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testo 400 - Universal IAQ instrument
Short instructions

Contents
About this document ........................................................................... 5
Safety and disposal .............................................................................. 5
Product-specific safety instructions .................................................. 5
Data protection ..................................................................................... 6
Use ......................................................................................................... 6
Product description ............................................................................. 7
Front view ........................................................................................................... 7
Rear view ........................................................................................................... 8
Probe connections .............................................................................................. 9
Commissioning .................................................................................... 9
Power supply / Battery ........................................................................................ 9
Turning the testo 400 on and off ....................................................................... 10
Display – user interface .................................................................................... 11
Using the product ............................................................................... 12
Overview of main menu ( )............................................................................ 12
Overview of measurement types ( ) ............................................................... 14
Overview – editing the reading display ( ) .................................................... 14
Getting the readings in 5 steps ......................................................................... 15
Software .............................................................................................. 17
Purpose ............................................................................................................ 17
System requirements ........................................................................................ 17
First steps ......................................................................................................... 18
Installing the software/driver ..................................................................................... 18
Launching testo DataControl .................................................................................... 18
Using the product ............................................................................................. 19
Overview .................................................................................................................. 19
Synchronizing data................................................................................................... 20
Technical data .................................................................................... 20
Product-specific approvals ................................................................................ 21
Contact and support ......................................................................................... 21
Contents

About this document
DANGER
Integrated magnet
Danger to life for persons with pacemakers!
- Keep a distance of at least 8” between your pacemaker and the
measuring instrument.
ATTENTION
Integrated magnet
Damage to other devices!
- Keep a safe distance from devices that may be damaged by magnetism
(e.g. monitors, computers, credit cards, memory cards, etc.).
• The instruction manual is an integral part on the instrument.
• Keep this documentation to hand so that you can refer to it when necessary.
• Please read this instruction manual carefully and familiarize yourself with the
product before use.
• Hand this instruction manual on to any other users of the product.
• Pay attention to the safety instructions and warning advice in order to
prevent injury and damage to the product.
Safety and disposal
Follow the testo information document (accompanies the product).
Product-specific safety instructions
5

Data protection
The instrument is only to be used by qualified expert personnel. The
product must not be used in potentially explosive atmospheres!
The testo 400 measuring instrument makes it possible to input and store
personal data such as name, company, customer number, address, telephone
number, e-mail address and website.
Please be aware that your use of the functions offered here is entirely your own
responsibility. This applies to use of the interactive functions (e.g. storing
customer data or sharing readings). You are responsible for compliance with the
data protection regulations and laws applicable in your country. Therefore, it is
your responsibility to ensure the legality of the processing of personal data for
which you are responsible.
The personal data collected with the measuring instrument is never
automatically transferred to Testo Inc. or Testo SE & Co. KGaA.
Use
The testo 400 is an instrument for measuring climate-related parameters. The
testo 400 is ideal for comfort level measurements for the workplace evaluation
and flow measurements in and at ventilation and air-conditioning systems.
6

Product description
Display – user interface (see
section 6.3)
USB interface/
power connection
Probe connections (see section
5.3)
Front view
7