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ExStik
TM
(PH100, PH110, & RE300) Version 2.6 02/04
Page 3
ExStik
TM
Description
1. Battery compartment cap
2. LCD Display
3. MODE button
4. CAL button
5. ON/OFF button
6. Electrode collar
7. Electrode (refillable on PH110)
(Electrode cap is not shown)
ExStik
TM
Display
1. Bargraph reading
2. Measurement reading
3. BAT (low battery) and
HOLD (data hold) indicators
4. Temperature display
5. Bargraph scale designations
6. Units of measure
7. Calibration indicators
8. RENEW and CAL indicators
pH Overview
pH is a unit of measure (ranging from 0 to 14pH) indicating the degree of acidity or alkalinity
of a solution. pH tests are the most commonly performed measurements in water analysis,
using the hydrogen ion activity of a solution to determine acidity or alkalinity. Solutions with
a pH less than 7 are considered acidic, solutions with a pH higher than 7 are known as
bases, and solutions with a pH of exactly 7 are neutral.
The pH scale is logarithmic so, for example, if sample A is 1 pH less than Sample B, this
means that Sample A is 10 times more acidic then Sample B. A difference of 1 pH
represents a ten-fold difference in acidity.
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