SKF TKRS 41 User manual
SKF TKRS 41
Instructions for use
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1EN
Safety recommendations................................................................................................................. 2
EC Declaration of conformity ........................................................................................................... 3
1. Complete overview of connections, controls and settings........................................................... 4
2. Technical data........................................................................................................................... 5
3. About these operating instructions............................................................................................ 6
3.1 Conventional representation in this document ...........................................................................................6
3.1.1 Presentation of work instructions......................................................................................................6
4. Scope of delivery ...................................................................................................................... 7
5. Getting started ......................................................................................................................... 7
5.1 Connectors († fig. 1) .......................................................................................................................................7
5.2 Brief description of set-up steps...................................................................................................................7
5.3 Connect trigger ................................................................................................................................................8
6. Operation ................................................................................................................................. 9
6.1 Controls († fig. 1).............................................................................................................................................9
6.2 Display .........................................................................................................................................................9
6.2.1 Overview of adjustable parameters...................................................................................................9
6.2.2 Standard mode († fig. 2) ................................................................................................................. 10
6.2.3 Pro mode († fig. 2) ........................................................................................................................... 13
6.2.4 Laser modes ...................................................................................................................................... 16
6.2.5 Operating mode ................................................................................................................................ 17
6.3 Factory reset ................................................................................................................................................. 17
7. Determining the actual rotational speed of an object............................................................... 18
8. Spare parts ............................................................................................................................ 20
Table of contents
Original instructions
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2 EN
WARNING LASER RADIATION
P
=1mW
l
=
650nm IEC 60825-1:2007
DO NOT STARE INTO BEAM
CLASS 2 LASER PRODUCT
Li-ion
Safety recommendations
This device is used for inspecting the movement of
rotating and vibrating objects. It may only be used in
accordance with these instructions. The device must
not be opened. Modifications to the device are not
permitted. The manufacturer shall not be liable for
damage resulting from incorrect use or use contrary
to the intended use. Warranty claims will also be
invalidated in this event.
WARNING:
Risk of injury!
• Moving objects appear still or in slow motion in
stroboscopic light.
• Do not touch such objects under any
circumstance.
• The device may not be used in potentially
explosive areas.
• Stroboscopic light can trigger epileptic seizures
in persons at risk.
• Never direct the LED beam at people or animals
and do not stare directly at the beam.
• Laser class 2
The SKF Stroboscope TKRS 41 is fitted with
a class 2 laser. This is located at the front of
the device.
The laser beam can damage eyes.
For this reason, do not stare directly at the laser
beam and never direct it at people or animals.
Wavelength: 650 nm, output: 1 mW.
CAUTION:
Flashing lights can cause retina damage!
• The SKF Stroboscope TKRS 41 is fitted
with 118 LEDs.
These produce potentially dangerous optical
radiation, which can cause retina damage.
Do not stare directly at the light and never
direct it at people or animals.
Warranty void!
• Do not expose the equipment to rough handling
or heavy impacts.
• Always read and follow the operating
instructions.
• Opening the housing of the instrument may
result in hazardous mishandling and voids
warranty.
• The equipment should not be used in areas
where there is a risk for explosion.
• Do not expose the equipment to high humidity
or direct contact with water.
• All repair work should be performed by an
SKF repair shop.
Correct disposal!
• =The electronic components in the device
contain environmentally harmful substances.
They must be disposed of in accordance
with the environmental regulations in the
country of use.
NOTE:
• Suitable for use in residential, commercial and
industrial area.
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3EN
EC Declaration of conformity
We, SKF Maintenance Products, Kelvinbaan 16,
3439 MT Nieuwegein, The Netherlands herewith
declare that the products described in these
instructions for use, are in accordance with the
conditions of the following directive:
EMC DIRECTIVE 2014/30/EU and are in conformity
with the following standards:
DIN EN 61326-1:
Electrical equipment for measurement,
control and laboratory use.
EMC requirements.
DIN EN 61010-1:
Safety requirements for electrical equipment for
measurement, control and laboratory use.
