Prostat PGA-710, How To Measure Manual

Page 1: ...PGA 710 Autoanalysis System How To Measure Guide For PGA 710 Autoanalysis System Only Currently only available in English Japanese Last updated January 2011 ...

Page 2: ...y 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 PROSTAT is the registered trademark of PROSTAT Corporation ...

Page 3: ...ge 4 III Measure Body Voltage Generation 11 IV Instrument Test Setup for Decay 21 V Basic of Voltage Decay Analysis 22 VI Understanding Ionization Measurement Objectives 24 VII Offset Voltage Decay Time Measurement Procedures 25 VIII Understanding Ionization Measurement Objectives 27 IX Analyzing Decay Time Data Generating Reports 29 X Assembled Decay Charts 32 ...

Page 4: ... process based on the device s Human Body Model HBM damage threshold It will estimate the range of probable body voltage of most personnel while wearing the test footwear on the floor surface in question under specific temperature and relative humidity conditions In effect using the following procedure with the PGA 710 Autoanalysis system calculates and reports the probability of personnel equalin...

Page 5: ...ified tolerances and output voltages 2 volts or less may be used with the PROSTAT PGA 710 Autoanalysis System Confirm that the measurement instrument s maximum output voltage does not exceed 2 0 volts and that connections are compatible before using other instruments with the PGA 710 If there is any doubt about instrument compatibility contact PROSTAT before connecting the instrument as damage inc...

Page 6: ...to the PFM 711A Field Meter and the other end into the PGA 710 Autoanalyzer See Figure 3 below 5 Connect the PGA 710 to the Computer Install the supplied USB output cable between the PGA 710 Autoanalyzer receptacle and your computer s USB port This allows data flow from the PGA 710 into the Autoanalysis System Application software 6 Energize instruments computer Turn ON the field meter computer an...

Page 7: ...t window you may enter the number of walking step cycles you plan to conduct as in Figure 6 Twenty is typical but you may enter any number suitable to your needs Press to continue 10 Enter Technician Affiliation and Material information and press to continue 11 Enter address and test area information and click Finish to complete Session Wizard Figure 5 Start a new session Figure 6 Enter number of ...

Page 8: ...hout data in the system Test Information Status is Incomplete 13 Select background line colors and temperature type o C o F or both Change colors or include reference lines using the Document drop down Appearance Options menu Figure 9 New Test Screen Figure 10 Appearance Window Changes Backgroundand Selected Display Elements ...

Page 9: ... system proceed as follows a Remove the analog cable from the Autoanalyzer and insert the supplied shorting shunt Confirm the unit is energized and connected to the computer b Press Green right arrow in the Chart Control section or F5 to start the Preview data trace c If using a black background a Lime Green trace will appear in the screen window at approximately zero d Press the Black Square or F...

Page 10: ...Temperature and Relative Humidity a Press the Green Preview Arrow F5 to start the Preview Trace then Voltage Auto Balance double vertical arrows F11 This will provide a detailed view of the zero reference b If the zero reference is greater than 0 2 Volts zero the System as follows Figure 13 Opening the Current Measures window for detailed data display Figure 14 Press Voltage Auto Balance button of...

Page 11: ...to adjust the signal trace to your display needs Figure 15 Resetting Autoanalysis System Zero reference INFORMATION NOTE The PGA 710 Autoanalysis System is a precision instrument Depending on the environment and while rare the System s zero reference may be affected by high levels of extraneous transmitted energy or noise i e EMI RFI All units are easily zeroed as described above unless influenced...

Page 12: ...s the walking data with some input from the operator The Walking Step The operator holds a metal wand in their hand during the walking cycles The wand is connected to the Charge Plate Monitor accessory installed on the PROSTAT PFM 711A Field Meter 1 Once positioned press the Green Right Arrow F5 to start data Preview conduct one or two walking patterns to ascertain body voltage range The following...

Page 13: ...e recorded data a You may press the Time Scale Auto Fit button or F12 to display the entire test series on the screen Figure 19 b If desired add lines and labels In the Figure 19 additional voltage lines and labels were added at 100 volts using Document Voltage Custom Options menus c Notice that the Test Information section displays the Type of test and its status Figure 18 Preview Body Voltage Ge...

Page 14: ...rol window will open The Editing a Select Trim Left Position the cursor on the trace Everything LEFT of the cursor will not be used in the analysis b Select Trim Right Position the cursor on the trace Everything RIGHT of the cursor will not be used in the analysis Figure 20 Trim the trace of data to be ignored NOTE Trimming will exclude data from the analysis process Trimming will not remove data ...

Page 15: ...ick Adjust and Release to complete the analysis b If the system does not agree the number of possible voltage peaks found may appear in the Results window c You may click on a proposed Results option if there is more than one to initiate the analysis Or you may enter a different number of Step Cycles press Enter and then Analyze to restart the analytical process d If the system cannot resolve the ...

Page 16: ...k to the analysis select the appropriate button Add Min or Add Max and position the cursor on the peak you wish to add 7 Once you are generally satisfied with the number peaks click Release in the Edit Control window Figure 25 to initiate detailed analysis of the data Once the data is released the program will automatically calculate Figure 27 a 3 Sigma range Average plus and minus 3 times the sta...

Page 17: ...ion Red Lines Indicate Walking Body Voltage Average 3 Standard Deviations 8 Once the basic calculations are completed a detailed report may be generated From the Document drop down menu Figure 28 select Report View a This opens the Report window where type and format may be selected b If the Body Voltage Test is selected a full size 8 5 x 11 0 inch landscape chart will be generated for printing or...

