Prostat PRS-812 User Manual
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Prostat PRS-812 User Manual

Resistance meter
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RESISTANCE METER
PRS-812
User Manual

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Summary of Contents for Prostat PRS-812

  • Page 1 RESISTANCE METER PRS-812 User Manual...

  • Page 3: Table Of Contents

    Instrument Controls Copyright © 2012 by Prostat® Corpora on. 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 wri en permission. For informa on contact Prostat Corpora on, 1072 Tower Lane, Bensenville, IL 60106 USA Prostat is the registered trademark of Prostat®...

  • Page 4: Introduc On & Descrip On

    5% of tolerance, and those between 1.0 and 1.0x10 ohms are within 0.5% of laboratory references While quite sophis cated in design, the PRS-812 Resistance Meter is easy to use and extremely helpful in making accurate ESD audi ng measurements, or general resistance and con nuity checks. CAUTION To avoid electrical shock or damage to the PRS-812 Resistance Meter, read this manual completely before installing ba eries or using the instrument.
  • Page 5 C. PRS-812 Basic Descrip on & Func ons The PRS-812 Resistance Meter has several test, display and data logging func ons: 1. The PRS-812 six basic measurement modes are described in the following table Rev. C / January 2012...
  • Page 6 @ 10V: 1.0E+04 TO <1.0E+06Ω (10KΩ - < 1MΩ) @100V: 1.0E+06 TO <2.0E+12Ω (1MΩ - <200TΩ) See Note Below 2. The PRS-812 provides three separate test voltages for resistance measurements as indicated in the table, above: <10 Volts 10 Volts...

  • Page 7: Cau Ons & Warnings

    Digital measurements are provided using integers and Ω, KΩ, MΩ, GΩ, TΩ indicators, or in exponen al format (1.0EXX) with Ω -TΩ indicators. 4. The PRS-812 includes data logging (storage) capabili es for up to 80 data points when RECORD is selected. The instrument will provide access to the memory register, calculate and display Minimum, Maximum and Average of all measurements in the instrument’s memory whenever...
  • Page 8 ESD Qualifi ed instrument repair personnel should perform service. 3. The PRS-812 contains Electrosta c Discharge Sensi ve (ESDS) components. Qualifi ed personnel should service it only at ESD Controlled worksta ons. Do not a empt to dismantle the PRS-812 Rev. C / January 2012...

  • Page 9: Controls, Connec Ons & Indicators

    Unauthorized opening of the PRS-801 case or dismantling in any manner WILL VOID THE INSTRUMENT’S WARRANTY. 4. Read this manual in its en rety before installing ba eries or using the PRS-812. 5. Do not drop or cause unnecessary mechanical shock to your PRS-812 instrument.
  • Page 10 (6) AUTO-MANUAL: displays data in Ω, KΩ, MΩ, GΩ and TΩ In AUTO-MANUAL the operator may select the ini al resistance range in decade increments. Once set, the PRS-812 starts the measurement process from the preset resistance decade, rather than re-zeroing itself for each measurement.
  • Page 11 PRS-812 Resistance Meter [2] RESISTANCE RANGE SELECTION Two Triangular Arrows Bu ons, UP (↑) and DOWN (↓), select Resistance Measurement Range in single orders of magnitude while in MANUAL or AUTOMATIC/MANUAL modes [3] TEST VOLTS Manual Selec on of <10, 10 or 100 volts in MANUAL selects ini al test voltage.
  • Page 12 PRS-812 Resistance Meter NOTE If RECALL is not pressed, a fi h me OOPS will be displayed in the LCD when TEST is next pressed. To Clear OOPS, press RESET. The instrument will return to normal opera ons. [5] CLEAR...
  • Page 13 Switch ba ery buss to the OFF posi on before changing ba eries to avoid re- verse polarity damage to the instrument. LCD DISPLAY ELEMENTS [11] Colored LED’s 14 LED’s across the top of the PRS-812 indicate measurement order of mag- nitude in decades from <10 to >10 ohms.
  • Page 14 PRS-812 Resistance Meter Displayed when RECALL bu on is pushed second me while in REC mode. Number displayed when MIN is indicated is the Minimum data value in Memory Register. Displayed when RECALL bu on is pushed a third me (sequen ally) in REC mode.