DIN EN 60825-1:
Safety of laser products
DIN EN 62471:
Photobiological safety of lamps and lamp
systems
EUROPEAN ROHS DIRECTIVE 2011/65/EU
The laser is classified in accordance with the
EN 60825–1:2007
Nieuwegein, The Netherlands, August 2018
Sébastien David
Manager Product Development and Quality
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4 EN
1. Complete overview of connections,
controls and settings
A. CHARGE = charging socket
B. INPUT = input for external trigger /
24 V power supply for sensors
C. Display
D. Rotary/push knob
E. Selector switch:
OFF, FREQUENCY, BRIGHT, MENU, LASER
1. Brightness in s and/or degrees (BRIGHT)
2. Delay in ms and/or degrees (DELAY)
3. Phase shift (PHASE)
4. Unit of frequency in rpm, Hz and/or FPM
5. Value
6. Multiplier (MULT.)
7. Trigger divider (DIV.)
8. Slow motion (SLOW)
9. Trigger signal edge (TRIG.)
10. Internal/external trigger (INT / EXT)
11. Store / read parameters
(MEMORY IN / MEMORY OUT)
12. Pro mode (P)
13. Battery status – full, half full or low
OFF
FREQUENCY
BRIGHT
MENU
LASER
PRESS: FLASH ON/OFF
Reset 5 sec.CHARGE
INPUT
A
B
E
D
C
Fig.1 – Stroboscope SKF TKRS 41
1 2 3
10 11 12 13
4
5
6
7
8
9
Fig.2 – Display
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5EN
2. Technical data
General parameters TKRS 41
Number of LEDs 118
Frequency range 30 to 300 000 flashes per minute (f/min)
Display Multi-line backlight LCD
Accuracy ±0.02 % (±1 digit / ±0.025 s)
Resolution ± 0.1 (30 to 999.9 f/min)
± 1.0 (1 000 to 9 999 f/min)
± 10 (10 000 to 300 000 f/min)
External trigger input 3 – 30 V / max. 5 mA
(isolated optocoupler)
DIN 41524 5-pin standard connector
Uout = 24 VDC, 60 mA
Flash parameters
Light duration Adjustable, 0.025° – 3.0°
Light intensity ca. 8 000 Lux @ 1° / 300 mm (12 in)
Flash colour approx. 5 000 – 8 000 K
Power supply
Power supply Integrated lithium-ion batteries
Continuous use time ca. 2:30 h @ 0.50° (~4 000 Lux)
ca. 5:00 h @ 0.25° (~2 000 Lux)
Housing
Material Aluminium
Dimensions 150 × 130 × 112 mm (6.0 × 5.1 × 4.4 in)
Weight approx. 1,15 kg (2,53 lb)
Ambient conditions
Temperature 0 to 40 °C (32 to 104 °F)
Type of protection IP30
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6 EN
3. About these operating instructions
These operating instructions are an integral part
of the device. They must be stored in an easily
accessible location and passed on to subsequent
users. Ask your supplier if there is something you do
not understand.
WARNING:
Read the operating instructions thoroughly and
follow the instructions provided. These operating
instructions contain important information about
installing, starting up and operating the stroboscope.
Pay particular attention to the safety information
and warnings to prevent injuries and product
damage.
The manufacturer reserves the right to continue
to develop this device without documenting all
developments. Your supplier will be pleased
to inform you as to whether these operating
instructions are current.
3.1 Conventional representation in
this document
3.1.1 Presentation of work instructions
Work instructions are shown in numbered steps and
must be carried out in the order stated.
1. Step
→An arrow is used to show stroboscope
reactions to a step.
2. Step
3. Step
The end of a work instruction is shown as follows:
þEnd of work instruction
A work instruction that only consists of one single
step will appear as follows:
►Step
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7EN
4. Scope of delivery
Check the scope of delivery.
• Stroboscope:
– portable version TKRS 41 (= 118 LEDs,
with auto-sync laser function)
• Operating instructions
• Charger with connector set
• Trigger plug
• Reflective tapes
• Handle
• Case
5. Getting started
5.1 Connectors (†fig. 1)
No. Marking Term Description
B. INPUT Input socket Input for external trigger /
24 V power supply for sensor
A. CHARGE Charging socket Device is charged using the charger
5.2 Brief description of set-up steps
Please follow the steps below when setting up the
device:
1. Charge the device: plug the charger into the
CHARGE socket (A) to the rear of the device
(†fig. 1).
2.
Direct the device at a moving object and switch
on. Turn the selector switch (E) one notch to the
left to “FREQUENCY”.
The device will start to flash straightaway.
For this reason, do not direct it at people or animals.
• The device will flash at the frequency that was
set most recently.
The display shows the selected flash frequency
in the unit that was set most recently (rpm, Hz
or FPM).
