Domain: Engineering — Instrument and Meter Engineering
Target concept: Diaphragm Micrometer

Video generation prompt: Connect the positive pressure port of the diaphragm manometer (range 0-2000 Pa) to compressed air, and the negative pressure port to atmosphere. Slowly adjust the air pressure regulator to increase the pressure, and align the lens with the scale ruler and float of the manometer.

Evaluation guide:
(i) Target concept: Visual verification of calibrated pressure-induced float displacement in a diaphragm manometer under controlled positive-pressure application, with optical alignment enabling accurate reading.
Minimum mechanism: Diaphragm must be elastic and sealed; float must be buoyant and constrained to vertical travel; scale must be fixed and linearly graduated in Pa; lens must have finite depth of field requiring precise alignment for dual-focus.
(ii)Storyline: Frame 1–2: Static setup: manometer upright, ports connected/open, lens positioned. Frame 3–5: Regulator begins turning: visible rotation or knob displacement. Frame 6–8: Float initiates upward motion: first discernible displacement from zero. Frame 9–10: Float stabilizes at new position aligned with higher Pa value; lens, scale, and float remain mutually sharp and co-planar. Perspective: Fixed frontal view, centered on manometer face; no camera motion; full manometer body, scale, float, lens, and regulator visible in frame at all times.

Manual:
Experimental Procedure
1. Mount diaphragm manometer (0–2000 Pa) upright. Connect positive pressure port to compressed air source via regulator. Leave negative pressure port open to atmosphere.
2. Position lens to optically align with scale ruler and float.
3. Slowly turn regulator to increase air pressure.
Observation of Experimental Phenomena
Float rises continuously along vertical scale ruler; scale displays increasing Pa values; lens keeps both float edge and scale graduations simultaneously sharp.
Summary of Experimental Principles
Diaphragm manometer measures differential pressure via elastic deformation. Positive pressure deforms diaphragm, displacing float proportionally. Alignment ensures accurate parallax-free reading.

Prompt Grounding rubric:
level_1: No diaphragm manometer visible; no compressed air source shown; no pressure regulator present; no scale ruler or float visible; no alignment between lens and scale/float observed; none of the three ports (positive, negative, atmosphere) are identifiable.
level_2: Diaphragm manometer is present but incorrectly oriented (e.g., lying flat, inverted, or obscured); at least one port is labeled or implied, but positive pressure port is not connected to a visible compressed air source; negative pressure port is not exposed to ambient atmosphere (e.g., capped, sealed, or connected to another device); scale ruler and float exist but lens is absent or mispositioned (not in line-of-sight with both).
level_3: Diaphragm manometer is upright and correctly oriented; positive pressure port is visibly connected to a compressed air source (e.g., tube/hose leading from regulator or tank); negative pressure port is openly exposed to ambient space (no cap, no secondary connection); scale ruler and float are both fully visible; lens is present in frame and positioned such that its optical axis passes through both scale ruler and float; all three elements (lens, scale, float) appear in same visual plane and share approximate centerline alignment.
level_4: All conditions for score 3 are satisfied, AND the pressure regulator is visible and clearly adjustable (e.g., knob or dial shown, not just a static pipe); the connection between regulator and positive port is continuous and unbroken (no disconnected hose ends or floating connectors); lens is stationary during observation phase (no visible movement or refocusing); float is centered on scale ruler in the final frame, and scale ruler is vertically oriented without tilt.
level_5: All conditions for score 4 are satisfied, AND the compressed air source is explicitly identifiable as a regulated supply (e.g., labeled “compressed air” or showing a pressure gauge upstream); the negative pressure port is visibly open to unrestricted ambient environment (no walls, enclosures, or airflow obstructions within immediate field of view); lens, scale ruler, and float maintain fixed spatial relationship throughout entire video: no parallax shift, no occlusion, no change in relative positioning; float position changes continuously and monotonically upward as pressure increases (visible motion correlated with regulator adjustment).

Scientific and Causal Correctness rubric:
level_1: Float remains motionless at zero position throughout; scale ruler shows no readable markings or is inverted; manometer shows no response to pressure change; lens alignment has no effect on float visibility; no causal link between regulator adjustment and float movement is observable.
level_2: Float moves but in wrong direction (downward when pressure increases); float jumps discontinuously (teleports between positions without intermediate frames); scale ruler markings are inconsistent with manometer type (e.g., shows bar or psi instead of Pa); lens is misaligned yet float appears sharp, violating optical principle of focus dependence.
level_3: Float rises continuously and smoothly as regulator is adjusted; float position corresponds to increasing values on scale ruler (higher numbers upward); scale ruler displays units consistent with 0–2000 Pa range (e.g., labeled “Pa”, “Pascal”, or numeric scale starting near 0 and extending to ≥2000); lens is aligned so float and scale are simultaneously in focus: both appear sharp and legible in same frame.
level_4: All conditions for score 3 are satisfied, AND float movement begins only after regulator adjustment starts (no pre-movement or lagged response); float stops moving immediately when regulator adjustment ceases; scale ruler orientation matches manometer design (vertical for diaphragm type); no float overshoot or oscillation beyond steady-state position; no hysteresis (no downward drift after pressure stabilization).
level_5: All conditions for score 4 are satisfied, AND float displacement is proportional to regulator input (visually monotonic and non-linearly progressive, matching expected diaphragm response); scale ruler has uniform spacing between major divisions and correct zero reference at bottom; lens alignment enables simultaneous clarity of float edge and scale graduation lines: no blurring of either; no visual artifact (e.g., glare, reflection, shadow) obscures float position or scale reading at any frame.

Spatiotemporal Consistency rubric:
level_1: The manometer vanishes and reappears in a different orientation or location; the lens jumps from off-screen straight to its centered viewing position with no travel shown; the float jumps directly between two scale positions with no visible path between them; the scale ruler flickers, or its length or angle changes abruptly from one frame to the next; the overall lighting switches abruptly between bright and dark with no gradual transition.
level_2: The manometer stays on screen but its tilt or rotation changes inconsistently between frames; the lens shifts sideways in a way that skips rather than glides; the float advances in visible skips instead of a smooth rise; the scale ruler visibly bows or stretches out of its straight shape between frames; shadows on the manometer, lens, or float change direction or intensity discontinuously between frames with no corresponding change in lighting or position.
level_3: The manometer, lens, scale ruler, and float all stay in view for the whole clip in the same relative arrangement; the manometer body does not rotate, tilt, or slide; the lens holds a fixed position relative to the manometer housing; the float travels only straight up the scale ruler with no sideways drift; the scale ruler keeps a straight vertical line and the same length across frames; lighting remains stable in color tone and direction throughout, with no strobing, pulsing, or sudden shifts in cast shadows on any part of the setup.
level_4: The fixed arrangement and steady lighting described above hold for the whole clip, and in addition: the float's upward motion looks smooth frame to frame, with no stutter or sudden speed change; the lens shows no visible shift or wobble of its own position at any point; the tubing between the regulator and the positive port bends naturally, never stretching, snapping taut, or passing through other objects; the tabletop and background keep the same edges and perspective in every frame.
level_5: Everything steady and smooth described above holds, and in addition: the manometer body, scale ruler, and float show no visible warping of their outlines at any frame; the float's rising path stays aligned with the scale ruler's centerline with no visible sideways drift; the blur on the moving float matches its apparent speed, so it is not perfectly sharp during a fast rise nor blurred while nearly still; the highlight from the light source on the lens surface stays in one consistent spot rather than jumping between frames; the tubing is never shown passing behind the lens in one frame and back in front in the next without a visible, continuous transit between.