KANOMAX 3522 Piezobalace Dust Monitor - Manual (Page 26)

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8.3 Installing the Needle
To reinstall the needle, look into the inlet from above and align the high-voltage terminal on the
side of the needle with the groove inside the inlet, then slowly twist in the needle. When the
needle is fully inserted, lock it in place by turning the knob to the “S” mark until it cannot be
turned any further.
Turn on the power and press [MEAS/CLN] to confirm that high voltage current is being supplied,
and that the pointer stops at the center of the high voltage indicator frame.
Caution:
¾ The needle should be removed only when necessary. Do not pull out the needle unless you are
cleaning or replacing it.
¾ If the screw portion at the center of the knob is visible, the needle may not be inserted properly.
8.4 Replacing the Impactor Nozzle
The instrument is equipped with a 10 µm impactor nozzle before shipping.
To perform a working environment measurement, replace the 10 µm nozzle with the 4 µm nozzle.
(1)
(2)
Needle inlet
High voltage
terminal
PIEZOBALANCE DUST
MONITOR
MODEL 12
10 µm
Cutting efficiency 98%
4 µm
Cutting efficiency 50%
Impactor body
Impactor knob
Impactor nozzle