30
BM
series
6.5.
Ionizer
(Neutralization Device)
The
BM
series is equipped with four ionizer electrode units to neutralize static electricity from a
charged weighing sample.
Neutralizing static electricity before weighing will improve stability, reducing errors.
Neutralizing ion : The discharge electrodes of the ionizer continuously generate bipolar ions by corona
discharge. Applying these ions to the weighing sample neutralizes the static charge.
Static electricity : In general, when the ambient humidity is less than 45% RH, nonconductors
such as powders, paper and plastics easily become charged with static
electricity. The influence of the static electricity may cause a weighing error of
several milligrams. The ionizer effectively neutralizes the electrical charge.
Operation
1 Place the sample to be weighed on the center
(of the metallic circle) of the separation plate to
neutralize the static charge.
2 Press
the
ION
key to start the neutralization.
The
mark and the LED blink.
The neutralization will stop after the preset time
of "Neutralization time (
ion
)" in the function
table (the factory setting is 3 seconds).
The minimum display of the
BM-20
,
BM-22
and
BM-252
is switched to 0.1 mg while performing the neutralization.
Pressing
the
ION
key during neutralization stops
the neutralization.
Notes
Keep the weighing sample away from the electrodes
while neutralizing. Placing the sample too close to the
electrodes may cause the sample to become charged.
Remove any obstacle between electrodes and the weighing sample.
6.5.1.
Maintenance of the Electrode Units
When using the ionizer for a long time, dust and stains may
stick to the electrodes. Clean them periodically to maintain
performance.
When needles of the electrodes are worn down and
neutralization ability is not restored after cleaning them,
replace all four electrodes with new ones. The standard life of
an electrode unit is approximately 10000 hours.
Replacing the electrode units
1 Turn the electrode units 45 degrees counterclockwise and
remove them from the ionizer.
2 Replace all four units with new ones.
Note
Do not replace, remove and clean the electrodes
while the ionizer is in operation as there is a danger
of electrical shock.
3 Turn the electrode units 45 degrees clockwise and insert them into the ionizer.
Ionizer
LED
Sample
Separation plate
Press
In neutralization
Weighing mode
Example: Display of
BM-20
,
BM-22
Electrode unit
Step 1
Step 2
Cleaning
Electrode needle
Summary of Contents for BM series
Page 1: ...Analytical Balance BM 20 BM 22 BM 252 BM 200 BM 300 BM 500 1WMPD4002195D ...
Page 8: ...6 BM series ...
Page 113: ...BM series 111 MEMO ...
Page 114: ...112 BM series MEMO ...
Page 115: ...13 ...
