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Calibration – LaMotte pH Waterproof Testr 1 Meter User Manual

Page 3

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Calibration

Calibration should be done regularly, typically every day that the Testr is used.

3

W

ATERPROOF

pH

T

est

r

1

ON OFF

CAL

HOL

D

CON

1.

2.

3.

4.

5.

Turn the Testr on

by pressing the

ON/OFF button.

buffer if testing

alkaline (or basic)

solutions. If testing

solutions close to

7.0, use the 7.0

buffer for

calibration.

1/2"

to 1"

Press the CAL button

to enter the Calibrate

(CA) mode.

The display will

flash "CA" and

then a pH value

close to the buffer

value will flash

repeatedly.

After about 30 seconds,

press the HOLD/CON

button to confirm the

calibration.

"CON" will

appear on the

display. It will

then switch back

to a pH reading of

the buffer.

Rinse the

electrode with

deionized water

or tap water.

ON OFF

CAL

HOL

D

CON

W

ATERPROOF

pH

T

est

r

1

W

ATERPROOF

pH

T

est

r

1

ON OFF

CAL

HOL

D

CON

W

ATERPROOF

pH

T

est

r

1

ON OFF

CAL

HOL

D

CON

30

W

ATERPROOF

pH

T

est

r

1

ON OFF

CAL

HOL

D

CON

Dip 1/2" to 1" of the

electrode into a pH 7.0

buffer for general purpose

use, into a pH 4.0 buffer

solution if testing acidic

solutions, or a pH 10.0

No further calibration is needed if

all measurements are expected to

be between pH 6 and pH 8 for

general purpose use. Perform the

calibration using pH 4.0 buffer if

readings below pH 6 are expected.

Perform the calibration using pH

10.0 buffer if readings above pH 8

are expected.