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32 

 

Fluoride Sensor Specifications 

FX-300 Integrated Fluoride Ion Selective Sensor Specifications Twist Lock Mounting 

Part 
Number:  

SF-8T-UL-10  

1" MNPT Twist Lock Immersion Integrated, Fluoride Ion Selective Sensor for use in high pH Applications 

Recommended Applications:

 Fluoride ion concentration in aqueous solution from drinking water 

 

through waste water. Not suitable for use in etching 
solutions.  

Special Features:

 Crosslinked polymer in the reference system is resistant to heat, solvents and to 

 

most chemicals. Sensor holds an excess of KCl, assuring saturation at all temperatures and extending  
the life of the 
sensor. 

The construction of the sensor permits easy access to the sensing and reference surfaces for 

cleaning or inspection. 

General Specifications: 

Concentration 
Range:  

1 to 10

-6

 Molar, 19,000 to 

0.019 ppm 

Lowest Limit of Detection  

5 X1 0

-8

 Molar, .001 ppm 

pH Range:  

5.5 to 9.5 pH (continuous), intermittent up to 11 pH with measuring crystal degradation 

Temperature 
Range: 

 5 to 50

 o 

C 

Temperature Compensation: 

Fast Temp PT1000 for 
variable temperature 
conditions 

Pressure 
Range:  

1 to 20 psig (6.9 to 138 kPag) 

Body 
Material:  

Ultem (Poly-Ether-Imide) 

Junction 
Material:  

Kynar (Poly-Vinylidene-Fluoride) 

Cable: RG 174/U Coaxial (without preamplifier) 
Connector: BNC (unless otherwise 
specified) 

Ion Sensor Specifications: 

Measuring Membrane:  

Selective Fluoride Sensitive 
Membrane (solid state) 

Dimensions: 

 0.310", (7.8 mm) DIA 

Initial 
Impedance:  

Less than 100 M Ohms @ 25

 o 

C 

Interfering Ions in Ratios of Permissible Excess: 
Interfering Ion / Measured Ion (in 
Molarity): 

OH- above 12.0 
pH 

Reference System Specifications: 

Type: Double 
Junction 
Reference Half Cell:   Ag/AgCl, Saturated 
KCl 
Primary Junction:   Porous Ceramic, Saturated KCl in 
crosslinked polymer 
Secondary Junction:   Porous Kynar, Saturated with KCl 
in crosslinked polymer 

Surface Area:  

366,000 mil

2

, (236 mm

2

) 

Storage and Shelf Life: 1 year from date of manufacture at room temperature with protective cap on 

7  Sensor Specifications 

Содержание FX-300-F

Страница 1: ...has been made to ensure the accuracy of this document at the time of printing In accordance with the company s policy of continuous product improvement Foxcroft reserves the right to make product cha...

Страница 2: ...Page Intentionally Left Blank...

Страница 3: ...Alarm Relay Control Module 15 3 5 Wiring schematic adding multiple devices to the 4 20mA output loop 15 3 6 New Sensor Installation Acclimation Time 16 3 61 Submersible Sensor Installation 16 3 72 Ins...

Страница 4: ...RT nF x Log A It s important to note the FX 300 ion selective sensors provide a measurement of free ion activity those ions that are not bound to other ions or molecules and not the actual total ion c...

Страница 5: ...ll not detect the total fluoride content as some of the fluoride ion will be converted into the form of dissolved HF gas To convert the measured fluoride ion activity free fluoride into a total fluori...

Страница 6: ...3 2 1 HF Ionization 2 Introduction...

Страница 7: ...luminates when the Modbus if included is active For viewing or changing setup operating parameters use the Mode key to select SETUP and use the Up and Down keys to scroll through the parameters Select...

Страница 8: ...mA output setpoint and no 11 Par no 10 and sets the ppm value that corresponds to 20mA output setpoint Par no 11 The difference between Par no 10 and 11 must be at least 20 of the working output range...

Страница 9: ...999 10 0 10 0 4mA Set Low ppm setpoint 0 00 999 0 00 11 20mA set High ppm setpoint 0 00 999 10 0 12 Step change mV increment per Up or Down button depression 0 0 02 1 0 05 2 0 10 3 0 20 4 0 50 5 1 0...

Страница 10: ...re one decade lOX apart in value In addition you will need to once again place the ISE sensor back into service and allow it to reach equilibrium You will then also need to repeat your 1 point grab sa...

Страница 11: ...contains 2 measurements ISE mV and temperature Access to these are gained through the function code Read_Input_Registers 04 The FX 300 ISE gives access to different diagnostic values via Diagnostics...

Страница 12: ...e parameter will only be changed when a 2 point slope calibration is performed After calibration the slope should be at or very close to the default value If not this indicates the calibration was not...

Страница 13: ...these modules only The isolation on the AC DC transformer of the FX 300 PS acts to isolate the 24VDC power from any other electrical devices at the installation site ensuring that no potential ground...

Страница 14: ...rsal 100 240 VAC input 24V power supply protected by a 6 amp fuse located in the power entry module Ensure the instrument is properly grounded CAUTION THE 24VDC UNIVERSAL POWER SUPPLY CANNOT BE USED T...

Страница 15: ...to the instrument using the on off switch on the power entry module To access the measurement modules for wiring remove the four screws that retain the instrument enclosure lid Each terminal is label...

Страница 16: ...e bottom diagram FX 300 pH ISE X is for sensors with internal integrated preamplifiers The lead providing 24VDC power always goes to terminal 6 and the 4 20mA current loop output is always sent from t...

Страница 17: ...VE 4 20mA analog current loop output like a 4 wire type device The data acquisition or control device to which this active 4 20mA output is connected should passively measure the current Most PLC s ha...

