PFM-711A ELECTROSTATIC FIELD METER
Contents
1. Adjusting PFM 711A Field Meter Front Panel Zero to Range The front Black panel Zero knob r16 adjustment range is less than a full turn Occasionally it may need to be adjusted to its midpoint due to environmental temperature variations a b Rev B November 2011 Select the kV inch range using the three position Range Power operation switch s1 Turn the Black Panel knob r16 fully counter clockwise Using a small blade screwdriver adjust the Internal calibration adjustment r27 located next to Zero Knob until the display reads 1 60 kV inch Rotate the Black Panel Zero Knob r16 fully clockwise The display should indicate approxi mately 1 60 0 10 kV inch Rotate the Black Panel Zero Knob r16 to mid position approximately turn until the display indicates 0 00 This completes the Black Panel Zero Knob r16 adjustment PFM 711 Electrostatic Field Meter PFM 711A Electrostatic Fieldmeter Specifications Meter Hold Display Output Range Range Lights Accuracy amp Environment Response Controls Grounding Power Dimension Weight 10 3 1 2 digit Liquid Crystal Display with 0 4 digit height Automatic polarity and LOW BATTERY indicators Analog signal output and 30 inch two conductor cable provided 10 0 kV meter reading equals 1 0 volts output High Range 0 V to 19 99 kV least significant digit indicates tens of volts at one inch distance Low Ra2. V General Operation A Field Measurements using the PFM 711A Field Meter 1 Before operating the PFM 711A the operator should select and wear a fully functional wrist strap that is properly grounded Rev B November 2011 PFM 711A Electrostatic Field Meter OPERATIONAL REQUIREMENT Case of PFM 711A Field Meter MUST be grounded for proper operation 2 With the operator s fingers contacting the grounding snap on the back of the unit slide the three position kV inch OFF V inch RANGE POWER switch s1 to the kV inch position a Confirm that the instrument s display is activated and that the battery low indication BATT is not displayed If low battery indication is displayed replace the battery b Insure the HOLD feature is OFF Turn the HOLD feature OFF by pushing the SAMPLE HOLD s2 control button once c Hold the unit away from surfaces and objects and rotate the Black Panel ZERO knob r16 until the display indicates 0 00 3 Position the front sensor of the PFM 711A Field Meter approximately one inch from the sur face or object being measured Move the instrument toward or away from the surface until the RED Bulls Eye is focused on the test surface CAUTION Do not shine the RED Bull s Eye Ranging lights into yours or anyone else s eyes 4 Once the instrument is properly positioned the PFM 711A will indicate the electrostatic field measured on its display If desired push
3. the SAMPLE HOLD button s2 once to lock the indica tion on the display The HOLD indication will also appear on the instrument display 5 For very low voltage measurements repeat the procedure with the PFM 711A in its low range Slide the RANGE POWER switch s1 to V inch position Re zero the instrument and repeat the meter positioning and measurement procedures in points 2 4 above 6 PFM 711A Controls The PFM 711A has two switches and a rotary knob A three position slide switch s1 provides Range Selections and ON OFF control A rotary ZERO adjust control r16 is also provided The Rev B November 2011 7 PFM 711 Electrostatic Field Meter SAMPLE HOLD push button switch has two positions depressing the button latches it into the lower Sample position Pressing it again releases it into its upper HOLD position The ZERO knob may be turned to the left or right to change the zero setting of the display The unit must be operated while grounded 7 Turning The PFM 711A Field Meter ON and OFF Push the slide switch RANGE POWER s1 to its upper position towards the display to select kV inch The display will come ON a decimal point will be displayed and the meter will mea sure up to 19 99kV at one inch in 10 volt increments Placing the slide switch in the lower posi tion will select V inch There will be no decimal point in the display and the meter will measure up to 1999 volts at one inch in one volt increments Moving the sw
