Residual Chlorine Analyzer (Reagent Type) RC400G
The RC400G residual chlorine analyzer employs a polarographic system that uses rotating platinum electrodes to provide continuous online measurement of residual chlorine concentration. By appropriate use of reagents, it is possible to separate residual chlorine (free chlorine + combined-chlorine) from free chlorine for measurement.
The RC400G is an intelligent residual chlorine analyzer that makes extensive use of microprocessors. Its design is based on the know-how gained through Yokogawa's many years of experience with residual chlorine analysis.
Description：
Features
Simple, one-touch calibration. Automatic sensor self-diagnostics (zero point, slope, response) during calibration.
Output range can be set in the field in case when the span is 1 mg/l or more. Remote switching 2-range capability is available.
Line-segment function available for output signal.
Simple verification of applied voltage/current characteristics (Plateau characteristic) between electrodes. Allows detailed knowledge of sensor characteristics for the target application to be obtained.
Improvements to rotating electrodes and glass bead cleaning have been added for even more effective automatic continuous cleaning.
Waterjet cleaning can be applied for the purpose of particularly dirty applications.
Easily maintained (easy-to-clean) cell construction.
Available for special version (for free chlorine measurement) designed to cope with very high concentrations of combined chlorine.
Specifications
| Measurement object | Free chlorine or residual chlorine (total chlorine) in water |
| Measurement method | Rotating electrode type polarographic system |
| Measurement range | 0 to 10 mg/l (mg/l used as concentration units per JIS K0101 and municipal water test methods) |
| Output range | Can be freely set within ranges with spans of 1 mg/l or greater |
| Output signal | 4 to 20 mA DC (load resistance, 550 Ω Max.) or 1 to 5 V DC (output resistance, 300 Ω Max.) |
| Sample conditions | Temperature: 0 to 50℃ pH: 3 to 9 Flow: 1 to 4 l /min, for pure water or municipal water application. 5 to 10 l /min, for raw water or sea water application. 10 to 20 l /min, for secondary sewage treatment application. Pressure: 20 to 500 kPa |
| Electrodes | Measuring electrode: Rotating platinum electrode Reference electrode: Platinum electrode (built-in Pt1000 Ω RTD) |
| Ambient Temperature | -5 to 55℃ |
| Ambient Humidity | 5 to 95 % RH (non-condensing) |
| Installation | Indoors (A separate rainproof cover is required for outdoor installation. Avoid direct sunlight.) |
| Power Supply | 100/110/220 V AC ±10 %, 50/60 Hz |
| Weight | Approx. 65 kg (for pure water) |
Performance
(Percent display is computed with respect to whichever of output range 1 or output range 2 has the highest upper range value)
| Linearity | ±3 % |
| Repeatability | 2 % |
| Drift | Zero drift: ±1 %/month Max. Span drift: -5 %/month Max. |
| Response time | Displayed as 90 % response time For pure water: Approx. 2 min For raw water (1-cylinder): Approx. 4 min For raw water (2-cylinder): Approx. 4 min |
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