The Model FCLi is a complete system for the determination of free chlorine in fresh water. It consists of an analyzer (choice of Model 54eA or Model 1056), a 498CL-01 pH-independent free chlorine sensor, an optional pH sensor, and a constant head flow controller. The analyzer and flow controller are mounted on a back plate, and quick disconnect Variopol sensor cables are pre-wired to the analyzer, making installation and startup fast and easy.

Unlike free chlorine sensors from other manufacturers, the 498CL-01 requires neither sample pretreatment nor pH correction. Instead, an acidic internal solution lowers the pH of the sample as it enters the sensor, converting hypochlorite to hypochlorous acid, the only form of free chlorine amperometric sensors can measure. The sensor response is practically independent of pH. Between pH 6.5 and 10 the chlorine reading decreases less than 4% per unit increase in pH. Below pH 6.5 the change is less than 1%.

GENERAL
Sample requirements:
   Pressure: 3 to 65 psig (122 to 549 kPa abs)
      Inlet check valve opens at 3 psig (122 kPa abs).
      Without check valve pressure is 1 psig (108 kpa abs)
   Temperature: 32 to 122°F (0 to 50°)
   Flow: 2-80 gal/hr (7.6-303 L/hr)
   Sample Conductivity: >10 μS/cm
   Process connection: 1/4" OD tubing compression fitting
   Drain connection: 3/4" barbed fitting. Sample must drain to open atmosphere.
   Wetted parts: acrylic, polycarbonate, polyester, Kynar1, nylon, silicone, PVC,
      Viton2, silicone, polyethersulfone, polyester, copper, Tefzel2, glass, ceramic
   Response to step change in chlorine: <120 sec to 90% of final reading
       for inlet sample flow of 2 gph (7.6 L/hr)
   Weight/shipping weight:
       Model FCLi-01: 10 lb/13 lb (4.5 kg/6.0 kg)
       Model FCLi-02: 11 lb/14 lb (5.0 kg/6.5 kg)

SENSOR
Free chlorine range: 0 to 20 ppm as Cl2. For higher ranges, consult the factory.
Accuracy: Accuracy depends on the accuracy of the chemical test used to calibrate the sensor
Linearity (0-20 ppm): 1% per IEC 60746
Linearity (0-2 ppm):   ±0.05 ppm following calibration at 2 ppm
Sensitivity to pH: Between pH 6.5 and 10, sensor signal changes <4% per unit change in pH. Below pH 6.5 the change is <1%. per unit change in pH.
Interferences: Monochloramine, dichloramine, and permaganate
Electrolyte life: 3 months (approx.)

1056 ANALYZER
Case: Polycarbonate NEMA 4X/CSA 4 (IP65).
Display: Monochromatic back-lit LCD. Main character height 0.6 in (15mm). Display is user-programable
Languages: English, German, Italian, Spanish, French, Portuguese
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: 85 to 265 Vac, 47.5-65.0 Hz 15 W.  Equipment protected throughout by double insulation.
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 ohms. Output dampening with time constant of 5 sec is userselectable.
Alarms: Four alarm relays for chlorine, pH or temperature. Fully programmable. Any alarm can be configured as a fault alarm.
Relays: Form C, SPDT, epoxy sealed

54EA ANALYZER
Case: Epoxy-painted cast aluminum, NEMA4X (IP65).
Display: Three-line, back-lit, dot matrix LCD. First line is measurement reading. Second line is temperature and current output. Third line is user-selectable.
Character heights: 1st line - 0.6 in. (16 mm) , 2nd and 3rd lines - 0.3 in. (7 mm) .
Ambient Temperature and Humidity: 0 to 50°C (32 to 122°F). 95% (maximum) non-condensing.  Analyzer can be operated between -20 and 60°C (-4 to 140°F) with some degradation in display quality.
Power: 100-127 Vac ± 10%, 50/60 Hz ± 6%, 8 W
            200-253 Vac ± 10%, 50/60 Hz ± 6%, 8 W
RFI/EMI: EN-61326
LVD: EN-61010-1
Outputs: Two 4-20 mA or 0-20 mA isolated outputs. Continuously adjustable. Output dampening is user-selectable. Maximum load at 115/230 Vac is 600Ω. Maximum load at 100/200 Vac is 550Ω.
Alarms: Three alarm relays for chlorine, pH or temperature. Fully programmable. Fourth relay for analyzer/sensor fault.
Relays: Relays 1-3: Form A, SPST, epoxy sealed
             Relay 4: Form C, SPDT, epoxy sealed
        Resistive Inductive
  28 Vdc   5.0       3.0
 115 Vac   5.0       3.0
 230 Vac   5.0       1.5