Monroe Electronics Charge Plate - Ionizer Performance Analyzer - model 287A - Manual (Page 6)

c) Press and release ‘+ CHARGE’. This will start a manual test where the test voltage
is positive.
(i) The instrument performs an autozero.
(ii) The floating plate is charged to >+1050 volts.
(iii) The plate begins to discharge. If allowed to discharge to <+1000 volts
the timer will start at +1000 volts.
(iv) This is a single positive manual decay test. The test is labeled ‘M1+’
(Manual, Test 1, + [positive]).
Abort this test by pressing the ‘CANCEL’ button.
d) Use the ‘  CHARGE’ button similarly to perform negative manual decay tests. Up to
ten manual decay tests may be run in any polarity order. The ten tests will be
labeled 1 thru 0 with the polarity indicated. Thus, the 5
th test might be labeled ‘M5 ’.
3) Shut the instrument off (press and release ‘ON-OFF’). You will need at least an ionizer
and a ground connection to proceed.
Further familiarization —
In order to become more familiar with the accumulation and presentation of data we will
perform two automatic test sequences and a few manual tests and then examine the results:
1. Set up the ionizer.
2. Ground the IPA 287a. A ground jack is provided on the side of the instrument case.
3. Access the main menu. The display should show 0% values for Automatic and
Manual memory usage.
If a message prompts you to ClrData (clear data),
a) Scroll to ‘Y’ with either the  or  button.
b) Accept this by pressing ‘ENTER’.
4. Run an automatic test sequence —
a) Press ‘AUTO’.
b) Let the test run its course. This is ‘Test 1’.
i) Six decay tests are run. These are in the order +++  or +++
depending on the current autosequence setup.
ii) A balance test is run. The duration of the balance test may be any value
between 10 and 90 seconds or it may be turned off in the SETUP menu.
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