisperiodically
applied on a rotating or moving object, the rotating (moving) object image appears to stand still. This
stroboscopetachometerisnon-contactandcanbeusedtoreadtheashfrequencywhensuchastill
image appears. Also, a stroboscope can be used to make images of rotating or moving objects stand
still or slightly move in order to observe their appearances.
Main features
Wide-range measurement of 60 to120,000 fpm
Refer to 4.3.4.1 Emission count setting for details

Simply pressing the x2 or ÷2 key can change the emission count (frequency) to double or half
respectively
Refer to 4.3.4.2 Changing the emission count (frequency) to double or
half for details
The emission time (duty) can be changed by 0.1º within the range between 0.1º/ 360º to 3.6º/ 360º
Refer to 4.3.5 ash duration mode for details
The emission timing (phase) can be adjusted
Refer to 4.3.6 Phase mode for details
The external I/O function is implemented which enables emission in synchronization with the external
pulse, and enables the pulse signal in synchronization with the strobe emission to be output.
Refer to 4.4 External synchronous emission for details
2 Before use
2.1 Checking the contents
Check that the three items in the table below are supplied.
M odel DT-361 (AC power input model) DT-365 (Charging battery built-in model)
Main unit
DT-361 x 1 DT-365 x 1
Accessories
External signal I/O connector (8 pin) x 1
RM15WTPZA-8S(71)
Dedicated AC adapter x 1
Instruction manual This document x 1 This document x 1

5
2.2 Peel off the protection sheet
Peel off the protection sheet on the operation section.
O p erat i o n sect i o n
P eel o f f t h e ( t ransp arent )
p ro t ect i o n sh eet
2.3 Charging (only for DT-365)
Be sure to charge the battery before initial use. Before charging, be sure to check that the power is
turned OFF.
2.3.1 Charging method
Turn the power OFF and connect the supplied AC adapter's connector to the main unit. Next insert
the AC adapter's AC plug into an outlet. The battery lamp lights up and charging starts.
Charging is complete in approximately 2.5 hours. Then the battery charging lamp turns off.
* Be sure to use only the supplied AC adapter.
When the power is turned ON with the supplied AC adapter connected, charging ends and
operation starts.
* Note that operation and charging cannot be performed simultaneously.
C onnect the sup p l ied A C adap ter
Note 1) Since the battery current is automatically shut off when charging is complete, there is no need
to worry about overcharging.
Note 2) When the power is turned ON during charging, charging is canceled and emission starts. When
the unit uses the AC adapter as its power source, it is not charged.
Note 3) To extend battery life and charging capacity, it is recommended to deplete the battery fully
before charging. ( LLLLLL is indicated on the number display)
Note 4) If the unit is charged immediately after long periods of usage at a high ambient temperature,
the temperature rise protection circuit will turn on and the charging lamp may not light up. In
that case, disconnect the AC adapter and let the unit cool. When the product temperature is
decreased, connect the AC adapter again to start charging.
Note 5) Never charge the unit under the following conditions.
A dap ter of
another dev ice
•C har g ing near f l ammab l e mater ial s
•U sing another A C adap ter than sup p l ied.
O il

6
2.3.2 Indication of low battery voltage
If the remaining battery power drops to near zero, the number display alternates between the
process setting and LLLLLL. However, operation can be performed even when the battery is in this
low condition.
If the remaining battery power decreases further, the number display indicates only LLLLLL, which
then stops operation. Press the power switch and shut off the power immediately.
In either case, charge the unit according to the procedure in 2.3.1 Charging method .
•Indicationoflowbatteryvoltage
I ndicates al ter natel y
•Indicationofstoppedoperation
2.3.3 Battery replacement
Ifthefullychargedbatterycontinuallydecreases,pleasereplaceitwiththespeciedreplacement
battery. Please contact your local dealer for details.
1. Remove 4 screws located on the bottom of DT-365 and take out the battery assembly.
2. Remove the screws on the connector and the battery supporter and replace with the new
battery.
3. Fix the new battery with the screws and connect the connector.
4. Install the new battery assembly to DT-365.
C onnector
B attery
S crews
Fix with the hole facing the front.

