Automatic Water Quality Analyzer for City Water (MWB4-72) is TOA-DKK Corporation's modern and potential product for continous monitoring water quality at faucet feed line or water receiving tank of a building.
*Measeasurements:
+ Turbidity
+ Color
+ Residual Chlorine
+ Electric Conductivity
+ pH
+ Temperature
+ Water Pressure
MWB4-72 also delivers high reliability, durability, and excellent maintainability.
Currently, GK Finechem Vietnam Co., Ltd is the official distributor of TOA-DKK for MWB4-72 in Vietnam.
| Product name | Compact City Water Analyzer |
| Model | : MWB4-72 |
| Objects measured | : Three basic items (turbidity, color, and |
| residual chlorine), electric conductivity, | |
| pH, temperature, and pressure | |
| Measurement | : Ability to switch between two ranges for |
| range switching | both turbidity and color measurements. |
| Display | : Color LCD touch panel |
| Temperature | : 0 to 40°C for residual chlorine, EC, and |
| compensation range | pH |
| Response time | : 90% response within three minutes |
| Operating power | : 100 to 240V AC ±10%, 50/60Hz |
| Power consumption | : Approx. 40/55VA (100/240V AC), max. |
| of approx. 83/108 VA (100/240V AC) | |
| Transmission | : DC 4 to 20 mA, isolated |
| output | ( Negative (-) side is common.) |
| Load resistance | : 600Ω or less |
| Contact switching | : Alarm 1; General alarms (measured value |
| output signals | High-High/Low-Low limit alarm, light source |
| error, residual chlorine motor error, sensor | |
| error, and start-up mode error) | |
| Alarm 2; General alarms (concentration | |
| upper/lower limit alarm, water temperature | |
| compensation error, and auto calibration error) | |
| Maintenance; When in ST-BY mode | |
| Event; During auto cleaning, during auto | |
| calibration, and during problem diagnosis | |
| (Contact capacity for all of the above; 24 | |
| VDC 0.2A resistance load)) | |
| Power cut off; The contact is closed when | |
| a power failure occurs. | |
| (Contact capacity; 30 VDC 0.2A | |
| resistance load)) | |
| Contact switching | : Cleaning command; When the closed |
| input signals | contact receives, cell window cleaning |
| starts (turbidity / color).Start cell window | |
| cleaning (turbidity / color) | |
| Calibration request; When the closed | |
| contact receives, automatic zero | |
| calibration starts (turbidity / color / residual | |
| / residual chlorine).Start automatic zero | |
| calibration (turbidity / color / residual chlorine) | |
| (Resistance load; 200Ωor less, Pulse | |
| duration: 500mS or greater) | |
| Communication | : RS232C interface or RS485 interface |
| system | (isolated) |
| Communication speed; 9600 BPS | |
| Synchronous system; Start-stop | |
| synchronization | |
| Control system; Half-duplex | |
| communication system | |
| One line for communication (dedicated | |
| cable or connector), one line for | |
| maintenance (D-SUB connector) | |
| Save functionality | : Data such as measurements can be |
| transferred to a memory card.(Compact | |
| Flash,CF) They can also be processed by | |
| a computer. | |
| One minute measurement values can be | |
| stored in 3-month intervals, and one hour | |
| values can be stored in 1-year intervals. | |
| Sample water | : No suspension or stagnation. |
| conditions | Quality; Ensures that the water quality |
| (excluding the items below) satisfies the water | |
| quality standards set by the Water Law or falls | |
| within the measurement range of this unit. | |
| Temperature; 0 to 40°C (no freezing) | |
| Pressure; 0.05 to 0.75MPa | |
| pH; 5.5 to 8.6 pH (maximum fluctuations; 1pH) | |
| EC; 8 mS/m (80µS/cm) or greater | |
| Flow rate; 50 to 100 mL/min | |
| Sample | : 5m3/month or less (9m3/month, including |
| consumption | a by-pass flow of 100 mL/min) |
| Wetted part materials | : Polyurethane, PP, acrylic, stainless steel, |
| FKM, etc. | |
| Piping end connection | : Sample water inlet; Rc 1/4 |
| Drain outlet; Rc 1/4 | |
| Calibration solution inlet; Rc 1/4 | |
| Air purge; Rc 1/4 | |
| Installation | : Mounted on a wall or rack |
| Wiring end connection | : Two water-proof connectors |
| A power supply cable and I/O signal | |
| cable (3-meter) are also included. | |
| Ambient conditions | : 0 to 40°C (no freezing), 85% RH or less |
| (no condensation) | |
| Weight | : Approx. 11 kg |
| Construction | : Indoor installation (IP43 equivalent) |
| Case material | : Aluminum |
| Color | : Light gray (Munsell 5PB 8/1 equivalent) |
| Automatic calibration | : Zero calibration for turbidity, color, and |
| residual chlorine. The internal timer and | |
| an external contact signal are used to | |
| start calibration. | |
| (Zero water is prepared by filtering sample | |
| water through a zero water filter.) | |
| Calibration cycle setting; 0 to 24 hours | |
| (freely specified) | |
| Calibration time; Approx. 13 min. (fixed) | |
| Transmission output hold time during | |
| calibration; Calibration time approx. 13 | |
| min. + 9 min. (fixed) | |
| Automatic cleaning | : The internal timer and an external contact |
| signal are used to start backwashing (by | |
| draining the water) to clean the cell | |
| window for turbidity and color measurements. | |
| Cleaning cycle setting: 10, 15, 20, 30, or | |
| 60 min. | |
| Transmission output hold time during | |
| cleaning; Cleaning time approx. 2 min. + 1 | |
| min. (fixed) | |
| Beads cleaning of residual chlorine | |
| electrode by self-rotation | |
| Options | : Indoor self-standing frame (preassembled, piping pre-installed) |
| Outdoor cubicle (temperature-controller | |
| included) | |
| Water sampling unit for abnormal time | |
| Internal leakage detection unit |
