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8

Rev. C  / January 2012

PRS-812 Resistance Meter

CAUTION

Storage or use of this instrument in high humidity, damp or wet conditions  

may cause damage to the instrument’s electronic circuits, effect performance 

and can increase the possibility of personnel shock or arc discharge.

 

F.  Do not use the PRS-812 in combustible or explosive environments

WARNING

Improper handling and use of energized circuits may cause arc discharge,  

which in turn may cause the ignition of combustible materials or fumes.  

Do not use exposed energized circuits in flammable areas.

 

G.  Do not attempt to measure energized circuits with the PRS-812

 

H.  Do not use the PRS-812 if it becomes damaged in any way

 

I.  Only Prostat trained instrument personnel should attempt to service or repair the PRS-812

 

J.  Other Safety & Operating Considerations

1.  This manual displays cautions and warnings alerting the user to hazardous operation and ser-

vicing conditions. 

CAUTION

 or 

WARNING

 headings throughout this publication flag this infor-

mation, where appropriate.  Follow all caution and warning instructions at all times.

 

2.  The PRS-812 is a precision instrument and should be operated by experienced personnel famil-

iar with the use and handling of devices containing power supplies. 

 

 

CAUTION

The PRS-812 Contains Electrostatic Discharge Sensitive (ESDS) components 

and includes precision alignment of circuit elements. Only Prostat trained and 

ESD Qualified instrument repair personnel should perform service.

 

3.  The PRS-812 contains Electrostatic Discharge Sensitive (ESDS) components. Qualified personnel 

should service it only at ESD Controlled workstations. Do not attempt to dismantle the PRS-812 

Содержание PRS-801

Страница 1: ...PRS 812 RESISTANCE METER User Manual ...

Страница 2: ......

Страница 3: ...aintenance 31 VIII Warranty Information 32 General Specifications 34 Instrument Controls 35 Table of Contents Copyright 2012 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 Prosta...

Страница 4: ...tolerance are obtained The final averaged data is displayed as the resis tance measurement Typically measurements at less than 1 ohm are within 5 of tolerance and those between 1 0 and 1 0x1012 ohms are within 0 5 of laboratory references While quite sophisticated in design the PRS 812 Resistance Meter is easy to use and extremely helpful in making accurate ESD auditing measurements or general res...

Страница 5: ...l audit measurements up to 1 0x1012 ohms 3 One heavy duty black Bulldog clip PRS 801BC 4 Two Metal Alligator Clips PSI 870MAC 5 One Audit Test Bed PTB 915 6 One calibration shunt for low range adjustment PRS 801CC Optional accessories are available for the PRS 812 Resistance Meter Visit www prostatcorp com for additional information C PRS 812 Basic Description Functions The PRS 812 Resistance Mete...

Страница 6: ...ws 10V 0 1 TO 1 0E 04Ω 0 1Ω 10KΩ 10V 1 0E 04 TO 1 0E 06Ω 10KΩ 1MΩ 100V 1 0E 06 TO 2 0E 12Ω 1MΩ 200TΩ See Note Below 2 MANUAL RESISTANCE RANGES IN MAN 0 1Ω TO 2 0E 12Ω as follows 10V 0 1 TO 1 0E 05Ω 0 1Ω 100KΩ 10V 1 0E 03 TO 1 0E 09Ω 1KΩ 1GΩ 100V 2 0E 05 TO 2 0E 12Ω 200KΩ 200TΩ See Note Below 3 AUTO MANUAL Same as AUTOMATIC RESISTANCE RANGES IN AUTO MANUAL 0 1Ω TO 2 0E 12Ω as follows 10V 0 1 TO 1 0...

Страница 7: ... instrument will provide access to the memory register calculate and display Minimum Maximum and Average of all measurements in the instrument s memory whenever RECALL is selected II Cautions Warnings As with any electrical device use proper safety precautions and safe measurement procedures to avoid personnel shock and arc discharge A The PRS 812 Resistance Meter is battery operated and delivers ...

