• Plug thermo cord into the nearest available 115V outlet.
• Turn on the thermo-switch on the side of your Aristo unit. Allow unit to warm up for about 5 minutes prior to making your first exposure.
• The plug out of the power pack is plugged into your timer ( 3-prong). Turn switch to "on" position.
• Leave slack on the cords coming out of the lamp housing to avoid lifting of the unit when enlarger is raised or lowered.

Thermostat Control

This feature is incorporated in all Aristo units. Thermo control maintains a continuous ambient warmth around the lamp insuring peak brightness at each start when operated through a timer or footswitch. Turn on your thermo switch or plug in your thermo cord and allow your unit to warm up for about 5-10 minutes before making any exposure.

To help speed up this warm-up period, the lamp may be turned on at the same time for about 3 minutes, then shut off. The unit is now ready to operate efficiently. The thermo control should be left on continuously for the duration of any day or working session.

Processing Recommendations:

• Negatives: Develop negatives 20-30% longer than recommended for normal. This becomes the "Normal" negative for cold light printing
• Paper: Expose paper so that full development time can be given. This will produce prints of good contrast and maximum quality, maintaining a full tonal range from the whitest highlights to the deepest blacks.
• Maintenance and Care: Clean your unit periodically. With a damp cloth wipe your lamp, reflector and diffusion plate of dust and dirt which may accumulate. Keeping the until clean will help maintain optimum evenness, speed and contrast.

Adjusting the Projected Image Size:

Adjust the projected image size you want by raising or lowering the enlarger head; the higher the head, the larger the image. For rapid adjustment turn the inner milled knob to unlock the movement. Then grip this knob together with the knob on the opposite side to raise or lower the enlarger head rapidly to required level. After locking the inner milled knob turned the outer milled knob for fine adjustment.