Gates 508C Sonic Tension Meter Manual
The Gates 508C Sonic Tension Meter is a device used to measure the tension of belts by detecting the natural frequency of a vibrating belt span. The meter includes a sensor, a LCD screen and a keypad for data input. It uses special sensors to detect belt oscillation wave forms and converts it into the natural frequency. To calculate belt tension, the Sonic Tension Meter system uses the “transverse vibration of strings theory.” To operate the meter, the belt mass, span length and width of the belt must be entered.
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Model 508C
Sonic Tension
Meter Manual
GatesAustralia.com.au/508C
Sonic Tension Meter Components
508C Meter
Cord Sensor
Optional Inductive Sensor
Optional Flat Flexible Sensor
Contents
Important Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . 4
Operating Theory . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Belt Mass Constants . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Belt Installation Tension . . . . . . . . . . . . . . . . . . . . . . . 14
Tips on Using the Gates Sonic Tension Meter . . . . . . 14
Meter Re-Calibration for Non-Standard Belts . . . . . . . 16
Summary of Features . . . . . . . . . . . . . . . . . . . . . . . . . 16
Optional Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Formulas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Warranty, Service, and Certification . . . . . . . . . . . . . . 23
1
Thank you for purchasing the
Gates Sonic Tension Meter .
Please read this manual thoroughly to fully utilise all the functions of this meter
.
Important Warnings
• Do not drop this unit . Impact of any kind can result in damage .
• Do not put water, solvent or any other liquids on this unit .
• Do not leave this unit in a dusty environment .
• Do not leave this unit where it will get hot, such as in a car or in direct sunlight .
• Do not use volatile solvents to clean this unit .
• Do not use this in an area where a spark could cause an explosion .
• Do not pull hard on the cord of the sensor (microphone) from either end .
• Do not use this unit outside during a thunderstorm, turn off power and seek a safe place . Non-compliance could result in electric shock from thunderbolt .
• Do not bend the flexible arm sensor (microphone) within 20 mm (3/4 inch) of either end, because the construction is tubular, and the flexible arm sensor should not be bent at sharp angles .
2
Cord type measurement sensor (microphone) standard .
One-touch connector
MEASURE key
POWER key
WIDTH key
MASS key
(unit mass)
UP/DOWN buttons
(frequency range selection)
0-button
(frequency range switching)
LCD screen with backlight
SPAN key
Power supply: 2ea . AAA size batteries
SELECT key
HERTZ key
(switching frequency and tension)
LED indicator lights
(Left: red
Right: green)
3
Operating Instructions
Attaching Sensor
Each of the male and female connectors has a notch on the surface .
Fit the connectors together at the notch and push them together . To disconnect, hold the collar on the sensor and pull out .
Turn on the power
Press the “POWER” key and the LCD screen display appears as follows:
1
2
3
5 4
6
1 – “MASS”
2 – “WIDTH”
3 – “SPAN”
4 – Storage Register Number
5 – Frequency Setting
6 – Battery Level Meter
The LCD screen is backlit for use in low light conditions . The screen and backlight remain on for up to five minutes of inactivity, then the unit automatically turns off .
The opening screen displays the contents of the data storage register that was last being used when the Sonic Tension Meter was turned off .
Values for (1) “MASS” (Belt Mass Constant), (2) “WIDTH” (Belt Width), and (3) “SPAN” (Belt Span Length) are all displayed simultaneously .
Important Note:
Reasonable non-zero belt constant values must be used in the storage registers in order to receive belt tension readings .
The unit will display span frequency values regardless of the belt constants entered, but will display “Error” and the red light will remain on if the calculated belt tension value is beyond the display range of the screen .
Pointer (4) indicates the data storage register number where current belt data is saved . To change the data or storage register number, refer to
“Input Data Storage and Retrieval” on page 6 .
Pointer (5) represents the current frequency filter setting . To change, refer to “Frequency Filter Settings” on page 6 .
