MONARCH INSTRUMENT Nova-Strobe BBL User manual
Nova-Strobe BBL
Basic Battery LED Stroboscope
15 Columbia Drive • Amherst, NH 03031 USA
Phone: (603) 883-3390 • Fax: (603) 886-3300
E-mail: [email protected]
Website: www.monarchinstrument.com
Instruction Manual
SAFEGUARDS AND PRECAUTIONS
1. Read and follow all instrucons in this manual carefully, and retain this manual
for future reference.
2. Do not use this instrument in any manner inconsistent with these operang
instrucons or under any condions that exceed the environmental
specicaons stated.
3. Certain strobe frequencies can trigger epilepc seizures in those prone to that
type of aack.
4. Users should not stare directly at the light source.
5. Prolonged exposure to the light can cause headaches in some people.
6. Objects viewed with this product may appear to be staonary when in fact
they are moving at high speeds. Always keep a safe distance from moving
machinery and do no touch the target.
7. Do not allow liquids or metallic objects to enter the venlaon holes on the
stroboscope as this may cause permanent damage and void the warranty.
8. Do not allow cables extending from unit to come into contact with rotang
machinery, as serious damage to the equipment, or severe personal injury or
death may occur as a result.
9. This instrument may not be safe for use in certain hazardous environments,
and serious personal injury or death could occur as a result of improper use.
Please refer to your facility’s safety program for proper precauons.
10. Nova-Strobe LED units contains nickel metal hydride baeries which must
be disposed of in accordance with Federal, State, & Local Regulaons. Do
not incinerate. Baeries should be shipped to a reclamaon facility for
recovery of the metal and plasc components as the proper method of waste
management. Contact distributor for appropriate product return procedures.
11. This instrument is not user serviceable. For technical assistance, contact
the sales organizaon from which you purchased the product or Monarch
Instrument directly.
In order to comply with EU Direcve 2012/19/EU on
Waste Electrical and Electronic Equipment (WEEE):
This product may contain material which could be
hazardous to human health and the environment. DO NOT
DISPOSE of this product as unsorted municipal waste. This product needs
to be RECYCLED in accordance with local regulaons; contact your local
authories for more informaon. This product may be returnable to your
distributor for recycling; contact the distributor for details.
Monarch Instrument’s Limited Warranty applies.
See www.monarchinstrument.com for details.
Warranty Registraon and Extended Warranty Coverage informaon is available
online at www.monarchinstrument.com.
Monarch Instrument holds the following US trademarks and registraons, all rights
reserved: illumiNova®, Nova-Pro®, Nova-Strobe™, DataChart™, Track-It™.
TABLE OF CONTENTS
1.0 OVERVIEW ..................................................................... 1
1.1 LED Strobe Control Panel ........................................... 1
2.0 GETTING STARTED ......................................................... 1
3.0 LED STROBE OPERATION ............................................... 2
3.1 Adjusng the Flash Rate - RPM .................................. 2
3.1.1 Mulply or Divide By 2....................................... 2
3.2 Adjusng the Flash Duraon (Brightness) .................. 2
3.2.1 Flash Duraon - Degrees .................................... 3
3.2.2 Flash Duraon - Microseconds ........................... 3
3.3 Display Units.............................................................. 4
4.0 BRIGHTNESS................................................................... 4
4.1 Calculang Blur.......................................................... 4
4.2 Degree of Rotaon Adjustment.................................. 5
4.3 Pulse Duraon Adjustment ........................................ 5
5.0 USING THE STROBOSCOPE TO MEASURE RPM............. 6
6.0 BATTERIES ...................................................................... 8
6.1 Low Baery Indicaon ............................................... 8
6.2 Charging the Baeries................................................ 8
6.3 Stroboscope Disposal................................................. 9
7.0 SPECIFICATIONS............................................................. 1 0
8.0 ACCESSORIES ................................................................. 1 1
1
Figure 1 LED Strobe Control Panel
1.0 OVERVIEW
The Nova-Strobe Basic BBL LED
(Light Eming Diode) is a rugged
industrial stroboscope that
provides extremely bright, uniform
light output for performing stop
moon diagnosc inspecon
and RPM measurement. The unit
has a pistol grip with lockable
trigger switch and wrist strap for
comfortable handheld operaon
or it may be mounted on a tripod
using the integral ¼ -20 UNC thread
at the base of the handle.