• If the flash frequency coincides with the
frequency of the motion, a static image appears.
NOTE:
Static images are produced when the flash
frequency is identical to, or a multiple or fraction
of the frequency of the motion (†section 7 –
“Determining the actual rotational speed of an
object”).
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8 EN
5.3 Connect trigger
The device has the option of being externally
triggered.
CAUTION:
Material damage!
Do not trigger the device with signals in excess of
300,000 FPM.
NOTE:
Only use original material from the manufacturer to
connect the trigger signal.
The trigger input is isolated. The isolated input is
suitable for PNP and NPN signals. A trigger plug
suitable for this input socket is included with the
device.
1. Plug the trigger plug into input socket
INPUT (B).
2. Screw in trigger plug.
3. Assign the connection socket as per fig. 3.
DIN 41 524
(EN 60130-9)
1
42 5
3
Fig.3 – Assignment of the connection socket
1 +24V
2 nc
3 GND
4 +Trigger
5 -Trigger
NOTE:
The device must be manually switched
between external and internal trigger signals
(†section 6.2.2 – “Standard mode / How to select
an internal / external trigger”).
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9EN
6. Operation
NOTE:
Please note that this device is available in standard
and pro modes (†section 6.2.2 – “Standard mode”
and †section 6.2.3 – “Pro mode”).
6.1 Controls (†fig. 1)
No. Term Description
D. Rotary/push
Knob
– Turn the knob to select the value and push to confirm.
The adjustment increment depends on the rotational speed.
– Turning the knob while pushing it simultaneously, the adjustment increment is effected in
steps of 100.
– The flash can be turned off by pushing the knob once and turned on again by pushing the
knob once again.
E. Selector
switch
Choose between “OFF”, “FREQUENCY”, “BRIGHT”, “MENU” and “LASER” by turning the
switch to the desired position.
6.2 Display
NOTE:
Preset values are retained in each mode
(standard or pro mode)!
6.2.1 Overview of adjustable parameters
Position of the
selector switch
(E)
Display Available with Functions of the rotary/push knob (D)
Internal
trigger
External
trigger
Set value Select parameter
OFF –
FREQUENCY FPM •
BRIGHT BRIGHT deg •
MENU PHASE deg • • •
INT / EXT • • •
Following functions are only available in the PRO mode:
1/min / Hz / FPM • • •
MULT. • •
BRIGHT deg / s • •
DELAY ms • • •
DIV • •
SLOW • •
TRIG. • •
MEM IN • • •
MEM OUT • • •
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10 EN
6.2.2 Standard mode (†fig. 2)
NOTE:
Not all of the settings shown in fig. 2 are available in
standard mode.
No. Position of the
selector switch (E)
Display Adjustable
parameters
Description
OFF – Device is switched off
4. FREQUENCY FPM Frequency selection:
FPM: flashes per minute
– Turning the knob while
pushing it simultaneously,
the adjustment increment is
effected in steps of 100.
– The flash can be turned off by
pushing the knob once and
turned on again by pushing the
knob once again.
How to select frequency:
1. Turn the selector switch (E) to the “FREQUENCY” position.
→ The following will then appear in the display for a few seconds:
•all settings followed by
•“S” for standard mode
→ The following will then appear in the display:
2.
Select the desired frequency using the
rotary/push knob (D).
þThis setting is now active.
1. BRIGHT BRIGHT deg Selection of brightness
(in 1/1,000 degrees)
Brightness (BRIGHT in deg)
Flash duration. This function allows the flash duration to be adjusted, which influences the brightness and focus of the
object being viewed. In the standard mode, this setting can only be made in relative form (degrees), whereas the pro
mode also features the additional setting of measuring brightness in absolute form (microseconds).
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11EN
No. Position of the
selector switch (E)
Display Adjustable
parameters
Description
3. MENU PHASE deg.:
0 … 359
Delay setting between the trigger
signal and flash (in degrees,
relative to the frequency)
Position fixed; actual delay
depending on current frequency.
Phase shift (PHASE in deg)
Phase shift setting (in degrees, relative to the frequency) between the trigger signal and flash. This value allows a fixed
angle to be set between the trigger signal and flash.
•Example without external connection: The viewing position can be extremely precisely adjusted without
changing the flash frequency. You can shift the viewing position within a movement cycle.
•Example with external connection: The external trigger signal is triggered before the desired observation point
(= flash position of the stroboscope). This would mean that the connected stroboscope would regularly flash too
early. The PHASE deg setting adjusts the delay, altering the flash position of the stroboscope by a set angle.
