DOTWORKZ D2 COOLDOME, Product Instructions

Page: 29 / 31

Excessive line drop for Wire Gauge and
Distance
Above includes 9 amps @ 12 vdc for D2 Cool Dome typical current draw, with 3 amps for max. camera & accessory draw.
Voltage Drop Equation to Determine Minimum Wire Gauge to be Used on D/C run Between the S ‐ 250 ‐ 12 Power Supply to
D2 Cool Dome.
Vd = voltage drop for 12vdc run (nominal)
D = distance of run (ft)
Vgm = gauge multiplier (vdc drop, per foot)
Vd = D x Vgm
Where we conservatively try to keep the voltage drop under 1.2 vdc over the low voltage direct current run. These multipliers are
approximate, and voltage drop (Vd) is maximum at full 12 amp load at 12 vdc. This voltage drop is under fully loaded condition, when the
cooling unit is engaged, and camera and all accessories are on. Voltage drop will be much less, if the current is not at full load.
Reusable Desiccant Canister
The reusable desiccant canister contains forty grams of silica gel. This will prevent moisture buildup inside the Cool
Dome. Make sure to remove the canister, located below the camera mount, from its packaging before the Cool Dome is put
to use. There is a small window on the canister (white circle). Ensure that the crystals are blue. Occasionally, especially in
humid environments, the canister may need to be serviced. If so, the crystals in the window turn pink, and the silica gel is
saturated with moisture and can be reactivated by being placed in an oven at 300 °F for three hours or until the crystals turn
blue again. The gel can be reactivated virtually an infinite number of times.
Humidity control/ Dessicant cannister should be removed from its foil packaging and secured within enclosure out of the
way. The clear window shown in the white circle should be blue when completely dry.
28