User Guide ExStik® FL700 Fluoride Meter
Introduction The model FL700 is a system specifically designed for the quick and accurate measurement of fluoride ions in drinking water and other aqueous samples. Unlike other electrode based systems the FL700 consists of the sensing electrode, measuring electronics, and the display in one convenient package. This meter is shipped fully tested; with proper use, this instrument will provide years of reliable service.
Description Meter Description 1. Battery compartment cover 2. LCD Display 3. MODE/HOLD button 4. CAL/RECALL button 5. ON/OFF button 6. Electrode Retaining Collar (ring) 7. Electrode Sensor (Note: The Electrode storage cap is not shown this diagram) Electrode Sensor Description The sensing electrode is a europium doped lanthanum fluoride single crystal that has been incorporated into a removable sensing module that houses a reference electrode and temperature measurement system.
Quick Start The following procedure describes a quick-start for the FL700 using the standard TISAB chemistry. Detailed operating instructions can be found on the pages that follow. Preparation 1. Remove the FL700, electrode module and sample cup from its box. Remove caps from module. 2. Fit the electrode module onto the end of the meter body, making sure that the slots line up correctly, and tightly turn the module retaining ring to secure the assembly. 3.
Operation Preparation for use 1. Remove the FL700, electrode module and sample cup from its box. Remove caps from module 2. Fit the electrode module onto the end of the meter body, making sure that the slots line up correctly, and tightly turn the module retaining ring to secure the assembly 3. Wipe the fluoride crystal and reference junction with a damp tissue (cleaning techniques are addressed later in this guide) Powering the FL700 The FL700 uses four (4) CR2032 lithium ion batteries.
Slope Adjustment 1. Slope adjustment although not a frequent requirement can be carried out by following the instructions in Calibration steps above except for the fact that a 10 ppm standard is used after calibrating with the 1 ppm standard 2. Press the Cal button until 10 ppm appears. Slope adjustment is then complete Other standards As mentioned the FL700 can also be calibrated between 0.5 and 5.0 ppm F. Follow the calibration instructions above but substitute 0.5 ppm for 1.0 ppm and 5.0 ppm for 10 ppm.
Storing Readings Up to 25 readings can be stored in memory for later recall. 1. With the meter in the HOLD mode, press and hold the MODE/HOLD button for three (3) seconds to store a reading. Release the button when the memory location number appears on the lower display. 2. After approx. 30 seconds (measurement duration) the meter will return to the HOLD mode and another reading can then be stored. 3.
Maintenance Battery Replacement 1. Twist off the battery compartment cover 2. Holding the battery housing in place with a finger, pull out the battery carrier using the two small tabs 3. Replace the four (4) CR2032 batteries observing proper polarity 4. Replace the battery carrier, reattach the battery compartment cap and tighten securely Electrode Replacement 1. To remove the electrode, first turn the instrument OFF and then unscrew and remove the electrode retaining collar.
Specifications Range 0.10 to 9.99ppm (mg/l) Accuracy ± 3% of reading or ± 0.1ppm (whichever is greater) Resolution 0.1ppm Display 2000 count, Dual function 3 ½ digit LCD with Bargraph, Display size: 24 mm x 20 mm Electrode Europium doped lanthanum fluoride single crystal Electrode life 6 months minimum Response Time 90% of change in less than 30 seconds (typical) Operating Temp.
Warranty EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment (a six month limited warranty applies to sensors and cables). If it should become necessary to return the instrument for service during or beyond the warranty period, contact the Customer Service Department at (781) 890-7440 ext. 210 for authorization or visit our website www.extech.com for contact information.
