EUTECH INSTRUMENTS WATERPROOF PHTESTR 1 PH TESTER User manual

Instruction Sheet

Microprocessor based,

pH Tester 1

that floats!

Microprocessor based,

pH Tester 1

that floats!

Waterproof pHTestr 1

Microprocessor-based Pocket pH Tester

68X247716 2/05 Rev 4

MAINTENANCE IS EASY: Rinse the

electrode in tap water after use. In harsh

samples, take readings quickly, rinse electrode

immediately afterwards with tap water to

remove residues and prevent electrode

contamination. To maximize electrode life, place

a small piece of clean cloth or sponge in the

cap, moisten with tap water (NOT DE-IONIZED

WATER), and replace cap.

CHANGING BATTERIES: Twist open the

battery compartment lid. Remove old

batteries and replace with fresh ones noting

polarity as shown in battery compartment.

Re-calibrate after battery change.

USEFUL NOTE: • To avoid cross contami-

nation, rinse between samples and buffer

with tap water • Calibration should be done

regularly or daily to ensure good tester

accuracy.

ERROR MESSAGES: E1 - Weak batteries.

Need replacement. E2 - Wrong or bad buffer

value (out of range) or the electrode is failing.

OR - Over range signal or electrode is not in

contact with sample solution.

BEFORE USE: DO NOT BE ALARMED if

white crystals form around the cap. This

is normal.

CONDITIONING: Condition the unit before

first use. Remove cap, immerse electrode

in tap water for 1 hour. This activates

electrode and dissolves crystals.

CALIBRATION: Select pH 7 buffer for

general testing or pH 4 or 10 buffer

if you are measuring acidic/basic

samples. Press ON/OFF button to power

on. Immerse electrode in chosen

buffer about 2 cm deep and stir gently.

Wait for displayed value to stabilize

at or near the pH buffer chosen.

Next, press the CAL button to enter

calibration sequence. When dis-

play flashes continuously, press

HOLD/CON button to confirm.

You have successfully calibrated

the instrument.

pH TESTING: • Remove cap

and press ON/OFF button on

the keypad to turn on the

pHTestr 1 • Dip the electrode

about 2 cm into the test solution

• Stir once, let the display

stabilize. Note the pH • Press

HOLD/CON button if you wish

to hold the reading. Press again

to release • Press the ON/OFF

button to shut off • Tester au-

tomatically shuts-off after 8.5

minutes to conserve batteries!

Keypad

Eutech Instruments

Oakton Instruments

www.eutechinst.com

www.4oakton.com

Lanyard

Connection

Replaceable

Sensor

SPECIFICATIONS

Model pHTestr 1, 2

pH Range -1.0 to 15.0 pH

Resolution 0.1 pH

Accuracy pHTestr 1 : ± 0.2 pH

pHTestr 2 : ± 0.1 pH

ATC Yes (Except pHTestr 1)

Calibration pHTestr 1 :

1-point (4.0, 7.0 or 10.0)

pHTestr 2 :

3-point (4.0, 7.0 & 10.0)

Auto Power- Yes

Off/Hold

Auto-Buffer Yes (pH 4, 7, & 10)

Recognition

Battery Life 3 x 1.4V (Type: A 76,

LR44, V13GA) ; >60 hours

Dimension/ Tester : 15 x 3.8 cm ; 90g

Weight Boxed : 18.5 x 7 x 5 cm ; 170g

Made in Malaysia

Twist-off

Battery

Compartment

Amplified

Electrode

68X247809 2/05 Rev 3

ELECTRODE REPLACEMENT: One of the

benefits in selecting the Waterproof pH

tester is that you can now replace the

electrode whenever needed keeping the

body of the tester intact. When the tester

fails to calibrate, gives fluctuating readings

in buffers, or shows error messages ‘E2’

or ‘OR’ in a buffer, and the procedures in

the maintenance section do not help,

you need to change the electrode (see

pictures for instructions).• With dry hands

firmly grip the ribbed collar (Picture A)

and slowly twist the body counter

clockwise until it is completely removed.

Save both the electrode module collar

and O-ring inside for later use. Pull the

old electrode module straight out from

the bottom of the tester • Align the four

tabs on the new module so they match

the four slots on the tester (Picture B).

Note: Older testers may have only two

slots. In this case, break off the two small

tabs using a needle-nose pliers • Gently

push the module onto the bottom end to

fully seat it in position. Put the small O-

ring all the way into the ribbed collar.

Then push the collar on over the module

and hand-tighten by firmly twisting it

clockwise.

Rotate collar away from you

Rubber

Gripper

Band

Ribbed Collar

Small O-Ring

(Hidden) Large O-Ring

Replacement

Electrode

Insert Electrode Small Tabs

REMOVE THE OLD ELECTRODE

REPLACE THE ELECTRODE

Large Tab

(Picture B)

(Picture A)

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