전도도 측정을하는 한 가지 방법은 전도성 접촉이라고합니다. 이러한 유형의 측정에서 감지 요소는 프로세스와 접촉하여 센서를 접촉 전극이라고합니다.
전도도는 용액 전극에 담긴 센서 전극 (셀 상수를 구성하는)에 교류 전류를 가하고 결과 전압을 측정하여 측정됩니다. 이 솔루션은 센서 전극 사이의 전기 도체 역할을합니다.
Details
| 모델코드 | FLXA21 | FLXA202 | SC450G |
|---|---|---|---|
| 지역 분류 |
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| 외함 재질 | Plastic (Polycarbonate) | Aluminum alloy die cast with epoxy coating (Standard offering Aluminum alloy die cast with urethane or high anti corrosion coating (available upon request) |
Cast Aluminum with chemically resistance coating; polycarbonate cover with polycarbonate flexible window |
|
하우징 등급 |
IP66/ NEMA 4A/ CSA 3S | IP66 (except Canada), Type 4X (except Canada), Type 3S/4X (Canada) | IP66/ NEMA 4A/ CSA 3S |
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전원 공급 |
2-wire 24VDC, Loop Powered | 2-wire 24VDC, Loop Powered | 4-Wire 110-256 VAC, Mains Power |
| 출력 신호 | Bi-directional HART digital communication, superimposed on mA (4-20mA) signal. | Bi-directional HART digital communication, superimposed on mA (4-20mA) signal. | Two isolated outputs of 4 to 20 mA DC with common negative. |
The model FLEXA™ two-wire analyzer is used for continuous on-line measurements in industrial installations. It offers an option for single or dual sensor measurement, making it the most flexible 2-wire analyzer available. The model FLEXA™ modular-designed series analyzer.
- One analyzer can accept any of 4 types of measurements; pH/ORP, Contacting Conductivity (SC), Inductive Conductivity (ISC) and Dissolved Oxygen (DO)
- Dual sensor measurement on a 2-wire type analyzer pH/ORP and pH/ORP, SC and SC, and DO and DO
- Modular design: replaceable sensor modules
- Redundant system on dual sensor measurement
- Variety of materials of construction: SS or Plastic
- Intuitive easy touch screen operation on 2-wire type analyzer
- Unique HMI menu structure in 12 languages
- Quick setup menu for fast and east measurement operation
- Online Sensor Wellness checking for predictive maintenance
- NEMA 4X / IP66 Enclosure
| Input Specification |
Two or four electrode measurement with square wave excitation, using max. 60 m cable and cell constants from 0.005 to 50.0 cm-1 |
|---|---|
| Input Range | Conductivity: 0 to 2000 mS/cm at 25ºC (77°F) Temperature: -20 to 140ºC (0 to 280°F) |
| Conductivity | 2 µS x K cm-1 to 200 mS x K cm-1 Accuracy: ±0.5% F.S. 1 µS x K cm-1 to 2 µS x K cm-1 Accuracy: ±1% F.S. |
| Resistivity | 0.005kΩ/ K cm-1 to 0.5MΩ/ K cm-1 Accuracy: ±0.5% F.S. 0.5MΩ/ x K cm-1 to 1MΩ/ x K cm-1 Accuracy: ±1% F.S. |
| Temperature | with Pt1000, Pb36, Ni 100 Accuracy: ± 0.3ºC with Pt100, NTC 8k55 Accuracy: ± 0.4ºC |
| Step Response | ≤7 seconds for 90% (for a 2 decade step) |
| Cable Length | Max 60 meters (200 feet). 10 meters (35 feets0 fixed sensor cable + 50 meters (165 feet) WF10 extension cable |
| Transmission Signal | Bi-directional HART digital communication, superimposed on mA (4-20 mA) signal |
| Temperature Compensation | Automatic or manual, for temperature ranges. Reference temp. programmable from 0-100°C or 30-210°F (default 25°C) |
| Calibration | Semi-automatic calibration using pre-configured OIML (KCl) standard tables, with automatic stability check. Manual adjustment to grab sample. |
| Display | Black and white, 213 x 160 pixels LCD with a touch screen |
| Housing | IP66/ NEMA 4A/ CSA 3S IP66 (except Canada), Type 4X (except Canada), Type 3S/4X (Canada) |
| Environment | Ambient Temperature: -20 to 55°C Humidity: 10 to 90% RH at 40°C (non-condensing) |
| Power Supply | Ratings; 17 to 40 V DC |
| Input specification | Two or four electrode measurement with square wave excitation, using max. 60 m cable and cell constants from 0.005 to 50.0 cm-1 |
|---|---|
| Detection method | Frequency, read-pulse position and reference voltage are dynamically optimized. |
| Input ranges | Conductivity: 0.000 μS/cm to 2000 mS/cm Minimum: 1 μS/cm (underrange 0.000 μSx C). Maximum: 200 mS/cm (overrange 2000 mS x C). Resistivity: 0.0 Ω x cm to 1000 MΩ x cm Minimum: 5 Ω x cm (underrange 0 Ω/C). Maximum: 1 MΩ x cm (overrange 1000 MΩ/C). Temperature: Pt1000: -20 to 250°C (0 to 500°F) Pt100 and Ni100: -20 to 200°C (0 to 400°F) NTC 8k55: -10 to 120°C (10 to 250°F) Pb36 NTC: -20 to 120°C (0 to 250°F) |
| Conductivity/Resitivity Accuracy | ≤0.5 % of reading |
| Temperature Accuracy | ≤0.3°C (≤ 0.4°C for PT100) |
| Step Response | ≤4 sec for 90 % (for a 2 decade step) |
| Transmission Signals | Two isolated outputs of 4 to 20 mA DC with common negative. Maximum load 600 Ω. Bi-directional HART digital communication, superimposed on mA 1 (4 to 20 mA) signal. Burn up (21.0 mA) or Burn down (3.6 mA) to signal failure accorded with NAMUR NE43. |
| Temperature compensation | Automatic or manual, for temperature ranges. Reference temp.: programmable from 0 to 100°C or 30 to 210°F (default 25°C). |
| Compensation algorithm | According IEC 60746-3 NaCl tables (default). Two independent user programmable temperature coefficients, from 0 to 3.5 %/°C (°F) by adjustment or calibration. Matrix compensation: with conductivity function of concentration and temperature. Choice out of 13 preprogrammed matrixes. |
| Display | Graphical Quarter VGA (320 x 240 pixels) LCD with LED backlight and touchscreen. |
| Contact Outputs | Four SPDT relay contacts with display indicators. Contact outputs configurable for hysteresis and delay time. |
| Contact Input | Remote range switching to 10 times the programmed range. |
| Power Supply | 85 to 265 V AC ±10 %, 47 to 63 Hz, maximum consumption 10 VA. 9.16 to 30 V DC ±15 %, maximum consumption 10 W. |
자료실
Overview:
To defray energy costs, many industrial plants have their own boilers to generate steam in order to produce a portion of their energy needs. In addition to generating power, the steam may also be used directly in plant processes or indirectly via heat exchangers or steam jacketed vessels.
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