This setting is not affected by the current rotational speed, which means that the stroboscope will flash at the
desired position even during rotational speed fluctuations or during the start-up period.
How to select in the MENU:
1Turn the selector switch (E) to the “MENU” position.
2. Select which parameter (e.g. PHASE deg) you want to change using the rotary/push knob (D).
3. Push the rotary/push knob (D) to confirm a parameter selection.
→ The following will appear in the display:
→ the number display will flash
4Select the desired value using the rotary/push knob (D).
5. Confirm and exit selection by pushing the rotary/push knob (D).
þThis setting is now active.
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12 EN
No. Position of the
selector switch (E)
Display Adjustable
parameters
Description
10. MENU INT / EXT Internal / external trigger
How to select an internal / external trigger:
1. Turn the selector switch (E) to the “MENU” position.
2. Select the INT / EXT parameter using the rotary/push knob (D).
3. Push the rotary/push knob (D) to confirm a parameter selection.
→ The display will now show the selection of INT and EXT parameters:
→ the active setting will flash
4. Select the desired parameter using the rotary/push knob (D).
5. Confirm and exit selection by pushing the rotary/push knob (D).
þThis setting is now active.
NOTE:
The display and adjustable value can be changed by
turning the rotary/push knob (D).
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13EN
6.2.3 Pro mode (†fig. 2)
NOTE:
Follow the steps below to access the pro mode:
►Turn the selector switch (E) from “OFF” to
the required position whilst simultaneously
holding the rotary/push knob (D) until the “Pro”
notification appears in the display.
þThe following will then appear in the display:
“Pro” for pro mode.
No. Position of the
selector switch (E)
Display Adjustable
parameters
Description
OFF – Device is switched off
4. FREQUENCY FPM Frequency selection:
FPM: flashes per minute
– Turning the knob while
pushing it simultaneously,
the adjustment increment is
effected in steps of 100.
– The flash can be turned off by
pushing the knob once and
turned on again by pushing the
knob once again.
1. BRIGHT BRIGHT deg.:
0.025° ... 3,000°
BRIGHT s:
1 ... 2,000 s
Selection of brightness
(in 1/1,000 degrees)
Selection of brightness unit in
degrees (displayed in 1/1,000
degrees) or in microseconds.
3. MENU PHASE deg.:
0 … 359
Delay setting between the trigger
signal and flash (in degrees,
relative to the frequency)
Position fixed; actual delay
depending on current frequency.
10. MENU INT / EXT Internal / external trigger
NOTE:
If pro mode is activated, a “P” will be shown in the
bottom right area of the display.
NOTE:
If you have selected settings in pro mode and then
switch the device off, these settings will ONLY be
active when the device is switched back on if pro
mode is activated. Otherwise, only the standard
mode settings will be active.
NOTE:
†section 6.2.2 – “Standard mode” for examples and
explanations regarding above mentioned display
messages.
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14 EN
No. Position of the
selector switch (E)
Display Adjustable
parameters
Description
4. MENU rpm / Hz / FPM Unit of frequency selection:
– rpm: unit for measuring
rotational speed
– Hz: flash frequency per second
– FPM: flashes per minute
6. MENU MULT:
x 1, x 2, x 3, ... /
÷1, ÷2, ÷3, …
respectively.
The selected
flash frequency
is immediately
multiplied/
divided by
1, 2, 3...
Multiplier:
– This function is only possible
when the “internal trigger” is
selected.
Multiplier (MULT.)
At this function the adjusted frequency can be divided or multiplied with integer values to check the harmonic multiple
images (†section 9 – “Determining the actual rotational speed of an object”).
1. MENU BRIGHT:
PULSE deg /
PULSE s
Selection of brightness unit (in
degrees or microseconds).
Brightness (BRIGHT in deg / BRIGHT in s)
Flash duration. This function allows the flash duration to be adjusted, which influences the brightness and focus
of the object being viewed. Brightness can either be measured in absolute terms (microseconds) or in relative
terms (degrees).
2. MENU DELAY ms:
0,0 … 2,000
Delay time setting (in
milliseconds) between the trigger
signal and flash.
Position fixed; actual delay
depending on current frequency.
7. MENU DIV:
1 … 255
Pulse divider,
max. value 255
– This function is only possible
when the “external trigger” is
selected.
