Monroe Electronics Charge Plate - Monitor - model 288B User Manual
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Section 2
GENERAL INFORMATION
Model 288 performs manual or automatic decay and balance tests for qualification and
periodic verification of ionization equipment. It then stores the results and balance averages
for manual tests and complete automatic test sequences up to a maximum of 1500 tests.
Temperature and relative humidity are displayed real-time and recorded with the test data.
All instrument functions are controlled by five key pushbuttons.
In DECAY mode a built-in high voltage generator charges the plate to a voltage specified by
the user – up to 1100 volts. During the test the plate will discharge toward zero in the
presence of ionization. The elapsed time of decay between a selected start voltage and a
selected stop voltage is displayed.
In the BALANCE mode,
the plate is first grounded then released from ground and allowed to
float to any voltage in response to air ion imbalances. It displays the plate voltage, test
duration, and minimum and maximum peak voltages. (Nearby charge sources will also
induce a voltage on the floating plate.)
Self-tests include battery check and tests for functional errors.
Memory is non-volatile. Setup and data are retained during storage.
CAUTION
When charged, the plate voltage can be in excess of 1100 volts with respect to ground.
Although the charges and potentials are below those that are normally detected by
human senses, A SHOCK HAZARD EXISTS.
If you are handling the plate assembly or conducting a test, which involves
touching the plate, expect a shock.
Do not charge large capacitors with this device.