7
3 Part names and functions
3.1 Main unit
S up er l uminosity L ED ( 1 8 l ig hts)
Pow er sw itch
Ex ter nal I / O connector
O p er ation
section
* T he imag e is f or D T - 3 6 5 .
3.2 Operation section
󰴥
󰴤
󰴦
󰴧
󰴫
󰴩
󰴪
󰴨
* T he imag e is f or D T - 3 6 5 .
No. Name Function description
󰴤Power switch Turns the power ON/OFF.
󰴥D ial Used to change the emission frequency or emission duration.
󰴦MODE key
Each press of this key switches the number display in the following order: Emission
frequency (FPM), Emission duration, Emission delay duration (PHA), Emission
frequency (FPM)...
󰴧
LOAD (SAVE) key
Reads the saved setting value.
Also, saves the current setting value by pressing and holding it.
󰴨SIG key Switches the internal oscillation emission and external synchronous emission.
󰴩UNIT key
Switches to indicate the emission time when the emission duration is indicated. When
the delay duration is indicated, each press of this key switches indication of the delay
time and angle.
󰴪x2 key Each press of this key during on internal oscillation emission alters allows the
performance of emission by double the current set emission count (frequency).
󰴫÷2 key Each press of this key during on internal operation mode drops the current emission by
half the count (frequency).

8
3.3 Display
3.3.1 Part names
N umer ical disp l ay
U nit disp l ay
M ode disp l ay
Emission setting
disp l ay
M emor y numb er disp l ay
C har g ing l amp ( onl y f or D T - 3 6 5 )
3.3.2 Number display
•Indicatesthesettingvalueoftheemissioncount(frequency)ininternaloscillationemissionmode.
•Indicatestheexternalsignalfrequencyinexternalsynchronousemissionmode.
•Eachsettingvalueisindicatedinthefunctionsettingmode.
* For details about the function setting mode, refer to 4.6 Function mode.
3.3.3 Unit display
Indicates the unit of the value on the number display.
Emission dur ation ( ang l e)
D el ay dur ation ( p hase)
Emission dur ation ( time) D el ay time
3.3.4 Emission setting display
Indicates the emission setting.
I nter nal oscil l ation emission Ex ter nal sy nchr onous emission
3.3.5 Mode display
Indicates the mode on the number display.
Emission count mode Emission dur ation mode Phase mode
3.3.6 Memory number display
Indicates the memory number on the number display.
When all the numbers go off the memory number 0 (free mode) is assigned and the previous
setting value is indicated.
3.3.7 Charging lamp (only for DT-365)
Lights up while charging and goes off when charging is complete.

9
4 Functions and operations
4.1 Power ON/OFF
Press the power switch when the power is OFF to turn the power ON.
When the power is turned ON, the model is indicated, followed by internal oscillation emission or
external synchronous emission.
Operation D isplay
When the power is
OFF
Press the power
switch
The indication of internal oscillation
emission is indicated and emission
starts.
Internal oscillation emission
when the power was last OFF
External synchronous emission
when the power was last OFF
The indication of external synchronous
emission is indicated and the unit
enters the standby mode for the
external signal.
* When DT-365 is used, the indication may go off immediately after the power is turned ON. In that case,
charge the unit because the remaining battery level is low. For details about charging, refer to 2.3
Charging.
Press the power switch when the power is ON to turn the power OFF, then the indication goes off.
Operation D isplay
When the power is ON
Press the power
switch
I ndicated l etter s g o of f .
* When the power is turned ON, the following indication may be displayed.
The following is the error message showing EEPROM read failure. Press the x2 key to return to the normal
emission screen from the error message display.
Operation D isplay
Press the x2 key R etur ns to the nor mal
setting scr een
Er r or disp l ay
EEPR O M r ead f ail ur e

10
4.2 Emission setting
Each press of the SIG key switches between internal oscillation emission and external synchronous
emission.
Operation D isplay
Each press switches
the emission settings
I nter nal oscil l ation emission Ex ter nal sy nchr onous emission