Pointer (6) indicates the battery level meter . A dark battery symbol indicates a full charge . When the battery level becomes critically low, the meter indicator as well as a “Low Batt” message both blink .
4
Enter belt mass
M = h h h
.
h
g/m
Belt mass constants are provided on pages 11, 12, and 13 of this manual . Capacity available for input is from 000 .1 to 999 .9 grams/meter .
Press the “MASS” key and enter numbers on the keypad . Make sure the decimal is placed correctly in the display panel . If your entry is incorrect, press “MASS” again and the cursor returns to the original position . Enter belt width or number of rib/strands
W = h h h
.
h
mm/#R
Capacity available for input is from 000 .1 to 999 .9 millimeters or number of ribs or strands .
For a Synchronous belt, enter the belt width in millimeters .
For an Industrial V-belt, enter the number of strands being measured .
For a PolyFlex
®
JB
®
belt, enter the number of strands being measured .
For a Micro-V
®
belt, enter the total number of ribs .
For a 21 mm wide Poly Chain
®
belt, enter “021 .0”;
For a 1” wide PowerGrip
®
timing belt, enter “025 .4”;
For a single strand Industrial V-belt, enter “001 .0” .
When using the Sonic Tension Meter on drives with multiple single or
PowerBand
®
belts, be sure to use the appropriate mass constant and enter the correct number of belt strands being measured . There is no need to multiply the mass constant by the number of ribs/strands, as the
Sonic Tension Meter will calculate the correct total belt mass .
Example:
For a V-belt drive using four individual 3V belts enter “1” for the belt width (“WIDTH” key) . The Sonic Tension Meter will display the static belt tension per individual belt . When measuring the belt tension in the
V-belt drive, make sure the V-belts do not interfere with each other while vibrating .
If the same drive used a 4-strand 3V PowerBand
®
belt instead of single belts enter “4” for the belt width (“WIDTH” key) . The total belt tension for all four belts is measured as the entire belt vibrates . The Sonic Tension
Meter will display the total static belt tension for the PowerBand
®
belt (for all strands within belt) .
5
Enter the span length
S =
h h h h
mm
Capacity available for input is from 0001 to 9999 millimeters . The span length represents the distance between the contact points on adjacent sprockets/pulleys . This distance may be measured directly, or it may be calculated from the formula below . Calculating the span length provides the most accurate results .
Span Length Formula
Where: S = Span Length (mm)
CD = Center Distance (mm)
D = Large Pulley Diameter (mm) d = Small Pulley Diameter (mm)
Input Data Storage and Retrieval
Mass, width, and span values can be stored for up to 20 different drive systems . Press the “SELECT” key to toggle through the 20 storage registers . Storage registers can also be recalled by simply pressing the
“SELECT” key and the number that corresponds to the storage register .
The storage register number is displayed in the upper left hand corner of the LCD screen; Pointer (4) on page 4 .
The contents of all three data registers is displayed simultaneously .
The contents of a register can be changed by simply pressing the mass, width, or span key and entering a new value . The new value is automatically saved if the storage register is changed, or the meter is turned off .
Frequency Filter Settings and Ranges
A frequency filtering feature is available to focus the meter frequency measurement response to a narrower range . This can be useful in improving the response of the meter and in filtering out potentially interfering background noise .
Holding down the “0” button for 1-2 seconds will display a menu
that allows the frequency measurement range to be changed.
The available ranges are as follows:
High
Low
500 – 5000 Hz
Standard 10 – 600 Hz
10 – 50 Hz
6
The default setting is the “Standard” range and can be changed by pressing the “UP” and “DOWN” keys . To accept the highlighted range, press the “MEASURE” key . Note the letter in the upper left hand corner of the LCD display indicates the frequency range setting Pointer (5) on page 4; H - High, S - Standard, L - Low .
