EXTECH PH110 User Guide

User Guide

ExStikTM Waterproof pH Meter

Model PH110

ExStikTM Description

Front Panel Controls

1. Battery compartment cap

2. LCD Display

3. MODE / HOLD button

4. CAL / RECALL button

5. ON/OFF button

6. Electrode collar

7. Refillable Electrode

(Electrode cap is not shown)

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

CAUTIONS

• This device is not a toy and must not reach children’s hands. It contains hazardous objects as
well as small parts that the children could swallow. In case a child swallows any of them,
please contact a physician immediately

• Do not leave batteries and packing material lying around unattended; they can be dangerous
for children if they use them as toys

• In case the device is going to be unused for an extended period of time, remove the batteries
to prevent them from training

• Expired or damaged batteries can cause cauterization on contact with the skin. Always,
therefore, use suitable hand gloves in such cases

• See that the batteries are not short-circuited. Do not throw batteries into the fire.

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Overview

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 and reports
the negative log of the hydrogen ion activity of a solution which is an indicator of 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.

Getting Started

• For new meters, remove the battery cap and then remove the battery insulating strip.

• Remove the cap from the bottom of the ExStik

reference junction

• Before first use or after extended storage, soak the electrode (with its cap removed) in a pH 4
solution for about 10 minutes

• White KCL crystals may be present in the cap. These crystals will dissolve in the soak or they can
be simply rinsed with tap water

• Always calibrate close to the expected measurement value

• A sponge is located in the electrode protective cap. Keep this sponge soaked with a pH 4 solution

to preserve Electrode life during storage

Replacing Electrodes

The ExStikTM is shipped with an electrode attached. Electrode life is limited and is dependent on
(among other factors) frequency of use and care. If the electrode needs to be replaced, follow these
steps for removing and connecting electrodes. Note that the PH110 has a refillable electrode.

1. To remove an electrode, unscrew and completely remove the electrode retaining collar.

2. Gently rock the electrode from side to side, pulling it away from the meter, until it disconnects.

3. To attach an electrode, carefully plug the electrode into the meter socket (note that the
electrode connector is keyed, ensuring proper connection).

4. Secure the electrode in place by tightly turning the collar in place. (a rubber gasket seals the
electrode with the meter).

Automatic Electrode Recognition

When the ExStikTM is turned on, it recognizes the type of electrode that is connected and displays
the appropriate unit of measure. Attach electrode before turning the ExStik

TM

to expose the electrode glass surface and

TM

on.

Powering the ExStik™

If the batteries are weak, the ‘BAT’ indicator appears on the LCD. Press the ON/OFF key to turn the

TM

ExStik

on or off. The auto power off feature shuts the ExStikTM off automatically after 10 minutes

of inactivity to preserve battery life.

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