Sensor-controlled zones need a named control note
An occupancy sensor note describes what was observed in a named lighting zone. It is not a device selection page and it does not say that a control arrangement is suitable for every space, task or person. Its job is narrower: note the zone, the observed on, off or dimmed state, the delay assumption, the daylight condition, any manual override and the measured check that belongs with that state.
For Australian offices, classrooms, amenities, warehouses, corridors, clinics and hospitality spaces, the same room can have more than one control condition across a day. A desk row may be on while a rear row is off. A storeroom may turn on only after movement near the entry. A meeting room may hold a dimmed state after people leave. A perimeter zone may be held down by daylight.
Keep the zone language close to lighting zone and the tabular shape close to lighting control notes. Where the note later feeds annual kWh, connect it to lighting control zones and operating hours and the lighting control kWh assumptions table.
| Note field | What to write | Boundary |
|---|---|---|
| Zone name | Tenancy west desk row, warehouse aisle 3 or amenities entry group. | Does not cover every nearby luminaire. |
| Sensor area | Door side, desk row, aisle run, room centre or another observed area. | Does not describe concealed wiring or control design. |
| Observed state | On, off, dimmed, held on, held off, delayed off or manual override. | Does not prove future behaviour. |
| Delay assumption | Observed delay, stated timer label or unknown delay. | Does not confirm internal settings. |
| Daylight condition | Daylight present, blinds state, after-dark, overcast or direct sun nearby. | Does not stand for every season. |
| Measured check | Point label, plane, lux reading and control state. | Does not replace a full lighting design. |
Keep the sensor note distinct from luminaire choice
Occupancy sensor pages can easily drift into hardware choice, coverage patterns or electrical work. This page stays on the note side. It names what was seen from the room: which zone responded, which state appeared, how long the state appeared to remain, whether daylight changed the result and which measured illuminance readings belong with that condition.
If the same area needs a lighting quantity estimate, keep that estimate on its own line. A room lighting estimate can describe a room area and target condition. A workplace lighting estimate can hold a task-focused lighting check. Those estimates sit beside the control note; they do not turn the sensor observation into a suitability claim.
| Topic | Belongs in this page | Belongs elsewhere |
|---|---|---|
| Zone response | Observed on, off, dimmed or delayed state for a named zone. | Electrical design, cabling, commissioning or sensor placement choice. |
| Time delay | Observed delay before a light level changed, or unknown delay. | Internal programming confirmation. |
| Daylight interaction | Daylight present, daylight-linked hold-off or daylight-linked dimming noted as observed. | Seasonal daylight model or window design. |
| Measured check | Lux point and plane taken under the recorded state. | Full grid measurement method. |
| Energy context | Connected load and operating hours assumption linked to the same zone. | Financial advice or guaranteed result. |
Zone boundaries should be visible in the wording
A control note is clearest when the zone boundary can be recognised later. The boundary might be a room, desk row, aisle, amenity area, storage area, circulation path or perimeter band. The wording should show what is inside the zone and what is outside it.
For multi-zone rooms, do not let one sensor note stand for the whole room. A perimeter zone beside windows may behave differently from an inner zone. A warehouse aisle may respond differently from a loading bay. A classroom entry row may stay on while a presentation area is dimmed. These are not faults by themselves; they are note boundaries.
| Zone pattern | Note wording | Compare with |
|---|---|---|
| Single room | Meeting room 2, all ceiling luminaires, observed normal scene. | Operating hours for the room booking pattern. |
| Perimeter band | Office north window row, daylight present, inner row separate. | Daylight vs electric lighting notes. |
| Aisle run | Warehouse aisle 3, entry end sensor response, far end checked separately. | Connected load notes for the aisle group. |
| Amenities | Male amenities entry and basin zone, cubicle zone not included. | Lighting control notes. |
| Circulation | Corridor east half, after-hours state, adjacent lobby separate. | Operating hours lighting schedule. |
Observed states need plain labels
The note should name the state before judging a reading or energy estimate. "On" means the zone appeared on at its observed output. "Off" means the luminaires appeared off. "Dimmed" means the output appeared lower than the normal state. "Held on" and "held off" are observation labels, not promises about why the control acted that way.
Where a dimmed value matters, connect the note to dimming range and note the visible level if known. A scene label, wall control label or meter reading can help, but the note should remain modest. If the level is not known, write unknown.
| Observed state | Plain note | Caution |
|---|---|---|
| On | Zone on after entry movement, normal scene label visible. | Do not treat as all-day state. |
| Off | Zone off during vacancy observation, daylight present. | Do not assume the same state at night. |
| Dimmed | Zone dimmed, level label unknown, daylight present. | Do not assign a percent without evidence. |
| Held on | Zone remained on after area cleared for the observed period. | Do not infer the cause. |
| Held off | Zone remained off when daylight was present and movement was limited. | Do not infer full daylight control logic. |
| Manual override | Wall control changed state during the note. | Keep manual action distinct from automatic response. |
Delay assumptions belong beside the observation
Time delay affects both measured readings and annual kWh assumptions. A note can say that a zone changed after an observed number of minutes, that a timer label was visible, or that the delay was unknown. It should not claim internal programming unless that information was directly available and recorded.
