The model 288B is the first charged-plate monitor offering on-board data storage to automate ionization system testing. Use the Model 288B to perform the customary manual tests, or program it to perform a series of automated decay and balance tests.
Soft keys simplify the programming and operation of automated tests. Upload test set-ups and ionizer locations. Download stored test results, including environmental data captured by integral temperature and relative humidity sensors. The Model 288B uses a novel voltage-follower measurement technique to increase stability, bandwidth, and accuracy, making it ideal for testing the most modern critical-balance ionizers.
Features：
NEW: Auto Ranging to 0.1V resolution below 100V
NEW: Compatible with Monroes Optional New 288B Graphing Software
Test all types of Ionizers
Automated testing reduces ionizer test time and data logging time
Adjustable start and stop voltages for decay test accommodate specialized needs
Large, easy-to-read, high-contrast LCD display
Detachable ion collecting plates can be placed at the work height or placed within process equipment to evaluate ionizers while in use
Small ion collecting plates are available to permit measurements in confined spaces
LED bar graph shows balance voltage in real time
Display 240 x 64 character/graphic
Voltage - 3½ digit display (Decay and Peak reading)
Accuracy ±0.1% of reading ±3 V
Resolution 1 volt
Balance - 0.1 volt for readings < 150 volts
Time - 4 digit display
Accuracy 0.1% of reading ±1 lsd
Resolution 0.1 second for readings < 1000 seconds
1 second for reading > 999 seconds
Electrometer
Dynamic range ±1200 volts
Follower error < 10 mV
Speed of Response <10 msec for 1 kV to 0 volts (90%-10%)
Bandwidth -3db @ 1Khz 20Vp-p
-3db @ 10Hz 2000Vp-p
Noise < 12 mV rms
Monitor output Divide by 200
Accuracy 0.1% of reading ±1 mV Refer to Output
Output Impedance 1K ohm
Start Voltages 1000 volts Standard
Range ±10 to ±1000 volts
Resolution Settable to 1 volt
Accuracy 0.3% of setting ±2.5 volts
Stop Voltages 100 volts Standard
Range 0- ±995 volts
Resolution Settable to 1 volt
Accuracy 0.3% of setting ±2.5 volts
Charge Voltage
Range 10 to 100 volts above the start voltage
Resolution Settable to 1 volt increments
Accuracy 0.3% of setting ±2.5 volts
Charge Plate
Capacitance 20 pF ±2pf
Zero Drift < 100 mV/sec (no incident ion flow)
Self Discharge < 200 mV/sec
Peak Detector(Balance Test)
Bandwidth <10HZ
Temperature Sensor
Range 0 - 50°C
Accuracy ±2°C typ
Humidity Sensor
Range 10% - 80% RH @ 25°C
Accuracy ±5% typ
Operating
Temperature 5°C to 35°C
Humidity to 80%, non condensing
Battery life Typ > 6 hrs
Charge Time < 8 hrs to > 90% capacity
Power
Voltage 90 - 250 VAC 50/60 Hz
Wattage < 12 watts operating
Data Storage 1500 Readings
CPM
Size 11” x 9” x 6” (280 x 229 x 152 mm)
Weight 12½lb. (5.7kg)
