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4.6.2 Leak detection along seams
Move the end of the Gas Check probe (or nozzle) along the length of the seam, so that it just rests
on the seam. The speed at which you move along the seam depends upon the size of the leak that
you search for:
·
If the leak is large, you can move fairly fast along the seam, at approximately 25 mm per
second.
·
If the leak is small, move slowly along the seam, at approximately 10 mm per second.
4.6.3 Leak detection at pipe joints
Use the same procedure as for leak detection along seams (see Section 4.6.2), however move the
probe (or nozzle) around the joint at approximately half the speed specified in Section 4,.6.2. Light
gases (such as hydrogen and helium) diffuse quickly into air, so an apparent leak on the side or top
of a joint may actually be a leak at the bottom of the joint.
4.6.4 Data logging – interruption for menu access
Gas Check 5000is settings are protected during data logging. Press the INFO key to enter a menu
dialogue.
4.7
Switch off the Gas Check
When the Gas Check 5000is has been left for a few seconds without any key press, then press the
I/O key.
The Gas Check will ignore I/O presses during the instrument power up sequence and during any
zeroing.
4.7.1 Auto Shut Down
The unit will auto shut down after approximately 10 minutes.
