Description

1. What the DAA24270N1 does

• 0-10 V linear output, 0.1 % accuracy, 4 mV/V strain-gauge bridge
• 150 % safe overload, 300 % ultimate overload, -40 °C to +85 °C
• IP67 stainless-steel body, polyurethane cable, 3 m length
• SIL-2 dual-channel comparison, 10-year design life
• CE/UL recognised to EN 81-20/50 and CSA B44.1

2. Tools to carry

• DAA24270N1 sensor (Nanjing Zhuye part #OT-LCAD-AA24270N1-10V) in anti-static box
• 2 mm & 3 mm flat screwdrivers, 13 mm & 17 mm open wrenches
• Otis Service Tool (OST) laptop with Load plug-in licence
• 1 kg, 5 kg, 10 kg certified test weights
• IPA wipes and lint-free cloth
• Lock-out / tag-out kit

3. Installation – 30 minutes if you mark the wires
   Safety: place the car on inspection, open the main disconnect and mechanically lock the ropes.

1. Mark the old sensor orientation – note arrow direction and cable exit.
2. Remove M12 mounting bolts; lower the sensor onto a rag (surface is oily).
3. Clean the load pad with IPA; check for cracks >1 mm.
4. Mount new DAA24270N1; torque bolts to 25 N·m.
5. Connect cable: red (+10 V), black (0 V), white (signal +), green (signal -).
6. Apply power – green LED steady; zero-load output 0.00 V ±0.02 V.
7. Place 10 kg test weight; output must rise to 0.10 V ±0.01 V.
8. Run 3 full-speed cycles; verify load displayed in car matches actual weight.
9. Record serial number, date and zero offset in CMMS.

4. Functional test – prove it to the inspector
   a) Zero drift: <0.02 V after 10 min warm-up.
   b) Linearity: R² >0.9999 from 0 kg to rated capacity.
   c) Hysteresis: <0.05 % of full scale.
   d) Temperature coefficient: <0.02 %/°C from -10 °C to +50 °C.
   e) Export OST calibration report and attach PDF to site file.
5. Preventive maintenance schedule

• Monthly – visual sweep for cable chafing or oil ingress at gland.
• Quarterly – measure zero offset; re-zero if >±0.02 V.
• Annually – 5-point linearity check with certified weights.
• Every two years – replace the polyurethane cable – UV hardens after 5 years.

6. Replacement cycle – duty and environment decide
   Manufacturer specification: 10 years. Nanjing Zhuye analytics refine this:

• Light duty (<150 starts/day, clean office): 12 years
• Standard duty (150–400 starts, residential): 10 years
• Heavy duty (>400 starts, hospital, mall): 8 years
• High vibration (machine-room-less, rooftop): 6 years – strain-gauge fatigue.

• Zero drift >±0.05 V – strain element cracked
• Output noise >10 mV – internal amplifier failing
• Cable insulation cracked – moisture ingress imminent
• LED red steady – internal CPU fault

7. Eco-disposal & warranty
   Return the old sensor in the prepaid box; Nanjing Zhuye recovers stainless steel, copper and gold and issues a €10 recycling credit. Every DAA24270N1 ships with a 24-month replacement warranty, extendable to 60 months when you join our annual calibration program.
8. Why buy from Nanjing Zhuye Elevator Parts

• 400 units in stock, Rotterdam & Nanjing, ready for same-day courier
• Factory-sealed Otis packaging with hologram and calibration certificate – no grey-market clones
• QR code on box links to 3-minute zeroing video and test sheet
• 24/7 technical hotline staffed by ex-Otis weighing specialists
• Bundle pricing: buy 5 sensors and get a free 10 kg test weight plus freight credit

9. Bottom line
   A drifting load sensor is the fastest way to energy waste and passenger complaints. Keep a genuine DAA24270N1 on every truck, swap and calibrate it in 30 minutes, and your elevators will stay efficient, level and compliant for the full 10-year design life. Order today from Nanjing Zhuye Elevator Parts – the fastest route from “load fault” to “perfect ride.”

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