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It is recommended to calibrate the instrument frequently, especially if

high accuracy is required.

The instrument should be recalibrated for pH:

a) Whenever the pH electrode or temperature probe is replaced.

b) At least once a month.

c) After testing aggressive chemicals.

d) Whenever the batteries have been replaced.

e) If greater accuracy is required.

PREPARATION

Pour small quantities of pH 7.01 and pH 4.01 solution into two clean

beakers.

For accurate calibration use two beakers for each buffer solution, the

first one for rinsing the electrode and the second one for calibration.

This way contamination of buffer is minimized.

To obtain accurate readings, use pH 7.01 and pH 4.01 buffers if you

are going to measure acidic samples, or pH 7.01 and pH 10.01 for

alkaline measurements.

PROCEDURE FOR HI 9023C AND HI 9023CN:

• Make sure that the meter is in the pH mode.

• Remove the protective cap from the elec-

trode, rinse it with some pH 7.01 solution,

then immerse the pH electrode and tem-

perature probe (

HI 9023CHI 9023C

HI 9023C) or the pH/°C

electrode (

HI 9023CNHI 9023CN

HI 9023CN) into pH 7.01 buffer

solution and stir gently and wait for the

reading to stabilize.

HI 7004 HI 7007

HI 7004

HI 7007

CALIBRATION

HI 7007

RINSE

H CALIBRATIONH CALIBRATION

H CALIBRATION

HI 7007

TROUBLESHOOTING GUIDETROUBLESHOOTING GUIDE

TROUBLESHOOTING GUIDE

The meter is slow in re-

sponding or gives faulty

readings

The meter does not ac-

cept the 2

buffer

solution for calibration

The reading drifts

Display shows: "E1" or

Display shows: "E2" or

Display shows: "E3" or

Display shows: "E4" or

"WRONG

and/or

"WRONG

Display shows: "E5" or

"WRONG

and/or

"WRONG

The meter does not work

with the temperature

probe

The meter fails to cali-

brate or gives faulty

readings

Display acts erratically

The electrode is not work-

ing or the reference

junction is clogged

Out of order pH electrode

Out of order electrode

Out of range pH scale

Out of range tempera-

ture scale

Out of range mV scale

Erroneous buffer solution

used for offset calibra-

tion

Out of order electrode

Erroneous buffer solution

used for slope calibration

Out of order electrode

Out of order temperature

probe

Out of order pH electrode

The microprocessor has

been electronically dis-

turbed

Leave the electrode in a stor-

age solution after cleaning

the junction. If problem per-

sists, replace the electrode

Follow the cleaning proce-

dure. If this doesn't work

replace the electrode

Replace the pH electrode

a) Recalibrate

b) Make sure the pH sample

is in the 0 to 14 range

c) Check the electrolyte level

and the general state of

the pH electrode

Make sure the temperature

is in the 0 to 100°C (or 70°C)

range and the probe is

plugged in

Electrode not connected

Make sure the buffer setting

is correct and the solution is

fresh. Replace the buffer if

necessary

Replace the pH electrode

Make sure the buffer setting

is correct and the solution is

fresh. Replace the buffer if

necessary

Replace the pH electrode

Replace the probe

Replace the electrode

Remove one of the batteries

for one minute to reset the

microprocessor

Symptoms Problem Solution

Brand	Hanna Instruments
Model	HI 9023C
Category	Measuring Instruments
Language	English

Hanna Instruments HI 9023C User Manual

Table of Contents

Questions and Answers:

Hanna Instruments HI 9023C Specifications

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