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Summary of Contents for Monroe Electronics 268A
- Page 1 Operator’s Manual Monroe Electronics, Inc. Model 268A Charge Plate Analyzer P/N 0340097 288B-1/100 08312016 100 Housel Ave PO Box 535 Lyndonville NY 14098 1-800-821-6001 585-765-2254 fax: 585-765-9330 monroe-electronics.com...
- Page 2 Warranty Return Policy Section 2 Specifications Section 3 General Information Operation Section 4 Maintenance APPENDIX I Variable Timer Trip Point Option ....... APPENDIX II Application Note APNE-0017 Plate Self Decay of Charged Plate Monitors Copyright© 1998 Monroe Electronics, Inc. Printed in USA...
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Page 3: Warranty
Monroe Electronics unless in writing signed by a duly authorized representative of Monroe Electronics. In the event of a breach of the foregoing warranty, the liability of Monroe Electronics shall be limited to repairing or replacing the non-conforming goods and/or defective work, and in accordance with the foregoing, Monroe Electronics shall not be liable for any other damages, either direct or consequential. -
Page 4: Factory Repairs To Modified Equipment
Repairs will be returned promptly. Repairs are normally returned to the customer by UPS within 10 to 15 working days after receipt by Monroe Electronics, Inc. Return (to the customer) UPS charges will be paid by Monroe Electronics on warranty work. -
Page 5: Specifications
Section 2 SPECIFICATIONS CHARGED PLATE/PROBE ASSEMBLY: ■ Designed to EOS/ESD Association standard ■ Standard tripod mount ■ Dimensions: 6" X 6" ■ Capacitance: Total discharge test circuit with plate 20 picofarads, ±2 pf ■ Plate self-discharge: Less than 10% of set voltage within 5 minutes below 50% RH at 25°C POWER SUPPLY: ±6000 volts maximum output;... -
Page 6: General Information
Section 3 GENERAL INFORMATION The Charged Plate Analyzer Model 268A separates into two components connected by a ten-foot cable. The top part with the plate attached contains the fieldmeter portion of the instrument and may be placed at the measurement site. The bottom part with the controls and indicators may be placed in a convenient operating location remote from the detector. -
Page 7: Important Note
The Charged Plate Analyzer Model 268A meets test equipment requirements of the EOS/ESD Association's EOS/ESD STANDARD NO. 3.1 "STANDARD FOR PROTECTION OF ELECTROSTATIC DISCHARGE SUSCEPTIBLE ITEMS: IONIZATION". -
Page 8: Operation
OPERATION BASIC OPERATION - DISCHARGE MODE: Separate sections and position as necessary. Connect to the proper power source and press "|" on the power switch to apply instrument power. The displays will indicate that power is on. Select a polarity. For discussion purposes, we will select positive. Press the POLAR pushbutton in to lock. - Page 9 BASIC OPERATION - PEAK MODE: Peak mode is useful for checking balance in pulse ionizing systems. The timer is not associated with these measurements. The internal high voltage charging source is not normally used. The switches used in making peak measurements are the three selector switches under the PLATE VOLTAGE meter and the ZERO and DECAY switches.
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Page 10: Maintenance
Section 4 MAINTENANCE GENERAL: Field maintenance of Model 268A should be limited to cleaning of the insulating standoffs, cleaning of the case and occasional field-meter zero adjustment. Further repairs and adjustment require special equipment and are beyond the scope of this manual. - Page 11 MODEL 268A-1T CHARGED PLATE ANALYZER WITH VARIABLE TIMER OPTION VARIABLE TIMER OPTION The Model 268A-1T Charged Plate Monitor with variable timer stop option has the same two timer ranges as the standard unit when set in the "FIXED" mode of operation. In the optional "VARIABLE"...
- Page 12 APPENDIX II Application Note APNE-0017 Plate Self Decay of Charged-Plate Monitors Introduction Charged-Plate Monitors (CPM's) evaluate the ability of air ionizers to neutralize static charge. A CPM charges an isolated, conductive plate that is charged to a known level. Then the air ions produced by the ionizer neutralize the charge on the isolated plate, and the time required to discharge the isolated plate is measured.
- Page 13 24 hours. Another Solution Monroe Electronics' newer CPM, Model 288, uses a high-voltage follower (electrometer) technology that is much more resistant to the effects of high humidity. We recommend this...
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