  • Page 15: Ba Ery Installa On And Replacement

    PRS-812 Resistance Meter Ba ery Compartment Located in lower sec on of case, opposite LCD display. Holds two 9V-transistor ba eries. Two screws secure the ba ery cover. Note: Use only Long Life Alkaline Ba eries. Remove ba eries when instrument is not in use for long periods of me.

  • Page 16: Setup & Calibra On

    6.75 volts, replace both ba eries. V. Setup & Calibra on A. Se ng up the PRS-812 for low resistance range calibra on 1. Posi on Ba ery Buss Cut Off switch to OFF posi on 2. To install ba eries, remove two Phillips locking screws and cover. A ach two Long-Life, Alkaline 9V ba eries to the ba ery connec on terminals.
  • Page 17 PRS-812 Resistance Meter Figure 5: Low Resistance Range Calibra on Shunt Installa on 2. Press the Red ON/OFF power bu on. The instrument display should become energized, each LED will be tested in sequence, and GOOD will is displayed in the LCD if the ba eries have suffi...

  • Page 18: Instrument Opera On

    VI. Instrument Opera on A. Overview of PRS-812 Opera on & Measurement Test Cycle Sequence The following 10 points provide a general overview for calibra ng and using the PRS-812 for resis- tance measurements. 1. Slide Ba ery Buss Cut Off switch to ON 2.
  • Page 19 Electrifi ca on period, i.e., the me period during which test voltage is applied to the ma- terial under test, is automa cally adjusted to the PRS-812’s measurement characteris cs and industry standards (ANSI/ESD STM11.11). Typical electrifi ca on periods are: 2 to 3 Seconds: 0.1 to less than 1.0x10...
  • Page 20 Increases LCD displayed number of data points in the Memory Register (MEM) by one, e.g., MEM 02 c. Returns the PRS-812 to its last func on mode in prepara on for the next measurement 10. To make several measurements, simply press TEST to obtain the next measurement, and then RESET to save it.
  • Page 21 fi elds on their equipment. As with most very precise instruments, the PRS-812 circuits and its cables are sensi ve to the ef- fects of electromagne c and electrosta c fi elds. These eff ects are minimized by instrument and test lead design.
  • Page 22 Refer to Na onal Electrical Codes and ESD Associa on Standard S6.1 Grounding for informa on and procedures. Only qualifi ed personnel should conduct ground test measurements. 2. Use only Prostat test leads, cables and accessories supplied with the PRS-812. Be sure that leads are properly connected to their respec ve terminals as described below.
  • Page 23 AUTO Mode 2: Auto Display in Ω, KΩ, MΩ, GΩ and TΩ indicators AUTO Mode 1 is the default func onal mode when the PRS-812 is powered up. To change to AUTO Mode 2, simply press the MODE bu on once. The AUTOMATIC modes are used in measurements where the following a ributes are desired: →...
  • Page 24 Figure 9: PRS-812 Power Up tests display circuits, LED indicators and ba eries 5. AUTO is displayed in the LCD. a. The default Mode for the PRS-812 is Automa c Resistance Measurement in exponen al format (1.0EXX). b. If measurements are to be displayed in Ohms press the Gray MODE bu on once.
  • Page 25 Test Voltage Indicators is Complete is Complete Indicators Figure 10: Comparing PRS-812 Display in Automa c Ohms Mode and Automa c Exponen al Mode a er the same low resistance measurement. F. Measurements from 1.0x10 to less than 1.0x10 ohms: 1.
  • Page 26 Figure 12: Test Voltage at 100 Volts from 1.0E+06 to 1.0E+14 Ohms in Auto NOTE The PRS-812 can obtain an accurate resistance measurement within 2.5 seconds up to 1.0x10 ohms, depending on material characteris cs. An addi onal 5.0 seconds of electrifi ca on is applied in accordance with ESD Associa on S11.11 Surface Resistance Standard.
  • Page 27 3. Once a stable measurement is confi rmed and displayed by the instrument, HOLD will be dis- played in the LCD and the electrifi ca on mer will stop. NOTE The PRS-812 provides very accurate measurements up to 1.0x10 ohms, and has the capability to display values up to 2.0x10 ohms.
  • Page 28 PRS-812 Resistance Meter 5. Set test voltage by pressing MANUAL SELECT TEST VOLTS bu on un l the desired voltage is displayed in lower right por on of LCD, i.e., <10, 10 or 100 Volts. MANUAL Test Voltage & Re- sistance Limits are defi...
  • Page 29 (and Automa c Mode) se ngs This mode prevents the PRS-812 from rese ng the Test Voltage and Resistance Range to Mini- mum at the beginning of each Measurement Test Cycle. In this mode, measurements start at the resistance range selected by the operator, and its commensurate Test Voltage, or the value of the last measurement Otherwise, it is used similar to the AUTOMATIC Mode.
  • Page 30 Ini al Test Voltage for the selected resistance decade will be applied. For example if the 10 ohms decade was selected, ini al Test Voltage will be 100 Volts. c. At this point the PRS-812’s AUTOMATIC Mode takes control of the Measurement Test Cycle: Automa cally re-adjusts RESISTANCE RANGE in accordance with material...

