Xylem FL700 FLUORIDE METERS - Manual (Page 3)

FL700 V1.1 11/07 3
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. The
high resistance electrode signals are impedance converted to a low resistance output in the
sensing module to ensure stable and noise free performance.
Reagent Tablets
The FL700 allows the users to follow the ASTM and EPA standard methodology using any
of the TISAB reagents and standards already in use. Also, Extech has developed tablet-form
TISAB which contains all of the essential and approved chemicals that are found in the
usual TISAB reagents.
The “dry” reagent does not contribute to sample dilution. The benefits of this method are:
1. No volumetric errors
2. Independent of sample size (± 20% of nominal sample volume)
3. Easy to use in the field or laboratory
4. Can be shipped more easily than liquid reagents
5. Lower cost per test
LCD Display
1. Bargraph display
2. Measurement units
3. Main display
4. Low (L) and High (H) Calibration icons
5. Data HOLD indicator
6. Low Battery indicator
7. Temperature display
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