Microphone Gain Setting
The microphone gain level is set automatically when the unit is turned on, based upon environmental background noise . If maximum microphone sensitivity is desired, turn the meter on without the microphone attached and wait for the meter to power up . Then connect the microphone so tension measurements can be taken .
Measurement
Press the “MEASURE” key; the green LED light will begin flashing .
Tap the belt span to make the belt span vibrate . Hold the sensor approximately 1 cm (0 .4 inch) from the belt or closer without touching the belt . The green LED light will continue to flash until a signal is received by the sensor, then the green LED light will turn off and a wave-form graphic will appear on the LCD screen . After the signal is processed, the measured belt tension is displayed, the meter beeps three times, and the green LED light turns on indicating a successful tension measurement .
After a tension reading has been obtained, pressing the “Hz” key toggles the LCD display output between tension, frequency, or both .
If the belt signal cannot be measured, or the measured frequency of the calculated belt tension is out of the range of the meter, the red LED light will turn on . When this occurs, either the tension or frequency fields may also display “ERROR” .
To make another tension reading, simply tap the belt again . The auto-trigger feature will automatically re-activate the meter without pressing the “MEASURE” key .
Tension Display
T = h h h h h
Kg f
or lb f
or N
The displayed output of measured force can be switched between units of Kilograms force, Pounds force, and Newtons . This can be accomplished as follows:
With the unit powered off, press the “0” and “9” and “POWER”
keys at the same time. The meter will then turn on with the current unit of measure displayed . Units can then be changed by pressing the
“SELECT” key until the desired unit appears . Press and hold down the
7
“POWER” key again until the meter turns off . Now turn the meter on for normal operation . Data entered into the unit must still be in SI units of millimeters and grams .
The capacity available for output is 99,900 Pounds force, Kilograms force, or Newtons .
Frequency Display
F = h h h h
Hz
Pressing the “Hz” key toggles the LCD display output between tension, frequency, or both .
Measurement Errors
If either the calculated belt tension or measured frequency cannot be displayed the red LED light will turn on and the LCD screen may display
“ERROR” . If an error has been made in the measurement, “ERROR” will be displayed . Check the accuracy of the mass constants, width and span values and retry the measurement until a tension or frequency value is displayed . With the auto-trigger feature it is not necessary to press the “MEASURE” key again .
When a tension or frequency reading is obtained, take at least two additional readings for comparison . Three readings in relative close proximity indicate reasonably accurate belt tension readings .
Tension measurements made on belts at very low tensions may yield greater variability and a greater probability for errors . If a tension reading cannot be obtained, the belt may be too loose to generate a clear harmonic frequency signal . If this is the case, the belt may need to be tightened in order to obtain a tension reading . The optional Inductive
Sensor is more effective at very low frequencies than the conventional microphone sensors, and may provide better results .
NOTE: Frequency only readings must have data values in the storage registers or the meter’s red LED light will stay on .
Battery Gauge
A battery graphic is located in the upper-right hand corner of the LCD screen . This gauge provides an estimate of the remaining battery power .
A dark filled graphic indicates a full charge . When the battery level becomes critically low, the meter indicator as well as a “Low Batt” message both blink .
Optional Sensors
8
The 508C Sonic Tension Meter comes equipped with a Cord type sensor . The Cord type sensor provides the most effective results .
An optional Flat Flexible stick-type sensor allows one hand operation, but it is sometimes difficult to hold the meter and sensor still enough to maintain close and consistent clearance between the vibrating belt span and the sensor .
An optional Inductive Sensor relies on a magnetic field rather than on sound waves . This allows tension measurements to be taken in both noisy and windy environments . In order for the Inductive Sensor to function, a magnetic field must be present on the belt . This can be easily accomplished by taping a small magnet to the back of the belt .
9
Sonic Tension Meter Operating Theory
When an impulse is applied to a belt span, it first oscillates in all modes of vibration, but the higher frequency modes decay faster than the fundamental mode . This leaves a continuous sinusoidal wave that is related to a specific belt tension; note diagram .
