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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Operation
Overview
When the electrode is placed in a solution, the main display and bargraph indicate the pH reading
while the lower display reads temperature (readings flash until they have stabilized). The bargraph
is ‘center zero’, i.e. at pH 7 there is no display. As the pH rises, the bar moves from the center to the
right. If the pH drops, the bar moves from the center to the left.
pH Calibration (1, 2, or 3 points)
A two point calibration with a buffer of 7 plus 4 or 10 (whichever is nearest to the expected sample
value) is always recommended. A one point calibration (choose the value closest to the expected
sample value) is also valid. For best accuracy, always calibrate at the sample temperature.
1. Place the electrode into a buffer solution (4, 7, or 10) and momentarily press the CAL key. pH
7 should be calibrated first, then 4 and/or 10 pH.
2. The ExStik
the solution is more than 1pH off from the 4, 7, or 10pH standard, the ExStik
error and abort the calibration. CAL and END will be displayed.
3. During calibration, the pH reading flashes on the main display.
4. When calibration is complete, the ExStik
operation mode.
5. The appropriate circled indicator
been completed. The calibration data is stored until a new calibration is performed.
6. For a two or three point calibration, repeat steps 1-4.
Note: Always turn the meter off and then on before calibrating to allow sufficient time to complete
the calibrations during one power cycle. If the meter auto powers off during calibration the
calibrations remain valid, but new calibrations will turn the circled indicators off.
Changing the Displayed Temperature Units
Press and hold the CAL button for approx. 3 seconds. The oC or oF icon will change first and the
numerical temperature value will change after the button is released. If the Calibration mode is
accidentally accessed ‘CAL’ appears on the LCD. Simply turn the ExStik
TM
automatically recognizes the solution and calibrates itself to that value. Note: If
TM
automatically displays ‘END’ and returns to normal
TM
will assume an
➃ ,➆ , or ➉ will appear on the LCD when a calibration has
TM
off and start again.
Data Hold
Momentarily press the MODE button to freeze the current reading. The HOLD display icon will
appear along with the held reading. The held reading will also be stored in memory. Momentarily
press the MODE key to return to normal operation.
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15-Storing Readings into Memory
1. Momentarily press the MODE button to store a reading.
The LCD will briefly display the memory location
number and then the value stored (Data Hold will
activate).
2. Momentarily press MODE again to return to normal
operation.
3. Repeat step 1 to store the next reading and so on.
4. After 15 readings are stored the ExStik
TM
will return to memory location 1 and start overwriting
existing data with newly stored data.
Recalling Stored Readings
Note: Check that the HOLD symbol is not displayed. If it is, exit the HOLD function by momentarily
pressing the MODE button.
1. Momentarily press the CAL button and then press the MODE button immediately
after CAL is
displayed; the storage location number (1 through 15) will flash. If the CAL mode is
accidentally accessed (display flashing), press the CAL button again to exit.
2. The last reading stored will be displayed first. To advance through the stored readings,
momentarily press the MODE button. The location number is displayed first, followed by the
reading stored in that location.
3. To exit the recall mode, momentarily press the CAL button and the ExStik
TM
will return to
normal operation.
CAL Reminder Display
When the ExStikTM is turned on in the pH mode for the 15th time without recalibration, the ‘CAL’ icon
appears on the LCD indicating that the ExStik
require recalibration of the electrode more frequently than others. The CAL display is simply a
reminder and will turn off when the pH electrode is recalibrated.
TM
may require calibration. Some applications may
RENEW Display
A flashing ‘RENEW’ warning indicates that the probe may be nearing the end of its useful life. If
cleaning or recalibration does not cause the RENEW icon to disappear, replace the electrode. The
RENEW display appears when the output of the pH electrode fails a diagnostic test.
Considerations
• If the unit appears to be locked (display frozen) it is possible that the Data Hold mode has been
inadvertently accessed by pressing the MODE button. Simply press the MODE button again or
turn the meter off and restart if the display appears frozen.
• If the meter does latch up and no button presses revive it, remove the batteries, push the ON
button for 3 seconds and then reinsert the batteries.
• Note that if the batteries are removed, any stored readings will be discarded. Also, the user
calibration data for pH will be cleared. New user pH calibration data is required. Factory
calibration data for all models will be retained, however.
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Battery Replacement
1. Twist off the battery compartment cap
2. Replace the four (4) 2032 batteries observing polarity.
3. Replace the battery compartment cap
You, as the end user, are legally bound (EU Battery ordinance) to return all used
batteries, disposal in the household garbage is prohibited! You can hand over your
used batteries / accumulators at collection points in your community or wherever batteries
/ accumulators are sold!
Disposal: Follow the valid legal stipulations in respect of the disposal of the device at the
end of its lifecycle
pH Electrode Refilling (pH110/115 refillable electrode only)
The refillable electrode does not need to be detached from the body of the
TM
ExStik
in order to perform the refilling procedure. Refillable electrodes
(PH115) have a removable reference junction (slotted) and the word
REFILLABLE on the side of the electrode housing.
Removing the Reference Junction
The removal tool supplied with the PH113
Refill Kit is used to remove the reference
junction from the sensing surface of the
electrode. If the reference junction does not
have slots for the ‘teeth’ of the removal tool to
lock onto, the electrode is NOT refillable.
Holding the electrode upside down, unscrew
and remove the reference junction using the
removal tool.
Junction removal tool
Reference junction
Refillable
pH Module
Filling the Electrode
1. Once the reference junction is removed, fill the cavity with the refill solution supplied in
the Refill Kit.
2. Replace the reference junction using the removal/installation tool. (Spare junctions are
provided if needed).
Filling Solution
The supplied container includes 15ml of filling solution. There is enough solution for 4 to 5 refills.
Use only the supplied solution for refilling the electrode.
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Specifications
Display Multifunction LCD with Bargraph
o
Operating conditions 0 to 50
C (32 to 122oF) / < 80% RH
Range and Accuracy 0.00 to 14.00 / ± 0.01pH typical
Temp. Compensation Automatic from 0 to 90
Temperature Range -5 to 90
Temperature Resolution 0.1
Temperature Accuracy ± 1
± 3
o
C (23 to 194oF)
o
up to 99.9 then 1o thereafter
o
C/1.8oF [from -5 to 50oC (23 to 122oF)]
o
C/5.4oF [from50 to 90oC (122 to 194oF)]
o
C (32 to 194oF
Measurement storage 15 tagged (numbered) readings
Power Four (4) CR2032 button batteries
Low battery indication ‘BAT’ appears on the LCD
Auto power off After 10 minutes of inactivity
Dimensions 35.6x172.7x40.6mm (1.4x6.8x1.6”);110g (3.85oz)
Optional Accessories
• Tripak buffers with 4, 7 & 10 pH capsules (6 each) plus two rinsing solutions (Part Number:
PH103)
• pH 4.01 buffer, pint, (Part Number PH4-P)
• pH 7.00 buffer, pint, (Part Number PH7-P)
• pH 10.00 buffer, pint, (Part Number PH10-P)
• Spare pH Electrode – non-refillable (Part Number: PH105)
• Spare pH Electrode - refillable (Part number PH115)
• Electrode Refill solution (Part number PH113)
• Spare ORP electrode (Part Number: RE305)
• Spare Chlorine electrode (Part Number: CL205)
• Weighted base with 5 solution cups (Part Number: EX006)
Note: If the unit is to be converted for ORP or Chlorine use by attaching the proper electrode,
please visit www.extech.com to download the proper User Guide
Copyright © 2011 Extech Instruments Corporation (a FLIR company)
All rights reserved including the right of reproduction in whole or in part in any form.
www.extech.com
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