Part #: 288B 
The Model 288B’s easy-to-use, self-contained design simplifies ionizer audits: Testing your  ionizers is as simple as pushing a button. Model 288B is the first  Charged Plate Monitor to incorporate a microprocessor and data storage,  eliminating the need for a dedicated computer. All test parameters are  programmable allowing tests to be optimized and not dictated by  equipment limitations.
                     
                     Once programmed, the Model 288B will perform a series of tests automatically: +/- decays, balance, balance peaks, temperature, humidity, time/date are stored and may be reviewed via the display or  downloaded to a PC. The PC software (included) permits the user to  define and name ionizer locations, test setups and sequences, then  upload these to the CPM. All of these features result in a flexible,  easy to use instrument that facilitates audits while minimizing errors.
                       
                     Features:
                     -  Innovative non-contacting electrometer
 provides tests to unprecedeted low
 voltage with unmatched stability
- Fully configurable operating parameters
- Soft keys for highly intuitive programming
- Manual and automated testing of Decay
 and Balance
- Internal storage for up to 1500 tests, 500
 locations and 4 test protocols
-  Internal battery for portable operation
 (also line operated)
- Large, easy to read, high contrast LCD
 display
- Detachable 6” x 6” plate
 (Optional plate 1” X 1” plate available)
 
- RS232 interface
 
- Built in temperature and humidity
 sensors
 
-  Auto-ranging to 0.1V resolution below
 100V
 
- Compatible with new 288B Graphing
 Software