Using a microcomputer, a data processing method to capture a belt’s natural oscillation frequency was developed . Using this method, the wave form frequency can be determined easily .
The new system uses special sensors to detect belt oscillation wave forms . Data from these sensors is sent to the microcomputer inside the Sonic Tension Meter for processing and conversion into the natural frequency . To calculate belt tension, the Sonic Tension Meter system uses the “transverse vibration of strings theory .” To operate the meter, the belt mass, span length and width of the belt must be entered .
Formula:
T = 4 x M x W x S
2
x f
2
x 10
-9
Where:
T = Belt span tension (Newtons)
M* = Belt mass constant (g/m)
W = Belt width (mm) or number of belt strands
S = Length of the span to be measured (mm) f = Natural frequency of the belt (Hz)
*Units of mass constant M for synchronous belts is g /(m)(mm) or g
/10 cm
2 along the belt pitch line . Constant M for V-belts represents the weight in grams of a 1 meter length of belting with a correction factor applied to compensate for internal bending resistance .
Unlike a string, belts have cross-sectional rigidity . Therefore, tension values measured by the meter may be higher than the actual belt tension, depending on the operating conditions under which the effects of rigidity arise . When the actual belt tension must be more precisely measured, a simple calibration test may be necessary .
10
Belt Mass Constants
Adjusted mass constants are for standard stock belts only . Nonstandard belt constructions may yield inaccurate results and may require special adjusted mass constants or special calibration procedures . Units are grams/meter per mm of width .
Poly Chain
®
GT
®
Carbon™
(all Poly Chain)
5MGT (5mm) . . . . . . . . . . . . . . . . . .3 .0
8MGT (8mm) . . . . . . . . . . . . . . . . . .4 .7
14MGT (14mm) . . . . . . . . . . . . . 7 .9
PowerGrip
®
Timing and TruMotion
®
MXL (0 .080”) . . . . . . . . . . . . . . . . . .1 .3
XL (0 .200”) . . . . . . . . . . . . . . . . . . . . .2 .4
L (0 .375”) . . . . . . . . . . . . . . . . . . . . . . . .3 .2
H (0 .500”) . . . . . . . . . . . . . . . . . . . . . . .3 .9
XH (0 .875”) . . . . . . . . . . . . . . . . . . .11 .3
XXH (1 .25”) . . . . . . . . . . . . . . . . . .14 .9
Twin Power
®
XL . . . . . . . . . . . . . .1 .9
Twin Power
®
L . . . . . . . . . . . . . . . .3 .2
Twin Power
®
H . . . . . . . . . . . . . . .4 .6
PowerGrip
®
GT
®
2,
GT
®
3 and TruMotion
®
2MGT (2mm) . . . . . . . . . . . . . . . . . .1 .4
3MGT (3mm) . . . . . . . . . . . . . . . . . .2 .8
5MGT (5mm) . . . . . . . . . . . . . . . . . .4 .1
8MGT (8mm) . . . . . . . . . . . . . . . . . .5 .8
14MGT (14mm) . . . . . . . . . . . . . .9 .7
Twin Power
®
3MR . . . . . . . . . .2 .8
Twin Power
®
5MR . . . . . . . . . .4 .1
Twin Power
®
8MGT . . . . . . . .6 .9
Twin Power
®
14MGT . . . .11 .4
PowerGrip
®
HTD
® and TruMotion
®
3M (3mm) . . . . . . . . . . . . . . . . . . . . . . .2 .4
5M (5mm) . . . . . . . . . . . . . . . . . . . . . . .3 .9
8M (8mm) . . . . . . . . . . . . . . . . . . . . . . .6 .2
14M (14mm) . . . . . . . . . . . . . . . . . .9 .9
20M (20mm) . . . . . . . . . . . . . . . . .12 .8
Twin Power
®
3M . . . . . . . . . . . . .2 .7
Twin Power
®
5M . . . . . . . . . . . . .4 .6
Gates Mectrol
®
Long Length (Steel)
XL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 .1
L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 .5
H . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 .9
H-HF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 .2
XH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 .5
T5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 .2
AT5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 .2
ATL5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 .6
T10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 .3
T10-HF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 .6
AT10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 .6
ATL10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 .7
ATL10-HF . . . . . . . . . . . . . . . . . . . . . . . . . . 6 .9
T20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 .3
AT20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 .9
ATL20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 .8
HTD5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 .1
HTD8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 .9
HTD14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 .7
HTDL14 . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 .3
STD5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 .9
STD8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 .1
11
Gates Mectrol
®
Long Length (Aramid)
XL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 .9
L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 .0
H . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 .2
WH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 .3
XH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 .1
T5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 .0
AT5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 .7
T10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 .6
WT10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 .9
AT10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 .2
T20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 .9
AT20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 .3
HTD8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 .7
HTD14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 .4
STD5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 .9
STD8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 .3
For a single V-belt, enter
1 rib/strand . When measuring a PowerBand
®
(multiple) rib/ strand belt, enter the number of ribs/strands per belt . Units are grams/meter per rib or strand .
Super HC
®
