Monarch Instrument Nova-Strobe BA - Manual (Page 5)

3.0 PREP
ARA
TION FOR USE
The Strobe may be hand held or mounted on a tripod or other user supplied bracket using the ¼-20 UNC bushing at the base of the handle.
3.1 Power The BA
AC powered strobe must have its power cord plugged into an
AC outlet (1
15
V
ac or
230 V
ac).
The BB battery-powered strobe has internal rechargeable batteries. The unit should be charged before use (see section 7.2). This model can operate continuously in excess of 55 minutes at 6000 flashes per minute from fully charged batteries. The strobe has a protection feature that prevents the strobe from operating if the battery voltage is low
.
This condition is indicated
by no flash and the display show “LO BA
T”.
At this time the batteries
must
be rechar
ged.
The
actual operating time of the stroboscope depends on the flash rate and duty cycle of operation. Slower flash rates increase the operating time.
4.0 OPERA
TION
To
turn on the stroboscope, depress and hold the trigger
. The trigger may be locked in position using
the side-locking button.
T
o do this while holding the unit in the right hand, depress the trigger as far
as it will go, and then using the thumb press the locking button.
Y
ou may release the trigger and the
trigger will be held in place.
To
release, simply depress the trigger and then release.
When the strobe is powered up, it will begin flashing immediately
. It will remember the last internal
flash rate in FPM. Turn the knob counter clockwise to increase the flash rate and clockwise to decrease it. The knob is velocity sensitive. Turn the knob slowly to have each “click” is equal to 1 FPM. Turning the knob more quickly will adjust the FPM by larger steps. When adjusting flash rate, quickly turn the knob to coarsely change the FPM. Then slowly turn the knob for fine adjustments. Turn slower still for very fine adjustments.
5.0 USING THE STROBOSCOPE TO MEASURE RPM
The primary use for a stroboscope is to stop motion for diagnostic inspection purposes. However the stroboscope can be used to measure speed. In order to do this, several factors need to be considered. First, the object being measured should be visible for all 360° of rotation (e.g. The end of a shaft). Second, the object should have some unique part on it, like a bolt, key way or imperfection to use as a single
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 location to be used as a
reference
point
. Look only at the
reference point
.
If the speed of rotation is within the range of the stroboscope, start at the highest flash rate and adjust the flash rate down.
At some point you will stop the motion with only a single image of the
refer
ence point
(object) in view
. Note that at a flash rate twice the actual speed of the image you will
see two images.
As you approach the correct speed you may see three, four or more images at
harmonics of the actual speed.
The first SINGLE
refer
ence point
you see is the true speed.
To
confirm the true speed, note the reading and adjust the stroboscope to exactly half this reading.
Y
ou
should again see a single
reference point
(which may be phase shifted with respect to the first
image seen).
2
7.0 BA
TTER
Y
POWERED MODEL
ONL
Y
7.1 Low Battery Indication When the batteries are low
, the low battery icon ( ) blinks on the display once per second.
The strobe may still be used for about 5 minutes. When the battery charge is further depleted, the strobe will stop flashing, and “LO BA
T” will be displayed until the strobe is shut of
f.
When
“LO BA
T” is displayed, the unit should be turned of
f and the batteries
must
be rechar
ged before
the unit will operate again.
Do not
leave the unit on once “LO BA
T” is displayed.
7.2 Charging the Batteries The batteries may be rechar
ged at any time.
Y
ou do not need to wait until the low battery
condition is indicated. To
char
ge the battery powered strobe with the rechar
ger:
1.
Release the trigger so the strobe is off. 2.
Plug the recharger cable into the recharger socket (located below the display panel
behind the handle).
3.
Plug the rechar
ger into an
AC mains wall outlet.
CAUTION:
Use of rechargers other than the one supplied (R-5 or R-6) will dam- age the stroboscope and void the warranty
.
The charger will take up to 14 hours to fully charge the batteries. The batteries must be charged to 100% regularly or the batteries will lose capacity
.
W
ARNING:
The unit may be left on to charge overnight, but the unit should not be left on charge indefinitely (more than 36 hours) as this will damage the lead acid batteries.
7.3 Battery Disposal Prior to disposing of the battery-powered strobe, the user must remove the sealed lead acid batteries.
T
o do this, remove the lens, reflector and lamp as detailed in the Lamp Replacement
section. This will expose 4 screws that must be removed so the reflector housing can be dismantled. There are four additional screws in the case half opposite the input and output jacks that must be removed. The case halves can now be separated, exposing the batteries. Remove the cables from the batteries and place tape over the battery terminals to prevent them from shorting.
The batteries should be sent to a recycling center or returned to the factory
.
The
rest of the parts may now be disposed of.
5
Pb
RECYCLE Pbs BA
TTER
Y
DO NOT INCINERA
TE