Страница 8: ...ld attempt to service or repair the PRS 812 J Other Safety Operating Considerations 1 This manual displays cautions and warnings alerting the user to hazardous operation and ser vicing conditions CAUTION or WARNING headings throughout this publication flag this infor mation where appropriate Follow all caution and warning instructions at all times 2 The PRS 812 is a precision instrument and should...

Страница 9: ...nditions 7 If the unit is stored in a cold environment allow it to stabilize at room temperature before powering up the unit This will prevent damage due to condensation that may accumulate on the instrument s circuit boards III Controls Connections Indicators Before operating the PRS 812 instrument become familiar with each control and display function A thorough understanding of the instrument s...

Страница 10: ...ines electrification period in seconds SEC using the displayed timer in the center of the LCD 5 AUTO MANUAL displays data in exponential format 1 0EXX 6 AUTO MANUAL displays data in Ω KΩ MΩ GΩ and TΩ In AUTO MANUAL the operator may select the initial resistance range in decade increments Once set the PRS 812 starts the measurement process from the preset resistance decade rather than re zeroing it...

Страница 11: ...ate and sequentially display Minimum MIN Maximum MAX and Average AVG of data stored in the Memory Register If memory is ON and register contains stored data pressing RECALL will provide the following information First Press RECALL Provides access to data in Memory NOTE MEM XX Flashes in LCD indicating number of data points in the register and the last measurement is displayed Pressing DOWN and UP ...

Страница 12: ...card the displayed data point Other data in Memory Register remains intact and indexes down one space to replace the discarded data point d When in any operation mode and HOLD is not displayed pressing CLEAR will erase all data stored in the Memory Register Pressing OFF will disble the REC mode and the instrument will be de energized When powered up again the REC mode will remain disabled until RE...

Страница 13: ...strument in MANUAL mode When AUTO and MANUAL are ON indicates instrument is in AUTO MANUAL mode Analog Scale X100 Indicator The one decade analog scale elements darken to indicate measurement in teger X1 X10 or X100 darken to indicate the scale multiplier Combine the Analog indicators with Ω KΩ MΩ GΩ and TΩ symbols to obtain an analog measurement MEM 00 Provides the number of data points stored in...

Страница 14: ...icates that the Memory Register is ON and is Recording data each time the RESET button is depressed after a TEST measurement Ω Ohms Indicates measurement between 0 1 and 999 ohms KΩ Indicates measurements from 1 000 1 0x103 to 990 000 9 9x105 ohms MΩ Indicates measurements from 1 000 000 1 0x106 to 999 000 000 9 9x108 ohms GΩ Indicates measurements from 1 000 000 000 1 0x109 to 999 000 000 000 9 9...

Страница 15: ...lt in a diminished battery life measurement error and potential instrument damage that could void the warranty The battery caps on the instruments you have purchased are designed to fit snugly Please follow the di rections below for safe replacement of batteries A Slide battery bus switch to the OFF position see figure 3 B Carefully remove the battery cover from the instrument C Gently take the ba...

Страница 16: ...attery measures at or below 6 75 volts replace that battery If both batteries measure at or below 6 75 volts replace both batteries V Setup Calibration A Setting up the PRS 812 for low resistance range calibration 1 Position Battery Buss Cut Off switch to OFF position 2 To install batteries remove two Phillips locking screws and cover Attach two Long Life Alkaline 9V batteries to the battery conne...

Страница 17: ...w the instrument circuits to warm up for a few minutes approximately 2 3 minutes are sufficient prior to completing the calibration sequence 4 Press MODE once to shift display to ohms mode Ω 5 Press the Yellow RESET then the Gray CLEAR button within second The message CAL will be displayed in the LCD See Figure 8 6 Press the Yellow RESET button to complete low range 0 1 to 10 ohm calibration The C...

