3M Charge Analyzer 711, Руководство пользователя

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5. Pressing the “A” YES button again after AUTO decay is displayed will select
the READ OFFSET CPM menu. Pressing the “A” YES button will initiate
the system verification and the display will respond with UPDATING.
Note: System verification (Zero point adjustment) is only recommended before the first
measurement, when parameters are first set with the attachment of the plate electrode. If the “B”
button (NO) is pressed you will return to the start of the DECAY TIME menu.
The 3M
™
Charge Analyzer 711 is now ready to measure static charge
neutralization effectiveness and the offset balance of ionizers.
Demonstration #6 Charge Plate Monitor and Static Decay Time Measurements – Air
Gun Ionizer
Static neutralization (the ability to reduce or
eliminate a charge on a surface) is an important
quality for ionizers. Static decay time is
defined as the time interval needed to reduce
a defined voltage potential on an object to a
defined lower potential by means of applied
ionized air. Another important aspect for
ionizers is the ability to produce a balanced
stream of positive and negative ions. The
Charge Analyzer 711 can be used to accurately
measure both of these parameters.
Note: For more detailed information on measuring the
performance of ionizers refer to the ESD standard ANSI/
EOS/ESD-S3.1 for Protection of Electrostatic Discharge
Susceptible Items-Ionization.
1. Press the “B” (START) button to charge
the plate and begin the measurement menu.
2. On the first line the selected start and stop voltages are indicated. On the
second line, the plate default charge-voltage is indicated (approximately 1200
volts).
Note: If the charge plate does not retain the applied voltage it may be due to a high level of room
humidity or contamination on one or more of the four spacers. Spacers should be cleaned with
laboratory grade alcohol. Use clean cotton or latex gloves when directly handling these spacers.
3. Position the ionizing air gun above the charge plate and activate the air gun
blowing ionized air at the plate. The timer in the Charge Analyzer 711 will
begin counting (in 1/10’s of seconds) when the set start voltage is reached on
the plate. At this time the display will indicate TIMER (present timer count in
seconds) and U (present voltage level on the charge plate).