98585A High Intensity LED Stroboscope Digital Tachometer DT-361/365 Instruction manual Be sure to read before use. Before use, please carefully read these safety precautions as well as instructions, and follow them for proper use.
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.
- Contents 1 2 3 4 5 6 7 Overview Before use 2.1 Checking accessories 2.2 Peel off the protection sheet 2.3 Charging (only for DT-365) 2.3.1 Charging method 2.3.2 Indication of low battery voltage 2.3.3 Battery replacement Part names and functions 3.1 Main unit 3.2 Operation section 3.3 Display 3.3.1 Part names 3.3.2 Number display 3.3.3 Unit display 3.3.4 Emission setting display 3.3.5 Mode display 3.3.6 Memory number display 3.3.7 Charging lamp (only for DT-365) Functions and operations 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 flash cycle while the strobe flash is periodically applied on a rotating or moving object, the rotating (moving) object image appears to stand still.
2.2 Peel off the protection sheet Peel off the protection sheet on the operation section. Operation section Peel off the (transparent) protection sheet 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.
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 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 .
3 Part names and functions 3.1 Main unit Super luminosity LED (18 lights) Operation section External I/O connector Power switch * The image is for DT-365. 3.2 Operation section ⑤ ⑥ ④ ⑦ ③ ② ⑧ ① * The image is for DT-365. No. Name ① Power switch Turns the power ON/OFF. Function description ② Dial Used to change the emission frequency or emission duration.
3.3 Display 3.3.1 Part names Charging lamp (only for DT-365) Memory number display Numerical display Mode display Unit display Emission setting display 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.
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 When the power is OFF Display Internal oscillation emission when the power was last OFF The screen of internal oscillation emission is indicated and emission starts.
4.2 Emission setting Each press of the SIG key switches between internal oscillation emission and external synchronous emission.
4.3 Internal oscillation emission 4.3.1 Display of internal oscillation emission Setting value Mode display Memory number display Display showing internal oscillation 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 Display Emission count mode Emission duration mode Each press switches the modes Phase mode 4.3.
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.
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.
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). 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.
4.3.6 Phase mode When the rotation (motion) cycle of a measured object matches with the strobe flash 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 0.1º 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.).
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. •You can set which edge of the external pulse triggers the emission, the rising edge or falling edge. Refer to 4.6.3 Trigger edge setting. •Timing (delay) from the external pulse entry to strobe flash emission can be optionally set. 4.4.
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).) 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.
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 flash emission can be changed by 0.1º 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.
4.4.3.1 How to set the delay The delay angle from the pulse input to emission can be set by 0.1º 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.
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.
4.5.1.1 Saving on internal oscillation emission Press and hold the “LOAD(SAVE)” key in the Internal oscillation emission mode to save the setting value. Press and hold the LOAD(SAVE) key to enter the save standby status. SAVE and the memory number in which the setting value is saved are indicated alternately. In this status, a memory number in which the setting value is saved can be changed using the dial operation. Operate the dial to end alternate lighting.
4.5.1.2 Saving on external synchronous emission Press and hold the “LOAD(SAVE)” key in the external synchronous emission mode to save the setting value. Press and hold the LOAD(SAVE) key to enter the save standby status. SAVE and the memory number in which the setting value is saved are indicated alternately. In this status, a memory number in which the setting value is saved can be changed using the dial operation.
4.5.2 Reading out each setting value This function is used to read out each setting value. 4.5.2.1 Reading out on internal oscillation emission Press the “LOAD(SAVE)” key in the internal oscillation emission mode to read out the setting value. Each press of the “LOAD(SAVE)” key changes the memory number to call. Each press of the LOAD(SAVE) key changes the memory number in the order of 1->2->3->4->5>0 (free mode)->1->.... The memory number being read is indicated on the memory number display.
4.5.2.2 Reading out on external synchronous emission Press the “LOAD(SAVE)” key in the external synchronous emission mode to read out the setting value. Each press of the “LOAD(SAVE)” key changes the memory number to call. The memory number being read is indicated on the memory number display.
4.6 Function mode The following settings in the table can be configured in the function mode. Setting item Default setting value Measurement range setting 120,000 Function mode 2 Trigger edge setting L-H Function mode 3 Auto emission stop time setting 0 Function mode 4 External input signal setting OFF Function mode 1 4.6.1 Moving to the function mode Turn the power ON while pressing the MODE key to enter the function mode.
4.6.2 Measurement range setting (Function mode 1) This function is used to set the measurement range on internal oscillation emission. The measurement range has two levels. The indicated contents depend on the measurement unit setting. Measurement unit fpm *Measurement range 60 to 12,000 60 to 120,000 (Available setting range: 60.0 to 12,000.0) (Available setting range: 60.0 to 12,000.0) * The emission count saved in the memory will be x10 or 1/10 by changing the measurement range.
4.6.3 Trigger edge setting (Function mode 2) In the external trigger mode in which the edge of the external pulse triggers emission, the rising edge or falling edge can be set.
Turn the dial to the CW direction to set the trigger edge to H-L (falling). Turn the dial to the CCW direction to set the trigger edge to H-L (rising). Operate the dial to stop the alternate display and only the trigger edge setting value is indicated.
4.6.4 Auto emission stop time setting (Function mode 3) This setting is used to stop the emission automatically when no operation is performed for a certain period of time. The available setting time is within the range between 0 min and 120 min, which can be changed by 1 minute. When it is set to 0, the auto emission stop function is turned OFF and emission is performed continuously. When emission is stopped by the auto emission stop function, use the key or dial operations to restart emission.
4.6.5 Input signal setting (Function mode 4) Signals to be entered for external synchronous emission can be selected either from open collector input or voltage pulse input. Set it to ON to select open collector input, and OFF to select voltage pulse input. For details about the circuit, refer to 4.7.2 External pulse input. Press the MODE key to save the settings in the function mode and move to the emission screen.
4.7 External I/O connector 4.7.
4.7.2 External pulse input Connect the unit to external devices (sensors, etc.) to allow the strobe to emit light using the pulse signal from those devices in the external trigger mode. (For details, refer to 4.4 External synchronous emission) Available input frequency : Available measurement range 40 to 35,000fpm Available delay emission range 60 to 10,000fpm Available input pulse : Hi 2.5 to 12V : Lo 0 to 0.
5 Specifications Model Application 60 to 120,000fpm Setting accuracy ±0.02% Setting display resolution (internal oscillation) Available to set to the range between 60 fpm and 120,000 fpm, or 60 fpm and 12,000 fpm (Set in function mode 1) Measurement range: 60 to 12,000fpm 60.0 to 3,000.0 : 0.1fpm 3,000.2 to 6,000.0 : 0.2fpm 6,000.5 to 12,000.0 : 0.5fpm Measurement range: 60 to 120,000fpm 60.0 to 30,000 30,00.2 to 60,000 60,00.
Memory function •Saving the setting value when the power is OFF •Saving 5 setting values each on internal oscillation and external synchronous emission respectively Auto emission stop Available to set continuous emission, or set the time to stop emission by 1 minute within the range between 1 min and 120 min. (Set in function mode 3) Power Built-in NiMH battery •Continuous emission time Approx. 2 hours (when the emission duration is set to 3.6º) Approx. 5 hours (when the emission duration is set to 1.
7 Trouble shooting Symptoms Factors Causes DT-365 does not flash and the display shows LLLLLLL.
