Konica Minolta CL-200 Color Illuminance Meter
| Origin | Japan |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | CL-200 |
| Pricing | Upon Request |
Overview
The Konica Minolta CL-200 Color Illuminance Meter is a portable, high-accuracy optical measurement instrument engineered for simultaneous photometric and colorimetric characterization of light sources. Based on CIE 1931 standard observer functions, the CL-200 employs three silicon photodiodes with spectral responsivity closely approximating the CIE tristimulus sensitivity curves (f1 error ≤ ±8%). It delivers traceable measurements of illuminance (in lux or foot-candles), chromaticity coordinates (CIE 1931 xy and CIE 1976 u’v’), correlated color temperature (Tcp), Duv deviation, and color difference (ΔE in multiple spaces: XYZ, xy, u’v’, and Δu’v’). Designed to meet JIS C 1609-1 Class AA specifications for illuminance meters, the CL-200 supports applications requiring metrological rigor—such as lighting quality assurance, display calibration, transportation signage verification, and R&D validation under controlled ambient conditions.
Key Features
- Triple-sensor photometric architecture with CIE 1931 spectral matching (f1 ≤ ±8%)
- Simultaneous measurement of illuminance (0.1–99,990 lx / 0.01–9,999 fcd) and color parameters (xy, u’v’, Tcp, Δuv, ΔE)
- Four-point calibration suite: Standard A-source calibration, user-defined A-source calibration, multi-directional Hg-lamp-based RGBW calibration, and customizable multi-directional user calibration
- Auto-ranging across four illuminance decades with real-time unit switching (lx ↔ fcd)
- High-resolution 4-digit backlit LCD display with 0.5 s response time in continuous mode
- Data hold, multi-point averaging (2–30 points), and user offset correction for field adaptation
- RS-232C interface for PC connectivity and automated data logging
- Compact form factor (69 × 174 × 35 mm), lightweight design (215 g without batteries), and extended battery life (>72 h on alkaline AA cells)
Sample Compatibility & Compliance
The CL-200 is optimized for non-contact measurement of self-luminous surfaces and illuminated targets, including LED arrays, OLED panels, CRT displays, EL sheets, roadway luminaires, aviation ground lighting systems, railway signal indicators, and architectural façade lighting. Its minimum measurable illuminance for colorimetry is 5 lx (or 0.5 fcd), ensuring reliable chromaticity assessment under typical indoor and outdoor operational lighting levels. The instrument complies with JIS C 1609-1:2018 Class AA accuracy requirements for illuminance meters and adheres to CIE Publication No. 15:2018 for colorimetric computation. While not certified for regulatory submission per se, its traceable calibration methodology and documented f1 error support use in GLP-aligned environments where instrument performance verification is documented per internal SOPs.
Software & Data Management
The CL-200 interfaces via RS-232C to host computers running Konica Minolta’s proprietary data acquisition software (e.g., CL-S10 series utilities), enabling batch export of time-stamped measurement sets in CSV or TXT formats. Each record includes Ev, x, y, u’, v’, Tcp, Δuv, and ΔE values alongside operator ID, location tag, and calibration timestamp. Audit trails are maintained through manual logbook entries; the device itself does not implement FDA 21 CFR Part 11-compliant electronic signatures or automated audit logging. However, its deterministic output format and stable firmware (v3.x) facilitate integration into validated laboratory information management systems (LIMS) when paired with compliant middleware.
Applications
- Quality control of lighting products during manufacturing (LED modules, fluorescent tubes, HID lamps)
- Color consistency verification for display technologies (CRT, LCD, OLED, microLED)
- Compliance testing of public infrastructure lighting per national road illumination standards (e.g., JIS Z 9110, EN 13201)
- Verification of color rendering and white point stability in museum, retail, and healthcare lighting
- Field validation of signage luminance and chromaticity for rail/aviation safety regulations
- Photobiological safety screening (supplementary use with irradiance-capable instruments)
- Academic and industrial research involving human-centric lighting metrics and circadian stimulus modeling
FAQ
What illuminance standards does the CL-200 comply with?
It meets JIS C 1609-1:2018 Class AA specifications for illuminance meters and implements CIE 1931 and CIE 1976 colorimetric frameworks.
Can the CL-200 measure pulsed or modulated light sources?
No—it is designed for steady-state DC or slowly varying light; rapid PWM or flickering sources may yield inaccurate chromaticity due to integration time constraints.
Is factory recalibration required annually?
Konica Minolta recommends annual verification against a NIST-traceable reference lamp; full recalibration is advised if drift exceeds ±2% Ev or ±0.002 xy under standard A-light conditions.
Does the CL-200 support USB connectivity?
No—only RS-232C serial communication is provided; USB-to-serial adapters may be used with driver-compatible hosts.
What is the lowest illuminance at which colorimetric data remains valid?
Chromaticity measurements are specified as valid at ≥5 lx (or ≥0.5 fcd); below this threshold, signal-to-noise ratio degrades significantly in u’v’ space.
