Celebrating 40 Years of Innovation: 1968-2008

Products: Charged Plate Monitors

NOW WITH ENHANCED FEATURES

  • Store & retrieve data as data points or graphs
  • Record operator comments for reference
  • "Fast" data acquisition mode now available
  • Ideal for monitoring static charge in a manufacturing facility
  • Suitable for dissipative testing of materials

Model 157

Trek's Model 157 Charged-Plate Monitor offers greater accuracy, stability and bandwidth than conventional designs. This model combines Trek's patented precision charge measurement capability with features that drive down the cost of ionizer performance testing and maintenance.

Model 157 is suitable for semiconductor, disk drive, LCD and many other manufacturing environments that are sensitive to static charge. It can be used to test all types of ionizers including room ionization systems, AC and DC blowers, nuclear ionizers, gun type ionizers, and pulsed DC ionizers. It is also useful in materials evaluation for testing dissipative qualities and charge decay analysis.

Features include a user-friendly menu system with a clear and easy-to-read digital display, powerful graphics display, manual or bar code reading capability for quick ionizer identification (and storage of associated tests results), the capability of storing hundreds of ionizer tests on board for later download and data analysis, USB port for uploading/downloading test sequences and test results to a computer, optional thermohygrometer to record temp/humidity conditions, and a lightweight static-dissipative enclosure for optimum ease of transport.

Enhanced features now include the ability to store & retrieve data as data points or graphs, the option to record operator comments for future reference, and the addition of a "fast" data acquisition mode (1 ms/data point) for rapidly-changing discharge events, to complement the "normal" mode (10 ms/data point). Static decay graphs can be saved and retrieved.

  • Technology: Trek's Model 157 employs a revolutionary charged-plate monitor design that utilizes an ultrahigh-impedance, high-voltage follower to monitor the ion collecting plate voltage. This technique provides high accuracy and virtually infinite impedance loading of the plate, while allowing the ion collecting plate to be charged and monitored through the same small-diameter cable connection.
  • Flexibility: Trek's technology makes the measurement capacitance independent of the physical size and shape of the ion plate. Therefore, the size and shape of an ion collecting plate, as well as the measurement capacitance, may be customized to match a particular ESD-sensitive device within a manufacturing process, or be made to conform to the ANSI ESD STM 3.1 standard test method.
  • Greater Bandwidth: Trek's technology also provides greater bandwidth enabling "true" responses to be observed, avoiding the masking of results which can occur with other systems.
  • Balance Tests: The Model 157 resolves 0.1 volts and features high accuracy with extremely low offset and drift, which is ideal for testing ionizers in facilities requiring critical ion balance such as in GMR and TMR manufacturing areas.
  • Discharge Tests: Start and stop voltages are programmable in 1 volt increments.
  • Ease of use: The Model 157 incorporates a user-friendly menu system. Frequently used functions are a keystroke away. A powerful graphics display emphasizes important information and provides operator prompts.
  • Portability: Designed to be small and lightweight, this unit is easily moved within a facility.
  • Long Battery Life: This model features over 8 hours of battery life for long periods of uninterrupted testing.

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PERFORMANCE

  • Monitored Voltage Range
    0 to ±1020 V DC or peak AC.
  • Bandwidth (-3 dB)
    DC to 80 Hz.
  • Zero Stability (referred to plate voltage)
    Drift with Time (no incident ion flow)
    Less than 6 V/minute.
  • Drift with Temperature
    Less than 10 mV/°C, noncumulative.
  • Decay Mode Thresholds
    • Start Voltage
      Programmable from 1 to ±1000 V in 1 V increments.
    • Start Accuracy
      Within ±1 V of programmed start voltage.
    • Stop Voltage
      Programmable from 0 to ±999 V in 1 V increments.
    • Stop Accuracy
      Within ±1 V of programmed stop voltage
      or ±0.2 V if set for less than or equal to 90 V.
  • Discharge Timer Resolution
    0.1 seconds, from 0.1 to 999.9 seconds.
  • Plate Self-Discharge (unpolarized)
    Less than 12 Volts/minute.

