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PROSTAT PRS-812B Resistance Meter Set

Portable, precision resistance measurement from 0.1 to 9.9 x 1012 ohms.
  • Accurate Wide Range Resistance Measurements: 0.1 Ω to 9.9x1012 Ω with overall nominal accuracy <±5%
  • Variable Voltage 0.1 mv to 9.99 V for low resistance measurements
  • Constant Test voltages 10V and 100V for specification measurements to meet international and domestic ESD measurement standards
  • Auto Resistance Range Control
  • Auto Test Voltage Control
  • 120 Data Point Memory

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Wide Range. Accurate. Portable.

The PRS-812B is a wide range portable constant voltage resistance instrument designed for dedicated ESD Auditors and professionals. The PRS-812B is a cost effective choice for those ESD professionals who require outstanding accuracy and performance, but do not require data downloading. Like its big brother the PRS-801B, the PRS-812B has an outstanding performance combination of measurement speed, wide range and accuracy. Its constant test voltage system is extremely stable and consistent with lab level, bench top instruments.

Measurement Range

The PRS-812B’s accurate wide range of 0.10 to 1.00×1012 ohms, offers exceptional flexibility in measurement applications. In effect, it is 3 instruments in one because it functions as:

  1. A low resistance range instrument for measurements from 0.1 to 1.0x104 ohms. Most competitive instruments do not measure accurately at or below 1.0x103 ohms. Thus, the typical ESD practitioner must carry a DMM for low resistance checks of ground connections.
  2. A wide range audit instrument that meets and exceeds requirements for ANSI/ESD S20.20 and TR53 periodic verification (audit) procedures from 1.0x103 to 1.0x1011 ohms.

    Measurement guidelines require accurate measurements from one decade below to one decade above the resistance requirements of a facility’s ESD program. The PRS-812B easily exceeds this requirement by as much as 2 decades, depending on program requirements.

  3. Precision high resistance instrument for Packaging measurements to S541 Standards, for material and product testing, and acceptance verification. Few competitive instruments can measure accurately up to or beyond 1.00×1011 ohms, while the PRS-812B comfortably measures up to 1.00×1012 ohms.

Measurement Flexibility

Connect to Virtually any 2-wire Fixture or electrode configuration.

The PRS-812B’s simple ¾ inch terminal spacing provides connectivity to a variety of electrodes and fixtures.

  • Terminal design allows use of mechanically shielded or non-shielded banana plug leads
  • BNC adapters with ¾ inch spacing mount directly to the PRS-812B terminals for measurements with wide range probes and fixtures

Measurement Speed: Electrification Period

Along with the PRS-801B, the PRS-812B is one of the fastest measurement instruments in today’s precision measurement market. Laboratory tests confirm the PRS-812B can measure from 0 to 1.0×1012 ohms in 2.5 seconds. Its EP is automatically adjusted to insure a stable measurement is displayed.

Multiple Modes of Operation

The PRS-812B has Automatic, Manual and Auto-Manual operational modes, plus exponential display or standard numeric display in Ω, KΩ, MΩ, GΩ and TΩ. It’s easy to use and read. Measurements are summarized in decades using multiple LED’s from <102 to >1012.

    Technical Specifications

    RANGE Optimal Resistance Range from 0.10 (1.00E-1) Ohms to 1.00 Tera ohms (1.00E+12 ohms).
    TEST VOLTAGES

    Automatic Mode (Default): 0.01 volts to 10 volts Variable 1.0E-1 to 1.0E+4 Ohms

    Constant Voltage:
    10 volts: ± <0.2 volts 1.0E+4 to <1.0E+6 Ohms
    100 Volts: ± <2.0 volts 1.0E+6 to >1.0E+12 Ohms

    Manual Mode:
    0.01 volts to 10 volts Variable 1.0E-1 to <1.0E+5 Ohms
    10 volts: ± <0.2 volts 1.0E+2 to 1.0E+9 Ohms
    100 volts: ± <2.0 volts 2.0E+5 to >1.0E+12 Ohms
    ACCURACY Overall: ± <5% at ambient conditions (at 23°C and 30% Rh).

    Specific Range Tolerances:
    1.0E-1 to 1.0E+1 ohms: ±5% Corrected for Test Lead Resistance
    1.0E+1 to 1.0E+12 ohms: ±2.0% with 10-foot Test Leads
    DISPLAY Multi-function 2-5/8” x 1-5/8” Liquid Crystal Display with 0.5" digit height.
    Displays 3-1/2 digits in Ohms, or 1.0EXX in exponential format.
    Ohms Display indicators: Ω, KΩ, MΩ, GΩ and 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 (seconds), 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 12 Color LED’s from 1.00E-1 ohms.Colors (RED, GREEN, YELLOW/ORANGE, or Blank/OFF)
    TIMER Times measurements in Seconds up to 990 seconds (Displayed on LCD)
    MEMORY Register stores up to 120 data points
    ELECTRIFICATION:
    Resistance Range Electrification Period
    0.1 to <1.0E06 Ohms <3.0 seconds
    1.0E06 to <1.0E12 8.0 seconds

    Note: Electtrification period varies based on conditions & material stability.
    POWER Li-ion Rechargeable Batteries. Nominal battery life 120 hours in Continous Mode. Greater than 300 hours in Auto-Manual Mode
    DIMENSIONS 4.5″ wide x 7.5″ long x 2.0″ deep.
    WEIGHT 18 ounces
    OPEN CIRCUIT CURRENT (I) <4 ma @ 100 Volts
    RESISTANCE RANGE SELECT Select Resistance Range in single decades in Manual and Automatic/Manual modes.
    TEST VOLTS Manual Selection of <10, 10 or 100 volts in Manual Mode
    RECORD/RECALL Turns Memory Register ON if OFF. Provides access to all data in Memory Register.
    Calculates and Displays Minimum, Maximum and Average of data stored in Memory Register.
    CLEAR Erases all data in Memory Register; if in HOLD mode, discards the 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 CUT OFF ON/OFF Switch isolates batteries from instrument circuits for storage & transport
    USEFUL MODES OF OPERATIONS

    Auto Mode:
    The instrument automatically selects and adjusts test voltage, resistance range, electrification period, then displays and Holds the measurement. The displayed measurement is the average of eight consecutive measurements, all within ±5% of each other. The measurement is “saved” in the Memory Register by pressing RESET. The instrument is now ready for the next measurement.

    Manual Mode:
    Allows operator to select resistance decade, test voltage and electrification period (EP).

    Automatic Manual:
    Same as Auto Mode with following exceptions:

    - Allows operator to select starting resistance decade

    - Always starts measurement from the last measurement value without resetting to zero. This extends battery life & speeds up measurement sequence.
    DATA LOG & CALUCULATION In RECORD mode, the PRS-812 stores up to 80 measurements, and on demand will calculate and display the Minimum, Maximum and Average measurements stored in the register.

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    PRS-812B Resistance Meter Set {PRS-812B}

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