11
4.3 Internal oscillation emission
4.3.1 Display of internal oscillation emission
S etting v al ue
M ode disp l ay
M emor y numb er
disp l ay
D isp l ay show ing inter nal
oscil l ation emission
4.3.2 Switching the modes
Each press of MODE key switches the setting display value to FPM (emission count mode), DUR
(emission duration mode), and PHA (phase mode).
Operation D isplay
Each press switches
the modes
Emission dur ation mode
Phase mode
Emission count mode
4.3.3 Switching the unit display
While the UNIT key is pressed and held in the emission duration mode (DUR), the unit display is
switchedfrom[DEG]to[μs].
Each press of the UNIT key in the phase mode (PHA) switches the unit display from [DEG] to [ms].
Button operation D isplay
Indicates time while
the key is being
pressed
•Emissiondurationmode(DUR)
I ndicates ang l e I ndicates time
Each press switches
the display
•Phasemode(PHA)
I ndicates ang l e I ndicates time

12
4.3.4 Emission count mode
The emission count (frequency) can be set in the emission count mode (FPM).
4.3.4.1 Emission count setting
Turn the dial to the CW direction to increase the emission count (frequency), and to the CCW
direction to decrease it. Turn the dial fast to change the setting value greatly and slowly to change
it slightly.
The emission count (frequency) you can set depends on the measurement range. For details about
the measurement range, refer to 4.6.2 Measurement range setting.
Press the MODE key to switch to the emission duration mode (DUR).
Operation D isplay
Increase/decrease
the emission count
(frequency)
Decrease Increase
CCW
CW
Press the key to
switch to the emission
duration mode Emission count mode Emission dur ation mode

13
4.3.4.2 Changing the emission count (frequency) to double or half
The emission count (frequency) can be changed to double or half of the current setting value using
the key operation on internal oscillation emission.
1) To change the emission count (frequency) to double of the current setting value
Each press of the x2 key changes the emission count (frequency) to double of the current setting
value on internal oscillation emission.
Operation D isplay
Each press
increases the
emission count to
double
Emission count mode
1,500fpm
Emission count mode 3 , 0 0 0 f p m Emission count mode 6 , 0 0 0 f p m
* If the doubled emission count (frequency) goes beyond the value in the measurement range, the key
operation will be disabled.
The emission count (frequency) after change provides the value according to the setting display
resolution (for details about the setting display resolution, refer to 5 Specications). For this reason,
after pressing the "x2" key and doubling the emission count (frequency), the value may not be returned
to the initial value even by pressing the "÷2" key and halving it.
2) To change the emission count (frequency) to half of the current setting value
Each press of the "÷2" key changes the emission count (frequency) to half of the current setting
value on internal oscillation emission.
Operation D isplay
Each press
decreases the
emission count to
half
Emission count mode
1,500fpm
Emission count mode 7 5 0 f p m Emission count mode 3 7 5 f p m
* If the half of the emission count (frequency) goes below the value in the measurement range, the key
operation will be disabled.
The emission count (frequency) after change provides the value according to the setting display
resolution (for details about the setting display resolution, refer to 5 Specications). For this reason,
after pressing the "÷2" key and halving the emission count (frequency), the value may not return to the
initial value even by pressing the "x2" key and doubling it.

14
4.3.5 Emission duration mode
The emission time (ratio) can be set by 0.1º within the range between 0.1º/ 360º and 3.6º/ 360º in
the emission duration mode (DUR). The emission time setting value shows the strobe emitting
time by angle while a rotating object rotates one revolution (360º).
*Themaximumvaluefortheemissiondurationis400μs.
While the “UNIT” key is being pressed, the value converted from the emission angle to time can be
checked.
A longer emission time increases the brightness, but a measured object appears to be moving.
Also, a shorter emission time decreases the brightness, but a measured object appears to stand
more still.
Adjust the appropriate emission time according to your application and conditions and use the unit.
Press the MODE key to switch to the phase mode (PHA).
Operation D isplay
Increase/decrease
the emission angle
Indicates the
emission time while
the key is being
pressed
Emission ang l e: D ecr eases Emission ang l e: I ncr eases
I ndicates the v al ue conv er ted
f r om the emission ang l e to time
I ndicates the v al ue conv er ted
f r om the emission ang l e to time
C W
CCW
Press the key to
switch to the phase
mode
Emission dur ation mode Phase mode

