8
Section 4
OPERATION
MANUAL OPERATION:
From the manual screen the user can choose to run a positive decay, negative decay or
balance. Also the option exists to enter the group and location screen to select the
proper designation for the ionizer under test.
+
++
+/−
−−
− Decays – Once a decay test is selected the unit switches screens displaying the
plate voltage, timer, group/location and test parameters. Once the test is complete a
summary screen appears displaying the time of decay, test parameters, time, date,
temperature, humidity and test number. From the summary screen another decay test
can be run, test data history screen can be accessed or a return to the manual test
screen can be selected.
Balance – During the balance test the screen displays the plate voltage, test time,
group/location, test parameter, average voltage and positive/negative peak voltage
readings. Once the test is completed the summary screen appears with the same type of
data and options available in the manual decay summary screen.
Confidence Test – One of the major weaknesses in all CPM’s has been the inability to
properly verify the main function of these devices, DECAY. In all the existing instruments
it is possible to test the plate voltage, timer performance and other parameters but not the
actual decay function. In the 288 charge plate (available in the 6 x 6 plate only) there is a
test hole in the center of the plate. Simply remove the knurled thumbscrew from the back
panel of the unit and insert it into this hole making sure that the head of the screw is
making contact with the plate. Then run a +Decay test and a −Decay test in a non-
ionized environment. Both decays should be within a 6 to 8 second range. By
performing this test periodically the user can be assured the unit is operating correctly.
Programming features:
Start Voltage – Range of 10V to 1000V, adjustable in 1V increments
Charge differential – This is the difference between the start decay voltage and how
much over charge the unit puts on the plate. It ranges from 10V to 100V and is
adjustable in 1V increments.
Stop voltage – Range of 0V to 995V, adjustable in 1V increments
Test Start Delay – Range of 5sec to 15sec, adjustable in 1sec intervals. This is the time
delay from when you push the start key and when the test actually begins. This allows
the user to exit the area to minimize their impact on the readings.
Max decay time – Range 10sec to 9999sec adjustable in 1sec intervals. If the unit does
not reach the stop voltage within this time the unit will abort the test. This timer can be
turned off.
Balance Duration – Range of 10sec to 9999sec, adjustable in 1sec intervals. This can
also be set for continuous readings with no time out.
(22 pages)
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