Reagent less
Free Chlorine Analyser:
Model CLF-110
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|
The
main applications for this
instrument are for the measurement
of free available chlorine
concentration in feed water at
filtration plants, pumping stations
and end-of-pipe distribution points. |
| |
Features:
|
-
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:
|
| Product Name: |
Reagent less
Free Chlorine. |
| Model: |
CLF-110. |
| Measurement Object: |
Free available chlorine (free chlorine) of water.
|
| Measurement Method: |
Polarography by eccentric rotary micro-electrode.
|
| Sensor: |
CLR-20 swing rotary (with built-in Au-Ag temperature compensation resistor) sensing electrode, type 2128.
|
| 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).
|
| Measurement Range Switching: |
Manual or remote switching (client to specify).
|
| Indication: |
Digital display (LCD, 0.00~10.00). |
| Output Signal: |
4~20mA DC, maximum load 600W, isolated output.
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|
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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).
-
High concentration, low
concentration (contact
rating: 125V AC, 1A).
|
|
Contact
Switching Inputs:
|
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Range switching (open
contacts=low range, closed
contacts=high range)
(contact rating: 30V DC
0.1A).
-
Start calibration (contact
closed for 100mS or longer)
(contact rating: 30V DC,
0.1A), only available with
auto-cal option.
|
| |
Measurement
Characteristics:
|
|
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.
|
| |
Sample
Conditions:
|
| 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).
|
| 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).
|
| 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).
|
| 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. |
|
| |
Unit
for Increasing Conductivity (Model
CLZ-2):
|
| This unit increases the
conductivity of the water sample by
adding salt tablets. This is
required for low conductivity
samples. |
| |
Calibration Unit:
|
| 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. |
| |
Principle
of Operation:
|
|
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.
|
| |
pH
& Conductivity Characteristics
of Sample
|
External
Dimensions (mm)
|
General
Tolerance ±10
|
| Item |
Description |
Remarks |
| 1. |
Sensor |
|
| 2. |
Measurement cell |
|
| 3. |
Flow path switching valve |
|
| 4. |
Sample flow adjustment valve |
|
| 5. |
Sample by-pass valve |
|
| 6. |
Activated charcoal filter |
|
| 7. |
Pressure reduction valve |
|
| Item |
Description |
Remarks |
| A |
Sample inlet |
VP16 |
| B |
Drain port |
VP25 |
| C |
|
|
| D |
Condensate outlet |
RC ½ (with plug) |
| E |
5 X Cable entries |
Gland for 6mm~12mm OD cable. |
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