SPZ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
SPA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
SPB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186
SPC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 339
3V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
5V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200
8V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 510
3VX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
5VX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
8VX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 383
Super HC
®
PowerBand
®
SPB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244
SPC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 378
3V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
5V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241
8V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 579
3VX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
5VX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
12
Predator
®
Singles
SPBP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208
SPCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 377
5VP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198
8VP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 513
AP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
BP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174
CP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324
Predator
®
PowerBand
®
SPBP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 266
SPCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 377
9JP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
15JP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246
3VP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
5VP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217
8VP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 528
BP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212
CP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 332
Hi-Power
®
II
Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168
C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276
D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 554
E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 799
Hi-Power
®
II Powerband
A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200
C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 342
D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 663
Tri-Power
®
AX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
BX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
CX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216
Hi-Power
®
II Dubl-V
AA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
BB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194
CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 354
DD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 750
Quad-Power
®
III
XPZ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
XPA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
XPB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
XPC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245
Quad-Power
®
II
Powerband
XPZ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
XPA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
XPB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 228
Micro-V
®
H . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
J . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
K . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Truflex
®
2L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
4L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
5L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
PoweRated
®
67 (3L) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
68 (4L) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
69 (5L) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
Polyflex
®
3M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
5M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
11M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Polyflex
®
JB
®
3M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
5M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
11M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
13
Belt Installation Tension
Proper belt installation tension is essential in V-belt and synchronous drives for optimum performance and reliability . The correct installation tension for a belt, or set of belts, depends upon the drive geometry and load conditions and must be calculated . Procedures for calculating belt tension are included in the appropriate drive design manual . To determine the belt tension recommended for specific drive applications, either refer to the appropriate belt drive design manual or to the
DesignFlex
®
Pro
™
belt drive selection program located at:
www.gates.com/designflex
DesignFlex
®
Mobile is ideal for use on mobile devices such as phones and tablets with internet access, www.gates.com/DFMobile .
The following belt drive design manuals listed below may be helpful:
Poly Chain
®
GT
®
Carbon
™
Belt Drive Design Manual #17595
Light Power and Precision Drive Design Manual #17183
Industrial V-belt Design Manual #E2-20070
PowerGrip
®
GT
®
3 Belt Drive Design Manual #E2-20099
These catalogs can be downloaded from www.gatesaustralia.com.au/ptcatalogues or contact Gates Application Engineering via gatestech@gates .com .
Tips on Using the Sonic Tension Meter
The Gates Sonic Tension Meter is capable of measuring belt tension with greater accuracy and consistency than traditional methods . It should not, however, be expected to produce exacting results in every case . While numerous factors can be found to influence the accuracy of the meter’s output, one must remember that traditional methods of belt tensioning such as force/deflection or belt elongation are approximate .
