05/03/08

VCL4500-C-Dual-Dim-110V Model Shown

• Complete Variable Contrast Control from
  Grade 0 to Grade 5 with 50 Settings
  Over Entire Range without Using Filters

• Low Power Consumption
• Fast Consistent Exposures
• Maybe Used with Any Timer

Light Head (2 lamps High Intensity)

• Size: 7 11/16 L x  7 11/16 W x  4 5/16 H
• Weight: 3.3 lbs.
• Secondary Cable: 6'
• Heater: Adjustable Thermostat Controller
• Power Supply: 120 VAC, 60 Hz, 195 Watts
• Fuse: AGC 3 amp
• Size: 8" L  x  8" W  x 3.75" H
• Weight: 10.2 lbs.
• Primary Cord: 6' Long, 3-Prong Grounded
• Relay: Built-in with 6' 2-Line Cord for Timer Connection

Caution: The lamps do generate moderate amounts of heat on their own. Excessive on time can cause light loss. This is a temporary condition. When turned off and allowed to cool to the thermostat setting (95°F on the top of the lamp head) the light level will increase and return to normal. Repeat overheating will degrade the light output faster than normal and shorten lamp life. Proper work habits are important and will insure consistency.

• #6 in ON position, #4 provides;
  Blue Max: = blue only at maximum brightness
  Blue/Off: = blue only with fully adjustable brightness control
  Green/Blue: = Green and blue combined with blue intensity being fully adjustable
• #6 in OFF position, #4 provides;
  Blue Max: = blue only at maximum brightness
  Blue/Off: = off only
  Green/Blue: = Green only, no blue

Note: For printing without timer, cold light may be turned on and off by plugging two line cord directly into a 110Vac outlet with an ON/OFF switch Capability.

• The LED numerical display is not meant to represent each exact paper grade when dialing up from 0 toward 5.
  
  With switch No. 6 in the ON position and switch No. 4 in the green and blue color mode, you can dial in any contrast.
  
  The minimum brightness level of the blue lamp is set at the factory to provide and approximate minus 0 starting point with the display at 0.0.
  
  This can be manually re-adjusted according to what brand of paper you are using.
  Re-adjusting of No. 7 only effects the starting point and not the maximum brightness of the blue lamp.
  
  High contrast is obtained with the LED set at 5.0 and printing times may have to be reduced by 50% from mid range settings.
  
  Switching to the maximum blue or blue adjustable position will print extra hard and yield an approximate grade 5.5 depending on the paper and chemistry used.
   
• For split printing on variable contrast papers, switch No. 6 should be in the OFF position. It is then simply a matte of selecting BLUE ONLY or GREEN ONLY from switch No. 4.
  
  For printing on graded papers switch No. 6 should be used in the ON position.
  
  Graded papers primarily like the blue energy spectrum. You can now select maximum blue, blue with adjustable intensity or blue and green combined. In the blue adjustable position you can set the intensity level to control printing speeds or adjust for dry down time. You can also print with blue and green combined and may find it possible on some papers to achieve plus or minus a half grade by adjusting the blue green ratio.
  
  The thermostatically controlled heater is preset at the factory for average room temperature (70°F). Should your darkroom be above or below average or have wide temperature swings because of heating or air conditioning ducts close by, you may need to readjust. See the thermostat adjustment sheet.

  Familiarize yourself with the function and location of the controls shown in the product specification sheet.

Optional Bracket for the Omega D Series Enlargers

Wiring Diagram

Caution:
Instructions are for guidance only.
Aristo/Voltarc will not be responsible for any damage to lamp
or lamp housing for items improperly installed.