15
4.3.6 Phase mode
Whentherotation(motion)cycleofameasuredobjectmatcheswiththestrobeashcycle,the
measured object appears to stand still. To change the angle (position) to make the object stand
still, use the phase mode.
The phase can be changed by 1º using the dial within the range between 1º and 359º in the phase
mode (PHA).
Press the UNIT key to set the phase change by time. The phase can be changed by 1 ms within
the range between 0 ms and 999 ms (max.).
When time is used for setting, a longer time duration than the emission cycle cannot be set.
Press the MODE key to switch to the emission count mode (FPM).
Operation D isplay
Increase/decrease
the delay angle
Each press switches
the delay time
display
D el ay ang l e: D ecr eases D el ay ang l e: I ncr eases
D el ay time: D ecr eases D el ay time: I ncr eases
CCW
C W
CCW
C W
Press the key to
switch to the emission
count mode
Phase mode Emission count mode

16
4.4 External synchronous emission
External synchronous emission is the function to emit a strobe flash in synchronization with an
external pulse.
•Toactivateexternalsynchronousemissionmode,referto4.2 Emission setting.
•Theselectioncanbemadewhethertheemissionistriggeredbasedontherisingedgeoftheexternal
pulse or the falling edge. Refer to 4.6.3 Trigger edge setting.
•Timing(delay)fromtheexternalpulseentrytostrobeashemissioncanbeoptionallyset.
4.4.1 Emission count mode
M easur ement v al ue of the emission count ( f r eq uency )
I ndicates the ex ter nal
sy nchr onous emission
M ode disp l ay
I ndicates the memor y
numb er
*The external pulse frequency is measured per each cycle and the average value in every 200 ms
increment is displayed.
Iftheexternalpulsecycleisbeyondthespecicationsrange,thefollowinglettersareindicated.
[Without the delay angle setting]
Measurable range 40 to 35,000fpm
W hen the ex ter nal inp ut p ul se
f r eq uency g oes b el ow 4 0 f p m
W hen the ex ter nal inp ut p ul se
f r eq uency g oes b ey ond 3 5 , 0 0 0 f p m
[With the delay angle setting]
Measurable range 60 to 10,000fpm
W hen the ex ter nal inp ut p ul se
f r eq uency g oes b el ow 6 0 f p m
W hen the ex ter nal inp ut p ul se
f r eq uency g oes b ey ond 1 0 , 0 0 0 f p m
Press the MODE key to switch to the emission duration mode (DUR).
Operation D isplay
Press the key to
switch to the emission
duration mode
Emission count mode Emission dur ation mode

17
4.4.2 Emission duration mode
The emission time (ratio) can be set by 0.1º within the range between 0.1º/ 360º and 3.6º/ 360º in
the emission duration mode (DUR). (The emission time setting value shows the strobe emitting
time by angle while a rotating object rotates one revolution (360º).)
*Themaximumvaluefortheemissiondurationis400μs.
While the “UNIT” key is being pressed, the value converted from the emission angle to time can be
checked.
A longer emission time increases the brightness, but a measured object appears to be moving.
Also, a shorter emission time decreases the brightness, but a measured object appears to stand
more still.
Adjust the appropriate emission time according to your application and conditions and use the unit.
Press the MODE key to switch to the phase mode (PHA).
* When the external synchronous signal has not been entered, [ _ _ _ _ _ _ ] and the emission time are
indicated alternately.
When the external synchronous signal has been entered, only the emission time is indicated.
Operation D isplay
Increase/decrease the
emission angle
Indicates the time
conversion value
while the key is being
pressed
Emission ang l e: D ecr eases Emission ang l e: I ncr eases
I ndicates the v al ue conv er ted
f r om the emission ang l e to time
I ndicates the v al ue conv er ted
f r om the emission ang l e to time
CCW C W
Press the key to
switch to the phase
mode
Emission dur ation mode Phase mode