The following suggestions are provided to help you achieve a high level of accuracy with the Gates Sonic Tension Meter:
Consistent Readings
• After the correct constants have been entered into the meter, take at least three readings to confirm that results are consistent and the meter is not erroneously reading background noise .
Minimum Belt Span Length
• When measuring the tension in synchronous belts, use spans that are more than 20 times the length of the tooth pitch . Using spans shorter than this may result in readings that are higher than the actual tension due to belt cross-sectional stiffness .
• When measuring the tension in V-belts, use spans that are more than
30 times the belt top width . Using spans shorter than this may result
14
in readings that are higher than the actual tension due to belt crosssectional stiffness .
Minimum Belt Tension
• There are limits as to how low a span tension value the meter can measure depending upon the belt type and cross section . Minimum recommended installation tension values are available for all belt sections from either drive design manuals or Gates Product Application
Engineering . Attempting to measure belt tensions below these minimum recommended values should be avoided, as the meter may display “ERROR” or provide inaccurate results . If the belt span tension is low, and a tension reading cannot be obtained, try increasing the belt tension and then take another reading .
New Belt Installation
• Before measuring belt installation tension, turn the drive over by hand for several revolutions to fully seat the belt and equalize tension in all of the belt spans . Factors such as sprocket/shaft eccentricity, belt/pulley groove irregularity, etc ., can influence belt tension as the sprockets or pulleys rotate . If the measured belt tension changes significantly as the drive is rotated, and accurate measurements are needed, determine the low and high values and average them together .
Windy Environment
• Wind can adversely affect the ability of the meter to make a reading by creating excessive background noise . If measuring in a windy location, the Inductive Sensor should be used instead of a microphone sensor .
Inductive Sensor
• An optional Inductive Sensor should be utilised in noisy or windy environments for optimal results . The Inductive Sensor uses a magnetic field rather than sound waves .
A simple way to use this sensor is with a magnet taped to the backside of the belt . Small “rare earth” magnets provide excellent results with minimal influence on the belt span frequency due to the added weight .
Using Frequency Mode
• If an assembly process is used to set belt tension in a particular application, and the meter is used only to monitor belt installation tensions, the frequency mode can be used rather than displaying an absolute measured tension value . Belt span frequencies for minimum and maximum tension conditions can be measured so assemblers/ technicians can use the meter to verify that belt installation tension is within an acceptable range .
15
Re-calibration for Non-Standard Belts
Measuring the tension of special belts with extra thick backings, alternate materials, etc ., may yield less than accurate results using belt mass constants for standard belts . In these cases, a simple calibration process may be used . The belting can be placed on a fixture with a known span length under various known tensions (hanging weights can be used) . By taking frequency measurements at various tensions, span frequency vs . tension data can be collected .
This data can then be used in a graphical format or in equation form to convert measured span vibration frequencies to accurate belt tensions .
Data of this type is specific to each application and cannot be applied to drives with different span lengths . Because the resulting data may not be linear, it is best to measure the tension of non-standard belts in terms of frequency rather than deriving new belt mass constants to measure in terms of absolute tension .
Summary of Features
• Model 508C - Product No . 7420-0507
• Includes Cord Type Sensor - Product No . 7420-0206 .
• 20 Memory Registers for Belt Constants
• Max Frequency of 5000 Hz
• Auto Microphone Gain Control
• Variable Frequency Range Filters
• Auto Shut Off - The meter will automatically shut off after 5 minutes of inactivity . Power can be shut off manually by pressing and holding the
“POWER” button for 1-2 seconds .
• Batteries - 2 each; AAA . The battery compartment can be found on the backside of the meter .
Optional Accessories
• Flat Flexible Sensor - Product No . 7420-0205
Makes single-handed operation possible .
