YFYIQI U-508 Sonic Belt Tension Meter User Manual

YFYIQI U-508 Sonic Belt Tension Meter

This manual describes the operation procedure of U 508. Please read this manual thoroughly before for full use of functions.

Precautions

• Please read these precautions carefully. And Keep this manual safe for future reference.
• These precautions are written to defend the user to keep other people from harm, and to prevent other damages. Please pay attention to these precautions.
• These signs indicate the level of danger that can be expected by improper use.

Danger

• Imminently dangerous situation, such as death or severe injury

Warning

• Can cause breakdown, injury, and electric shock

Caution

• Injury or physical damages
• Things the user must NOT do.
• Things the user must do.

Warning

• Do not make a strong impact or throw.
• Can cause breakdown and fire
• Do not use this in a flammable environment.
• Can cause an explosion or the fire when using this near propane gas or gasoline.
• Do not break down or change.
• Can cause injury.
• Do not put liquids such as water or solvents on the meter. Do not use the sensor in a wet or oily environment.
• Please measure the tensile force after confirming the machine has been turned off.
• Please turn off the power, immediately right after you hear a thunder noise and move to a safety place.
• Can cause an electric shock

Caution

• Avoid keeping at the place where much humidity, dust and high temperature are present.
• Can cause the break down
• Do not use solvents (thinner and benzene, etc.) for maintenance.
• Do not put on an unstable place like a sloping table.
• Can cause injury or breakdown
• Do not leave or use this sensor in the direct sunlight or high temperature place.
• Even though the arm parts of the sensor are flexible, do not bend at an acute angle. Please do not bend it close to the head of the sensor (within 20mm from the sensor), and also do not bend it at the bottom of the sensor. Do not
  grab or twirl the cord strongly.

Brief summary, caution & check points for failure

Brief summary

• The sonic belt tension meter (U-508) is the handy equipment which enables to measure the tension accurately by analyzing sonic wave without touching.
• A sensor catches the produced eruption of sound wave by pick the belt span. After that, the high processing computer analyzes it and shows the result on the screen digitally.

Check points for the immeasurable state

• [Failed to measure or the results were fluctuated significantly.］
• Please inquire to us or the dealer where you purchased if the U-508 does not work after checking the points above.

Measurement principle of U-508

When we make a belt between pulleys vibrate by giving impact, it starts to oscillate irregularly as seen in Fig.1, but gradually it oscillates an inherent regular moves. The U-508 tension meter was created to address this phenomenon. In the past, there was no easily implemented device which could catch these small waves. We succeeded in catching the period of wave pattern relatively easily by developing a data handling method to capture the vibration frequency that made full use of microcomputer. As for the system, sensor detects the vibration waveform, microcomputer calculates the character vibration number by processing the data. To calculate the belt tension, we use “the transverse vibration of the thread” for setting at a tension as right side.

Therefore, it is required to input the length of span to be measured and the mass of beIt （ unit mass x width by use o f numeric key.

Here, the belt and the wire have a rigidity, which is different from the string, therefore U 508 measurement displayed is somewhat higher than the actual tension under the affected condition. Therefore, it i s possible to obtain correction factor by strict calibration test and incorporate it to the data input, thereby it can display more accurate tension. An example of calibration result of U 508 measurement and actual tension is shown below:

Explanation of the parts of U 508 main body

How to input the data

How to input the unit mass（Refer to the unit mass tables on next page）

• Tooth & Flat timing belt To input the unit mass is width(mm) × length(m) in g/mm width × mLength.
  1. Data capacity is 000.1～999.9g/mm width × m Length
  2. Able to input with four significant digit figures of three columns of integers and decimal one column
• Tooth & V belt from the pre-install data Push “MASS” bottom more than one second, belt type shows up on the screen. With using “UP” or “DOWN” button to select and push “MEASURE” to set.
• V, V-Ribbed belt and Wire Input the mass per meter of length in “g/m length” for unit mass. Able to input by four significant digits, i. e. three digits of integer and one digit below decimal point from 000.1 up to 999.9 g/m L. Unit mass corresponds to one piece for V-belt and wire, and one rib for V-ribbed belt.

Note: Unit mass of U-508, U-507, and U-505, U-305 is 10 times the input of conventional type U-303 since the input unit has been changed. Therefore, when a value is input in conventional unit mass （g/cm2）, measured tension is displayed in 1/10. （No change for the measured frequency  on the screen）

How to input the belt width or the number of belts (ribs)

• Timing or Flat belt To put the date is for belt width is 000.1mm～999.9mm, three digits of integer and one digit below decimal point in mm.
• V, V ribbed belt, Wire For V belt and Wire, put one piece. For V ribbed belt, put the number of ribs of V-ribbed belt.