Страница 18: ...ult Wiring Configuration 4 20mA output terminal to FX 300 REL 3 5 Alternate wiring schematic for adding multiple devices to the 4 20mA transmitter output loop EXTERNAL DEVICE ANALOG INPUTS MUST BE ISO...

Страница 19: ...firm downward shake Thermal equilibrium between the sensor and process solutions at elevated or depressed temperature not at 25 degrees Celsius is generally better achieved via immersion or submersion...

Страница 20: ...the sensor into a stilling well in order to meet the less than 0 5 ft sec flow velocity requirement of the sensor for stable readings and to extend sensor life Sensor cables should be installed in con...

Страница 21: ...or on the sensor tip Sensors should NEVER be mounted with the sensor tip pointing straight down horizontally or pointing up as this may cause a bubble on the sensor tip and lead to erratic or unreliab...

Страница 22: ...19 3 63 Installation FX 300 FP Inline Flow Panel...

Страница 23: ...the rocker switch next to the power cord socket 9 The correct operating parameters are set at the factory to suit your application and can be viewed in Setup mode The only parameters normally changed...

Страница 24: ...20mA or 4 20 mA 2 Make sure display mode P06 on the REL module matches the output variable P07 on the ISE module factory set to ISE 3 Make sure the ISE Output operating range P09 of the ISE module mat...

Страница 25: ...Check that the transmitter setting for the Pt100 or Pt1000 TC type matches the temperature element in the sensor POTENTIAL SIGNAL INPUT RELATED PROBLEMS The input signal value obtained from the connec...

Страница 26: ...grab sample and if performed promptly after making a grab sample determination Calibration solutions should be kept clean and out of direct sunlight and or other high energy radiation sources to maxi...

Страница 27: ...h parameter P15 and the sensor offset resulting from a 2 point calibration with parameter P14 If you perform a 1 point grab sample offset subsequently the offset P14 will change whereas the sensor slo...

Страница 28: ...n effects When this method is used it is typical to add the TISAB II on a one to one volume basis to the unknown and then to determine the fluoride concentration of this diluted sample The actual fluo...

Страница 29: ...he previous section A250 ml glass or plastic beaker that is heavy enough to prevent the sensor from tipping the beaker over Low Fluoride Standard Solution low ppm mixed with TISAB II total ionic stren...

Страница 30: ...ameter including the temperature offset and slope calibrations 5 Press the Mode key to select Offset 6 Adjust the reading using the Up Down keys until the display shows the correct value for the first...

Страница 31: ...lution prepared from this procedure will stay good for 1 year from date of manufacture if stored in a sealed opaque plastic bottle in a cool dry location Always use the more stable TISAB II rather tha...

Страница 32: ...ix solution well until completely homogenous 3 Transfer this 100ppm fluoride calibration solution to a 1L plastic bottle and label appropriately Preparation of 20ppm sodium fluoride standard ion solut...

Страница 33: ...re 1 Thoroughly rinse the sensor tip with distilled or deionized DI water Gently blot the sensor tip dry Be careful not to scratch or damage the sensitive fluoride ion selective membrane Cleaning Proc...

Страница 34: ...o 9 5 pH continuous intermittent up to 11 pH with measuring crystal degradation Temperature Range 5 to 50 o C Temperature Compensation Fast Temp PT1000 for variable temperature conditions Pressure Ran...

Страница 35: ...of 8ea FX 300 transmitter modules in a single enclosure Application FX 300 REL modules are ideal for supervising mA signals This unit is fully compatible with the output provided by all of our FX 300...

Страница 36: ...n Off control with deadband 3 Time Proportional Control TPC or 4 Proportional Frequency Control PFC a k a Variable Pulse Reset During simple supervision i e control mode is Off an alarm may be reset i...

Страница 37: ...the value of the 20mA input When in P06 is there are no adjustments possible When P06 is ISE the value should be adjusted to match P11 on the FX 300 ISE to which is it connected The difference between...

Страница 38: ...ode Type of input measurement pH CON USE 7 ISE range ISE range input Lo Mid Hi Lo 8 Con range Conductivity Cell Constant 0 01 0 1 1 0 2 0 10 0 1 0 9 4mA scale Reading 4mA 10 20mA scale Reading 20mA 11...

Страница 39: ...frequency Inside the proportional band the frequency is changed linearly towards zero as the measurement approaches the setpoint Time Proportional Control TPC The time is constant and equal to the ba...

Страница 40: ...isplay mode ISE 1 999 800 Limit 2 Setpoint for limit 2 5 0 99 9 20 0 Display mode Display mode pH 0 1 14 0pH 2 8 Display mode Con 1 500 100 Display mode ISE 1 999 200 Tr s limit 1 Reaction time limit...

Страница 41: ...the measured value crosses 5 of the measuring range here corresponding to 0 7pH the startup timer is activated to avoid false readings during settling time of the sensor This time should be selected l...

Страница 42: ...d value drops below the setpoint This is illustrated with period 5 Wiring Schematic for FX 300 Measurement Transmitters FX 300 pH FX 300 CON or FX 300 ISE when used together with FX 300 REL Relay Modu...

Страница 43: ...e the following information 1 A clearly written description of the malfunction 2 Name of person to contact and the phone number where they can be reached 3 Proper return address for shipping system ba...

Страница 44: ...yer agrees to hold Foxcroft Equipment Service harmless from all claims for damages arising out of injury or death to any person or damage to any facility or any other property or loss of use of any su...

Страница 45: ...pment and Service Co Inc 2101 Creek Road P O Box 39 Glenmoore PA 19343 Tel 800 874 0590 610 942 2888 Fax 610 942 2769 Email sales foxcroft com Website www foxcroft com Serial Number Label of FX 300 Se...

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