UNICO G381
UNICO · Model G381
Head: Available with Monocular, Binocular, Dual View or Trinocular Heads. Binocular and Trinocular Heads feature Seidentopf Optical Design with 52 to 75 mm Interpupilary. Distance Adjustment. All Heads rotate 360and lock in-place with a thumbscrew. Coated Optics: All Optics feature the following coatings: Anti-Glare, Color Correction, Anti-Fungal. Eyepiece: Standard with 10X High-Eyepoint Widefield Oculars. Standard Widefield Oculars are also available. FN = 18 mm, optional 20 mm available. Objectives: DIN Standard 4X, 10X, 40XP and 100XR (Oil) Objectives. 40X and 100X. Objectives are "R", or Retractable. 4X = NA 0.10, 10X = NA 0.25, 40X = NA 0.65, 100X = NA 1.25. Nosepiece: 4 Hold Standard. Focal Length: 160 mm. Options. G381-LED: Achromat. G381SP-LED: Semi-Plan. G381PL-LED: Plan Achromat. Magnification: With 10X Eyepieces, Standard Magnification is 40X, 100X, 400X and 1,000X. Stand: Sturdy Cast Metal Frame with unique Polymer Accent Panel, designed to provide stability while dissipating bulb heat. Condenser: Features a Focusable NA 1.25 Abbe Condenser with port for optional Simple Phase Contrast Annulus insertion. Focusable for concentrated or diffuse lighting with rack and pinion movement. Focusing: Smooth, extra-large Graduated Coaxial Coarse and Fine Focus Controls with Tension Adjustment to eliminate stage drift. Adjustable to your personal preferences. Stage: Built-In Graduated Mechanical Stage with Low-Position Coaxial X-Y Controls. Ball Bearing Movement allows for smooth, precise adjustments. Spring Loaded Slide Holder. Stage Size: 142 mm x 132 mm. Range of X-Y Stage Movement: 55 mm x 75 mm. Illumination: LED. Iris Diaphragm: Features Adjustable Iris with Metal Leaf Overlay Design. Electrical: 110V-60 Hz to 240V-50 Hz, Universal Power Supply. The Fuse Rating is 250V 1.5A. UL & CSA Approved electrical parts. Shipping Size: 13.5 in x 10.5 in x 17.5 in (340 mm x 260 mm x 440 mm). Shipping Weight: 18 lbs (8.2kg).
Typical Failure Modes
Compiled for this model from its own documentation and established engineering knowledge for this equipment class - not from a verified service record. Confirm against the manufacturer's service manual.
Uneven or dark illumination
MediumSymptoms: Vignetting, dark edges, uneven brightness across the field.
Root cause: Condenser height/aperture wrong, field diaphragm not centred, nosepiece not clicked in, or dirty optics; lamp/LED aging.
Poor image quality / low contrast
MediumSymptoms: Blurry or low-contrast image.
Root cause: Wrong or missing 0.17 mm cover glass, immersion oil on a dry objective, air bubbles in the oil, or condenser aperture mis-set.
Illuminator lamp / LED failure
MediumSymptoms: No or dim light, will not brighten.
Root cause: Lamp / LED at end of life, or a rheostat / driver fault.
Focus / stage / nosepiece wear
LowSymptoms: Focus slips or binds, stage stiff or slips, nosepiece detent worn.
Root cause: Worn focus clutch or dried stage grease.
Serviceable Parts & Consumables
Serviceable items for this model, compiled from its documentation and engineering knowledge for this equipment class. Service class and relative cost are estimates, not manufacturer figures; no part numbers are given. Confirm intervals and pricing against the manufacturer.
Illuminator lamp / LED module
Class Periodic replacementRel. cost $R&R Fairly easy
Rheostat / illuminator driver
Class Major service partRel. cost $R&R Moderate
Focus mechanism / clutch kit
Class Major service partRel. cost $$R&R Difficult
Objective lens (DIN achromat)
Class Major service partRel. cost $$$R&R Fairly easy
Mains fuse
Class Major service partRel. cost $R&R Fairly easy
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Illuminator lamp / LED module | Periodic replacement | $ | Fairly easy |
| Rheostat / illuminator driver | Major service part | $ | Moderate |
| Focus mechanism / clutch kit | Major service part | $$ | Difficult |
| Objective lens (DIN achromat) | Major service part | $$$ | Fairly easy |
| Mains fuse | Major service part | $ | Fairly easy |
Relative cost: $ lowest · $$$$ highest service-part cost for this equipment class. Not a price.
Troubleshooting Approach
A starting sequence for this model, compiled from its documentation and engineering knowledge for this equipment class. Follow the manufacturer's service documentation for the actual procedure.
Symptom: Dark or uneven field
- Click the nosepiece fully into a detent.
- Set the condenser height and aperture and centre the field diaphragm (Kohler).
- Clean the objective, condenser, eyepieces and collector.
- Check / replace the lamp or LED if dim.
- Re-check across objectives.
Symptom: Blurry image
- Fit a 0.17 mm cover glass, slide right-side up.
- Remove immersion oil from dry objectives; use oil only with oil objectives and clear bubbles.
- Set the condenser aperture.
- Clean all optical surfaces.
- Re-evaluate the image.
Technical Specs
- Height
- 16 in
- Length
- 9.5 in
- Weight
- 14 lbs
- Width
- 7.5 in
Documents & Manuals
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