3
Introduction
Dear Customer
You have made the right decision by choosing a measuring instrument from Testo. Thousands of
customers buy our high standard products every year. There are at least 7 good reasons for doing so:
1) Cost - performance ratio. Reliable quality at a fair price.
2) Extended warranty times of up to 3 years - depending on instrument.
3) We have the ideal solutions for your measuring tasks based on our expert experience gained
over 40 years.
4) Our high quality standard is confirmed by the ISO 9001 certificate.
5) Of course, our instruments carry the CE symbol required by the EU.
6) Calibration certificates for all relevant parameters. Seminars, advice and calibration on location.
7) Our after-sales service. Ask for more details.
Your measuring instrument is a flexible, future-oriented system whose range of operations and
software can vary according to installation.
Once the instrument is switched on, you will receive information on the type of instrument installed,
the serial number as well as information on the current software version in the instrument. Additional
information on our service points, for example, can be printed
(See page 16).
(See page 16).
The instruction manual describes the maximum available range of functions in the
testo 400. testo 650 and testo 950 have limited derived functions in relation to the probes which
can be connected and the parameters which can be analysed - See table:
testo 650 and testo 950 can also be subsequently upgraded to include the full range of functions of
testo 400.
We will also continue to make branch-specific and user-specific software updates for these
instruments available to you. All you need to do is register yourself as a user so that we can inform
you directly via NEWS.
This documentation describes the Software Version 2.0.
Parameter testo 400 testo 650 testo 950
Temperature °C x x x
Humidity %RH x x -
Pressure hPa ... bar x x -
Velocity m/s, m
3
/h x - -
Gas CO x x x
Gas CO
2
xxx
rpm x x x
Voltage V x x x
Current I x x x
WBGT °C x - -
NET °C x - -
i
Update on disk
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