• Inductive Sensor - Product No . 7420-0212
Recommended for noisy or windy environments . Magnets included .
• Replacement Magnets (set of 10) - Product No . 7420-1212
For use with inductive sensor .
16
Troubleshooting Guide
Symptom Cause
Meter won’t turn on
Batteries are dead
Battery contacts are corroded
To correct
• Replace batteries
• Clean contacts and replace batteries
• Consider meter repair or replacement
Don’t know what reading is correct for belt drive
Meter only measures belt tension
• Determine correct belt tension level using the Design Flex
®
Mobile application
• Determine correct belt tension level using the Design Flex
®
Pro
TM
application
• Determine correct belt tension level using the Design Flex
®
IQ
®
application .
• Determine correct belt tension level from engineering equations in Gates Drive
Design Manuals
• Establish proper belt tension level based on knowledge and experience
All Gates design tools are available at www.gates.com/drivedesign
Don’t know what constants to enter
Mass constant • Mass constants for all Gates belt sections are available on the data card and Users Manual provided with the
Sonic Tension Meter
• The appropriate Mass constant is provided on Design Flex
®
Pro
TM
printouts
Width constant • Width represents the width of synchronous belts in mm or the number of V-belt strands/ribs being measured at once (enter “1” if the tension of only one belt within a set is being measured at a time)
• The appropriate Width constant is provided on Design Flex
®
Pro
TM
printouts
17
Symptom Cause To correct
Span constant • Span represents the length of the belt span being measured in mm
• The appropriate Span constant is provided on Design Flex
®
Pro
TM
printouts
Can’t obtain a belt tension reading
Sensor is too far away from belt surface
• Move sensor as close as possible without interfering with vibrating belt span
Background noise is excessive
• Try using low or high frequency settings to filter our background noise
• Temporarily eliminate noise
• Use Inductive Sensor
Excessive wind is blowing across microphone
Belt is too loose to generate frequency signal
Belt span is long and frequency very low
• Shield or shelter microphone
• Use inductive sensor
• Tighten belt
Incorrect belt constants have been entered
• Tighten belt
• Check to see if calculated belt frequency is below 50 Hz
• Artificially reduce belt span length using a block, etc .
• Use Inductive Sensor for span frequencies from 10 – 50 Hz
• Use correct mass, width, and span constants for drive
• Press “SELECT” to toggle through data memory registers
• Confirm sensor damage and replace Sensor or connections have been damaged
Meter is set in wrong frequency range
• Hold the “0” button down for 2 sec and select standard, or appropriate frequency range
18
Symptom Cause
Iron or magnet is not present with Inductive
Sensor
To correct
• Tape a small magnet to the belt at mid span for the inductive sensor to read
(furnished with Inductive Sensor)
Can’t see belt span frequency on display
Meter is set in the wrong display mode
• Press “Hz” to display belt span frequency
• Press “Hz” again to display both belt span frequency and tension
Meter displays “ERROR” when taking tension readings and red light illuminates
Belt tension reading is outside of meter display capability
• Confirm that correct mass, width, and span constants have been entered
• Press “SELECT” to toggle through data memory registers
• Non-zero constants must be entered even with the meter in the frequency only mode
• Take another tension reading An error has been made in reading the belt tension
Belt is too loose to generate frequency signal
• Tighten belt
Multiple belt tension readings are significantly different
Belt tension is near absolute minimum threshold
• Tighten belt and see if reading variation is reduced
Some tension reading variation is normal
• It is normal for the meter to detect slightly different fundamental span frequencies
• Take at least three tension readings and average the results
19
Symptom Cause
The drive has been rotated between readings
To Correct
• Belts need to fully seat on pulleys and equalise in all belt spans for tension to stabilise