Страница 18: ...ng and using the PRS 812 for resis tance measurements 1 Slide Battery Buss Cut Off switch to ON 2 Press Red ON OFF button once to power up PRS 812 a Instrument performs circuit check and tests LED s LCD display and battery voltage b LCD displays GOOD if battery voltage suitable for instrument operation displays Lo if bat teries require replacement c Instrument ends startup sequence in default AUTO...

Страница 19: ...t to minimum 0 1Ω It is automatically adjusted in conjunction with the resistance characteristics of the materials under test based on 1 Test voltage and 2 Current flow b Test Voltage is reset to 10V and automatically increased in accordance with the following material resistance characteristics 1 10 Volts 0 1 to less than 1 0x104 ohms 0 1Ω 10KΩ 2 10 Volts 1 0x104 to less than 1 0x106 ohms 10KΩ 1M...

Страница 20: ...ly be terminated and the most recent aver aged result of eight 8 individual consecutive measurements will be displayed and held NOTE Several material measurements that vary greater than 15 to 20 percent of each other typically indicate inconsistencies in the material or test conditions f In rare cases when a stable measurement cannot be obtained the display will reset NOTE When several held measur...

Страница 21: ...ensure accuracy and repeatability Follow the recommendations below to obtain optimal performance from the PRS 812 1 Instrument handling and preparation a Do not drop or cause mechanical shock to your instrument b Store the instrument in a clean dry environment Do not expose the instrument to wet extremely hot or cold conditions c If the unit is stored in a cold environment allow it to stabilize at...

Страница 22: ...r damage to the terminal circuit board 2 The straight retractable sheathed banana plugs are intended for connection to measurement electrodes fixtures or clip accessories 3 The red lead should be installaed in the positive terminal and the black lead in the negative terminals 3 When making measurements in the manufacturing environment move the instrument and test leads away from power cables and h...

Страница 23: ...volts and applies initial voltage to material under test 3 Resets the ELECTRIFICATION PERIOD timer to 0 seconds then starts timer 4 During Measurement Test Cycle a Automatically adjusts RESISTANCE RANGE in accordance with material resistive characteris tics b Automatically adjusts TEST VOLTAGE in accordance with material resistive characteristics and industry standards c Automatically adjusts ELEC...

Страница 24: ...in Ohms press the Gray MODE button once 6 If REC is not displayed in the lower left corner of the Liquid Crystal Display LCD press Gray RECORD RECALL button once to display REC in LCD This activates the Memory Register en abling data storage 7 Press the Green TEST button to begin the AUTOMATIC measurement sequence The instru ment will automatically set the resistance range to 0 1 Ohms 1 0E 01 and ...

Страница 25: ...to Ohms Mode Measuring 958Ω in Auto Exponential Mode F Measurements from 1 0x104 to less than 1 0x106 ohms 1 When the resistance measurement is greater than 1 0x104 ohms test voltage will automatically be increased to 10 volts and the resistance range will be adjusted as necessary 2 A stable resistance measurement will be obtained within 2 0 to 4 0 seconds 3 Once a stable measurement is confirmed ...

Страница 26: ...cally shifts to 8 0 sec 1 0E 06 Ohms NOTE The PRS 812 can obtain an accurate resistance measurement within 2 5 seconds up to 1 0x1012 ohms depending on material characteristics An additional 5 0 seconds of electrification is applied in accordance with ESD Association S11 11 Surface Resistance Standard 3 Once a stable measurement is confirmed and displayed by the instrument HOLD will be ener gized ...

Страница 27: ...his range OL will be displayed J Resistance Measurements in MANUAL MODE of Operation To select MANUAL in either Exponential Mode 3 or Ohms Mode 4 Display use the FUNCTION MODE button to toggle through choices Manual is used for a variety of applications where one desires to override Automatic functions Measurement series where magnitude is in a defined decade and test voltage is fixed When an exte...

Страница 28: ...djust the measurement resistance range to the selected decade 3 Start the electrification period timer b If resistance is within the selected decade the measurement and the electrification time will be displayed continuously in the LCD c Pressing RESET will stop the Measurement Test Cycle and simultaneously 1 Turn Test Voltage power supply OFF 2 Save the displayed measurement in the Memory Registe...

