TESTO 420 User manual

testo 420 · Flow Hood
Instruction manual

2

1 Contents
3
1Contents
1Contents.......................................................................................... 3
2Safety and the environment ............................................................. 5
2.1. About this document.......................................................................5
2.2. Ensure safety...................................................................................6
2.3. Protecting the environment .............................................................6
3Specifications .................................................................................. 6
4Technical data ................................................................................. 7
5Product description ....................................................................... 10
5.1. Overview........................................................................................10
5.1.1. Measurement setup ............................................................10
5.1.2. Overview of testo 420 .........................................................11
6First steps...................................................................................... 13
7Using the product .......................................................................... 15
7.1. Switching Bluetooth® on and off ..................................................15
7.2. Settings for the measurement .......................................................16
7.2.1. Damping (Gliding Average)..................................................16
7.2.2. Hood Calibration .................................................................16
7.2.3. Zeroing Interval (Automatic Zeroing) ...................................16
7.3. Volume flow measurement setup ..................................................17
7.4. Measuring......................................................................................20
7.4.1. Volume flow measurement..................................................20
7.4.2. Pitot tube measurement......................................................20
7.4.3. Differential pressure measurement .....................................21
7.5. Saving............................................................................................21
7.6. Transferring measurement data to the PC ....................................22

1 Contents
4
8Maintaining the product ................................................................. 23
8.1. Cleaning the instrument................................................................ 23
9Tips and assistance ....................................................................... 23
9.1. Questions and answers ................................................................ 23
9.2. Accessories and spare parts ........................................................ 24
10 Authorizations................................................................................ 26

2 Safety and the environment
5
2Safety and the environment
2.1. About this document
Use
> Please read this documentation through carefully and
familiarize yourself with the product before putting it to use.
Pay particular attention to the safety instructions and warning
advice in order to prevent injuries and damage to the products.
> Keep this document to hand so that you can refer to it when
necessary.
> Hand this documentation on to any subsequent users of the
product.
Symbols and writing standards
Representation Explanation
Warning advice, risk level according to the
signal word:
Warning! Serious physical injury may occur.
Caution! Slight physical injury or damage to
the equipment may occur.
> Implement the specified precautionary
measures.
Note: Basic or further information.
1. ...
2. ...
Action: more steps, the sequence must be
followed.
> ... Action: a step or an optional step.
- ... Result of an action.
Menu Elements of the instrument, the instrument
display or the program interface.
[OK] Control keys of the instrument or buttons of
the program interface.
... | ... Functions/paths within a menu.
“...” Example entries