Meter Description; Electrode Sensor Description - Extech Instruments ExStik FL700 User Manual

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. A total ionic strength adjustment buffer (TISAB) is a buffer solution which increases
the ionic strength of a solution to a relatively high level.
The "dry" TISAB 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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FL700-en-US_V1.4 09/14
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