Rosemount Analytical FCL Data sheet
Model FCL Product Data Sheet
LIQ-PDS-FCL
July 2017
Free Chlorine Measuring System
Complete system includes sensor, connecting
cable, analyzer, and flow controller.
Continuous pH correction eliminates expensive
and messy reagents and troublesome sample
conditioning systems.
Measures free chlorine in samples having pH as
high as 9.5.
(1)
Variopol quick-disconnect fittings make
replacing sensors easy.
Choose from two feature-packed analyzers
(1) In some cases, the sensor can be used in samples having pH as great as 10.0.
Consult the factory.
Applications
The Model FCL free chlorine system is intended for the determination of free chlorine in fresh water. Unlike free chlorine analyzers from other manufacturers, the Model FCL does not use
expensive sample conditioning systems or messy reagents to control
pH. Instead, the analyzer automatically compensates for changes in
the pH of the sample. The Model FCL is not intended for the
determination of total chlorine or combined chlorine (like
monochloramine). Nor, can the FCL be used for the deter- mination
of chlorine in seawater.
Features
The Model FCL uses a membrane-covered amperometric sensor. A
polarizing voltage applied to a platinum cathode behind the
membrane destroys any chlorine that diffuses through the
membrane, keeping the concentration of chlorine in the sensor equal
to zero. The current generated by the cathode reaction is
proportional to the rate of diffusion of chlorine through the
membrane. Because the concentration of chlorine in the sensor is
zero, the diffusion rate and the current are proportional to the
concentration of chlorine in the sample.
All amperometric free chlorine sensors respond to changes in pH.
Although free chlorine is a mixture of hypochlorous acid and
hypochlorite ion, hypochlorous acid alone is responsible for the
sensor current. Because the relative amounts of hypochlorous acid
and hypochlorite ion depend on pH, a pH change will cause the
current and the apparent free chlorine concentration to change, even
though the true concentration remained con- stant. Most
manufacturers solve the problem by treating the sample with acid,
which lowers the pH and converts hypochlo- rite ion into
hypochlorous acid. The Model FCL avoids the expense and
inconvenience of sample conditioning by measur- ing the pH and
applying a correction to the raw chlorine sensor signal. The
correction is valid between pH 6.0 and 9.5. Below pH
6.0, no correction is needed. For samples having pH between
9.5 and 10.0, consult the factory.
The Model FCL is available in two options: Model FCL-01 with
manual pH correction and Model FCL-02 with continuous pH
correction. Choose the FCL-01 if the pH varies less than 0.2 or if
pH changes are predictable or seasonal. Choose the FCL-02 if the pH
varies more than 0.2. To provide the continuous pH correction, the
Model FCL-02 requires a separate pH sensor.
Model FCL July 2017
2
www.Emerson.com/RosemountLiquidAnalysis
Maintenance is fast and easy. Replacing a membrane requires no
special tools or fixtures. A screw cap holds the pre-tensioned
membrane in place. Replacing the electrolyte solution takes
only minutes.
Valves, rotameters, and pressure regulators to control sample flow
are things of the past with the Model FCL. A constant head
overflow sampler ensures the correct sample flow to the sensors. To
eliminate wiring hassles, quick-disconnect Variopol cable prewired
to the analyzer is standard.
The Model FCL is available with the choice of two easy to use
analyzers.
Stable free chlorine standards do not exist. The chlorine sensor
must be calibrated using the results of a laboratory test run on a grab
sample.
Specifications – General
Sample requirements:
Pressure: 3 to 65 psig (122 to 549 kPa abs). A check valve in
the inlet prevents the sensor flow cells from going dry if
sample flow is lost. The check valve opens at 3 psig (122 kPa
abs). If the check valve is removed, minimum pressure is
1 psig (108 kPa abs).
Temperature: 32 to 122°F (0 to 50°)
Minimum Flow: 3 gal/hr (11 L/hr)
Maximum flow: 80 gal/hr (303 L/hr); high flow causes the
overflow tube to back up.
Sample Conductivity: >50 μS/cm at 25°C
Process connection: 1/4-in OD tubing compression fitting (can be
removed and replaced with a barbed fitting for use with soft
tubing).
Drain connection: 3/4-in barbed fitting. Sample must drain to
open atmosphere.
Wetted parts:
Overflow sampler and flow cell: acrylic, polycarbonate,
polyester, Kynar
®
(1)
, nylon, silicone
Chlorine sensor: Nor yl
®
(2)
, Viton
®
(3)
, wood, silicon e,
polyethersulfone, polyester, and platinum
pH sensor (3900VP): Stainless steel, glass, Teflon
®
(4)
,
polyphenylene sulfide, EPDM, and silicone
Response time to step change in chlorine concentration:
<80 sec to 95% of final reading for inlet sample flow of 3 gph
(11 L/hr).