How to put the value of span length

Span length is a distance between contacts with pulley, and can be calculated by the f following calculating formula. Alternatively, measure the distance between pulley contacts with a tape measure and put.

• S: Span length mm
• C: Distance between axes mm
• Dp: Large pulley pitch outer diameter mm
• dp: Small pulley pitch outer diameter mm

Unit mass table of the preinstalled belt

Table1: Tooth and V belt list
Refer to the explanation of “MASS” button at page 5 and 6. As for the special pitch or the belt, please refer the unit mass table on the next page and input correctly.

Unit mass table of Asia tooth shape timing belt

Table2: For U-508, 507, and U-505, 305 unit mass table
Data of unit mass can be input by four significant digits, i.e. three digits of integer and one digit below decimal point in g/mm W x m L from 0.1 to 999.9 g/mm W x m L.

• List of timing belt unit mass specified as standard configuration 1 Timing belt

The unit mass table of V belt made by Sankers

Table 3: Specialized unit mass table for U508, 507, 505, 503
The V belt has high comparative rigidity, the gap of revision is necessary for the actual and measured tension value in the range of the standard installation tension. Therefore, it should be adopted as WEIGHT level which is calculated by the following; [M (g/m length) = Mass per meter length of one rib (g/m length) x Tension correction factor]

• Contact us for unit mass of toothed belt for automobile engine and V-ribbed belt for driving automobile engine auxiliary equipment.

Note: Inquire to us for the unit mass of V-ribbed belt and tooth belt for automobile engines  with and automobile engine supplementary plane drive.

The standard installation tension table of the GUA timing belt

About the installation tension level of our tooth belt, the gap will not occur between U-508 measurement and true tension in the range of Note1 and Note3. So it is not necessary to set a tension compensating rate.

• Note1）As for the measuring installation tension, set the belt on the machine first and measure the average tension of stretch and loose side of the belt after spinning several times to make the machine run smoothly. If both spans have the difference of more than 30%, please adjust them and measure again.
• Note2）Measure with a span having the length more than 20 times the tooth pitch. （Because a higher value than actual is showed at the short range to be affected by the rigidity of the belt itself.)
• Note3）Set the tension range more than 1/3 of standard installation tension. （Because a higher value than actual is showed at the low tension to be affected by rigidity of belt itself.) Also by the measuring method of our tension meter, measurement in an extremely low tension range is sometimes impossible.
• Note4）As for the special belt like a wide and back-ribbed belt on its back for conveying, the gap between the true tension value is presumed,  so that simple calibration is required for checking tension which needs comparative precision.

As for experienced machines install the belt following the procedure provided for a corresponding machine, it is capable of managing tension by setting cycle numerical value which approved by U-508 afterward.

Specification of U-508

Main Body

• Power Supply: Two triple A batteries. Alkaline battery is recommended.
• Overall Size: 160(H) × 59(W) × 26(26)
• Mass: 120g
• Temperature and humidity range for use and storage: -10～-50℃, 80% (free from condensation)

Accessories

• U-508

1. Flexib le type sensor
   • Sensor outer diameter: 12.5mm
   • Total length: 170mm
   • Measurable frequency band: 10Hz～5000Hz
2. Soft case for carrying
   • Capable of containing the body of the tension meter, flexible type sensor etc.
   • Total length: 170mm
   • Measurable frequency band: 10Hz～5000Hz
3. Two triple A batteries
4. Operation manual of U-508
5. Operating procedure sheet for carrying
6. Inspection acceptance certificate
7. Warranty
8. Two USB connecting caps (one is for a spare)
9. Operating manual of application software for U-508
   • Please use the MINI-B 5 as a USB connector

Option

1. Side type sensor
   • Sensor outer diameter: Thickness10mm, Width20mm
   • Total length: 170mm
   • Measurable frequency band: 10Hz～5000Hz
2. Long type sensor
   • Sensor outer diameter: 12.5mm
   • Total length: 350mm
   • Measurable frequency band: 10Hz～5000Hz
3. Electromagnetic type sensor
   • Total length: 1m
   • Measurable frequency band: 10Hz～5000Hz
4. Cord type sensor
   • Sensor outer diameter: 12.5mm
   • Total length: 1m
   • Measurable frequency band: 10Hz～5000Hz

Guarantee & Repair Guidelines

Thank you for choosing our sonic tension meter (U-508). We guarantee for one year for the main body and six months for the sensor. If our sonic tension meter (U-508) fails due to a manufacturing or workmanship defect during the period, we repair it free of charge. Please contact our distributor from which you purchased for the repair. (See the enclosed warranty.) When the official approval is required, direct the sensor to a communicator which emits stable frequency sound from 10 to 5000 Hz, and measure the same way as measuring tension. The calibration is enabled easily. Tension meter official approval device (U-305-OS1) is also in the market. If needed, please contact our sales department for paid official approval.

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