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Features:
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Long term, stable measurement using a sensor which contains a contact-free swing rotary residual chlorine electrode (includes beads cleaning system).
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Transmitter with built-in microcomputer includes a full range of diagnostic functions including low flow rate detection, calibration error, etc
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Non-reagent system eliminates the need for regular reagent supply.
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Stable and reliable operation can be further enhanced by adding optional auto-calibration and auto-cleaning functions.
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Standard Specifications:
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| Product Name: |
Reagent less Free Chlorine. |
| Model: |
CLF-110. |
| Measurement Object: |
Free available chlorine (free chlorine) of water.
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| Measurement Method: |
Polarography by eccentric rotary micro-electrode.
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| Sensor: |
CLR-20 swing rotary (with built-in Au-Ag temperature compensation resistor) sensing electrode, type 2128.
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| Measurement Range: |
Select one of the following:-
0~1/2, 0~2/3, 0~1/3 mg/l (ppm units are also available if specified).
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| Measurement Range Switching: |
Manual or remote switching (client to specify).
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| Indication: |
Digital display (LCD, 0.00~10.00). |
| Output Signal: |
4~20mA DC, maximum load 600W, isolated output.
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Contact Switching Outputs:
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Range indication, under maintenance, power fail, temperature fault, in calibration mode *1, calibration error *1, analyser fault (contact rating: 30V DC, 0.1A). (*1: available with auto-cal option only).
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High concentration, low concentration (contact rating: 125V AC, 1A).
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Contact Switching Inputs:
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Range switching (open contacts=low range, closed contacts=high range) (contact rating: 30V DC 0.1A).
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Start calibration (contact closed for 100mS or longer) (contact rating: 30V DC, 0.1A), only available with auto-cal option.
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Measurement Characteristics:
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This instrument is suitable for measurement of clear, purified water in water distribution systems or from hydrants etc.. There are pH and conductivity restrictions for the sample as explained later in these specifications. In addition, if combined chlorine exists, it will cause a measurement error of 1/5~1/4 of the concentration. However, this characteristic does not normally cause any problems, since purified water contains only negligible concentrations of combined chlorine. For applications outside these constraints or where increased accuracy is required, then a reagent-type residual analyser should be used.
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Sample Conditions:
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| pH: |
6.5~7.5 |
| Conductivity: |
80mS/cm or greater. |
| Temperature: |
0~+40°C (no freezing). |
| Pressure: |
0.05~0.5 MPa (0.5~5 kgf/cm2). |
| Consumption: |
0.5~1 l/min. (flow rate of sample to be introduced into analyser: 0.1 l/min, approx.).
|
| Wetted Materials: |
Hard PVC, Teflon tubing, polyethylene tubing. |
| Electrode Cleaning: |
Electrode rotation with beads cleaning system. |
| Power Requirements: |
100V AC ±10%, 50/60Hz. |
| Power Consumption: |
Approx. 50 VA (main body of instrument; approx. 20VA, with calibration; approx. 50VA).
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| Construction: |
Indoor, self-standing, drip-proof. |
| Operating Temperature Range: |
-5~+50°C. |
| Operating Humidity Range: |
<85% RH. |
| Main Materials: |
| Transmitter: |
ADC12 (Al. die cast). |
| Sensor: |
A1050P (Al.). |
| Frame: |
A1100P (Al.). |
| Paint Color: |
Transmitter/sensor: Pantone 537C (Equivalent to Munsell 5PB8/1).
|
| Frame: |
Grey (Equivalent to Munsell N6). |
| Weight: |
Approx. 20kg.
Mounting Floor standing. |
| Piping Connections: |
Sample inlet: VP16 pipe. |
| Drain: |
VP25 pipe. |
| Wiring Connections: |
Five glands for 6mm~12mm diameter cable entries. |
| Performance: |
| Repeatability: |
±2%FS (with chlorine standard solution). |
| Linearity: |
±5%FS (with chlorine standard solution). |
| Response Time: |
Within 2 minutes for 90% response
(measured from sample inlet at flow rate of 1 l/min).
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| Options : |
• Automatic Calibration Function
Calibration Method: |
Zero: water filtered by active charcoal filter is introduced. |
| Span: |
None. |
| Calibration Start Mode: |
| Manual: |
Calibration starts by keypad command. |
| Auto: |
Calibration starts by internal timer. |
| Remote: |
Calibration starts by external contact input signal (when calibration period is set at 0 hr).
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| Calibration Period: |
0~999 hr. variable (Initial value 15 mins). |
| Calibration Duration: |
Approx. 10 mins. |
| Stand-by Time After Calibration: |
0~30 min. variable (Initial value15 mins). |
| Output Hold Time During Calibration: |
Calibration time + stand-by time. |
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Unit for Increasing Conductivity (Model CLZ-2):
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| This unit increases the conductivity of the water sample by adding salt tablets. This is required for low conductivity samples. |
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Calibration Unit:
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| This unit is used for manual zero operation and consists of an activated charcoal filter, a calibration liquid tank and a built-in manual switching valve. |
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Principle of Operation:
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This instrument consists of a sensor and transmitter mounted on a self-standing frame. The sample flows to the measurement cell of the sensor. In the measurement cell, a fixed voltage is applied between a sensing electrode and a counter electrode to achieve electrolytic reduction.
The reduction current (diffusion current) that flows across the two electrodes is proportional to the free chlorine concentration present between the electrodes. This current is amplified and the represents the free chlorine concentration.
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pH & Conductivity Characteristics of Sample
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External Dimensions (mm)
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General Tolerance ±10
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| Item |
Description |
Remarks |
| 1. |
Sensor
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| 2. |
Measurement cell |
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| 3. |
Flow path switching valve |
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| 4. |
Sample flow adjustment valve |
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| 5. |
Sample by-pass valve |
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| 6. |
Activated charcoal filter |
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| 7. |
Pressure reduction valve |
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| Item |
Description
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Remarks
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| A |
Sample inlet |
VP16 |
| B |
Drain port |
VP25 |
| C |
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| D |
Condensate outlet |
RC ½ (with plug) |
| E |
5 X Cable entries |
Gland for 6mm~12mm OD cable. |
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