DCP007 Complete Color

The Kemtrak DCP007 is an industrial UV-VIS-NIR fiber optic photometer designed to accurately measure the concentration of light absorbing substances. The Kemtrak DCP007 uses a combination of long life,solid state LED lamps with fiber optics that provide a measurement with very high precision. Thanks to a proprietary dual wavelength four channel measurement technique, high concentration to ppm trace analysis is no problem. The primary “absorbing” wavelength measures any changes in the process medium, while the second reference wavelength, which is not absorbed by the process medium,compensates for turbidity and/or fouling of the optical windows. Since optic fibers are used to pipe light to the measurement point and back, the measurement cell contains no electronics, moving parts or sources of heat that result in condensation on the optical surfaces. Standard measurement cells are machined in sanitary grade stainless steel with sapphire glass.

Product Description

• Real time in-line measurement
• Color & concentration: 280 – 2 000nm
• Zero maintenance
• High performance long life LED lamps
• Fiber optics - no condensation intrinsically safe (ATEX)
• Extensive range of industrial sensor designs
• Alarm signals for data and system failures
• Integrated PID controller

Main Features

Specification

Housing	Glass-fibre reinforced polyester & polyester front panel  Captive lid screws & wall mounting brackets stainless steel  220 x 120 x 90 mm (8.66 x 4.72 x 3.54 inch) L x W x D  IP 65 / EN 60529
Display	16 x 2 alphanumeric dot matrix LCD display  LED background illuminated  Display update: 0.5 seconds  Display units: g/L, ppm, %, M, AU. User configurable.  LED 1 (green): power on  LED 2 (red): alarm  LED 3 (red): clean
Operation	4 push buttons
Data Logger	• 6 900 data points (timestamp, average, max. & min.) , ring buffer  • Configurable log time interval 1s to 24hr
Event Logger	• 10 000 events  • Alarms, zeroing, cleaning, calibration & system events    (power, system failures, high/low system temperature)
Photometric  Range	At 500nm, 10mm OPL: 0.000 - 3.000 AU
Photometric  Accuracy	At 1AU (NIST 930D filter): ±0.001 AU  At 2AU (NIST 1930D filter): ±0.005 AU
Photometric  Noise	At 1AU, 25°C, 500nm: ±0.0001 AU
Linearity	± 0.5% of respective measuring range
Remote Input	1 x Digital input (potential free contact) for:  • Auto clean  • Zero  • Hold output
mA Output	1 x 0/4 - 20 mA galvanically isolated  Accuracy: <0.2%  Resolution: < 0.05%  Load: 0 - 400 Ohm
Relay Outputs	2 x 0.5A 240VAC User configurable (alarm, PID, system fault)  1 x 0.5A 240VAC Automatic cleaning control  PTC resistor fuses in series with the relays  LED status indicators flash when relays are active
Fail-Safe	Relay output & 0/4-20mA value
Operating  Conditions	Ambient temperature: -10°C to +50°C (14°F to 122°F)  Transport: -20°C to +70°C (-4°F to 158°F)
Power  Supply	115/230V AC selectable, 50-60Hz, 1A
Power  Consumption	25 VA (max.)
Certificates	ISO 9001:2000, CE, ATEX I I 2 GD EExd-IIB-T5 I (option)
Manifolds	Standard designs include DIN Flange (DIN 2633),  Tri-Clamp® (ISO 2852 & DIN 32676),  Sanitary Thread SC (DIN 11851),  Straight Pipe Thread (DIN ISO 228 BSP).  Line size up to DN100.
Materials	Standard material stainless steel EN 1.4435 / 316L.  Other materials include Titanium, Hastelloy C-276, PEEK,  TFMC (TFM 25% Carbon), PCTFE, PVC-C, PVDF
Operating  Conditions	Ambient & process temperatures up to 200°C (392°F)  Process pressure from 10 mbar to 100 bar  Operating conditions subject to material and design in use
Protection	IP66 / EN 60529, ATEX (option)

& Concentration Control

How it works

Measuring Principle

The Kemtrak DCP007 color & concentration analyzer consists of three components:

1. Control Unit. The control unit contains all electronics including light source and detectors.
2. Flow Cell. In-line (flow through) measurement cell.
3. Fibre Optics. Industrial grade fibre optic assembly connects the control unit to the flow-cell.

The Kemtrak DCP007 photometer measures at two wavelengths. A primary "absorbing" wavelength is used to measure the substance being monitored while a "non absorbing" reference wavelength is used to compensate for turbidity, air bubbles and/or fouling.

Fiber optics are used to shine a precisely focused light beam through the process medium and back to a silicon photo-detector. A second photo-detector is used directly on the lamps to compensate for temperature effects and aging. The resulting measurements are very accurate with low drift and long-term calibration stability.

The attenuation of the transmitted light beam caused by light absorbing substances in the process medium is mathematically described by the Beer-Lambert law.

Applying the Beer-Lambert law (below), the concentration of the sample can be calculated.

where:
    A = absorbance (= - log transmittance)
    e = molar absorptivity coefficient
    l = optical path length
    c = concentration of absorbing species

 
 
The Kemtrak DCP007 photometer is ideally suited for industrial environments where simplicity, stability and zero maintenance is vital.