User Guide

ManualsBrandsHanna Instruments ManualsOtherHI 98321

For better accuracy, frequent calibration of the instru-

ment is recommended. In addition, the instrument

must be recalibrated whenever:

a) After testing aggressive chemicals.

b) Where high accuracy is required.

c) At least once a month.

To change the EC/TDS conversion factor (CONV)To change the EC/TDS conversion factor (CONV)

To change the EC/TDS conversion factor (CONV)

and the temperature compensation coefficient and the temperature compensation coefficient

and the temperature compensation coefficient

ββ

(BETA)(BETA)

(BETA)

• From measurement mode, press and hold the

MODE button until

TEMP and the current tempera-

ture unit are displayed on the lower LCD. Eg.

TEMP

°C.

• Press the MODE button again to show the current

conversion factor. Eg.

0.50 CONV.

• Press the SET/HOLD button to change the conver-

sion factor.

• Press the MODE button to show the current tem-

perature compensation coefficient

β. Eg. 2.1 BETA.

• Press the SET/HOLD button to change the tempera-

ture compensation coefficient β.

• Press the MODE button to return to normal mea-

surement mode.

Calibration procedureCalibration procedure

Calibration procedure

• From measurement mode, press and hold the

MODE button until

CAL is displayed on the lower

LCD.

• Release the button and fill the cell cup with the

proper calibration solution: HI7031 (1413 µS/cm) for

HI 98321 and HI7030 (12.88 mS/cm) for HI 98322.

• Once the calibration has been automatically per-

formed, the LCD will display

OK for 1 second and the

meter will return to normal measurement mode.

• Since there is a known relationship between EC and

TDS readings, it is not necessary to calibrate the meter

in TDS. If the EC/TDS conversion factor is either 0.5

or 0.7, the meter will allow a direct calibration in

ppm by using the Hanna calibration solutions listed

below.

The

CAL tag on the LCD means that the meter is

calibrated.

To reset to the default calibrationTo reset to the default calibration

To reset to the default calibration

To clear a previous calibration, press the MODE

button after entering the calibration mode. The lower

LCD will display

ESC for 1 second and the meter will

return to normal measurement mode. The

CAL symbol

on the LCD will disappear. The meter will be reset to

the default calibration.

CALIBRATIONCALIBRATION

CALIBRATION

BATTERY REPLACEMENTBATTERY REPLACEMENT

BATTERY REPLACEMENT

The meter displays the remaining battery percentage

every time it is switched on. When the battery level is

below 5%, the

- +

symbol on the bottom left of the LCD

lights up to indicate a low battery condition. The batter-

ies must be immediately replaced. If however the battery

level is so low as to cause erroneous reading, the Battery

Error Prevention System (BEPS) will automatically turn

the meter off.

To change the batteries, remove the 4 screws located on

the bottom of the meter.

Remove the screw and the washer in the battery com-

partment and carefully replace the 4 batteries located in

the compartment while paying attention to their polarity.

Replace the washer and tighten the screw in the com-

partment; replace the bottom, making sure that the

gasket is properly seated in place, and tighten the screws.

Note: Batteries should only be replaced in a nonhaz-

ardous area using the battery type specified in this in-

struction manual.

ToTo

turnturn

turn

thethe

the

metermeter

meter

onon

andand

and

toto

checkcheck

check

batterybattery

battery

statusstatus

status

Press and hold the

MODE button for 2-3 seconds. All

the used segments on the LCD will be visible for a few

seconds, followed by a percent indication of the

remaining battery life. Eg.

% 100 BATT.

Taking measurementsTaking measurements

Taking measurements

Rinse and fill the cell cup

with the solution to be tested.

Select either EC or TDS

mode with the SET/HOLD

button.

The measurements should be

taken when the stability sym-

bol ¹ on the top left of the

LCD disappears.

The EC (or TDS) value auto-

matically compensated for

temperature is shown on the

primary LCD while the second-

ary LCD shows the temperature

of the sample.

ToTo

change the temperature unitchange the temperature unit

change the temperature unit

To change the temperature unit (from °C to °F), from

measurement mode press and hold the MODE button

until

TEMP and the current temperature unit are

displayed on the lower LCD. Eg.

TEMP °C.

Use the SET/HOLD button to change the temperature

unit, and then press MODE button twice to return to

normal measurement mode.

ToTo

freezefreeze

freeze

thethe

the

displaydisplay

display

Press the SET/HOLD button for 2-3 seconds until

HOLD appears on the secondary display.

Press either button to return to normal mode.

ToTo

turnturn

turn

thethe

the

metermeter

meter

offoff

off

Press the

MODE button while in normal measurement

mode.

OFF will appear on the lower part of the

display. Release the button.

NotesNotes

Notes:

• Before taking any measurement make sure the

meter has been calibrated.

• If measurements are taken in different samples

successively, rinse the cell cup thoroughly to eliminate

cross-contamination; and after cleaning, rinse it with

some of the sample to be measured.

OPERATIONAL GUIDEOPERATIONAL GUIDE

OPERATIONAL GUIDE

ACCESSORIESACCESSORIES

ACCESSORIES

HI 70030P 12.88 mS/cm @25ºC calibration solu-

tion, 20 mL sachet (25 pcs)

HI 70031P 1413 µS/cm @25ºC calibration solu-

tion, 20 mL sachet (25 pcs)

HI 70032P 1382 ppm @25ºC calibration solution,

20 mL sachet (25 pcs)

HI 70038P 6.44 ppt @25ºC calibration solution, 20

mL sachet (25 pcs)

HI 70442P 1500 ppm @25ºC calibration solution,

20 mL sachet (25 pcs)

CE DECLARATIONCE DECLARATION

CE DECLARATION

OF CONFORMITYOF CONFORMITY

OF CONFORMITY