User Instructions

4 Use
4
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4 Use
The testo 400 is an instrument for measuring climate-related parameters. The
testo 400 is particularly suitable for carrying out comfort level measurements for
workplace evaluation and flow measurements in and on air conditioning
systems.
The instrument is only to be used by qualified expert personnel.
The product must not be used in potentially explosive atmospheres!
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5 Product description
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5.1 Front view
1
On/Off button
2
Display – user interface
(see section 6.3)
3
USB port/mains connection
4
Probe connections
(see section 5.3)