User's Manual

5 Using the manifold
10
5 Using the manifold
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5.1. Preparing for measurement
5.1.1. Switching the instrument on
> Press
[ / ].
Zero the pressure sensors before every measurement.
✓ All connections must be at ambient pressure.
> Press
[P=0] key for 3 seconds to execute zeroing.
Connecting the refrigerant hoses
Before each measurement check whether the refrigerant
hoses are in flawless condition.
✓ Make sure the valve stem shutoffs are closed.
1. Connect the refrigerant hoses to the low-pressure side (blue)
and high-pressure side (red).
2. Connect the refrigerant hoses to the AC/R system.
WARNING
Dropping this instrument or any other comparable mechanical
shock can damage the refrigerant pipes and hoses. The valve
actuators may also suffer damage, which in turn could result in
further damage inside the instrument and may not be
detectable from outside.
> For your own safety you should return the manifold to the
Testo Service Department for technical inspection.
> You should therefore always replace the refrigerant hoses with
new ones after an accidental drop has occurred or after any
visible wear and tear.
Choosing the refrigerant
1. Press
[R, ►, ■].
- It activates the refrigerant menu and the currently selected
refrigerant flashes.
2. Setting the refrigerant: