Bluelab Soil pH Pen Manual do Utilizador descarregar pdf (Página 12)

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12.0 Error messages

The following error messages appear for the following reasons.

11.0 Calibration

pH calibration is required before ﬁ rst use to ensure that the ﬁ rst reading is

accurate. Calibration is also required when:

• The check mark/tick has disappeared from the LCD screen

(30 days after last successful calibration)

• The reading is different from what you expected

• Af ter cleaning

• After changing the battery

pH 7.0 and pH 4.0 solutions are required for calibration and should be decantered into

small, clean plastic containers. You may also calibrate using pH 7.0 and pH 10.0 solutions if

your readings will normally be higher than 7.0 pH.

Excluding ﬁ rst use, YOU MUST CLEAN the probe tip

before calibrating.

See section 9.0 Cleaning.

Remove storage cap/dibber.

Refer to section 2.0, step 1.

Rinse probe tip in fresh water and place in pH 7.0 solution.

Wait for reading to stabilize to a constant value.

Press the cal button until CAL is displayed.

Release button. When CAL 7 is displayed, 1 point calibration

is achieved.

Rinse probe in fresh water and place it in either pH 4.0

or pH 10.0 solution (use pH 10.0 solution if you expect to

measure above 7.0 pH).

Wait for reading to stabilize to a constant value.

Press the cal button until CAL 4 or CAL 10 is displayed.

CAL 4 or CAL 10 should be displayed (depending on what

solution you are calibrating in). The check mark/tick is

displayed when a 2 point (or 3) calibration is completed.

NOTE: For a three point calibration repeat steps 2, 3 & 4

using pH 7.0, 4.0 then 10.0 solution.

Temperature

over range

pH calibration

failed

pH over range

Hardware error

pH under range

Temperature

under range

pH 7.0

pH 4.0

pH 10.0

1 2 ... 7 8 9 10 11 12 13 14 15

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