Contents
Contents
1
About this document ........................................................................... 7
2
Safety and disposal .............................................................................. 7
3
Product-specific approvals ................................................................. 7
4
Product-specific information............................................................... 8
5
Use ......................................................................................................... 8
6
Product description ............................................................................. 9
6.1
Overview of the testo 550s ................................................................................. 9
6.2
Overview of the testo 557s ............................................................................... 10
6.3
Overview of main menu .................................................................................... 11
6.4
Control keys ..................................................................................................... 12
7
First steps ........................................................................................... 12
7.1
Inserting (rechargeable) batteries ..................................................................... 12
7.2
Switching the instrument on and off .................................................................. 13
7.3
Setup wizard ..................................................................................................... 13
8
Using the product ............................................................................... 14
8.1
Preparing for measurement .............................................................................. 14
8.1.1
Operating the valve positioners ................................................................................ 14
8.1.2
Automatic mode ....................................................................................................... 15
8.2
Measuring mode ............................................................................................... 15
8.2.1
Refrigeration ............................................................................................................ 15
8.2.2
Evacuation ............................................................................................................... 19
8.2.3
Pressure Leak Test .................................................................................................. 22
8.2.4
Target Superheat ..................................................................................................... 25
8.2.5
Compressor Test (DLT) ............................................................................................ 29
8.2.6
Delta T ..................................................................................................................... 32
8.3
Bluetooth .......................................................................................................... 33
8.3.1
Probes compatible with the instrument ..................................................................... 33
8.3.2
Establishing a connection ......................................................................................... 34
8.3.3
Switching on/off ........................................................................................................ 35
8.3.3.1
Switching on ............................................................................................................................35
8.3.3.2
Switching off ............................................................................................................................36
8.3.3.3
Manual probe selection ...........................................................................................................36
8.4
Settings ............................................................................................................ 37
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