VACUUBRAND MZ 8C - Manual (Page 44)

page 44 of 52
Check the performance by measuring the vacuum at the inlet port of the
individual pump head:
Use a suitable vacuum gauge (e.g., DVR 2, cat. no.: 682902), being sure
that it is correctly calibrated. Measure the vacuum at the inlet port (marked
”IN”). A vacuum of less than 120 mbar should be achieved.
+
If the reading is higher, recheck the pump chamber and make sure
that the valves and the diaphragms are correctly seated (diaphragms
concentric with bore).
Individual performance check of a pump head:
Replace diaphragms and valves of all eight pump heads
in the same way.