The testo 557 four valve manifold with a built in vacuum gauge is the next high performance, low cost Refrigeration System Analyzer from testo. The built in vacuum gauge allows the technician to know when they have reached the limits when evacuating a system. Building upon the easy to use platform designed by testo, the 557 has 2 NTC temperature probe inputs and can simultaneously calculate superheat and subcooling in real time. The 557 is ideal for servicing, maintaining and commissioning all types of air conditioning systems. The 557 will also perform leak tests on AC/R systems with temperature compensation, insuring accurate results. The testo 557 retains the robust housing that protects the analyzer from the everyday bumps and drops. It comes complete with 2 clamp probes, integrated hook, built in hose holders and a hard carrying case. Features

• Built in Vacuum Gauge
• Robust valve block with 4 connections and built in sight glass
• 2 temperature probe inputs for simultaneous real-time calculation of superheat and subcooling
• Readings are displayed within seconds
• Compact design for ease of use, transport and setup
• Large easy to read back-lit display
• Robust housing that protects the analyzer
• 40 Refrigerants stored eliminating the use of PT charts

Pressure	kPa / MPa / bar / psi
Temperature	°C / °F / K
Vacuum	hPa / mbar/ Torr / inH2O / Micron / inHg / Pa
SENSORS:
Pressure	2 x pressure sensors
Temperature	2 x NTC
Interfaces	3 x 7/16" UNF, 1x 5/8" UNF, NTC measurement
MEASURING RANGES:
Pressure HP/LP(rel):	-14.7 to 725 psi / -100 to 5000 kPa -0.1 to 5 Mpa / -1 to 50 bar
Temperature:	-58 to 302°F / -50 to +150°C
Vacuum (rel)	-1 to 0 bar
Overload pressure	52 bar, 5200 kPa, 5.2 Mpa, 754 psi
RESOLUTION:
Pressure	0.01 bar / 0.1 psi / 1 kPa / 0.001 Mpa
Temperature	0.1°C / 0.1°F
Vacuum	1 hPa / 1 mbar / 0.5 Torr / 0.5 inH2O / 0.02 inHg / 500 Micron / 100 Pa
ACCURACY (@ 22°C/71.6°F):
Pressure	±0.5% fs (±1 digit)
Temperature	±0.5 °C (±1 digit)
Vacuum	±1% fs (±1 digit)
No. of refrigerants	40
Selectable refrigerants	no refrigerant, R12, R22, R123, R134a, R227, R290, R401A, R401B, R402A, R402B, R404A, R406A, R407A, R407C, R408A, R409A, R410A, R411A, R413A, R414B, R416A, R417A, R420A, R421A, R421B, R422A, R422B, R422D, R424A, R427A, R434A, R437A, R438A, R502, R503, R507, R600, R600a, R718, R744 (only up to 50bar / 725psi), R1234yf (display: T8)

Measurable media	Measurable media: All media that are stored in the testo 557. Not measurable: Ammonia (R717) and other refrigerants which contain ammonia
AMBIENT CONDITIONS:
Operating temperature	-20 to 50°C / 14 to 122°F
Storage temperature	-20 to 60°C / -4 to 140°F
Humidity application range	10 to 90 %RH
HOUSING:
Material	ABS / PA / TPE
Dimensions	approx. 11.02 x 5.3 x 3.0 in
Weight	approx. 3 lbs (without batteries)
IP-class	42 (hanging)
POWER SUPPLY:
Current source	Rechargeable batteries / batteries 4x 1.5 V, type AA / mignon / LR6
Battery life	approx. 150 h (no display ilumination)
DISPLAY:
Type	illuminated display
Response time	0.5 s
Directives, standards and tests:	EC Directive: 2004 / 108 / EC
Warranty Duration:	2 years warranty conditions: see website www.testo.com/warranty

testo 557 Kit:

• Digital manifold
• 2 clamp probes
• Batteries
• Calibration protocol
• Hard case

Order no. 0563 5572

The new testo 557 Refrigeration System Analyzer Download a copy of the testo 557 Data Sheet