1.1 LED Strobe Control Panel
The Basic LED Strobe has a two-line alphanumeric liquid crystal display
(LCD) and a 4-key keypad that enables the user to control the operaon
of the unit. Most of the icons in the LCD are not used.
2.0 GETTING STARTED
The BBL is baery powered and has internal rechargeable baeries. The
unit should be charged before use (see secon 6.0). The actual operang
me of the stroboscope depends on the ash pulse width. Narrower ash
widths increase the operang me. Note that the BBL strobe will not
operate from the recharger supplied with the unit.
To turn on the stroboscope, depress and hold the trigger. The trigger may
be locked in posion using the side locking buon. To lock the stroboscope
on, depress the trigger as far as it will go and then press the locking buon.
Once the locking buon is set you may release the trigger and the trigger
will be held in place. To unlock the stroboscope, simply depress the trigger
and then release. 1
2
Note: The unit must power down completely (OFF will be displayed and
then disappear) before unit will power on again. This is normal
operaon. Wait 2 seconds before turning the unit back on.
3.0 LED STROBE OPERATION
3.1 Adjusng the Flash Rate - RPM
The ash rate can be adjusted by turning the knob on the side of the
unit – counter clockwise to increase the ash rate and clockwise to
decrease the ash rate. The knob is rate sensive; the faster you turn
the knob, the greater the change in ash rate. The smallest adjustment
is to add or subtract one from the least signicant (right most) digit on
the display.
3.1.1 Mulply or Divide By 2
The strobe ash rate can be instantly doubled (x2) or halved
(÷2) by pressing the x2 and ÷2 buons (shown right). This
is useful in determining actual rotaonal speed. Refer to
secon 4.0 on speed measurement for more informaon.
Note that if doubling or halving the ash rate will cause the
strobe to exceed its capability, the display will show OVER
or UNDER respecvely and the ash rate will remain at the current
ash value.
3.2 Adjusng the Flash Duraon (Brightness)
The ash duraon (the width of the LED ash) can be adjusted by the
user to be a preset number of degrees of rotaon (DEGS) or a xed
number with in microseconds (uSEC). The result is a more or less bright
image at the expense of less or more image blur. Read secon 4.0 on
Brightness for more detail.
3
3.2.1 Flash Duraon - Degrees
To view or adjust the ash duraon, press the BRIGHT
buon (shown right). The display will show the current
ash duraon in degrees of rotaon – note that there
are 360° in a complete rotaon. The degrees shown
is the amount of rotaon visible during the ash. The
higher the degrees, the brighter the image and the
more apparent the blur. Use the knob to increase or decrease the
ash duraon in degrees of rotaon. Adjusng the degrees will
cause this to be the controlling parameter for pulse width. As the
ash rate increases or decreases, the strobe will adjust the ash
duraon to keep it at the preset number of degrees provided this
does not exceed the strobe specicaons. Press any key other than
BRIGHT to exit or press BRIGHT again to go to MICROSECOND
adjustment.
3.2.2 Flash Duraon - Microseconds
To view or adjust the ash duraon in microseconds,
press the BRIGHT buon again aer viewing degrees or
press the BRIGHT buon twice from normal operaon.
The display will show the current ash duraon in
microseconds (uSECS) – this may be calculated from
phase degrees set above. Use the knob to increase
or decrease the ash duraon in microseconds. Adjusng the
microseconds will cause this to be the controlling parameter for
pulse width. As the ash rate increases or decreases, the strobe
will keep the ash duraon at the preset width in microseconds
provided this does not exceed the strobe specicaons. Press the
BRIGHT buon to exit the ash duraon adjustment.
1.2
DEGS
1234
uSECS
4
3.3 Display Units
The display can show the ash rate in revoluons per minute
(RPM) or per second (RPS or hertz). To switch between display
modes, press the DISPlay buon (shown right). The display
units will toggle at each press (RPM < > RPS).