Weight/shipping weight:
Model FCL-01: 10 lb/13 lb (4.5 kg/6.0 kg)
Model FCL-02: 11 lb/14 lb (5.0 kg/6.5 kg)
[rounded to the nearest 1 lb. (0.5 kg)]
Specifications
–
Chlorine Sensor
Free chlorine range: 0 to 10 ppm as Cl2. For higher ranges,
consult the factory.
pH correction range: 6.0 to 9.5. For samples having pH
between 9.5 and 10.0, consult the factory. Correction is not
needed if pH < 6.0. For manual pH correction, choose option -
01. For continuous pH correction choose option -02.
Accuracy: Accuracy depends on the accuracy of the chemical
test used to calibrate the sensor.
Interferences: Monochloramine, permanganate, peroxides.
Electrolyte volume: 25 mL (approx.)
Electrolyte life: 3 months (approx.); for best results replace
electrolyte monthly.
Specifications
–
Model 1056 Analyzer
Case: Polycarbonate NEMA 4X/CSA 4 (IP65).
Conduit openings: Accepts PG13.5 or 1/2 in. conduit fittings
Display: Monochromatic back-lit LCD. Main character height
0.6 in (15mm). Display is user-programmable
Languages: English, French, German, Italian, Spanish, Portuguese,
and Chinese.
Ambient temperature and humidity: 32 to 131°F (0 to 55°C);
RH 5 to 95% (con-condensing)
Storage temperature: -4 to 140°F (-20°C and 60°C)
Power: 84-265 Vac, 47.5 to 65.0 Hz, switching, 15 W
Equipment protected by double insulation
(1) Kynar is a registered trademark of Elf Atochem North America.
(2) Noryl is a registered trademark of General Electric.
(3) Viton is a registered trademark of E.I. duPont de Nemours & Co.
(4) Teflon is a registered trademark of E.I. duPont de Nemours & Co
July 2017 Model FCL
www.Emerson.com/RosemountLiquidAnalysis
3
RFI/EMI: EN-61326
LVD: EN-61010-1
Outputs: Two 4-20 mA or 0-20 mA isolated outputs.
Continuously adjustable. Linear or logarithmic. Maximum
load 550 Ω. Output dampening is user-adjustable.
Alarms: Four alarm relays. Any relay can be configured as a fault
alarm
instead
of a process alarm. Each relay can be configured
independently and each can be programmed with interval
timer settings.
Relays: Form C, SPDT, epoxy sealed
Relay Contact ratings:
5 A at 28 VDC or 300 VAC (resistive)
1/8 HP at 120/240 VA
C.
Terminal Connections Rating: Power connector (3-leads):
18-12 AWG wire size. Current output connectors (2-leads):
24-16 AWG wire size. Alarm relay terminal blocks: 18-16
AWG wire size
Hazardous Location Approvals: For more information refer to
the Model 1056 product data sheet 71-1056. Approvals apply
to the analyzer only. The FCL is not suitable for use in
hazardous areas.
Specifications
–
Model 56 Analyzer
Case: Polycarbonate
Display: Full color LCD, 3.75 x 2.20 in. (95 x 56 mm); display can
be customized by the user.
Languages:
English, French, German, Ital ian, Spanish, Portuguese,
Chinese, Russian, and Polish.
Ambient Temperature and
Humidity:
14 to 140°F (-10 to 60°C);
RH 5 to 95% (non-condensing). Between 23 and 131°F
(-5 to 55°C) there is no visible degradation in display
response or performance.
Storage temperature: -4 to 140°F (-20 to 60°C)
Power: 85 to 265 VAC, 47.5 to 65.0 Hz, 20 W
RFI/EMI: EN-61326
LVD: EN-6101-01
Outputs: Four 4-20 or 0-20 mA isolated current outputs;
assignable to measurement or temperature; fully scalable;
maximum load 550 Ω. HART digital signal is superimposed
on output 1.
Alarms and Timers: Four relays, fully configurable as a setpoint
alarm, interval timer, TPC, bleed and feed timer, delay timer,
date and time timer, and fault alarm.
Relays: Form C, SPDT, epoxy sealed.
Relay Contact ratings:
5 A at 28 VDC or 300 VAC (resistive)
1/8 HP at 120/240 VAC
Control features: PID control (analog output) and time
proportional control or TPC (relays) are standard.
Data logger: Data automatically stored every 30 seconds for 30
days; older data removed to make room for new data. The
following data are automatically stored:
Chlorine: date and time, ppm, temperature, raw
sensor current
pH: date and time, pH, temperature, mV, glass impedance, and
reference impedance (if available)
Event logger: Stores up to 300 events with data and time stamp:
faults, warnings, calibration data, calibration results (pass or
fail), power on/off cycles, and hold on/off. Alarm relay
activation and deactivation can also be stored. Older events are
automatically removed to make room for new events.
Data and event downloading: through USB port on front
panel.
Graphical display: Dual graphical display shows measurement
data on the y-axis and time on the x-axis. Y-axis is fully
assignable and scalable. X-axis can be set to one hour, one
day, seven days, or 30 days.
Digital communications: HART digital communications is
standard.
Hazardous Location Approvals: For more information refer to
the Model 56 product data sheet 71-56. Approvals apply to
the analyzer only. The FCL is not suitable for use in
hazardous areas.
Loading...