Monarch Instrument Nova Strobe DB Plus - Manual (Page 7)

In addition to the knob, there are two buttons on the back panel marked x2 and ÷2. This
enables the user to instantly double or halve the reading on the display to the maximum or
minimum values allowed. This feature is useful for checking harmonics in the internal
flashing mode.
The Preset button will cycle through six different preset flash rates. These rates are set at the
factory to be: 100, 500, 1000, 3600, 7200 and 14000 FPM. Each time the Preset button is
pressed, the flash rate and display is changed to the next preset flash rate. The user can
change the presets by turning the knob and then pressing the Store button. The Store button
stores the current flash rate into the last preset location the user has viewed.
Once the flash rate has been adjusted to give a stopped motion image, the Phase + and
Phase - buttons may be used to increase or decrease the phase of the image. Press and hold
the Phase + button to have the image appear to slowing rotate in the direction the object is
actually rotating. Press and hold the Phase - button to rotate the image in the opposite direction
the object is actually rotating. Use the phase buttons to bring a reference mark, such as a key
way, into your line of sight. You can then use the Store button to store the current flash rate
into the last preset location viewed.
3.2 External Mode - External Input Required
The strobe is in the External Mode whenever there is a plug in the input jack. The External
chevron comes on automatically to indicate this mode.
In the External Mode there are no flash rate adjustments the user can make. The flash rate is
a function of the input signal. This mode is used to synchronize the flash to an external event
(for example, from an optical sensor) to stop or freeze motion. The flash will be triggered on
the rising edge of the external input pulse. The Alt Function mode and chevron is automatically
set in this mode, since the primary function of the buttons have no use in this mode.
3.3 Common Features for Both Internal and External Modes
The Alt Function button toggles the Alt Function chevron on and off. When the Alt Function
chevron is on, the buttons will perform their secondary function listed in the white section of
each button. The Alt Function also changes how the tuning knob works.
Below are all the Alternate functions of each button:
The Battery button (Battery powered model only) will display the current battery charge level
from 0 to 100% for about 2 seconds. When the strobe is not flashing, this number represents
the percentage of usable charge left in the batteries. When the strobe is flashing, this number
will be lower. It will decrease with increasing flash rates. This gives the user an indication of
how much quicker the batteries will be discharged at a given flash rate.
The Tach button toggles the Tach chevron on and off. When the chevron is on, the strobe is
inhibited from flashing. When using an external sensor or input trigger, the strobe will be in the
External Mode. The strobe can be used as a tachometer without having the strobe flash. In the
Internal Mode, the strobe can be used as a frequency generator (outputting TTL pulses)
without having the strobe flash.
When the Alt Function chevron is turned on, the current flash rate is used as an adder. As
long as the Alt Function chevron remains on, the knob will add (counter clockwise) or subtract
(clockwise) the initial flash rate for each “click” the knob is turned. This in effect allows the
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WARNING: Do NOT touch the new lamp with bare fingers.
3. The lamps are polarized and must be put into the socket matching polarity. Using a lint
free cloth, match up the red dot on the plug with the red dot on the socket and
gently rock the lamp back and forth while pushing it into place (see Figure 6). Make sure
the lamp is in straight and centered in the reflector hole.
CAUTION: Do NOT allow the reflector to contact the lamp.
4. Reinstall the reflector and then position the front lens in place matching up the notches on
the lens with the two small tabs on the housing to prevent lens rotation (see Figure 6).
Push the tabs on the front rim outward and press the lens into place.
5.2 Fuse Replacement
There is a 5 x 20mm fuse inside the unit which may be accessed by removing the lens and
reflector (refer to section 5.1). Under normal operating conditions, the fuse should never blow.
Examples of abnormal operating conditions would be foreign materials entering the strobe,
such as water, ink, etc. If the fuse needs to be replaced, replace only with a fuse of the same
type and value:
Battery Powered: Slow Blow - 3.15A fuse (part# 1062-3004-001)
AC Powered: Fast Blow - 750mA fuse (part# 1062-0201-001)
Figure 6 Lamp Replacement
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Red Dots
Notches