TESTO 445 - Foreword

Dear Customer
You have made the right decision by choosing a measuring instrument from Testo. Every year,
thousands of customers purchase our high-quality products. There are many good reasons for this.
1) We offer value for money. Reliable quality at the right price.
2) Considerably longer guarantee periods of up to 3 years - depending on the instrument.
3) With over 40 years of specialist experience we are optimally equipped to solve your measuring
tasks.
4) Our high quality standards are confirmed by ISO 9001 certification.
5) It goes without saying that our instruments bear the CE mark required by the EU.
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Foreword
6. Instrument configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22-26
“AutoOFF” power save function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Setting power supply, with rechargeable battery or battery . . . . . . . . . . . . . . . . . . . . . . . . . .23
Setting date/time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Setting parameters for absolute pressure and density compensation . . . . . . . . . . . . . . . . . .25
Unit selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Factory reset . . . . . . . 26
7. Velocity measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27-28
Volume flow funnel (testo 445) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Pitot tube and pressure probe (testo 445) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Thermal anemometer probes (testo 445) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
8. CO/CO2 measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29-30
Measuring absolute pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31-32
Error messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34-35
Ordering data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36-43
Contents