  • Page 31: Instrument Maintenance

    2. Only Prostat Corpora on or their authorized instrument laboratory should perform PRS-812 calibra on or repair. 3. Before shipping your instrument to Prostat Corpora on for service, contact Prostat calibra on & customer service for a Return Material Authoriza on (RMA) tracking number by the follow- ing means: See WARRANTY INFORMATION, below, for further instruc ons.

  • Page 32: Warranty Informa On

    Prostat receives no ce of such defect during the warranty period, Prostat will replace at its ex- pense such parts that it determines to be defec ve. Any defec ve part must be returned to Prostat postage prepaid with proof of purchase date.
  • Page 33 C. Shipping Non-Warranty Items 1. Any Prostat product returned for non-warranty repair or calibra on requires a Return Materials Authoriza on (RMA) number and should be packaged and shipped as described above, and as directed by Prostat’s customer service department.

  • Page 34: General Specifi Ca Ons

    PRS-812 Resistance Meter PRS-812 Resistance System Specifi ca ons Range: Resistance from <0.1 (1.0E-1) Ohms to 200 Tera ohms (1.0E+12 ohms). Maximum resistance indica on: 200 Tera ohms (2.0E+14 ohms) Test Voltages: Automa c mode Default: <0.01 to 10 volts Variable 1.0E-1 to 1.0E+4 Ohms Constant Voltage 10 volts ±...

  • Page 35: Instrument Controls

    PRS-812 Resistance Meter PRS-812 Instrument Controls FUNCTION/ MODE Toggles Through Six (6) Opera on Modes: DISPLAYED INDICA- RESIST. TEST TEST MODE UNITS TION RANGE VOLTS FUNCTIONS AUTOMATIC 1 1.0EXX AUTOMATIC RESISTANCE RANGE, AUTO AUTO. AUTO. [Default] IND Ω - TΩ...
  • Page 36 PRS-812 Resistance Meter ter. Calculates and Displays Minimum, Maximum and Average of data stored in Memory Register. Clear Erases data in Memory Register; if in HOLD mode, discards most recent Held Value ON/OFF Power-up, perform func onal & Ba ery tests, Power-down if ON.
  • Page 37 PRS-812 Resistance Meter NOTES Rev. C / January 2012...
  • Page 38 PRS-812 Resistance Meter NOTES Rev. C / January 2012...
  • Page 40 Specifi ca ons are subject to change without no ce. All Prostat trademarks and trade names are the property of Prostat Corpora on. All other trademarks and trade names are the property of their respec ve companies. P R O F E S S I O N A L...

This manual is also suitable for:

Prs-801

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