Hanna Instruments HI981400 Bedienungsanleitung PDF herunterladen (Seite 2)

TAKING pH MEASUREMENTS

• Turn the meter on by connecting the 12 Vdc power

adapter to the meter and the mains.

• Connect a pH electrode to the indicator.

• Remove the protective cap from the pH electrode and

immerse the tip (4 cm/1½”) in the sample.

• Allow the reading to stabilize.

ADJUSTING THE SETPOINT

You can select the setpoint value in the 4.6 to 7.5 pH

range. A visual indication (red LED) will alert you when the

measured pH exceeds the set value.

• To access the MEASURE/SET switch and the setpoint

adjustment trimmer, remove the rear panel.

• Move the switch upwards to visualize the setpoint.

• With a small screwdriver

adjust the setpoint trimmer

to display the desired value.

The setpoint is factory set at

5.5 pH.

• Move the switch back downwards to return to the

measurement mode.

• Close the meter while making sure the gasket is in place

before tightening the screws.

• Whenever the pH reading

exceeds setpoint, the alarm

LED blinks to warn the user.

For better accuracy, frequent calibration of the instrument is

recommended. In addition, the instrument must be recali-

brated whenever:

a) The pH electrode is replaced

b) After testing aggressive samples

c) Where higher accuracy is required

d) At least once a month

e) When the electrode has been used for a long time

PREPARATION

Pour small quantities of pH 7.0 (HI 7007) and pH 4.0

(HI 7004) solutions into two clean beakers.

For accurate calibration use two beakers for each buffer

solution, the first one for rinsing the tip of the electrode and

the second one for calibration.

A complete range of Hanna buffer solutions in single-use

sachets is available for a more hygienic calibration.

CALIBRATION PROCEDURE

• Turn the meter on and make sure that the MEASURE/SET

switch is on the MEASURE mode.

• Remove the protective cap from

the electrode, rinse and im-

merse it in pH 7.0 buffer

solution.

• Stir gently and wait a couple

of minutes for the reading to

stabilize.

Note: The electrode should be

submerged approximately

4 cm (1½”) in the solu-

tion.

• With the supplied calibration screwdriver, adjust the

“pH 7” trimmer until the dispaly shows “pH 7.0”.

CALIBRATION

• Rinse and immerse the electrode in pH 4.0 (or pH 10)

solution (second calibration point) and stir gently.

• Wait a couple of minutes, then adjust the “pH 4”

trimmer until the display shows the “pH 4.0” (or “pH

10.0”).

The pH calibration is now complete.

4 cm

(1½")

7.0

FOOD STABILITY

pH INDICATOR

HACCP

pH4

pH7

Recommendations for Users

Before using this product, make sure that it is entirely suitable for the

environment in which it is used. Operation of this instrument in residential

areas could cause unacceptable interference to radio and TV equipment.

The glass bulb at the end of the electrode is sensitive to electrostatic discharge.

Avoid touching this glass bulb at all times. During operation, ESD wrist straps

should be worn to avoid possible damage to the electrode by electrostatic

discharge.

Any variation introduced by the user to the supplied equipment may degrade

the instrument’s EMC performance.

To avoid electrical shock, do not use this instrument when voltage at the

measurement surface exceeds 24 Vac or 60 Vdc.

To avoid damage or burns, do not perform any measurement in microwave

ovens.

ACCESSORIES

FC 200B Conic, open junction pH electrode

FC 230B pH electrode with optional blade

FC 098 Stainless steel blade, 20 mm (0.8”)

FC 099 Stainless steel blade, 35 mm (1.4”)

HI 70004P pH 4.01 solution, 20 mL sachet (25 pcs)

HI 70007P pH 7.01 solution, 20 mL sachet (25 pcs)

HI 70010P pH 10.01 solution, 20 mL sachet (25 pcs)

HI 7004M pH 4.01 solution, 230 mL bottle

HI 7007M pH 7.01 solution, 230 mL bottle

HI 70300M Electrode storage solution, 230 mL bottle

HI 7061M Electrode cleaning solution, 230 mL bottle

HI 710005 12 Vdc power adapter, US plug

HI 710006 12 Vdc power adapter, European plug

SET

MEAS

5.8

FOOD STABILITY

pH INDICATOR

HACCP

pH4

pH7

www.hannainst.com

IST981400R3 05/05

SET

MEAS

HI 7007

RINSE

HI 7007

CALIBRATION

1 2

Kommentare zu diesen Handbüchern

Keine Kommentare

Hanna Instruments HI981400 Bedienungsanleitung Seite 2

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Messen, Testen & Steuern Hanna Instruments HI981400