testo 557
www.testo.com
Data sheet
Bluetooth connection to testo Smart App for quick,
convenient monitoring and reporting on site
Refrigerant update in the instrument via App
4-way valve block for fast and efficient work
External vacuum probe supports evacuation of the system
with highly precise measurement
250 hours‘ battery life
Calculation of superheating/subcooling in real time via two
external temperature probes
testo 557 – the manifold with
Bluetooth, external vacuumprobe
and 4-hose filling set for
commissioning, service and
maintenance
bar
psi
°C/°F
hPa
The testo 557 digital manifold opens up new possibilities
for efficient analysis and documentation– via Bluetooth
connection to the testo Smart App. The wireless connection
enables users to read the measurement data on a
smartphone or tablet and thus to work considerably faster
and more conveniently. Measurement data is automatically
saved in the app and measuring points can be assigned
for straightforward documentation. In addition to this, the
user can finalize and send the measurement report directly
on site. The App alows the list of stored refrigerants to be
updated, for example.
The external probe is also perfect for highly precise vacuum
measurements. The testo 557 digital manifold is suitable for
all measurements on a refrigeration system or heat pump.
The manifold has a robust 4-way valve block with additional
connection possibilities, for example for a vacuum pump or
a refrigerant bottle. This provides a considerable handling
advantage, and enables fast, safe and efficient work in
commissioning, service and maintenance.
micron
kPa
MPa
inch Hg
Digital manifold
Bluetooth
+ App
testo Smart App
for free download
testo 557
Technical data / Accessories
testo 557 set
testo 557 kit, digital manifold with Bluetooth
and 4-hose filling set for commissioning,
service and maintenance; incl. 4-hose
filling set, 2 x clamp temperature probes,
external vacuum probe, batteries, case and
calibration protocol
Part no. 0563 2557
General technical data
Operating temperature -20 to +50 °C
Storage temperature -20 to +60 °C
Battery life 250 h (without illumination,
without Bluetooth
®
, without vacuum probe)
Dimensions 220 x 125 x 70 mm
Weight 1200 g
Protection class IP42
Refrigerants in the
instrument
Refrigerant updates
via App
R114; R12; R123; R1233zd; R1234yf;
R1234ze; R124; R125; R13; R134a; R22;
R23; R290; R32; R401A; R401B; R402A;
R402B; R404A; R407A; R407C; R407F;
R407H; R408A; R409A; R410A; R414B;
R416A; R420A; R421A; R421B; R422B;
R422C; R422D; R424A; R427A; R434A;
R437A; R438A; R442A; R444B; R448A;
R449A; R450A; R452A; R452B; R453a;
R454A; R454B; R454C; R455A; R458A;
R500; R502; R503; R507; R513A; R600a;
R718 (H₂O); R744 (CO₂)
R11; FX80; I12A; R1150; R1270; R13B1;
R14; R142B; R152A; R161; R170; R227;
R236fa; R245fa; R401C; R406A; R407B;
R407D; R41; R411A; R412A; R413A; R417A;
R417B; R417C; R422A; R426A; R508A;
R508B; R600; RIS89; SP22
Sensor types
Pressure Temperature
Measuring range -1 to 60 bar -50 to +150 °C
Accuracy (at 22 °C) ±0.5 % fs ±0.5 °C
Resolution 0.01 bar 0.1 °C
Probe connections 3 x 7/16“ – UNF + 1 x 5/8‘‘ – UNF 2 x plug-in (NTC)
Overload 65 bar –
Vacuum
0 to 20000 micron
1 x plug-in (external vacuum probe)
±(10 micron + 10 % of m.v.)
(100 to 1000 micron)
–
Part no.Accessories for measuring instrument
0516 0012Transport case for testo 550 and accessories (also suitable for testo 557)
1 micron (0 to 1000 micron)
10 micron (1000 to 2000 micron)
100 micron (2000 to 5000 micron)
500 micron (5000 to 10000 micron)
5000 micron (10000 to 20000 micron)
Compatability requires iOS 12.0 or newer /
Android 6.0 or newer
requires mobile end device with
Bluetooth4.0
0554 5570
Spare valve set; exchange of 2 valve mechanisms with 4 valve knob covers (red, blue, 2 x black),
compatible with testo 549, testo 550, testo 557 and testo 570.
Technical data 4-hose filling set
• Hoses (blue, red, 2 x yellow)
for all common refrigerants, including R410A
• Length 1.5 m with 3 x connections 7/16" UNF straight and
7/16"UNF angled 45°
• 1 x connection 5/8" UNF straight and 5/8"UNF angled 45°
(for vacuum pump
• 3 x working pressure 55 bar, bursting pressure 275 bar
• 1 x working pressure 40 bar, bursting pressure 200 bar
(for vacuum pump)