PCE Instruments PCE-DSX 20 Manual de Usario

PCE Instruments Equipo de medición PCE-DSX 20

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I. Introduction about the functions

Digital stroboscope tachometer is a rotation speed measuring device that makes use of persistence of vision (when the

light source synchronizes with the rotation speed of an object at a pre-set flashing frequency, a relatively static phenomenon

called visual persistence will occur).

In the course of observation of an object that rotates or moves at a high speed, adjust the flashing frequency of the device to

synchronize it with the rotation or movement speed of the object. Although the object being measured moves at a high speed, it

looks like moving slowly or static. This is an optical phenomenon of visual persistence whereby high-speed movement of

an object can be easily observed with the naked eye. By using this method, the rotation speed of various rotating objects can

be measured, and the movement and defects on the surface of an object can be inspected or detected. It is widely used to detect

the defects on the surface and movement track of high-speed rotating objects such as various types of rotors, meshing

gears, vibration diagnostic equipment as well as textiles, printing production lines, etc.

II. Performance features

* The advanced technology such as micro-computer technology (CPU), photovoltaic technology and anti-jamming technology

are applied to conduct non-contact measurement of rotation speed, as well as to inspect the status of moving objects and detect

defects on the surface.

* Large LCD with backlight, which ensures a clear display of data and the avoidance of visual errors.

* Two regulation ways: single-step regulation (coarse/fine tuning) and continuous regulation (course/fine tuning).

* There are special backlight and flash control switches available, saving battery power.

* When the power supply voltage is lower than the required value, the device will automatically indicate it.

* The device has a sturdy and exquisite structure. Durable electronic components are used. Its shell is made of light solid ABS

plastic with excellent shape. It is easy to carry and to operate.

* Data storage function available. Up to 10 sets of flash frequency data can be stored and can be retrieved at any time for use.

III. Technical parameters

Measurement range: 60-19999RPM

RPM: R / min

When the coarse / fine tuning range 1000RPM,＜

Coarse tuning: ±10RPM Fine tuning: ±0.1RPM

≥1000RPM,

Coarse tuning: ±100RPM Fine tuning: ±1RPM

Accuracy: 0.05%

Resolution: 1000RPM: 0.1RPM 1000RPM: 1RPM＜ ≥

Time base: quartz crystal oscillator

Display: LCD with backlight, Max.: 40000

Power supply: battery: 4 ×1.5V AA

Dimensions: 195 × 72 ×37mm

Weight: about 200g

IV. Displays

1. Fine tuning symbol. When it appears, it means fine tuning.

2. Measuring data stored symbol. (Press the data store button, you can see this

symbol show on the LCD, when the data already stored, the symbol disappear.)

3. Measuring symbol, the symbol appears means it is under measurement.

4. Measuring value.

5. Symbol for rotation speed unit, R / min.

6. Stored data of measurement.

7. Low-voltage prompt symbol. When it appears, it means that the battery power is low.

V. Appearance description

A. Object being measured

B. Optical path

C. Flash Light source

D. LCD

E. Light button

F. Data store button

G. Value increase button.

H. Power switch, data retrieval

button

I. Coarse / fine tuning switch button;

LCD backlight button

J. Value reduction button

DIGITAL STROBOSCOPE PCE-DSX 100

OPERATION MANUAL

VI. Operation

1. Select a place for observation:

As the surfaces of some objects are fissured, rough and uneven, which vary in light reflection, there are bright and dim lights, or

there are asymmetric texts, images or marks at different positions. We can select one of these most obvious positions as an

observation place. If the surface of the object is very smooth and gives the same light reflection, the surface can be made

fissured, rough or uneven manually, or some asymmetric texts, images or marks may be created on it.

2. Power on/off:

Open the battery compartment cover on the back of the shell，fit in batteries and press the starting button " " for a while. After

3 seconds, the device will start and the initial value of 4000RPM will be displayed. If the measurement data has been stored

after previous use, the latest measurement data stored will be displayed. At this time, the state of single-step coarse tuning is the

default. Press " " again for a while, after 3 seconds the device will turn off and cease operation.

3. Switch on the backlight:

Power on the device, if you long press the “FINE/BL” button you can open the backlight, long press this key again to close the

backlight.

4. Switch on the light source:

After you start the device, any time you press the light button, the light will flicker at the frequency value displayed on the

screen. After you stop pressing the button, the light will be off.

5. Coarse / fine tuning switch:

After you start the device, every time you press the "FINE/BL" button, you switch between coarse / fine tuning. In the case of

fine tuning, the characters "FINE" will appear on the left top of the display. In the case of coarse tuning, no prompt will appear.

6. Single-step regulation of rotation speed:

In the state of coarse tuning, every time when you press the "UP" button or the "DOWN" button, the value of rotation speed

will increase or reduce by 100RPM accordingly (when the tuning range 1000RPM) or 10RPM (when the tuning≥

range<1000RPM). in the state of fine tuning, every time you press the "UP" button or the "DOWN" button, the value of

rotation speed will increase or reduce by 1RPM accordingly (when the tuning range 1000RPM) or 0.1RPM (when the tuning≥

range<1000RPM).

