Monroe Electronics 268A User Manual

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: [phone] ⏐monroe-electronics.com

WARRANTY

Monroe Electronics, Inc., warrants to the Owners, this instrument to be free from defects in
material and workmanship for a period of two years after shipment from the factory. This
warranty is applicable to the original purchaser only.
Liability under this warranty is limited to service, adjustment or replacement of defective parts
(other than tubes, fuses or batteries) on any instrument or sub-assembly returned to the factory
for this purpose, transportation prepaid.
This warranty does not apply to instruments or sub-assemblies subjected to abuse, abnormal
operating conditions, or unauthorized repair or modification.
Since Monroe Electronics, Inc. has no control over conditions of use, no warranty is made or
implied as to the suitability of our product for the customer’s intended use.
THIS WARRANTY SET FORTH IN THIS ARTICLE IS EXCLUSIVE AND IN LIEU OF ALL
OTHER WARRANTIES AND REPRESENTATIONS, EXPRESS, IMPLIED OR STATUTORY
INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS. Except for obligations expressly undertaken by Monroe Electronics, in this
Warranty, Owner hereby waives and releases all rights, claims and remedies with respect to any
and all guarantees, express, implied, or statutory (including without limitation, the implied
warranties of merchantability and fitness), and including but without being limited to any obligation
of Monroe Electronics with respect to incidental or consequential damages, or damages for loss
of use. No agreement or understanding varying or extending the warranty will be binding upon
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.

RETURN POLICIES AND PROCEDURES

FACTORY REPAIR:

Return authorization is required for factory repair work. Material being returned to the factory for
repair must have a Return Material Authorization number. To obtain an RMA number, call 585­765-2254 and ask for Customer Service.
Material returned to the factory for warranty repair must be accompanied by a copy of a dated
invoice or bill of sale, which serves as a proof of purchase for the material.
Repairs will be returned promptly. Repairs are normally returned to the customer by UPS within
ten working days after receipt by Monroe Electronics, Inc. Return (to the customer) UPS charges
will be paid by Monroe Electronics on warranty work. Return (to the customer) UPS charges will
be prepaid and added to invoice for out-of-warranty repair work.

EXPEDITED FACTORY REPAIR:

All material returned to the factory by air or by an overnight service will be expedited. Expedited
factory repairs will be returned to the customer by the same mode of transportation by which the
material was returned to the factory for repair (i.e., material returned to the factory by an overnight
service will be returned to the customer by an overnight service).
NOTE: Return (to the customer) transportation expenses for expedited factory repairs will always
be at the expense of the customer despite the warranty status of the equipment.

FACTORY REPAIRS TO MODIFIED EQUIPMENT:

Material returned to the factory for repair that has been modified will be not tested unless the
nature and purpose of the modification is understood by us and does not render the equipment
untestable at our repair facility. We will reserve the right to deny service to any modified
equipment returned to the factory for repair regardless of the warranty status of the equipment.

TABLE OF CONTENTS

Warranty

Section 1 ...................Specifications

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

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; ±1000 volts/±5000 volts charging of isolated
plate available, adjustable from <±1000 to >±5000 volts

ELECTROSTATIC FIELDMETER:

RANGE: 0 to ±7500 volts; 0 to ±2000 volts—switch selectable
ACCURACY: Better than 2%
DRIFT: Less than 0.4% per hour non-cumulative after 10 minutes

stabilization, typical
SPEED OF RESPONSE: Less than 100ms for 10% to 90% of full scale either

range
OUTPUT: Divide input by 1000, impedance 100Ω

TIMER:

Full scale 999.9 sec. (>16 min.), 0.1 sec. Resolution

POWER REQUIREMENTS:

117 or 220 volts ±10% (factory preset), 50/60 Hz, 5 watts

SIZE AND WEIGHT:

Height 6¾”, Width 6¾”, Depth 9½”; 5.5 lbs.
(17 x 17 x 24 cm, 2.3kg)