testo 550 Digital Manifold
2012 Quick Start Guide
Temperature port on each side
2 line, back lit LCD display
Control keys
Pressure zeroing
Power On/Off
Arrow keys
Backlight
3 x 1/4” SAE connections
Show Min/Max/Mean values
Valve knobs
Vacuum Indication
Testo 550 is capable of gross vacuum indication. The
measurement is performed on the low-pressure side.
1. Press the [Mode] button twice to get to the
vacuum indication menu (Pic. 14).
2. Start the evacuation.
3. The 550 will indicate the vacuum on the
low-pressure side.
Remember, vacuum indication is performed in inHg.
The testo 550 does not have the resolution to read mi-
crons and a separate vacuum gauge is recommended
for vacuum measurement.
1 inHg = 25,400 microns
Warranty
Troubleshoot,
evacuate, charge
Cool, heat pump or
auto mode
Conduct leak test
Testo INC., 40 White Lake Road, Sparta, NJ 07871
(800) 227-0729, email: [email protected],
www.testoUSA.com/refrigeration
QSG550_June2012
The testo 550 has a two year warranty
Pic. 14
