ZT Digital Load Cell (model utama T301X) adalah generasi terbaru dari digital compression canister load cell kelas berat buatan Avery Weigh-Tronix (sebelumnya Avery Berkel). Ini bukan load cell analog biasa — sinyal diubah jadi digital langsung di dalam cell pakai 24-bit sigma-delta ADC + prosesor canggih, sehingga outputnya stabil digital (RS485 multi-drop protocol) yang tahan jarak jauh hingga ~1 km tanpa noise atau degradasi sinyal.
Prinsip Kerja & Desain (Analogi Sederhana): Bayangkan load cell tradisional seperti timbangan analog yang kabelnya panjang tapi mudah terganggu noise/listrik petir — sinyal kecil mV/V mudah rusak. ZT seperti “smart sensor IoT” di dunia weighing: strain gauge (8 buah) mendeteksi deformasi kolom stainless steel, lalu ADC 24-bit + prosesor internal langsung konversi ke nilai digital akurat (6 juta internal divisions), kirim via bus RS485 aman (anti-fraud, encrypted). Analoginya seperti upgrade dari telepon kabel analog ke VoIP digital — lebih akurat, tahan interferensi, bisa diagnosa sendiri, dan koneksi daisy-chain tanpa junction box ribet.
Kapasitas (Rated Capacity / Emax):
- 30 ton (30 t)
- 45 ton (45 t) (ada varian lb seperti 66,000 lb ≈ 30 t, tapi fokus metrik 30/45 t)
Akurasi & Sertifikasi:
- OIML R60 approved, kelas C6 (6000 divisions/verification intervals)
- Sertifikat: R60/2000-A-DK2-25.01 atau serupa (ada juga NTEP Class III L 10,000d di beberapa region)
- Internal divisions: 6,000,000 @ rated capacity
- Combined error: <150 ppm R.C.
- Non-repeatability: <50–80 ppm
- Creep (10 s – 30 min): <120 ppm
- Temperature effect on zero: <15 ppm/°C
- Temperature effect on span: <6 ppm/°C
- Zero return (30 min): <80–120 ppm
Spesifikasi Elektrik & Komunikasi:
- Supply: ±12 VDC (internally regulated)
- Communication: RS485 multi-drop, 115.2K bps, Linear Bus protocol dengan anti-fraud & self-diagnostic
- System update rate: 50 Hz (auto-adjusted)
- Max cells: hingga 32 cells (2 network terpisah, masing-masing max 16 cells) via indikator ZM510/615 atau serupa
- Cable: Amphenol LTW® X-LOK push-lock connectors (IP68/IP69K), polyurethane jacket + stainless steel braid optional, panjang cell-to-cell 4 m / 9 m, home run hingga 15–200 m (tergantung jumlah cell)
- Lightning/EMC protection: Integral two-stage surge suppressors (IEC 61000-4-5 Level 4), certified severe environment
Ketahanan Lingkungan & Mekanik:
- Material: 100% stainless steel (enclosure 2.35 mm thick 304/17-4 PH aircraft-quality alloy, hardened/tempered)
- IP rating: Cell hermetic IP68 (submersible 1 m – 7 hari), cell-cable entry IP69K (high-pressure washdown)
- Operating temp: -40°C to +65°C (compensated -10°C to +40°C)
- Safe overload: 150% R.C.
- Ultimate load: 230% R.C.
- Fatigue life: 1,000,000 cycles
- Tilt angle max: ±3° dari vertical (rocker-column suspension top/bottom)
- Anti-rotation: Pre-assembled load buttons dengan dual radial clamping + cam lock stainless steel, pre-greased, rubber bellows optional
Fitur Unggulan (Smart & Rugged):
- No junction box dibutuhkan — langsung daisy-chain ke indikator
- Smart diagnostics: Monitor communication status, overload counter, peak weight, temperature, live weight per cell, error log (over/under load, ghosting, dll)
- Ghosting feature (non-trade mode): Sistem tetap jalan meski satu cell gagal
- Faster calibration/install: Factory calibrated, linearized, plug-and-play dengan X-LOK connectors
- Anti-fraud protocol & asset management (serial number traceable)
- Intelligent management: Kompatibel ZM605/615 indikator, Lua scripting untuk custom alert/email/web
- Lightning protection integral Class 4
Aplikasi Umum:
- Truck scale / weighbridge (vehicle weighing)
- Railway weighing
- Vessel/hopper/tank heavy capacity
- Aplikasi ekstrem: tambang, pelabuhan, area basah/korosi tinggi, daerah rawan petir
