Checkline PK2X - Manual (Page 6)

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4.0 CHARGING THE BATTERY (B ATTERY MODELS ONLY )
Charge the battery before first use or whenever the Low Battery Indicator is shown.
The Low Batter Indicator can be flashing on/off or remain on, with the following
explanation for each condition:
LO BAT continuously lit - Approximately 6 minutes of operating time remain
LO BAT flashing on/off - Operation will stop momentarily
Plug the Charger/AC-Adapter into and appropriate AC output, selecting and installing
the appropriate plug adapter for the country of use (N. America, Europe, UK and
Australia plug-in adapter provided). Refer to Charger Set-up below. Plug the other end
of the charger (A) into the DC-Input receptacle located in the bottom of the handle on
the strobe housing (refer to Section 3.1, page 4)
After insertion into the AC power outlet, the Red LED will turn on (upper left side of
the charger housing) indicating that the AC-Adapter/Charger is powered and operating
properly. The battery will now be in the process of recharging. A full recharge cycle
will take about 4-5 hours. There is no specific indication when charging is completed,
however you can not overcharge the battery.
NOTE: It is safe to operate the strobe while it is plugged into the charger.
If the strobe is operated while being recharged, the complete charging cycle will be
extended beyond the typical 4-5 hours, as most of the power is being used to operate
the strobe and only a small portion is being used to recharge the battery.
4.1 Battery Charger (AC-Adapter) Set-up
When first using the battery charger, select the appropriate plug connector for
use in the AC power outlet (several styles provided) and align the holes in the
rear side of the plug connector “B” with the pins in the receptacle in the battery
charger body “C” and push. When properly seated, you will hear a click and the
plug connector will not move. The charger is now ready for use.
To Change the Plug Connector
To remove the connector
from the battery charger,
slide the switch on the
battery charger “D” up and
the connector will pop out.
To insert a different plug
connector follow the
procedures described in
Battery Charger Setup.
B B
C
D
A
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Step 2: As the flash rate was lowered, three singular harmonic images were found.
(The first image at 9,600 RPM is rejected because it is a double image).
Point "X" is 7,200, point "Y" is 4,800 and Point "Z" is 3,600.
Step 3: To calculate the true RPM, enter these values into one of the equations
shown on the next page. For this example, we will use equation (6).
RPM = 2AB(A+B)/(A-B)2
= 2x2,400x1,200x(2,400+1,200)/
(2,400-1,200)2
= 14,400
Where A = (X-Y)
= 7,200 - 4,800
= 2,400
And B = (Y-Z)
= 4,800 – 3,600
= 1,200
Therefore, the true speed of the object is 14,400 RPM. To help further illustrate this
point, the figure below shows the harmonic relationship of the four images found in
this example:
If TWO points, “X” and “Y” are
recorded:
(1) *RPM = XY/(X-Y)
(2) *RPM =Sx(Sx+1)(X-Y)
(3) RPM =S (S -1)(X-Y)
(4) *Sx = Y/(X-Y), rounded
(5) Sy = X/(X-Y), rounded
If THREE points, “X,” “Y” and “Z”
are recorded:
(6) *RPM = 2AB(A+B)/(A-B)2
(7) *A= (X-Y)
(8) *B (Y-Z)
Variations of THREE point formulas:
(9) *RPM = 2PS/D2
(10) P = Product, (A*B)
(11) S = Sum, (A+B)
(12) D = Difference, (A-B)
(13) *Sx = 2(Y-Z)/(X+Z-2Y)
(14) Sy = (X-Z)/(X+Z-2Y)
(15) Sz = 2(X-Y)/(X+Z-2Y)
(16) *Sx = 2B/(A-B)
(17) Sy = (A+B)/(A-B)
(18) Sz = 2A/(A-B)
(19) Sx = 2B/D
(20) Sy = S/D
(21) Sz = 2A/D
Depending on the accuracy desired, either two or three harmonic points can be found.
These points are used in one of the following equations:
Formulas for calculating “Out of Range” RPMs.
Harmonic
FPM/RPM
1/4 1/3 1/2 2/3 5/6 1/1
3,600 4,800 7,200 9,600 12,000 14,400