OHAUS CKW55CN Weighing Indicator Controller
| Brand | OHAUS |
|---|---|
| Origin | USA |
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | CKW55CN |
| Price | Upon Request |
Overview
The OHAUS CKW55CN Weighing Indicator Controller is an industrial-grade, NSF- and USDA-certified weighing interface engineered for high-integrity production, packaging, and quality control environments. Designed around precision load cell signal conditioning and real-time digital processing, the CKW55CN operates on a robust 24-bit A/D conversion architecture to deliver stable, repeatable weight readings under dynamic operational conditions. Its core function is to serve as a centralized display and control unit for analog or digital load cells—particularly IP67-rated stainless-steel sensors—enabling seamless integration into checkweighing, filling, batching, and inventory tracking systems. The device complies with NTEP Class III (10,000e certified divisions) requirements for legal-for-trade applications in food, pharmaceutical, and chemical manufacturing where regulatory traceability and environmental resilience are mandatory.
Key Features
- High-resolution display with up to 20,000 internal divisions and NTEP-certified 10,000e readability
- IP66-rated stainless-steel enclosure, compatible with IP67 stainless-steel load cells for washdown and high-humidity environments
- NSF/USDA certification and full alignment with HACCP principles for food safety-critical operations
- 24-segment tri-color (red/yellow/green) LED checkweighing indicator with configurable audible alarm via built-in buzzer
- Three operational checkweighing modes: standard, negative-tare, and zero-point referencing
- Onboard data storage for up to 20 weight records—including timestamped entries when paired with optional real-time clock module
- Integrated statistical engine supporting total count, cumulative mass, arithmetic mean, and standard deviation calculations
- GMP-compliant data handling with audit-ready output formatting, including user ID, date/time stamp, and measurement uncertainty flags
- Hardware- and software-enforced configuration lockout to prevent unauthorized parameter changes—fully compliant with FDA 21 CFR Part 11 access control requirements
- Standard RS-232 serial interface; optional expansion modules support RS-422/RS-485 communication, footswitch input, and AC/DC relay outputs
- Optional Ni-MH rechargeable battery pack for portable or backup power operation
Sample Compatibility & Compliance
The CKW55CN is compatible with standard 4-wire or 6-wire analog load cells (mV/V output) and select OHAUS digital load cell transmitters. It supports sensor excitation voltages of 5 V DC and adjustable filtering to minimize vibration-induced noise in high-throughput lines. All firmware and calibration routines adhere to ISO/IEC 17025 metrological traceability standards. Regulatory certifications include NSF/ANSI Standard 18 — Food Equipment, USDA-FSIS Directive 7120.1 for meat/poultry processing equipment, and compliance with EU Machinery Directive 2006/42/EC. For pharmaceutical applications, the unit supports GLP/GMP documentation workflows through structured ASCII or Modbus RTU output protocols.
Software & Data Management
Data export follows industry-standard ASCII text format with configurable delimiters and field ordering (e.g., “Weight, Unit, Timestamp, Operator_ID”). When connected to a host PC or PLC, the CKW55CN can transmit full GMP audit trails—including pre- and post-calibration verification logs, user login events, and parameter modification history. Optional OHAUS DataBridge™ software enables centralized configuration management across multiple indicators, batch report generation, and CSV/Excel-compatible export. All communications support time-synchronized logging when used with external NTP servers or GPS-based time sources. Firmware updates are performed via secure USB or RS-232 using digitally signed binaries to ensure integrity.
Applications
- Inline checkweighing in food and beverage packaging lines (e.g., pouches, trays, bottles)
- Dynamic fill-level verification for volumetric fillers and auger feeders
- Raw material receipt inspection and warehouse inventory reconciliation
- Batch ingredient verification in compounding and blending stations
- QC lab weight validation prior to analytical testing (e.g., sample preparation for HPLC or ICP-MS)
- Regulated pharmaceutical packaging line weight checks per USP and EU Annex 11
FAQ
Does the CKW55CN support NIST-traceable calibration?
Yes—calibration procedures follow OHAUS Technical Bulletin TB-01 and may be performed using NIST-traceable test weights with documented uncertainty budgets.
Can the CKW55CN be integrated into a SCADA system?
Yes—via optional RS-485 Modbus RTU protocol or third-party OPC UA gateways using the standard RS-232 ASCII output.
Is password protection available for configuration settings?
Yes—dual-level password access (operator and administrator) is supported, with configurable timeout and failed-attempt lockout thresholds.
What is the maximum cable length supported for RS-485 communication?
Up to 1,200 meters at 9.6 kbps, per EIA/TIA-485-A specification, with proper twisted-pair shielding and termination.
Does the unit meet explosion-proof requirements for hazardous areas?
No—the CKW55CN is rated for general-purpose industrial use only and does not carry ATEX, IECEx, or UL HazLoc certification.