4. ELECTROSTATIC FIELD METER PFM 711A User Manual FJ PROSTAT Table of Contents PROSTAT PFM 711A ELECTROSTATIC FIELD METER fea D TS CS CS CCS General Operation 5 Maintenance amp User Adjustment EM NN General Specifications Copyright O 2011 by Prostat Corporation All rights reserved Printed in the United States of America No part of this manual may be used or reproduced in any manner whatsoever without written permission For information contact Prostat Corporation 1072 Tower Lane Bensenville IL 60106 USA Prostat is the registered trademark of Prostat Corporation PFM 711 Electrostatic Field Meter I Introduction The PFM 711A is an accurate compact electrostatic fieldmeter used for locating and measuring static charge potentials Other types of electrostatic measurements may also be made usingthe PFM 711A and its accessories A The PFM 711A features SAMPLE and HOLD measurement modes that allow measurements to be made in places that would be difficult to reach or see with other instruments B Range switching is provided with the PFM 711A In V inch mode the digital display covers the range of 0 1999 volts in one volt increments In kV inch mode it covers the range of 10 volts to 20kV in ten volt increments 1 An analog output jack provides a 1 volt output corresponding to 10kV which is independent of the range selected and meter indication 2 The circuitry is a digital electronic chopper desi
5. ance amp User Adjustment A The PFM 711A is factory calibrated and other than battery replacement external cleaning and oc casional adjustment of the front panel Zero knob range position general user maintenance is not required The case has been sealed and BREAKING THE SEALS WILL VOID THE WARRANTY If for any reason you believe the meter is not working correctly contact Prostat Corporation for assis tance USER CAUTION Other than battery replacement amp front panel zero range adjustment there are no user serviceable parts Any unauthorized service will void the warranty and result in additional repair charges 8 Rev B November 2011 PFM 711A Electrostatic Field Meter 1 Cleaning the PFM 711A Case amp Display Clean the meter case and display lens with a dry soft non scratching cloth a b DO NOT USE SOLUTION TO WET THE CASE DISPLAY OR CONTROLS Carefully wipe the case and display until dust and dirt are removed The cloth should be barely damp DO NOT allow the instrument to become wet with the cleaning solution DO NOT allow cleaning solution to enter the unit through control or circuit zero adjustment openings Should the unit become damaged with cleaning solutions the USER CAUTION In rare cases cleaning the PFM 711A case and display with a slightly dampened cloth may be required Should this be required use a very weak solution of liquid soap and water warranty is voided 2
6. gn and subsequently the instrument is useful for making electrostatic field measurements in areas where ionized air is present 3 For accurate repeatable performance the PFM 711A must be grounded during normal operations Il Cautions amp Warnings A Do not point the PFM 711A Field Meter Ranging Lights into anyone s eyes CAUTION Do not point ranging lights into anyone s eyes B Do not store or use instruments in damp environments C The PFM 711A Field Meter case must be grounded for proper operation CAUTION Ground Case of PFM 711A Field Meter for proper operation D Turn OFF all instruments when in storage or transit Remove batteries when instruments are in tended for long term storage i e six months or longer Ill Equipment Inspection amp Initial Preparation for use A PFM 711A Field Meter Equipment and Accessories e One PFM 711A Field Meter e One 9 Volt DC battery e One 36 inch analog output test cable equipped with two male banana plug 4 Rev B November 2011 PFM 711A Electrostatic Field Meter INTERNAL ZERO ADJUSTMENT r27 DIGITAL DISPLAY ANALOG OUTPUT kV inch kV inch Sample OFF PANEL ZERO r16 INTERNAL GAIN RANGE POWER SWITCH s1 ARRI RE ADJUSTMENT r10 PE Eure dur SAMPLE HOLD BUTTON s2 B PFM 711A Field Meter Preparation for use 1 Install 9 Volt battery provided by sliding battery com partment open and firmly snapping batter
7. itch to its center position will turn the meter OFF 8 Zero The PFM 711A Field Meter Ground the case by wearing a functional wrist strap that is properly grounded Turn the meter on by selecting the desired range Press the SAMPLE HOLD button down so that it latches in the lower or SAMPLE position and HOLD is not indicated in the meter display Adjust the dis play to zero 0 volts by rotating the ZERO control IMPORTANT The PFM 711A meter case is conductive It provides the ground reference for its measuring circuit For accurate measurements it is necessary that the person holding the meter be properly grounded or the meter has a ground connection made to the metal snap on the case 9 Take An Electrostatic Field Measurement with the PFM711 A Field Meter Turn the meter ON to the desired range Hold the front of the meter approximately one inch from the surface to be measured Adjust the distance from the test surface until the RED rang ing lights form a Bull s Eye Allow the instrument to stabilize Record the Measurement 10 HOLD A PFM 711A Measurement With the meter in the measurement position described above press the SAMPLE HOLD but ton so that it latches in the upper or hold position This will freeze the reading on the display allowing the meter to be moved to a position where it may be more easily read and document ed When the meter is in the HOLD position the word HOLD will appear In the display VI Mainten