• Pulley/shaft eccentricity can change belt tension significantly; establish minimum/ average/maximum tension level limits and set belt tension accordingly
Meter displays tension in wrong units
Meter is set in incorrect unit mode
• With the meter powered off, press “0” and “9” and “POWER” at the same time and then select the desired display unit
(N/kg/lb) by pressing “SELECT”
Meter readings seem incorrect
Incorrect belt constants may have been entered
• Use correct mass, width, and span constants for drive
• Press “SELECT” to toggle through data memory registers
The tension of a non-Gates belt is being measured
• Mass constants for non-Gates belts have to be derived experimentally
An unrelated competing frequency signal may be picked up
Batteries are excessively weak
Non-alkaline type batteries are being used
• Temporarily eliminate noise
• Try using low or high frequency settings to filter our background noise
• Use Inductive Sensor
• Check battery strength meter on display
• Replace exhausted batteries with fresh ones as needed
• Use only alkaline type batteries for full
1 .5 voltage required by meter
20
Symptom Cause
Meter accuracy can be checked
To Correct
• Generate an accurate frequency signal for the meter to read using a tuning fork
• Generate an accurate frequency signal for the meter to read using a laboratory signal generator
• Send meter to Gates for evaluation
(for a fee)
The belt span length may be too short
• The minimum span length recommended for synchronous belts is
20X the belt pitch
• The minimum span length recommended for V-type belts is 30X the belt or rib top width
Meter battery life is short
Meter usage is heavy
• Fresh alkaline batteries provide approximately 20 – 24 hours of continuous meter usage
Non-alkaline type batteries are being used
• Use only alkaline type batteries for full
1 .5 voltage required by meter
Need extra magnets to use with inductive sensor
Lost original magnets
• Replacement magnets (set of 10) are available through authorised Gates distributors .
Product No . 7420-1212
21
Unit Conversion Formulas
lb lb f f
x 4 .4482 = N
x 0 .4536 = kg f
N x 0 .2248 = lb
kg
N x 0 .1020 = kg f
kg f f f x 9 .8067 = N x 2 .2046 = lb f lb kg f f
= Pounds force
N = Newtons force
= Kilograms force
Inches x 25 .4000 = mm mm x 0 .0394 = inches mm = millimeters
Span Length Formula
Where:
S = Span Length (mm)
CD = Center Distance (mm)
D = Large Pulley Diameter (mm)
d = Small Pulley Diameter (mm)
22
Warranty, Service, and Certification
Gates warrants the meter to successfully operate for a period of two years from the date of manufacture:
• Gates will repair or replace meters, at our discretion, at no charge within the warranty period .
• Sensors are not warranted .
• Meters damaged by misuses or abuse, at Gates discretion, are not covered by the warranty .
For repairs outside of the warranty period, Gates offers a meter repair service:
• Repair estimates are available before work is completed, but Gates must evaluate the meters in-house .
Meter accuracy certification (traceable) is available:
• Upon certification, meters will be returned with a sticker and certificate verifying accuracy .
• Meter certification is not covered under the warranty . Contact an authorised Gates distributor for the current certification rates .
In order to return meters for warranty repair, non-warranty repair, or accuracy verification:
• Contact an authorised Gates distributor for assistance .
• Do not return meters to Gates without prior approval .
• Gates takes no responsibility for any meters returned to the wrong address or without an RMA issued by a Gates authorised distributor .
• www.GatesDistributorLocator.com.au
23
Notes
24
Notes
25
www .GatesAustralia .com .au/508C www .GatesAustralia .com .au/PTMaintenance
For technical information on Model 508C:
Phone: +61 3 9797 9666 • Fax: +61 3 9797 9600 • E-mail: gatestech@gates .com
Gates Australia Pty Ltd
1-15 Hydrive Close • Dandenong South, VIC 3175
496-3025 09/13

Public link updated
The public link to your chat has been updated.
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Key features
- 20 Memory Registers for Belt Constants
- Max Frequency of 5000 Hz
- Auto Microphone Gain Control
- Variable Frequency Range Filters
- Auto Shut Off