1 Contents
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1Contents
1Contents ...................................................................................................3
2Safety and the environment....................................................................4
2.1. About this document........................................................................4
2.2. Ensure safety...................................................................................5
2.3. Protecting the environment..............................................................5
3Specifications ..........................................................................................5
3.1. Use ..................................................................................................6
3.2. Technical data .................................................................................6
3.2.1. Bluetooth module.............................................................................................6
3.2.2. General technical data .....................................................................................6
4Product description...............................................................................10
4.1. Overview........................................................................................10
4.1.1. Measurement setup .......................................................................................10
4.1.2. Overview of testo 420 .................................................................................... 11
5First steps ..............................................................................................13
6Using the product ..................................................................................15
6.1. Switching Bluetooth® on and off....................................................15
6.2. Settings for the measurement........................................................16
6.2.1. Damping (Gliding Average)............................................................................16
6.2.2. Hood Calibration ............................................................................................16
6.2.3. Zeroing Interval (Automatic Zeroing).............................................................. 16
6.3. Volume flow measurement setup ..................................................17
6.4. Measuring......................................................................................20
6.4.1. Volume flow measurement.............................................................................20
6.4.2. Pitot tube measurement.................................................................................20
6.4.3. Differential pressure measurement ................................................................21
6.5. Saving ...........................................................................................21
6.6. Transferring measurement data to the PC ....................................22
7Maintaining the product ........................................................................23
7.1. Cleaning the instrument.................................................................23
8Tips and assistance...............................................................................23
8.1. Questions and answers .................................................................23
8.2. Accessories and spare parts .........................................................24
9Authorizations........................................................................................25
