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Summary of Contents for Monroe Electronics 268A-1
- Page 1 Operator’s Manual Charged Plate Analyzer Model 268A-1 100 Housel Ave ⏐ PO Box 535 Lyndonville NY 14098 1-800-821-6001⏐ 585-765-2254 ⏐ fax: 585-765-9330 ⏐monroe-electronics.com...
- Page 2 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 accor- dance with the foregoing, Monroe Electronics shall not be liable for any other damages, either direct or consequential.
- Page 3 Section 2 ..General Information Section 3 ......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 P/N 0340097 Rev: 071006...
- Page 4 Section 1 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 picofarads Plate self-discharge: Less than 10% of set voltage within 5 minutes below 50% RH at 25°C POWER SUPPLY: ±7500 volts maximum output;...
- Page 5 Section 2 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 6 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”. Monroe Electronics, Inc. does not supply copies of standards. Copies of the standard are available from: EOS/ESD Association, Inc. 7902 Turin Rd.
- Page 7 Section 3 OPERATION BASIC OPERATION - DISCHARGE MODE: 1. 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. 2.
- Page 8 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.
- Page 9 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. Factory service is advised.
- Page 10 0 to 1000 volts with 1-volt increments. This option is available either factory installed at the time of purchase or as a factory installed aftermarket upgrade to the basic Model 268A-1 VARIABLE TIMER OPTION OPERATING INSTRUCTIONS 1. Power unit on.
- Page 11 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 meas- ured.
- Page 12 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 model for high-humidity areas where CPM...
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