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Hanna Instruments Inc., 584 Park East Drive, Woonsocket, RI 02895  USA

 

www.hannainst.com

Package contents

• 

HI6421P

 

• 

HI764833

 

polarographic

 DO probe

 

• Membrane cap and O-ring (2 pcs.)

 

• Electrolyte solution, 30 mL (1 pc.)

• Electrode arm with base plate and screws (mounting)

 

• 24 VDC power adapter and USB-C to USB-A cable

 

• Probe quality certificate, instrument quality certificate, 

quick reference guide

 

 

HI6421P 

Advanced

 Dissolved Oxygen 

Benchtop Meter

Quick Reference Guide

Dear Customer

, thank you for choosing Hanna Instruments.

Getting started

Identify the base plate (1) – to be attached to the 

L

 or the 

R

 side – 

and mounting screw (2) and proceed as illustrated here. 

R

L

2

1

With the arm holder (3) in position and the pH electrode (4) and 

temperature probe (5) plugged in, connect the power cable (6) and 

plug into the mains. Press the ON/OFF button (7) to start.

Remove the transparent film that protects the capacitive touchscreen 

prior to operating the meter.

H

HII642211  Dissolved Oxygen

DO

Ethernet

Extension

USB-A

USB-C

ON/OFF

Power

24Vdc

5

6

4

3

Operating language & Access to support

• At first power on default operating language is English. Browse 

the language window and select operating language from list 

of supported options.

• To access support, tap 

  and select 

.

On first access the benchtop’s name is used as default user name 
and no password is required.

Device handling & Safety precautions

• Transport the unit with all cables removed

• Do not puncture the capacitive touchscreen

• Do not insert objects into the ports, spaces around keys other 

than the intended cable, USB drive

Hanna

®

 is committed to developing and deploying digital 

solutions with a positive impact on the environment and climate.
Please scan the QR code or follow the link 
to download the user manual.
https://manuals.hannainst.com/HI6421

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