The J18 system consists of a J18 handheld meter and one of several interchangeable heads (list below) which connect directly to the J18.
J1803 Luminance Head
- Video and projection screens
- Surface reflectance
- Computer displays
J1805 Head for LEDs - Output of red, yellow, green and blue LEDs
J1806 Radiance/Radiant Intensity Head - Display color balance
J1810 Chromaticity Head
- Measurement of Chromaticity and White Balance of color monitors
- Color Temperature of Light Sources
J1811 Illuminance Head
- Highway illumination
- Luminaries and lamps
- Workstation illumination
- Lighting for safety
J1812 Irradiance Head
- Laser experiments
- Infrared LED testing
| J1803 | J1805 | J1806 | J1810 | J1811 | J1812 |
| Measurement |
| Luminance | Luminance Intensity | Radiant Intensity | Chromaticity, Luminance | Illuminance | Irradiance |
| Applications |
| Displays, Television, Medical | LEDs | Displays, Television | Displays, Television | Highway lighting, Office lighting, Transportation | Lasers, IR LEDs, Research |
| Ranges |
0.3 to 300,000 candelas/m2 (Nit)
0.1 to 100,000 footlamberts | 0.01 millicandelas to 10 candelas | 0.001 to 200 W/m2/sr | 0.001 to 0.999 x, y and u', v' 0.3 to 1,000 candelas/m2 (Nit)
0.1 to 300 footlamberts | 0.01 to 5,000 lux (lm/m2) 0.01 to 500 footcandles | 0.001 to 2,000 mW/m2 0.1 nW to 0.2 mW |
| Spectral Response |
| CIE Photopic | CIE Photopic | Flat | CIE Tristimulus | CIE Photopic | Flat |
| Spectral Accuracy |
| f1' = <3% (DIN Class A) | f1' = <3% (DIN Class A) | ±8% 450 to 750 nm | f1' = <3% (DIN Class A) | f1' = <3% (DIN Class A) | ±8% 450 to 950 nm |
| Acceptance Angle |
| 8° | 8° | 8° | 16° | 180° (Cosine) | 96° (Approx.) |
| Other Features |
| Suction cup | LED adapters | Suction cup | Suction cup | Level and cover | Cover |
- Real-time Color Measurements
- Ten Memories for Storing Reference Colors (with J1810 color head)
- RGB Bar Graphs
- D6500 Kelvin Calibration
- Color Temperature Measurement
- Full Control of Measurements and Output of Results (RS-232)
- Analog Output