15
78-8136-3182-3
Note: If you should select a start or stop voltage outside of the ranges listed above, the 3M
™
Charge
Analyzer 711 will not store that value. If the charge plate does not reach the set stop voltage within
99.9 seconds the counter stops and the display flashes
TIME EXCEEDED.
This message will appear
in Positive, Negative, and Auto decay modes.
Setting the Offset Time
When the start and stop voltage procedure is completed the
OFFSET
menu will be displayed. The offset time
can be adjusted from 0 (Indefinite time), 1 to 10 seconds (1-second steps), and 10 to 60 seconds (10-second
steps). To change the offset time perform the following steps:
1. Depress “A”
CHANGE
button repeatedly to move through time settings.
2. When the desired time is set, depress the “B”
OK
button to store. The start and stop voltage values with the
offset time value will then be displayed momentarily.
3. Next the display will indicate
TIMER+OFFSET OK
. If values are correct, depress the “A”
YES
button. If
not, depress the “B”
NO
button which will restart the start voltage menu.
4. The display will then indicate
CLEAR MEMORY
if changes were made. Depress the “A”
YES
button to
store the revised settings.
PARAMETER CHANGED
will momentarily appear. If no changes were made,
display will indicate
PARAMETER NOT CHANGED
.
Note: To measure offset balance for time periods longer than 60 seconds, set offset time to zero seconds
“0 s”. This puts the Charge Analyzer CPM in a floating mode for an indefinite time period. The
unit will not have an active timer in this mode. Elapsed time must be recorded by the operator using
a stop watch or other time recording device. Connection to the analog output using a chart recorder
e.g. allows for monitoring of the offset voltage during long time periods. Depressing the “B” button
twice during the indefinite offset time mode returns the display to the DECAY TIME/START mode.
This completes the voltage range zeroing, start/stop voltage, and offset time setup.
Use
1. Remove the red sensor cover from the measurement electrode.
2. Mount the plate electrode (b) to the analyzer. Be sure that the red sensor cover (e) is removed from the
sensor electrode. Display will indicate
DECAY TIME
, voltage polarity (“Either”
POS, NEG,
or
AUTO
)
and
PRESS START.
3. Depress the “A” MODE button to select Positive, Negative, or Auto (Positive & Negative) decay.
Note: In AUTO mode there will be an approximate 5 seconds delay between positive & negative decay tests.
4. The display will now indicate
DECAY TIME: POS, NEG,
or
AUTO
on the first line and
PRESS START
on the second line.
5. Depressing the “A”
YES
button again after
AUTO
decay is displayed will select the
READ OFFSET CPM
menu. Depressing 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
depressed you will return to the start of the DECAY TIME menu.
The charge analyzer 711 is now ready to measure static charge neutralization effectiveness and the offset balance
of ionizers.
