Checking The Clamp Leak-Tightness; Drilling Holes In A Compressed Air Line - TESTO 6448 Instruction Manual

4 Initial operation
4.1.4.

Checking the clamp leak-tightness

Tools:
- Hearing protection
- Pressurised cylinder with valve or compressed air pipe
1. Screw the compressed air bar probe on to the measurement
fitting and tighten.
2. Connect the pressurised cylinder or compressed air pipe to the
quick-release coupling.
4. Using a manometer, leak spray and hearing protection, carry
out a leak-tightness test.
5. In the event of leaks, adjust the torque and carry out the leak-
tightness test again after 20 minutes.
6. Once the test has been passed, remove the compressed air
pipe or pressurised cylinder. Ensure that the valve of the
pressurised cylinder is closed or the compressed air line is
disconnected from the compressed air supply. Then open the
measurement fitting ball valve. Wear hearing protection for this.
4.1.5.

Drilling holes in a compressed air line

22
First close the pressurised cylinder valve or disconnect
the compressed air line from the main supply. Then
open the measurement fitting.
Assembly under pressure may only be carried out by
trained personnel. Before drilling holes in a compressed
air line, always observe the separate instruction manual
for the drill!