■  작동 원리
Kemtrak DCP-007 색도 & 농도 분석기는 다음의 3가지 부분으로 구성됩니다.

1. 제어장치 : 제어 장치에는 광원 및 감지기를 포함한 모든 전자 장치가 들어 있습니다.

2. 측정셀 : 견고한 인라인 (플로우 스루) 산업 공정 연결

3. 광섬유 : 산업 등급 광섬유 어셈블리는 제어 장치를 플로우 셀에 연결합니다.

위의 사진은 316L stainless steel DIN DN50 flange measurement cell과 stainless steel로 완벽하게 맞물린 광섬유입니다.

각각의 measurement cell과 광섬유는 최대 250℃까지 견딜 수 있습니다.

■ 측정 원리

• Kemtrak DCP007-NIR 농도계는 두 파장에서 측정합니다. 1차 "흡수" 파장은 모니터링되는 물질을 측정하는데 사용되는 반면 "비흡수" 기준 파장은 탁도, 기포 또는 오염을 보완하기 위해 사용됩니다.

• Kemtrak DCP007-NIR 농도계는 정밀 광섬유를 사용하여 공정 매체를 통해 정밀하게 초점을 맞춘 단색광을 비추고 광 검출기로 돌아갑니다.

• 공정 매체에서 광 흡수 물질에 의해 야기된 투과 광선의 감쇠는 수학적으로 Beer-Lambert 법칙에 기술되어 있습니다.

• Beer-Lambert 법칙(아래)을 적용하면 시료 농도를 계산할 수 있습니다.

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

* Kemtrak DCP007 광도계는 단순성, 안정성 및 낮은 유지 보수가 중요한 산업 환경에 이상적입니다.

• 컬러 스케일
- 백금 코발트 / APHA / 하젠
- ASTM D-1500
- Saybolt / ASTM D-156
- ICUMSA

• 화학 물질 농도
- 이산화 염소, 차아 염소산염, 염소
- 금속 이온 (예 : 금속 이온) 철, 구리, 크롬, 코발트
- 아로마틱 및 탄화수소

• 누출, 이월 및 인터페이스 감지

Technical Data

Housing
- Stainless steel EN 1.4301 (X5CrNi18-10), AISI 304 (V2A)
- Captive lid screws & external mounting brackets stainless steel
- 244 x 215 x 105 mm (L x W x D)
- IP 65 / EN 60529

Display
- 16 x 4 alphanumeric white on blue dot matrix LCD display
- LED background illuminated
- Measurement updates every second
- LED 1 (green) : Power on
- LED 2 (red) : System fault
- LED 3 & 4 (orange) : Alarm 1 & Alarm 2
- LED 5 (blue) : Clean / Hold

Operation
- 4 push buttons
- Remote HTML/Java interface (TCP/IP connection via Ethernet port)

Software Features :
• Auto gain : Fully automatic photometer gain switching
• Auto zero : Automatically, locally or remotely activated zero
• Calibration : 16 linearization tables for concentration & mA output
• Damping : From 0 to 9999s with noise (air bubble / particle) filter
• Memory : Nonvolatile - all data retained upon power failure
• Security : Alphanumeric password protection

Data Logger
• >17000 data points (timestamp, average, max. & min.), ring buffer
• Configurable log time interval 1s to 24hr

Event Logger
• >16000 events, ring buffer
• Timestamp, alarms, zeroing, cleaning, product change, calibration & system events (power, system warning & error messages)

Automatic Cleaning Control
• Automatic cleaning sequence, triggering dedicated relay output
• Manual trigger or external trigger via digital input
• Configurable automatic cleaning interval, 15min to 2months
• Configurable cleaning duration from 0 to 9999s
• Auto-zero after clean option
• Hold value after clean (to equilibrate) 0 to 9999s

PID Controller
- Control method : Pulse width modulated relay output or 0/4-20mA output
- Control period : 2 - 99s
- Proportional gain : 0.0000 - 999999
- Integral time : 0.0000 - 999999s
- Derivative time : 0.0000 - 999999s

Remote Input
- 5 x Digital input (potential free contact) for :
• Input 1-3 : Product/range selection
• Input 4 : Zero, instant zero, clean or clean & Zero
• input 5 : Hold (freeze output), data log control or light source control

Analogue Input (optional)
- mA or 3-wire PT100
- Range : -20 to 200°C (-4 to 392°F)
- Resolution : 0.07°C (0.126°F)

Light Source
- High performance light emitting diode (LED)
- Wavelength range : 350 - 1050nm
- Full Width-Half Maximum (FWHM) : 10nm
- Central Wavelength (CWL) Accuracy : ±1nm
- Typical lamp lifetime : >100000hrs
- Note : Measurement wavelengths must be factory installed.
Typical specifications provided for 500nm

Photometric Range
- 0.000 - 5AU at 500nm, 10mm OPL

Photometric Accuracy
- ±0.001AU at 1AU

Photometric Noise
- ±0.0001AU at 1AU

Linearity
- ± 0.5% of respective measuring range

mA Output
- 1 x selectable 0 – 20mA / 4 - 20mA (NAMUR, max 21.6mA)
- Optional second mA output
- Galvanically isolated, tested during final inspection to 500 VDC
- Accuracy : < 0.1%
- Resolution : 0.025%
- Load : 0 – 600Ohm

Relay Outputs
- 1 x 1A 240VAC Failsafe output (active when system is ok)
- 2 x 1A 240VAC User configurable (alarm, PID)
- 1 x 1A 240VAC Automatic cleaning control
- Fuses : 4 x 1A (type: MXT), max 100A breaking capacity
- LED status indicators flash when relays are active

Fail-Safe :
- Dedicated relay output, 1A 240 VAC
- mA output value used to signal a system fault (NAMUR <3.6mA or >21.0mA)

Network interface (remote communications) :
- TCP/IP, 10Base-T and 100Base-TX Link
- Connector : RJ45
- Protocol :
1) HTML/Java interface using native protocol over TCP/IP
Software : Web browser with Java version 6 or later
2) MODBUS server (slave) over TCP/IP (V1.1b3 compliant)
Functions : (0x03, 0x04, 0x2B/0x0E - conformity 0x01)

Operating Conditions
- Ambient temperature : 0°C to +50°C (32°F to 122°F)
- Transport : -20°C to +70°C (-4°F to 158°F)

Power Supply
- 100-240VAC, 50-60Hz, & 22 - 30VAC/VDC
- Mains fuse : 1A (type MST), Max breaking capacity 35A

Power Consumption
- 25VA (max.)

Certificates
- ISO 9001 : 2008, CE, ATEX Ex d IIB + H2 T5 IP66 Category II 2 G (option)