testo 550 Digital Manifold
with Bluetooth/App
Temperature port on each side
2 line, back lit LCD display
Control keys
Pressure zeroing
Escape Key
3 x 1/4” SAE connections
Show Min/Max/Mean values
Valve knobs
Min, Max and Mean
Warranty
Troubleshoot,
evacuate, charge
AC, heat pump or
auto mode
Conduct leak test
The testo 550 has a two year warranty. If registered, the warranty is extended to 5 years.
Pic. 16
Arrow keys
Power On/Off
Backlight
Bluetooth Activation
The testo 550 now comes standard with Bluetooth.
1. First turn on the testo Refrigeration App on
your smart device.
2. Once the app is running, turn on the testo
550.
3. Press and hold the UP and DOWN arrow
simultaneously to activate Bluetooth.
4. The Bluetooth icon will flash to the left of the
battery display icon and remain on once
bluetooth is activated. (Pic. 16)
5. The app will now show your 550 as an
available device. (Pic 17)
6. Select your instrument in the app to pair your
device.
Pic. 17
The testo 550 offers the ability to display Min, Max
and Mean measurement values.
1. Simply press the Min/Max Mean button to cycle
this setting.
2. Pressing this button once will display the Min
setting.
3. Pressing the button twice will display the Max
setting.
4. Pressing the button three times will display the
Mean setting.
5. Pressing the button a fourth time will return the
setting to the standard measurement display
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