Extech Instruments ExStik PH150-C Manuel utilisateur

User Guide

ExStikTM Concrete pH Kit

Model PH150-C

PH150-C V2.1 07/09

O-Ring

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

(Electrode cap is not shown)

Display

1. Bargraph reading

2. Measurement reading

3. BAT (low battery) indicator

and pH unit of measure

4. Temperature display

5. Bargraph scale designations

6. Calibration indicators

7. RENEW and HOLD indicators

Cable and Probe Guard

1. PH150

2. O-Ring

3. Retaining nut

4. Extension cable

5. Retaining nut

6. Probe guard

7. Probe

8. O-Ring

BAT

RENEW

HOLD

PH150

HOLD

LMH

PH150-C V2.1 07/09

Introduction

Congratulations on your purchase of the ExStik®PH150-C Concrete pH Kit. The PH150-C is

designed for pH and temperature measurements on concrete. The flat surface electrode

provides fast and easy measurements. The 3 ft extension cable and probe guard/weighted

base simplify measurements on flat concrete surfaces. The PH150-C, with careful use and

maintenance, will provide years of reliable service.

Overview

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

•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.

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 O-ring

gasket seals the electrode with the meter).

Cable and Guard Installation Instructions:

1. To remove the electrode, turn the instrument OFF and then unscrew the electrode

retaining nut, and remove it (turn counter-clockwise to remove).

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

disconnects from the meter.

3. Attach the electrode to the cable by aligning the slots and pins, and carefully plugging

the electrode into the cable socket. Be sure the O-Ring is between the probe shoulder

and the threaded end of the cable connecter (see diagram).

4. Tighten the electrode retaining nut firmly to seal the electrode to the cable. Do not

overtighten.

5. Attach the meter to the other end of the cable, using the same procedure as

described in steps (3.) and (4.).

Note: The guard is not designed to be used without the cable. The cable can be used

without the guard if desired.

PH150-C V2.1 07/09

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. 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.

Powering the ExStik™

The ExStik®uses four (4) CR2032 Lithium Ion Batteries (included). If the batteries are

weak, the ‘BAT’ indicator appears on the LCD. Press the ON/OFF key to turn the ExStik®

on or off. The auto power off feature shuts the ExStik®off automatically after 10 minutes of

inactivity to preserve battery life.

pH Calibration (1, 2, or 3 points)

1. Place the electrode into a buffer solution (4, 7, or 10). Press and hold the

CAL/RECALL key until “CAL” appears in the lower (temp.) display. When doing a 2

or 3 point calibration, calibrate with pH 7 buffer first, then follow with pH 4 then the pH

10 buffer.

2. The ExStik®automatically recognizes the solution and calibrates itself to that value

(the circled number on the LCD will match the solution). Note that if the solution is

more than 1 pH unit off from the L (4), M (7), or H (10) pH buffer, or if the electrode

slope is low, the ExStik®will assume an error and abort the calibration (End will be

displayed, and the unit will return to measure mode.)

3. During calibration, the pH reading flashes on the main display.

4. When calibration is complete, the ExStik®automatically displays “SA”, then “End” and

returns to normal operation mode.

5. The appropriate circled indicator (L, M, or H) appears on the LCD when a particular

calibration or series of calibrations has been completed within one power on cycle.

When the ExStik®is turned off, the circled indicator configuration and the calibration

data will be retained.

6. For a two or three point calibration, rinse in distilled water and 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

To change the displayed temperature units (oC or oF):

1. With the unit OFF, press and hold down the CAL/RECALL button.

2. With the CAL/RECALL button depressed momentarily press the ON/OFF button.

When “SELF CAL” appears in the display release the CAL/RECALL button. The unit

will power on with temperature displayed in the new units.

Data Hold

Press the MODE/HOLD button to hold (freeze) a reading in the display. The meter will

enter the HOLD mode and the “HOLD” indicator will appear.

Note: This also stores the reading.

Press the MODE/HOLD button again to return to normal operation.

PH150-C V2.1 07/09

Storing Readings into Memory

1. Press the MODE/HOLD button to store a reading. The storage location number will be

displayed on the lower display, while the main display shows the stored reading. The

meter will enter the HOLD mode and the “HOLD” indicator will appear.

2. Press the MODE/HOLD button again to exit the HOLD mode and return to normal

operation.

3. If more than 25 readings are stored, previously stored readings (starting with number

1) will be overwritten.

Recalling Stored Readings

Note: Check that the HOLD symbol is not displayed. If it is, exit the HOLD function by

momentarily pressing the MODE/HOLD button.

1. Press the CAL/RECALL button and then press the MODE/HOLD button. A location

number (1 through 25) will briefly appear and then the value stored in that location will

appear. The displayed units will flash, indicating that the storage recall mode is active.

2. The last stored reading will be displayed first. Pressing and releasing the MODE/HOLD

button will scroll through the stored readings one at a time. The location number is

displayed first, followed by the reading stored in that location.

3. To exit the storage mode, press the CAL/RECALL button and the meter will return to

normal operation, after displaying “End”.

CAL Reminder Display

When the ExStikTM is turned on in the pH mode for the 15th time without recalibration, the

‘CAL’ icon will flash 3 times, indicating that the ExStikTM may require calibration. Some

applications may require recalibration of the electrode more frequently than others.

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/HOLD button. Simply press

the MODE/HOLD 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 then

reinsert the batteries.

PH150-C V2.1 07/09

Battery Replacement

1. Twist off the battery compartment cap

2. Replace the four (4) 2032 batteries observing polarity.

3. Replace the battery compartment cap

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

Measurement storage 25 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)

Support line (781) 890-7440

Technical support: Extension 200; E-mail: [email protected]

Repair & Returns: Extension 210; E-mail: repair@extech.com

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 (781) 890-7440 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 issued before 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.

more infor for Extech PH150-C

Phone: 01235 838 555

Email: cs@airconcern.co.uk

Web. www.airconcern.co.uk

Air Concern Ltd, Building 173 Curie Avenue Harvell Didcot, Oxfordshire

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