Data Sheet
Table Of Contents
- 1 About this document
- 2 Safety and disposal
- 3 Product-specific approvals
- 4 Product-specific information
- 5 Use
- 6 Product description
- 7 First steps
- 8 Using the product
- 9 Smart App
- 10 Maintenance
- 11 Technical data
- 12 Tips and assistance
- 13 Support
6 Product description
9
release screw fitting; passage
can be closed via valve
positioner Centre: e.g. for
refrigerant bottles, with sealing
cap, refrigerant hoses with quick-
release screw fitting; passage
can be closed via valve
positioner.
6.2 Overview of the testo 557s
1
Mini-DIN probe socket for NTC
temperature probe, with socket
cover
2
Foldable suspension device
(rear).
3
Display. Instrument status icons 4
Rear
•
Battery compartment
•
Mini USB port for firmware
update
It is not possible to charge
rechargeable batteries in the
instrument.
5
Control keys
6
Sight glass for refrigerant flow