For energy comparison, place delay notes beside lighting control kWh assumptions. For operating schedules, keep the hours band in operating hours lighting schedule. The control note should join the two without promising a result.
| Delay item | Note line | Energy note |
|---|---|---|
| Observed off delay | Lights changed to off about 8 minutes after the last observed movement. | Timer assumption can be tested in the kWh sheet. |
| Observed dim delay | Zone dimmed after vacancy period, then remained dimmed during observation. | Dimmed connected load needs its own assumption. |
| Labelled timer | Wall label noted as 10 minutes, behaviour not fully checked. | Label and observation should stay separate. |
| Unknown delay | Delay not observed within the note period. | Do not add a delay value without a stated assumption. |
| Manual change | Person changed the control state during the note. | Manual action should not be counted as automatic response. |
Daylight override should be recorded as a condition
Daylight can change how a sensor-controlled zone behaves. It may hold a zone off, dim a zone, or make a measured reading difficult to compare with an after-dark condition. The note should state the daylight condition and the observed control state without making a broad claim about daylight-control suitability.
For side-by-side notes, keep daylight-only, electric-only and combined conditions near daylight vs electric lighting notes. When measured readings are involved, keep point labels and planes near lux meter reading notes and measured illuminance.
| Daylight condition | Control note | Measured check |
|---|---|---|
| After-dark | Electric lighting state only, zone and scene named. | Lux point belongs to electric-light condition. |
| Overcast day | Daylight present, blinds state noted, electric state named. | Reading belongs to combined condition unless electric-only was checked. |
| Direct sun nearby | Sun patch or reflection noted outside or on the measured plane. | Mark the point so it is not blended silently. |
| Blinds changed | Blind state before and after the change. | Split the reading set if the plane changed materially. |
| Daylight-linked hold-off | Zone appeared held off while daylight was present. | Note as observed state, not as a design verdict. |
Link measured checks to the same control state
A lux reading without the control state can become misleading. A point taken when a sensor zone is on cannot be compared cleanly with a point taken when the same zone is dimmed or held off. The note should hold point label, plane, daylight condition and control state together before averages are calculated.
When a point set is ready for averaging, the lux meter average can summarise readings that share the same plane and condition. When the same space has a calculated estimate, keep room lighting or workplace lighting output beside the measured note rather than inside it.
| Measurement field | Example wording | Split when |
|---|---|---|
| Point label | Desk P1, amenities basin, aisle 3 mid-point or corridor C2. | Labels belong to different zones. |
| Plane | Desk plane, floor plane, bench plane or vertical face. | Planes are mixed. |
| Control state | Zone on, dimmed, off, held on or manual override. | Sensor state changed during the set. |
| Daylight | After-dark, overcast, blinds half closed or direct sun nearby. | Daylight condition changed materially. |
| Average group | Same zone, same plane, same state and same daylight condition. | Any of those conditions changed. |
Energy comparison needs connected load and hours
An occupancy sensor note can support an energy estimate only when the connected load, hours and control assumptions are named. The connected load field should match the luminaires in the zone. The hours field should match operating hours rather than a broad site guess.
For annual kWh, keep formulas near annual lighting kWh formulas and the note shape near business lighting energy notes. A numeric comparison can sit beside an energy change estimate, lighting power density estimate or luminous efficacy check when the inputs are clearly labelled.
| Energy field | Note beside the control state | Keep distinct from |
|---|---|---|
| Connected watts | Zone load from connected load notes. | Unrelated rooms or future luminaire changes. |
| Normal hours | Occupied hours band for the same zone. | Whole-building opening hours where the zone differs. |
| Vacancy assumption | Period when the zone may be off or dimmed, stated as an assumption. | Guaranteed reduction. |
| Dimmed load | Stated dimmed wattage or unknown dimmed load. | Visual brightness or comfort claim. |
| Annual kWh | Formula row linked to the same zone and hours band. | Payback, incentive or account advice. |
Compact occupancy sensor control note
A compact note can fit into a spreadsheet or site note as long as each line keeps the same boundary. The point is to make later comparisons calmer: the reader can see which zone, state, delay, daylight condition and measured values were present.
| Field group | Fields to note |
|---|---|
| Identity | Site area, room or zone name, recorder, date and time. |
| Boundary | Included luminaires, excluded adjacent zones and visible control grouping. |
| Sensor observation | Movement location, observed state, manual action and state change. |
| Delay | Observed delay, label seen, unknown delay or split observation. |
| Daylight | Sky condition, window side, blind state, sun patch and daylight-linked state. |
| Measurement | Point label, plane, lux value, average group and control state. |
| Energy | Connected load, hours band, dimmed assumption and annual kWh formula row. |
| Boundary note | Planning note only; keep the disclaimer beside any estimate. |
The cleanest note is modest. It says what happened in a named Australian lighting zone under stated conditions. It keeps daylight, sensor state, delay, operating hours and kWh assumptions visible without turning the page into a hardware choice, wiring guide or guaranteed energy outcome.