For Pure Water and Recycled Water Applications TOC-780
The TOC-780 is a high-sensitivity, automatic TOC analyzer which quickly and accurately measures the total organic carbon content of pure water, and water from rivers and other sources, in either online or offline mode.
This system is designed to achieve superior operability and save space, based on the previous TOC-700 Series which achieved high-speed response (90% response within 5 min) by employing a continuous measurement system developed using Toray Engineering's proprietary technology.
Features
- TOC absolute value can be measured using system blank and dilution water correction for calibration liquid.
- Auto zero and an automatic diagnosis function enable stable measurement over the long-term.
- The system employs the wet UV oxidation/CO2 detection system for continuous measurement and high-speed response.
- Applicable to a wide range of samples, from pure water to river water.
Principle of Measurement
After inorganic carbon is removed from sample water using an IC scrubber, organic carbon is oxidized and converted to carbon dioxide by adding an oxidant and irradiating with powerful UV rays in a UV reactor. Concentration of the converted carbon dioxide is measured with an infrared analyzer, and the TOC value is obtained from the calibration curve for carbon dioxide and TOC stored beforehand in the signal processing unit.
Specifications
| Measurement range | TOC-780H ： 0-1 / 0-10 mg/l 0-5 / 0-50 mg/l *1 0-10 / 0-100 mg/l *1 TOC-780L： 0-100 / 0-500 µg/l |
|---|---|
| Dilution function | — |
| Stream switching function | — |
| Measurement cycle | Automatic continuous measurement |
| Measurement method | Inorganic carbon removal: Automatic continuous acidic aeration method Total carbon measurement: Automatic continuous low-temperature wet UV oxidation - infrared analysis method |
| Calibration method | Span calibration: Manual Zero calibration: Manual and automatic calibration |
| Conversion function | — |
| Washing | — |
| Range setting | Manual setting, remote setting and automatic switching |
| Construction | Standalone console, with casters |
| Dimensions | 602W × 400D × 1300H mm |
| Weight | Approx. 140 kg |
| Standard liquid | Potassium hydrogen phthalate aqueous solution |
| Repeatability | Within ±2 % of full scale |
| Zero stability | Within ±2 % of full scale/day |
| Span stability | Within ±2 % of full scale/day |
| Ambient temperature variation | Within ±2 % of full scale/5 °C |
| Measurement value output | External output: DC 4-20 mA Range ID signal no-voltage contact: AC 125 V, 2 A |
| Error alarm indication | LED display, Closed contact output in case of error (AC 125 V, 2 A) |
| Alarms | Upper/Lower limits for measured value Out of carrier gas (Option) No sample (Option) Out of reagent (Option) |
| Sample conditions | Online measurement: 0.02-0.3 MPa, 30 ml/min or higher Offline measurement: Normal pressure, 500-1000 ml/3 times |
| Reagents/Utilities | Reagents: Phosphoric acid solution 20-25 l/month Sodium persulfate solution 20-25 l/month *2 Carrier gas: Nitrogen gas, Pressure 0.2-0.7 MPa Consumption 60-78 Nm3/month |
| Power | AC 100 V ±10 V 50/60 Hz Approx. 500 VA |
| Set up conditions | Indoors 0-40 °C during operation (Temperature gradient 10 °C/hour or less) 45%-85%RH (No condensation) |
Specifications are subject to change due to product improvements.
*1 Available as an option.
*2 Used only with TOC-780H.