18
4.4.3 Phase mode
Delay emission can be set within the input signal range between 60 fpm and 10,000 fpm.
Inthephasemode(PHA),thedelayanglefromtheexternalpulseentrytostrobeashemission
can be changed by 1º using the dial within the range between 1º and 359º.
Press the UNIT key to set the phase change by time. The phase can be changed by 1 ms within
the range between 0 ms and 999 ms (max.).
When time is used for setting, a time longer than the emission cycle cannot be set.
Press the MODE key to switch to the emission count mode (FPM).
* When the external synchronous signal has not been entered, [ _ _ _ _ _ _ ] and the delay setting values
are indicated alternately.
When the external synchronous signal has been entered, only the delay setting value is indicated.
Operation D isplay
Increase/decrease
the delay angle
Each press switches
the delay time
display
D el ay ang l e: D ecr eases D el ay ang l e: I ncr eases
D el ay time: D ecr eases D el ay time: I ncr eases
C C W
C W
C C W
C W
Press the key to
switch to the phase
mode
Phase mode Emission count mode

19
4.4.3.1 How to set the delay
The delay angle from the pulse input to emission can be set by 1º within the range between 1º
and 359º by setting one cycle of the external pulse to 360º. Measure the external pulse frequency
per cycle, and calculate the delay angle based on the measured frequency to perform the delay
emission.Sinceadelayofapproximately30μsalwaysexistsfortheinternalcalculation,theactual
delay time is calculated as follows:
Delay setting angle × External pulse cycle + Approximately 30 μs
360°
[Example 1] When setting the input frequency to 10 Hz (600 fpm), trigger edge to rising, and
delay angle to 36º
Ex ter nal p ul se
( Pul se enter ed f r om an
ex ter nal dev ice to D T - 3 6 1 / 3 6 5 )
S tr ob e emission
100ms360º
1 0 ms36º
F r eq uency
cal cul ation
D el ay
emission
F r eq uency
cal cul ation
100ms360º
1 0 ms36º

D el ay
emission
* When the delay unit is set to ms in the above example, the delay time can be set within the time range
of less than one cycle input pulse (0 ms to 99 ms).
•Sincethedelayangleiscalculatedbasedonthepreviouslyenteredpulsecycle,iftheexternal
pulse frequency changes, emission cannot be performed at a precise angle. Also, since the
external pulse cycle becomes shorter than the previous pulse cycle, if the next pulse is entered
before delay angle emission, the delay angle setting will be disabled, and emission is performed
simultaneously* with the external pulse.
•Whenthedelayangleissetto0º,emissionisperformedsimultaneously*with the external pulse.
* Since there is a delay caused by the internal calculation process, the strobe actually emits light in
approximately30μsaftertheexternalpulseisentered.
(note) Increasing the setting value by 1deg from 359deg, it becomes 0deg.

20
4.5 Memory function
Each setting value can be saved and read out.
4.5.1 Saving each setting value
This function is used to save each setting value.
There are two types of saving methods, one is to save a parameter by pressing and holding the
“LOAD(SAVE)” key, and the other is to save a setting value by turning the power OFF.
Thenumberofdataentriesthatcanbeset isveoninternaloscillationemissionandexternal
synchronous emission respectively when saving by the “LOAD(SAVE)” key, and one when saving
by power OFF.
Setting values that can be saved
Saving method Save a parameter using the
“LOAD(SAVE)” key Save when the power is turned OFF
Emission status when the value is saved
Internal
oscillation
emission
External
synchronous
emission
Internal
oscillation
emission
External
synchronous
emission
Memory number that can be saved 1 to 5 1 to 5 - -
Emission mode (INT/EXT) × × ○ ○
Setting mode (FPM/DUR/PHA) ○ ○ ○ ○
Internal
oscillation
emission
(INT)
Emission frequency (FPM) ○×○ ○
Emission duration (DUR) ○×○ ○
Delay angle (PHA) ○ ×○ ○
Delay time (PHA) ○ ×○ ○
External
synchronous
emission
(EXT)
Emission duration (DUR) ×○○○
Delay angle (PHA) ×○○○
Delay time (PHA) ×○○○