Pulse divider (DIV)
The pulse divider can be used to set a value x, by which the external trigger signal is then divided.
Example: when scanning a cog wheel, an external trigger (e.g. rotational speed sensor) sends out a signal for each cog
scanned. With a DIV value of 10, it will only flash once in every 10 signals.
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15EN
No. Position of the
selector switch (E)
Display Adjustable
parameters
Description
8. MENU SLOW:
0 … 600
– The flash frequency exceeds
the trigger frequency by the
value selected.
– This function is only possible
when the “external trigger” is
selected.
SLOW (slow motion)
The “SLOW” function allows the viewer to view movement in slow motion.
The speed of the slow motion depends on the flash frequency and corresponds to
the value selected.
10. MENU TRIG.
0 / 1
Selection of trigger signal edge
(increasing: 0, decreasing: 1).
– This function is only possible
when the “external trigger” is
selected.
11. MENU MEM IN:
1 … 5
Selected settings can be backed
up in five separate storage
locations.
11. MENU MEM OUT :
1 … 5
It is possible to read backed-up
settings.
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16 EN
6.2.4 Laser modes
NOTE:
The stroboscope TKRS 41 features both a higher
number of LEDs as well as a laser.
WARNING:
Risk of injury!
• Laser class 2
The stroboscope TKRS 41 is fitted with a class 2
laser. The laser beam can damage eyes. For this
reason, do not stare directly at the laser beam
and never direct it at people or animals.
No. Position of the
selector switch (E)
Display Description
LASER The trigger frequency is 3,000 flashes per minute,
determined by the reflective laser beam.
LASER The trigger frequency is below the
measurement range.
LASER The trigger frequency is above the
measurement range.
The stroboscope TKRS 41 features a laser
in addition to the aforementioned settings
(†section 6.2.2 – and 6.2.3).
To use the laser, you must first affix a reflective
marking onto the object to be measured. Direct the
stroboscope at the rotating object. The laser will
recognise the marking and measure the rotations.
To enable the integrated “Auto Save” feature, direct
the stroboscope at the rotating object for at least
2 seconds. The measured frequency will be stored.
After switching to the parameter “Internal trigger”,
the stroboscope flashes at this frequency and it can
now be used for all other settings.
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17EN
6.2.5 Operating mode
The following operating modes may be displayed:
No. Position of the
selector switch (E)
Display Description
BATTERY STATUS Fully charged
BATTERY STATUS Half charged
BATTERY STATUS Low (symbol will flash)
LASER / EXT /
SLOW
The trigger frequency is below the
measurement range.
LASER / EXT /
SLOW
The trigger frequency is above the
measurement range.
NOTE:
The symbol of a parameter that differs from the
factory settings will flash during operation.
NOTE:
The stroboscope will be automatically switched off
after 15 minutes of running on battery power!
6.3 Factory reset
NOTE:
To reset the factory settings, press and hold the
rotary/push knob (D) for at least 5 seconds.
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18 EN
7. Determining the actual rotational
speed of an object
The stroboscope can be used as a digital revolution
indicator to determine an object’s actual rotational
speed and/or the frequency of cyclical movements.
The stroboscope does this by visually “freezing” the
object’s movement and then taking a reading of the
rotational speed or frequency from the LCD display.
As is the case with all stroboscopes, it is vital to
ensure that this “frozen” image is not a harmonic of
the object’s actual rotational speed.
Example 1 (marking required):
This example shows the importance of using identification markings. Say you want to determine the actual
rotational speed of this ventilator.
The only thing you know is that its rotational speed is less than 3,500 rpm. The following “frozen” images will appear if
you reduce the flashing rate based on 3,500 FPM (flashes per minute):
Image No. 1 2 3 4
Flashing rate 3,300 2,200 1,650 1,320
Image No. 5 6 7 8
Flashing rate 1,100 825 733,3 550
What is the actual rotational speed of the fan?
Images 1, 3, 5, 6 and 8 correspond to the original one, which means the rotational speed could be 3,300, 1,650,
1,100, 825 or 550 rpm.
Useful information:
•
It’s helpful to have a rough idea of the object’s
rotational speed beforehand.
• Regular shaped objects, e.g. a fan with several
vanes or a motor shaft, must be affixed with
an identification marking (using colour or
a reflective strip etc.) in order to be able to
differentiate its orientation of movement.
• A still image always appears exactly at integer
division of the speed of the object’s actual
rotational speed!
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