8. nge 0 V to 1 999 V least significant digit indicates 1 volt at one inch dis tance Measures higher voltages at greater distances e g at two inches double indicated voltage at four inches multiply indicated voltage by four Red Bulls Eye at one inch distance 2 at ambient conditions 23 C and 30 Rh 5 at 0 50 C and 0 85 Rh non condensing Accuracy unaffected by the presence of air ionization Digital display updates three 3 times per second Analog Output Time Constant Either Range 0 1 sec Display Time Constants High Range 0 2 sec Low Range 2 0 sec Three position slide switch kV inch OFF V inch Sample HOLD push button and ZERO adjust knob Meter circuit grounded through the conductive case and 10 mm snap fastener mounted on back of case 9 volt DC alkaline battery Battery life minimum 40 hours 2 4 wide x 4 2 long x 9 deep 1 3 deep with zero knob and snap fastener 5 ounces with battery Rev B November 2011 Specifications are subject to change without notice All Prostat trademarks and trade names are the property of Prostat Corporation All other trademarks and trade names are the property of their respective companies CARRIED BY PROFESSIONALS B PROFESSIONAL STATIC CONTROL PRODUCTS Prostat Corporation Corporate Headquarters e 1072 Tower Lane Bensenville IL 60106 630 238 8883 Fax 630 238 9717 e 1 855 STATIC1 e www prostatcorp com
9. way RANGE POWER Switch s1 to the V inch position Allow the display to settle to a stable indication this should require four to eight seconds Point the unit away from surfaces and objects and rotate the Black Panel ZERO knob r16 until the display indicates 000 Experiment with the meter by measuring the surface of a charged material OPERATIONAL NOTE The case of PFM 711A Field Meter is conductive and part of the instrument s grounding circuit If one holds the meter in one hand and attempts to measure voltage on the other hand no reading can be obtained regardless of body voltage C Confirming PFM 711A Field Meter Analog Function 1 Connect the analog cable to the PFM 711A kV inch output jack 2 Connect the RED output banana plug to the Positive input of an X Y plotter or digital Multi meter DMM 3 Connect the BLACK output banana plug to the Negative input of the X Y plotter or Multime ter DMM When the PFM 711A displays 1 000 volts the analog should be approximately 0 1 volts IV Application The PFM 711A Field Meter is an accurate electrostatic field measuring device Used by itself the PFM 711A will measure electrostatic fields emanating from virtually any flat surface or object In V inch mode the digital display covers the range of 0 1999 volts in one volt increments In kV inch mode it covers the range of 10 volts to 20kV in ten volt increments at one inch distance from the charged surface
10. y terminals to the appropriate connectors Battery can only be connected in one way Carefully reclose the battery compartment 2 Before operating the PFM 711A the operator should select and wear a wrist strap that is confirmed func tional and properly grounded OPERATIONAL REQUIREMENT Case of PFM 711A Field Meter MUST be grounded for proper operation 3 With the operator s fingers contacting the grounding snap on the back of the unit slide the three position RANGE POWER Switch s1 kV inch OFF V inch to the kV inch position a Confirm that the instrument s display is activated and that the battery low indication BATT is not displayed If low battery is displayed replace the battery Rev B November 2011 5 PFM 711 Electrostatic Field Meter Cycle the SAMPLE HOLD button s2 by pushing it a few times note the HOLD indication on the meter s display Release SAMPLE HOLD so that the meter is free to measure fields Hold a flat sheet of material in front of the meter s sensing plate to confirm operation of the red ranging Bull s Eye light system A circle with a spot in the middle should clearly ap pear on the material surface when held one inch from the meter s sensing plate Point the unit away from surfaces and objects and rotate the Black Panel r16 ZERO knob until the display indicates 0 00 Experiment with the meter by measuring the surface of a charged material Slide the three
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