Introduction This user’s manual describes the specifications, installation, operation, maintenance, and troubleshooting for Model FC500G Free Available Chlorine Analyzer. Read this manual thoroughly to understand the contents before operating the equipment. Notes on Hardware Appearance and Accessories Check the following when you receive the product: •...
The product is provided on an “as is” basis. YOKOGAWA shall have neither liability nor responsibility to any person or entity with respect to any direct or indirect loss or damage arising from using the product or any defect of the product that YOKOGAWA can not predict in advance. Trademark Acknowledgments •...
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If we replace the product with a new one, we won’t provide you with a repair report. l Yokogawa warrants the product for the period stated in the pre-purchase quotation Yokogawa shall conduct defined warranty service based on its standard. When the customer site is located outside of the service area, a fee for dispatching the maintenance engineer will be charged to the customer.
Toc-1 Model FC500G Free Available Chlorine Analyzer (Non-Reagent Type) IM 12F5A2-01E 5th Edition CONTENTS Introduction ......................i Safety Precautions ..................ii OVERVIEW ....................1-1 Standard Specifications ................... 1-2 Model and Suffix Codes ................... 1-4 External Dimensions ..................1-5 Measuring Principle ..................1-6 COMPONENTS AND FUNCTIONS ............
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Toc-2 CALIBRATION ................... 5-1 Zero Calibration ....................5-1 5.1.1 Zero Calibration Procedure Using the Open Input Circuit Method ..5-1 5.1.2 Zero Calibration Procedure Using Chlorine-Free Water Method ..5-1 Span Calibration ....................5-2 5.2.1 Span Calibration Procedure Using the Sampling Method ....5-2 5.2.2 Span Calibration Procedure Using Standard Solution Method ..
<1. OVERVIEW> OVERVIEW Model FC500G Free Available Chlorine Analyzer (Non-Reagent Type) is used for continuous measurement of free available chlorine in tap water distribution. This analyzer consists of a detector and a converter as shown in Figure 1.1. This chapter describes the FC500G free available chlorine analyzer specifications and its measuring principle.
Measuring System: Polarographic method using rotating electrode Measuring Ranges: 0 to 1 / 0 to 2 / 0 to 3 mg/L (Model FC500G-1) 0 to 5 / 0 to 10 mg/L (Model FC500G-5) (Air purge is necessary.) Indication: Digital (3 1/2 LCD) Output Signal: 4 to 20 mA DC (Load resistance: Maximum 500 Ω)
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<1. OVERVIEW> Response Time: Approximately 2 minutes (time required to obtain a value within 90% of final value) Ambient Temperature Influence: ±0.5% of full scale/10°C Power Voltage Fluctuation Influence: ±0.5% of full scale/10% of rated voltage Sample Solution Temperature Compensation Error: ±3% of full scale/5 to 35°C pH6.5 pH7.5...
<1. OVERVIEW> Model and Suffix Codes Model Suffix Code Option Code Description FC500G ���������������������������������� ���������������������� Free Available Chlorine Analyzer Range 0 to 1 / 0 to 2 / 0 to 3 mg/L Switchable ���������������������� ���������������������� 0 to 5 / 0 to 10 mg/L Switchable Output signal ����������������������...
(Pt1000Ω) incorporated in the counter electrode. Figure 1.5 shows the block diagram for the FC500G free available chlorine analyzer (non- reagent type) operation. The analyzer determines the free available chlorine concentration by applying an applied voltage corresponding to the diffusion current between the indicator and counter electrodes and by applying temperature compensation to the diffusion current.
Electrode assembly Cell motor A motor for rotaing the indicator electrode at a constant speed. Air purge piping connection port (for FC500G-5) Measuring tank Sample inlet Indicator electrode Counter electrode (rotating elecrtrode) (Pt1000Ω sensor incorporated)
<2. COMPONENT NAMES AND FUNCTIONS> Converter Figure 2.2 shows the converter component names and their functions. Figure 2.2 is a figure with the cover removed. Measuring range selection should be performed in this state. MEAS / CHECK selection switch For converter checking, Zero calibrator select CHECK position.
Installation 3.1.1 Location Install the FC500G free available chlorine analyzer (non-reagent type) in a location which meets the following conditions: ● Free from rain water such as an indoor location or in a cabinet ● Low vibration ●...
3.2.2 Air Purge Piping Make the air purge piping only when the FC500G-5 free available chlorine analyzer is used. The air purge piping connecting port (1/8 NPT female) is located at the electrode assembly. Exercise care in piping because the electrode assembly must be removed in implementing inspection or maintenance (see Figure 3.2).
<3. INSTALLATION, PIPING, AND WIRING> Wiring Make wiring for power supply and output signal. Figure 3.3 shows the symbols on the converter terminals and the types of wiring to be connected. Terminal board TM1 (M4 screw) G L1 L2 ME RE T1 T2 SG G C1 C2 Detector signal 500Ω...