Page 18: ...29 Full Size Chart with Session Wizard Information Figure 30 Full Size Chart with Session Wizard Information c Selecting the Body Voltage Analysis Abs report will generate graphs where their slopes will be calculated using absolute values of the data Figure 30 ...

Page 19: ...re slopes will be calculated using values and polarities of the recorded data Figure 31 e The first page of the report includes the graphic recording of the data session information and general calculations Graph of Recorded Data 3 Sigma Ranges Highlighted Descriptive Information that was input to the Session Wizard General Calculations and Footer Information which includes File Name Time and Date...

Page 20: ...ons Calculated Probability of Equaling or Exceeding a given Body Voltage of Personnel while Standing and Functioning at Workstations Based on Average Minimum Peaks at 6 Step Pause 3 Standard Deviations Calculated Probability of Equaling or Exceeding a given Peak Body Voltage of Personnel while Walking Based on Average Maximum Peaks 3 Standard Deviations Figure 33 Second Page of Body Voltage Genera...

Page 21: ...r CPM which is positioned in the ion field or air flow The time required in seconds for the ionizer to reduce that voltage to a predetermined level is measured Decay analysis may also be used to evaluate various packaging materials and configurations One may wish to measure how quickly a charge is dissipated from a person when grounded or when wearing ESD footwear and stepping onto a floor surface...

Page 22: ...g your warranty input to the Autoanalyzer may not exceed 2 0 volts without specific adjustments and recommendations from PROSTAT Confirm proper non PROSTAT instrument output voltages before connecting to and energizing the system 4 Use the Prostat PCS 730 1 kV Charging Source for applying voltage to the charge plate for decay testing Be sure the PCS 730 is grounded for proper operation CAUTION To ...

Page 23: ...eriod a The Reset Voltage starts the timing calculation period b Cutoff Voltage ends the timing calculation period 2 The second Decay Window offers two means to designate Reset and Cutoff Voltages a Standard Reset and Cutoff Voltages are See Figure 39 1 000 Volts 100 Volts 1 000 Volts 50 Volts 1 000 Volts 10 Volts b Checking the Custom Box allow entry of any two pair of voltages necessary for the ...

Page 24: ... Once a new file is opened decay test data is recorded using the same chart controls described above for recording voltage generation Short Cut Keys are also used for this function F5 Preview Starts chart display of voltage and measurement levels F6 Record Begins data capture of all measurement levels F7 Pause Stops and Starts Chart recording and playback F8 Stop Ends Preview Recording or Playback...

Page 25: ...l number of positive and negative ions are generated Once the ions are generated within the bench top system a fan blows the ions out of the box into the work area as shown in Figure 44 1 Diagram courtesy of Arnold Steinman Technical Director Ion Systems Inc n n n n n n n n n n n n n 7 Neutrons 7 Protons 7 Electrons n n n n n n n n n n n n n n n 1 Electron Dislodged 2 Electron Captured 3 Electron ...

Page 26: ...ptable decay time Thus two measurements of an ionizer device or system are required Offset Voltage in electrostatic volts and Decay Time in seconds VII Offset Voltage Decay Time Measurement Procedures The following describes decay and offset voltage measurements of bench top ionizers Room systems and compressed air or gas devices may be measured in a similar manner but may require use of a six inc...

Page 27: ...PM at the point that offset voltage is to be measured Typically this is approximately 15 to 40 inches from the outlet of the ionizer depending on process and work requirements Worksurface Ionizer 12 40 Inches Auditing Ionizer Offset Voltage Balance Ground Portable CPM Ground Zero CPM 1 Volt Increments Preferred Place in Air Path 12 40 or at Desired Working Point Insure No Grounded Objects in Air P...

Page 28: ...ion decay time indicates the number of seconds required for a voltage on a charged plate to dissipate to a defined level when in the presence of ionized air Typically decay time is measured from 1 000 volts to less than 100 50 or 10 volts during audits of ionizers Other requirements may be dictated by the company s ESD program Decay time is measured at the same distance from the ionizer outlet or ...

Page 29: ... Figure 50 and place it into the ionized air stream 4 Allow the test voltage to dissipate to its minimum level 5 Repeat the test cycles several times with both positive and negative test voltages 6 A minimum of three to six 3 to 6 test cycles should be recorded for each positive and negative test voltages for a total of 6 to 12 test cycles per bench top ionizer audit Temperature Relative Humidity ...

Page 30: ...cle time starts at 1 000 volts and ends at 10 volts as shown in Figure 53 Once the Decay Parameters are set click Analyze to begin the decay analysis process This will insert vertical start and stop time lines in the chart area indicating those test cycles that have the desired parameters in this case 1 000 to 10 volts If the cycle does not meet these parameters no vertical start stop time lines w...

Page 31: ...he Report View Toggle Button as shown in Figure 55 Note that the Report View Toggle Button allows the view to shift between Strip Chart and Report Views In Report View one may select a full size chart that is produced in a landscape mode or a detailed report produced in the standard portrait mode The decay reports and charts may be generated in a standard format as shown in Figure 57 or in a uniqu...

Page 32: ...ries In effect the test set is taken apart by each test cycle and reassembled in sequence The Positive cycles are compared to the Negative cycles as shown in Figure 58 For example the total decay time of all Positive cycles was slightly more than 4 8 seconds while the total of all Negative cycles is approximately 5 7 seconds Rev PGA 710 1 2011 Format modification 02 11 2005 NOTE For additional inf...

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Page 35: ...Copyright 2001 2011 Prostat Corporation Printed in U S A 1072 Tower Lane Bensenville IL 60106 USA www prostatcorp com ...