Using The Product; Preparing For Measurement; Operating The Valve Positioners - TESTO 570 Series Instruction Manual

7 Using the product

2
Take a photo of the QR code of the
testo Smart App and press
[Menu/Enter]
-
The measurement menu is displayed.
7 Using the product
7.1

Preparing for measurement

7.1.1

Operating the valve positioners

With respect to the refrigerant path, the digital manifold behaves just like a
conventional four-way manifold: The passages are opened by opening the
valves. The applied pressure is measured with the valves closed and the valves
opened.
-
Open the valve: Turn valve positioner anticlockwise.
-
Close the valve: Turn valve positioner clockwise.
Valve positioner tightened too tightly.
•
Damage to the PTFE seal (1).
•
Mechanical deformation of the valve
piston (2) leading to the PTFE seal (1)
falling out.
•
Damage to the thread of the threaded
spindle (3) and the valve screw (4).
Broken valve knob (5).
Only tighten the valve positioner hand-tight.
Do not use any tools to tighten the valve
positioners.
16
to confirm.
WARNING