Extech Instruments ExStik PH100 User manual

User Guide
ExStikTM pH Waterproof Meters
Models PH100 & PH110
Patent Pending

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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. Electrode (refillable on PH110)
(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
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2
3
4
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7
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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
•Remove the cap from the bottom of the ExStikTM to expose the electrode glass surface
and 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 (PH100 only)
•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
•Before first use, twist off the battery compartment cap to access the battery. Locate and
remove the plastic battery insulating tab.
•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 and the PH100 does not.
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 ExStikTM on.
Powering the ExStik™
If the batteries are weak, the ‘BAT’ indicator appears on the LCD. Press the ON/OFF key
to turn the ExStikTM 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 ExStikTM automatically recognizes the solution and calibrates itself to that value.
Note: If the solution is more than 1pH off from the 4, 7, or 10pH standard, the
ExStikTM will assume an 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 ExStikTM automatically displays ‘END’ and returns
to normal operation mode.
5. The appropriate circled indicator ➃,➆, or ➉will appear on the LCD when a
calibration has 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
ExStikTM 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 ExStikTM 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 ExStikTM 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 ExStikTM may require calibration. Some
applications may 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.
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
pH Electrode Refilling (pH110/115 refillable electrode only)
The refillable electrode does not need to be detached from the
body of the ExStikTM 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.
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.
Refillable
pH Module
Reference junction
Junction removal tool

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Specifications
Display Multifunction LCD with Bargraph
Operating conditions 32 to 122oF (0 to 50oC) / < 80% RH
Range and Accuracy 0.00 to 14.00 / ± 0.01pH typical
Temp. Compensation Automatic from 32 to 194oF (0 to 90oC)
Temperature Range 23 to 194oF (-5 to 90oC)
Temperature Resolution 0.1oup to 99.9 then 1othereafter
Temperature Accuracy ± 1.8oF / 1oC [from 23 to 122oF (-5 to 50oC)]
± 5.4oF / 3oC [from 122 to 194oF (50 to 90oC)]
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)
•DO600-1C 3ft. extension cable
•DO600-5C 16ft. extension cable
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

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
Support line [phone]
Technical support: Extension 200; E-mail: [email protected]
Repair & Returns: Extension 210; E-mail: [e-mail]
Product specifications subject to change without notice
For the latest version of this User’s Guide, Software updates, and other
Up-to-the-minute product information, visit our website: www.extech.com
Warranty
EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and
workmanship for one year from date of shipment (a six month limited warranty applies on sensors and
cables). If it should become necessary to return the instrument for service during or beyond the warranty
period, contact the Customer Service Department at [phone] ext. 210 for authorization or visit our
website at www.extech.com (click on ‘Contact Extech’ and go to ‘Service Department’ to request an RA
number). A Return Authorization (RA) number must be issuedbefore any product is returned to Extech. The
sender is responsible for shipping charges, freight, insurance and proper packaging to prevent damage in
transit. This warranty does not apply to defects resulting from action of the user such as misuse, improper
wiring, operation outside of specification, improper maintenance or repair, or unauthorized modification.
Extech specifically disclaims any implied warranties or merchantability or fitness for a specific purpose and
will not be liable for any direct, indirect, incidental or consequential damages. Extech's total liability is limited
to repair or replacement of the product. The warranty set forth above is inclusive and no other warranty,
whether written or oral, is expressed or implied.
Copyright ©2005 Extech Instruments Corporation.
All rights reserved including the right of reproduction in whole or in part in any form.