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Summary of Contents for Monroe Electronics 257D
- Page 1 Operators’ Manual Monroe Electronics, Inc. Model 257D Portable Electrostatic Fieldmeter P/N 0340176 257D/100 110309...
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Page 2: Table Of Contents
Geometry ....................... Page 7 Cables......................Page 8 Purging......................Page 8 Cleaning......................Page 9 FIELDMETER REFERENCES……………….SECTION 7........PAGE 10 WARRANTY AND REPAIR INFORMATION ………………......PAGE 11 Copyright© 2000 Monroe Electronics, Inc. Printed in USA Specifications and procedures subject to change without notice... -
Page 3: Specifications
Section 1 SPECIFICATIONS: Features: Battery or line operation Two ranges: 2 kV/cm and 20 kV/cm Remote probe for easy monitoring of hard-to-reach locations. Chopper stabilized, fed-back design for accurate measurements in ionized environments Recorder output for unattended monitoring Specifications: 2 kV/cm and 20 kV/cm Ranges:... -
Page 4: General Information
The carrying case has storage space for the probe, manual and accessories. Applications: One major application of the Model 257D is the monitoring of electrostatic charge accumulation. As charge increases on the surface of a material, the electrostatic field in the vicinity also increases proportionately. -
Page 5: Installation
B. Power Line Operation: An AC power adapter is supplied with each Model 257D. When the adapter is plugged into the receptacle on the rear of the instrument and an appropriate power source, the instrument will resort to line operation and the battery will automatically be charged as necessary. -
Page 6: Operation
Section 4 OPERATION The POWER, BACKLIGHT and RANGE switches on the front panel are push/push toggles and need to be depressed for at least a half second for the unit to respond. The TEST switch is a momentary. Pressing the POWER switch once turns power ON and pressing a second time turns power OFF. -
Page 7: Maintenance
Calibration: Calibration is not a user function and is beyond the scope of this manual. Calibration information is available from the factory. Monroe Electronics recommends annual calibration and/or when the instrument is damaged or repaired or where called for more often by contract. We offer repair and... -
Page 8: Probe Information
With some possible exceptions, probes intended for use with the Model 257D will be stamped with the digit “5” to indicate that the sensitivity is 20 kV/cm. Probes are standardized at the factory in a uniform electric field between two relatively large metal plates. -
Page 9: Geometry
mounted by means of two threaded inserts installed in the back plate. Please refer to outline drawing Figure 6-1 for location. Care must be exercised when selecting screw length. The tapped holes in the inserts are blind holes. They will accommodate five full #4-40 threads. -
Page 10: Cables
E. Cables: Probes are normally equipped with 10 foot cables and subminiature D connectors which mate with a connector recessed in the back panel of the instrument. Extension cables are available in lengths up to 1000 feet – the maximum length permissible. These extension cables may be ordered in any length (up to 1000 feet) by part number 1036/12-nn, where nn is the length in feet. -
Page 12: Fieldmeter References
FIELD OF FLAT SURFACES WITH ELECTROSTATIC FIELDMETERS" Presented at the ELECTRO-STATICS SOCIETY OF AMERICA CONFERENCE ON ELECTRO-STATICS, June 20-22, 1984. LT-19 ¤ WILLIAM E. VOSTEEN, Monroe Electronics, Inc., "A REVIEW OF CURRENT ELECTROSTATIC MEASUREMENT TECHNIQUES AND THEIR LIMITATIONS" Presented at the ELECTRICAL OVERSTRESS EXPOSITION, April 24-26,1984. -
Page 13: Warranty And Repair Information
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.
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