Monroe 288B Charge Plate Monitor

• Innovative High Voltage electrometer provides tests to unprecedeted low voltage with unmatched stability
• Meets ESD Association Standard ANSI / ESD STM 3.1
• 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 optional 288B Graphing Software

Model : Monroe 288B

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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.

Display	240 x 64 character/graphic Voltage – Accuracy Resolution: 3½ digit display (Decay and Peak reading) ±0.1% of reading ±3 V 1 volt Balance -: 0.1 volt for readings < 150 volts Time – Accuracy Resolution: 4 digit display 0.1% of reading ±1 lsd 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)

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