Страница 29: ...minimum functions It is intended for applications where Multiple Measurements where magnitude is expected within a range of two or three de cades and test voltage must vary with actual resistance measurements When AUTOMATIC electrification period and Test Voltage control must be maintained to current industry and Automatic Mode settings This mode prevents the PRS 812 from resetting the Test Voltag...

Страница 30: ...plays and HOLDS final resistance measure ment test voltage order of magnitude LED analog scale multiplier and electrification time at end of electrification period L The Memory Register Data Logging and Calculation As previously described the PRS 812 Resistance System will acquire and store up to 80 measure ments or data points in its Memory Register when Record REC is activated Data is entered in...

Страница 31: ...2 0x1014 ohms are not included in displayed average AVG calculation AVG is the calculated average of all resis tance values less than 2 0x1014 ohms rounded to the first decimal point e 5th Press RECORD RECALL Returns PRS 812 System to normal operations NOTE If RECALL is not pressed a fifth time OOPS will be displayed in the LCD when TEST is next pressed To Clear OOPS press RESET The instrument wil...

Страница 32: ... such parts that it determines to be defective Any defective part must be returned to Prostat postage prepaid with proof of purchase date Warranty Exclusions THE FOREGOING EXPRESS WARRANTY IS MADE IN LIEU OF ALL OTHER PRODUCT WARRANTIES EXPRESS AND IMPLIED INCLUDING MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE WHICH ARE SPECIFICALLY DISCLAIMED The express warranty will not ap ply to defect...

Страница 33: ...aterials Authorization RMA number and should be packaged and shipped as described above and as directed by Prostat s customer service department 2 The following information must be included with the returned product a Description of the problem b Customer s Purchase Order Number Prostat s Materials Authorization RMA number c Name telephone number and fax number of individual contact who can provid...

Страница 34: ...nd TΩ Includes 19 segment analog scale 1 10 with 0 5 indication with x1 x10 x100 multipliers Number of Data Points in Memory 0 80 Automatic Electrification Time sec onds or Time required to Manually obtain steady state measurement Displays data HOLD BATTERY status MIN MAX AVG REC and Test Voltage 10 10 or 100 V LED Indicators 14 Color LED s from 103 to 1014 ohms Colors are RED GREEN YELLOW ORANGE ...

Страница 35: ... AUTO TABLE NOTES 1 AUTOMATIC RESISTANCE RANGES IN AUTO 0 1Ω TO 2 0E 12Ω as follows 10V 0 1 TO 1 0E 04Ω 0 1Ω 10KΩ 10V 1 0E 04 TO 1 0E 06Ω 10KΩ 1MΩ 100V 1 0E 06 TO 2 0E 12Ω 1MΩ 200TΩ See Note Below 2 MANUAL RESISTANCE RANGES IN MAN 0 1Ω TO 2 0E 12Ω as follows 10V 0 1 TO 1 0E 05Ω 0 1Ω 100KΩ 10V 1 0E 03 TO 1 0E 09Ω 1KΩ 1GΩ 100V 2 0E 05 TO 2 0E 12Ω 200KΩ 200TΩ See Note Below 3 AUTO MANUAL Same as AUTO...

Страница 36: ...LD mode discards most recent Held Value ON OFF Power up perform functional Battery tests Power down if ON Batt Test Displays GOOD on LCD if acceptable voltage or Lo if unacceptable Reset Enters saves data into Memory Register Clears HOLD and Display Test Begins measurement sequence Battery Buss ON OFF Switch isolates batteries from instrument circuits for storage Cut Off transport ...

Страница 37: ...NOTES 37 Rev C January 2012 PRS 812 Resistance Meter ...

Страница 38: ...NOTES 38 Rev C January 2012 PRS 812 Resistance Meter ...

Страница 39: ......

Страница 40: ...ville IL 60106 630 238 8883 Fax 630 238 9717 1 855 STATIC1 www prostatcorp com Prostat Corporation 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 ...

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