4.0 BRIGHTNESS
The strobe’s brightness depends on how wide the LED ash pulse is; the
wider the pulse, the brighter the visual output from the LEDs. Since the
strobe is primarily used on reciprocang or rotang targets, there is a
downside to the wider ashes. All strobes work by giving short bursts of
light (the pulse width) at a rapid repeon rate (the ash rate). Strobes
rely on the persistence of the human eye (the ability to remember an
image) and its response to bright light to give an apparent stop moon
image. Imagine a sha rotang at 6000 RPM or one rotaon every 1/100
of a second (10 msec). If the strobe ashes once every 10 msec for a brief
moment, the user sees the ash at the same spot in the rotaon of the
sha and the persistence of the eye remembers this unl the next ash
making the sha appeared to be stopped. As the target is rotang, there
is some movement evident during the strobe ash. The longer the ash
duraon, the more obvious the rotaon is and this increases the blur.
4.1 Calculang Blur
Blur can be calculated. For example, if the sha takes 10 msec to
complete one revoluon and the strobe ash duraon is 100 μsec
(1/100 of a millisecond), the sha will turn:
(ash duraon/me per rotaon) x 360°, which is (.0001/.01) x 360 = 3.6°
So you will see the sha move 3.6°. As the ash pulse widens, you
will see greater degrees of rotaon which results in more blur and a
brighter perceived illuminaon (the LEDs are on longer so the average
light the eyes see is greater). The trade-o is blur versus brightness.
5
One also has to take into account tangenal velocity (rotaonal speed).
The further away the rotang point is from the center axis, the faster
the tangenal velocity and the worse the blur appears to be – it is
always the same number of degrees of rotaon but the physical length
of the blur gets bigger as the point moves faster. The strobe adjusts the
width of the pulse automacally to keep the degree of rotaon visible
constant.
There are two methods of adjusng the ash pulse width, and hence
the brightness and consequently the blur.
4.2 Degree of Rotaon Adjustment
The rst method is to adjust the ash pulse width for degree of rotaon
visible (blur). The user can set this from 0.2 to 14 degrees out of 360.
The higher the seng the brighter the strobe appears to be but the
target is more blurred. Opmal seng to stop moon is 1.8 to 3.6°.
The number of degrees is a proporonal amount and remains constant
as the ash rate increases or decreases. The strobe automacally
calculates how wide the pulse width should be at dierent ash rates
to keep the blur constant – the faster the ash rate the narrower the
pulse width. The pulse width equals: (seng in degrees/360) x (1/ash
rate in Hz).
Thus the blur remains constant no maer what the ash rate*.
4.3 Pulse Duraon Adjustment
The second method is to adjust the ash pulse width to a xed
number of microseconds. Here the user sets the ash pulse width in
microseconds not degrees. As the ash rate increases the pulse width
stays the same and the image will get brighter and more blurred as the
ash width remains constant*. The degree of rotaon visible changes
to keep the pulse width of the ash constant*.
6
*Note: There are two limits maintained by the strobe – the pulse can
never be greater than 3000 μs nor can it exceed 14° of rotaon.
The strobe automacally adjusts these values as the ash rate
is increased or decreased to maintain these limits at all mes.
For example - at a ash rate of 600 ashes per minute 14° of
blur represents a ash pulse width of 3800 μsec. The Strobe will
limit this value to 3000 μsec or 10.8° of rotaon (blur).
5.0 USING THE STROBOSCOPE TO MEASURE RPM
The primary use for a stroboscope is to stop moon for diagnosc inspecon
purposes. However, the stroboscope can be used to measure speed in
RPM/RPS. In order to do this, several factors need to be considered. First,
the object being measured should be visible for all 360° of rotaon (e.g.
the end of a sha). Second, the object should have some unique part on
it, like a bolt, keyway or imperfecon to use as a reference point. If the
object being viewed is perfectly symmetrical, then the user needs to mark
the object with a piece of tape or paint in a single locaon to be used as a
reference point. Look only at the reference point.
If the speed of rotaon is within the range of the stroboscope, start at a
higher ash rate and adjust the ash rate down. At some point, you will
stop the moon with only a single reference point of the object in view.
Note that at a ash rate twice the actual speed of the image you will see
two images (reference points). As you approach the correct speed, you
may see three, four or more images at harmonics of the actual speed. The
rst SINGLE image you see is the true speed. To conrm the true speed,
note the reading and adjust the stroboscope to exactly half this reading, or
just press the ÷2 buon. You should again see a single image which may be
phase shied with respect to the rst image seen.
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