<4. OPERATION> OPERATION This chapter chiefly describes the preliminary work to be performed prior to putting into operation. Preparation for Operation 4.1.1 Inspection of Piping and Wiring Status Confirm that wiring and piping are made properly. 4.1.2 Fill with Glass Beads for Electrode Polishing Put glass beads (accessories) for cleaning the indicator (rotating) electrode into the beads case in the measuring tank in the following procedure: (1) As shown in Figure 4.1, mount the electrode assembly to the holding stud.
Table 4.1 Switch Setting Corresponding to Measuring Range DIP switch position Measuring Model range 0 to 1 mg/l FC500G-1 0 to 2 mg/l 0 to 3 mg/l 0 to 5 mg/l FC500G-5 0 to 10 mg/l J5 jumper see Figure 4.5 Figure 4.4...
<4. OPERATION> NOTE For the FC500G-1, measuring ranges of 0 to 5 and 0 to 10 mg/l cannot be used. For the FC500G-5, measuring ranges of 0 to 1, 0 to 2, and 0 to 3 mg/l cannot be used.
<4. OPERATION> Start-Up 4.2.1 Supplying Sample Water <Sample inlet valve is not provided> Confirm that the sample water pressure is within the range of 1 to 30 kPa and supply sample water at the flow rate of 0.1 to 2.5 l/min. After supplying sample water, confirm that the sample water level does not contact the top of the measuring tank.
If the FC500G-1 free available chlorine analyzer is used, confirm that the “measuring range” selection jumper is set as shown in Figure 4.7 (1). For the FC500G-5 free available chlorine analyzer, confirm that the jumper is set as shown in Figure 4.7 (2).
<5. CALIBRATION> CALIBRATION Perform zero and span calibration when the analyzer is to be initially started up and also when re-operated after prolonged shutdown. During operation, perform span calibration periodically (approx. once a month). When span is to be calibrated, first polish the indicator electrode (see subsection 6.1.1) and then perform running- in operation for approx.
<5. CALIBRATION> Span Calibration There are two span Calibration methods: “sampling method’’ using which calibration is performed based on the manually analyzed free available chlorine concentration of sample water, and the “standard solution method” which allows calibration using a standard calibration solution having a free available chlorine concentration of approximately 80 % of the measuring range.
<6. INSPECTION AND MAINTENANCE> INSPECTION AND MAINTENANCE To continue good operating status, perform inspections and maintenance as shown in Table 6.1. Determine the implementation cycle in accordance with the individual operation conditions. Table 6.1 is a guide for the implementation cycle. Table 6.1 Inspection and Maintenance Items and Implementation Cycle Inspection and maintenance item...
<6. INSPECTION AND MAINTENANCE> CAUTION Do not touch the rotating shaft brush, slip ring, or the indicator electrode surface. (7) Mount the electrode assembly cover and restore the electrode assembly in the measuring tank. Tightly secure the assembly using the two fixing screws. (8) Turn the converter power switch ON and confirm that the indicator electrode revolves normally.
The following is the replacement procedure: However, in principle, replacement should be entrusted to Yokogawa service personnel. (1) Turn OFF the converter power switch. (2) Remove the electrode assembly cover. Remove the brush. The brush is secured using two securing screws (one of them also serves for the wiring terminal).
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<6. INSPECTION AND MAINTENANCE> (5) Mount the two pulleys and the belt in the reverse procedure. Note: If the belt is replaced, perform the procedure described in the following steps (6) and (7) without fail. (6) Loosen the four mounting screws of the (acrylic) holder that secures the rotating shaft. Set a spring balance to the hole under the rotating shaft slip ring and pull the shaft in the direction of applying tension to the belt.
<6. INSPECTION AND MAINTENANCE> Electrical System 6.2.1 Span Calibration Perform span calibration at the rate of once every one or two weeks during the initial operation start period and check the sensitivity changes owing to indicator electrode contamination or the like to establish a reference for determining the calibration period.
1. The load resistance is larger than 1. Adjust the load resistance to 500 Ω or less. output 500 Ω. 2. Electrical circuit failure 2. Contact Yokogawa. The indicator 1. The belt is broken. 1. Replace the belt. electrode does 2.
(2) Increasing the brush contact pressure Turn off power to the FC500G. Loosen the lock screw next to the contact pressure adjusting screw and then the 2 fixing screws for the brush mounting bracket. Turn the contact pressure adjusting screw in 1/2 turn.
Revision Information Title : Model FC500G Free Available Chlorine Analyzer (Non-Reagent Type) Manual No. : IM 12F5A2-01E July 2018/5th Edition Revision according to the suppliment Added EMC(Australia and New Zealand) (p.1-2) Note (p.6-2) Revised description (p.3-3) Aug. 2012/4th Edition Page layout changed All page layout changed by the standard template;...
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