When the instrument is used for a long period of time, regular maintenance is indispensable
for its precision. For use of more than half a year the impacter and proble need cleaning.
When the instrument is often used in a place of high concentration, cleaning and maintenance
time may be determined independently in terms of frequency of use. The user may also
change the impacter snout as required.
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Cleaning the impacter
Twist off the fix screw, remove the impacter from the casing and open the top cover of the
impacter as shown in the figure below. Dust deposited on the impacter plate of the head
should be removed with cleaning agent, alcohol or pure water carefully. After the plate
becomes dry as a bone, it is replaced in the instrument in a reverse order.
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Removal and Cleaning of the Probe
If the knob is turned to O (open) side, it will be ejected. The probe is removed by pulling out
the knob upward slowly. The needle of the proble is fitted with “O” ring, which should not be
damaged when the probe is taken out. When cleaning the probe, pour the cleaning agent into a
beaker of 50 ml first and then dilute with two fold clean water. Finally the probe is placed in
and cleaned for about 16 minutes by an ultrasonic cleanser. When placing the probe into the
cleaning liquid, only “O” ring part on the top of the probe is inserted instead of part above the
ring. After cleaning is over, thorough drying is necessary, otherwise high-tension leakage even
malfunction may occur. Care should be taken. When replacing the probe, make sure that it is
pressed in lightly by aligning the pin on the probe side with the channel guide in the
instrument (the probe socket is seen from top). Finally turn the knob to s side for locking.
Turn on the power source, press MEAS to supply high voltages and confirm if the
high-voltage pointer just points to the center. Note: the probe should not be withdrawn to
avoid affecting the measurement precision.
Fix screw
Impacter plate
18
Probe