7. Continuous regulation of rotation speed:

In order to improve the regulation efficiency and save the time of regulation, the device can also be regulated in a continuous

way. In case of single-step regulation, keep pressing the "UP" or "DOWN" button, after 1 second, the device will enter the state

of continuous regulation.

In the state of coarse tuning, the device will automatically increase or decrease by 100RPM (when the tuning range 1000RPM)≥

or 10RPM (when the tuning range <1000RPM) every 0.2s. In the state of fine tuning, the device will automatically increase or

decrease by 1RPM (when the tuning range 1000RPM) or 0.1RPM (when the tuning range<1000RPM) every 0.2s. Once you≥

stop pressing the button, continuous regulation will be terminated, and the device will be in the state of single-step regulation.

* (Regulation limits: In case of any tuning state, when the upper limit of 40000 RPM is exceeded, the device will automatically

remain at the 40000 RPM. At this time, if you press the "UP" button again, there will be no response. When the speed is lower

than the lower limit of 60RPM, the device will automatically remain at 60RPM. At this time, even if you press the "DOWN"

button, there will be no response.)

8. Data storage function

After of adjusting button speed, press the “MEM” in the center the the The device store panel to current value. next time the

device is started, the latest adjust measurement data stored you in it will be displayed and will not have to the flash frequency.

In in the the data future, pre-set stored the device can retrieved be at any time.

9. Data retrieval

Every can button Up 10 time after the measurement, you press the “MEM” to store the present value. to pieces of frequently

used stored stored data can be in the time device. Every you start the device, the latest value in the device will be displayed. In

case the the the one piece of retrieval of the data stored in device, press "READ" button, with every flick of button, of data will

be a displayed (short press). The frequently used stored retrieved data can be successively in cycling way.

1) After you start the device, press the light source button, direct the light bar onto the rotating surface of the object, observe

the light spot and adjust the flashing frequency of light. If the flashing frequency of light is adjusted to the same rotation speed

of the object, there will be a visual persistence phenomenon that the object appears static. If the surface is obviously uneven or

there are asymmetric texts, images, or marks on the surface of the object, the persistence of vision will be very obvious. When

the texts, images, or marks are almost static and the light spot flickers increasingly slowly, the fine tuning function can be

applied. At this time there will be N texts, images, or marks which are relatively stable or even static. (See Figure 1)

When N = 1, the texts, images or marks will be static and the light spot

does not rotate; at this time the value displayed on the device is the rotation

speed value of the object. When N =1, the texts, images or marks will be

static and the light spot does not flicker; at this time the value displayed on

the device is N times the speed value of the object. Divide the value

displayed on the device by N to calculate the actual speed value of the

object.

2) If the surface of the object is relatively smooth, adjust the flashing

frequency of the light until the light spot on the rotating surface of the

object no longer flickers, appears static and the brightest. At this time, the

value displayed on the device is the rotation speed value of the object.

(Because in this case, the optical phenomenon of visual persistence is not obvious so it is not easy for the testing personnel to

make observations. In order to improve the measurement accuracy, it is suggested that the user affix a small piece of reflective

slip or a label, or mark with a pen on the rotating surface.) If you select other places for observation, there will be a similar

optical phenomenon on the rotating surface of the object.

11. Monitor the movement of the object:

If you have already known the movement rate of the object, adjust the device to the corresponding flashing rate, press the flash

switch and direct the light bar to the moving surface of the object. If the optical phenomenon of visual persistence occurs (if the

object appears static, or the texts, images or marks are static and the light spot does not flicker), it indicates that the object

operates properly. If no optical phenomenon of visual, object does not operate properly and the movement speed has exceeded

the limited scope, so it is necessary to carry out maintenance.

Check if there are any defects on the surface of high-speed rotating object:

The optical phenomenon of visual persistence occurs when you measure the rotation speed. It is because the flashing frequency

of flash synchronizes with the rotation speed of the object. At this time the object appears static, and, even with the naked eye, it

is easy to detect if there is any defect on the surface of the object.

VII. Attention

1. If you know the approximate rotation speed of the object, better results can be achieved by using this device to measure

and monitor the rotation speed.

2. The surface of the object shall need to be fissured, rough and uneven, or there are obvious parts for reflection on the

surface, such as an electric drill bit, fan blades, etc.

3. When the voltage of power supply is lower than the required value, the low voltage prompt will appear at the left bottom

of the display, which means the voltage of batteries is too low and replacement of battery is required.

4. Do not direct the flash toward humans’ or animals’ eyes, as it may cause harm.

5. Do not leave the device close to water or any other corrosive liquid so as to avoid causing damages to the device.

6. If you will not use this device for a long time, please remove the batteries so as to avoid causing damages to the device as

a result of battery leakage.

10. Measurement of rotation speed:

Especificaciones del producto

Marca:	PCE Instruments
Categoría:	Equipo de medición
Modelo:	PCE-DSX 20

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