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INSTRUCTION MANUAL

HI98304

EC Tester

Warranty

These meters are warranted for a period of one year against defects in 
workmanship and materials when used for their intended purpose and 
maintained according to instructions. Probes are warranted for a period 
of six months. This warranty is limited to repair or replacement free of 
charge. Damage due to accidents, misuse, tampering or lack of prescribed 
maintenance is not covered. If service is required, contact your local Hanna 
Instruments Office. If under warranty, report the model number, date of 
purchase, serial number and the nature of the problem. If the repair is not 
covered by the warranty, you will be notified of the charges incurred. If the 
instrument is to be returned to Hanna Instruments, first obtain a Returned 
Goods Authorization (RGA) number from the Technical Service department 
and then send it with shipping costs prepaid. When shipping any instrument, 
make sure it is properly packaged for complete protection.

Solutions

Code

Description

HI70030P

12.88 mS/cm calibration solution, 
20 mL sachets (25 pcs.)

HI7030M

12.88 mS/cm calibration solution, 
230 mL bottle 

HI7030L

12.88 mS/cm calibration solution, 
500 mL bottle

Accessories

 

 

IST98304N  06/18

To obtain the highest accuracy for measurement it is important to follow 
these tips:

•  Calibration is only as good as the solution being used. The calibration 

solution values change over time. Fresh solution should be used for each 
calibration.

•  The probe should be rinsed with purified water each time before placing 

in calibration solution or sample to be tested.

Care and Maintenance

Error messages

During user calibration, if the reading is out of the accepted range, the meter 
will display “---- Err“.i.e. 20.00 mS/cm blinking means the limit of the 
measured value is out of range.
If the measured temperature is higher than 50.0 ºC or lower than 0.0 ºC, the 
50.0 ºC or 0.0 ºC temperature value will blink on the LCD in measure mode.

1. Pour 2” (5 cm) of standard solution into a container.
2. Place the probe in calibration solution. The probe tip should be centered 

in the solution and submersed 1.18” (3 cm). The meter will automatically 
recognize the solution.

3. If the solution is not recognized or is out of the accepted range “

---- 

Err“ 

is displayed.

4. If the calibration solution is recognized “REC“ is displayed until the 

reading is stable and the calibration is accepted.

• After acceptance, the “Stor“ message is displayed and meter returns to 

measurement mode.

Calibration Procedure

Measurement and Calibration

For better accuracy, frequent calibration of the meter is recommended. In 
addition, the instrument must be recalibrated:

• When high accuracy is required.
• At least once a month.

Measurement

Press the ON/OFF button to turn the meter ON. Place the probe to the 
desired solution. The conductivity value, automatically compensated for 
temperature, will be shown on the LCD.
The measured temperature will be shown on the secondary LCD.

Note: Before taking any measurement make sure the meter has been 

calibrated.

Clear Calibration

Place meter in calibration mode. Press ON/OFF and “Clr” is displayed. The 
meter will now be at default calibration. 

DiST 4

Battery Replacement

To change the CR2032 Li-ion battery, turn the battery cover located on the 
back of the meter counterclockwise to unlock. Remove cover and replace with 
new b side facing up.

Note: Batteries should only be replaced in a safe area using the 

battery type specified in this instruction manual. Old batteries should 

be disposed in accordance with local regulations.

The meter features a low battery indicator. When the battery is running low 
(under 10%), the battery indicator will blink on the LCD. When the battery 
is discharged  

“dEAd bAtt”

 will be displayed on the LCD for 2 seconds and 

the meter will turn off.

0

0

4

4

Recommendations for Users

Before using Hanna Instruments products, make sure that they are entirely 
suitable for your specific application and for the environment in which they 
are used. Any variation introduced by the user to the supplied equipment 
may degrade the meter' s performance. Avoid touching the electrode area. 
To avoid damages or burns, do not put the meter in microwave oven. For 
yours and the meter's safety do not use or store the meter in hazardous 
environments.

• Press CAL button to enter calibration mode from measurement mode. 
• The meter will enter the calibration mode, displaying “mS/cm 12.88 

USE” with CAL tag blinking.

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