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PRODUCT FEATURES

  • Menu Selection and Display
    Six soft-keys and display prompts navigate the user through system operations. Automated or manual tests can be performed, programmed, or retrieved. Among the functions are:
  • +DISCHARGE, -DISCHARGE, BALANCE Tests
    Sets the plate voltage to a value just above
    the programmed start voltage and resets the discharge timer to zero.
  • BALANCE TEST
    Sets the plate voltage to 0 V ±0.5 V.
  • AUTO (Programmable)
    Series of Tests and Parameters Capability to program multiple series of combinations of +DISCHARGE, -DISCHARGE, or ION BALANCE tests.
  • Memory
    Can store or retrieve as many as 1500 manual or up to 1000 automated test results in its internal memory.
  • TEMP/RH Meter Connector
    A connector receives an input from an optional thermohygrometer (Omega Model HH311) and enables the Model 157 to display environmental data on the LCD screen and also save or retrieve the information on test results.
  • Bar Code Wand Input Connector (available for 157-1 only)
    A connector receives an input from an optional bar code wand and enables the Model 157-1 to display bar code identification on the LCD screen and also save or retrieve the information on test results. A maximum of 15 bar code characters are allowed
  • Data Retrieval and Analysis
    Data can be exported from the Model 157 into a PC computer through a USB port for later analysis or record keeping.
  • Fast Mode (data acquisition)
    When connected to a computer, data can
    be collected at a rate of 1 ms/data point
    (normal rate is 10 ms/data point). This is
    useful for evaluating the resistive or
    dissipative properties of materials.
  • Voltage Monitor Output
    A BNC providing a low voltage replica of the plate voltage.
    • Scale
      1/200th of the plate voltage.
    • DC Accuracy
      Better than 0.1% of full scale.
    • Offset Voltage
      Less than ±10 mV (referred to plate voltage).
    • Output Noise
      Less than 10 mV rms (measured using the true rms feature of the Hewlett Packard Model 34401A digital multimeter).
    • Output Impedance
      Less than 0.1 ohms.
  • LCD Display Screen with LED back-light
    127 mm x 38 mm (5" x 1.5") screen displays all test data and program options with date and time display.
    Resolution
    240 x 64 pixels.
  • Ion Collecting Plate (ordered separately)
    • Meets ESD Association Standard ANSI/ESD-STM3.1 requirements for:
      • Dimensions
        150 mm x 150 mm square (6" x 6" square).
        25 mm x 25 mm square (1" x 1" square).
      • Capacitance
        20 pF ±2 pF.
    • Non-standard Option
      • Dimensions
        Specify when ordering.
      • Capacitance
        Specify when ordering.
    High Temperature Ion Collecting Plates
    • Model 156P-HT 150mm x 150mm Charge Plate
      • Dimensions
        15.3 cm x 15.3 cm square, (6" x 6" square) ion collecting plate
      • Cable Length
        2.7 meters
      • Capacitance
        20 pF ±5 pF
      • Operating range
        -60° to 160°
      • Relative Humidity
        To 85%, noncondensing
    • Model PD04002AP
      • Dimensions
        25 mm x 25 mm (1" x 1") ion collecting plate
      • Cable Length
        3 meters
      • Capacitance
        20 pF ±5 pF
      • Operating Range
        -60° to 160° C
      • Relative Humidity
        To 85%, noncondensing
    Power On/Off
    An electronic switch controls the power to the unit and also turns on the display back-light.

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GENERAL

  • Power Requirements
    Available for all nominal line voltages. Contact TREK, INC. or an authorized service organization for more information. The Universal Battery Eliminator/Charger Model 1K010 provides the following input power:
  • Specifications
    • Output Connector
      2.1 mm DC power plug.
    • Voltage
      15 V DC, ±5%.
    • Current
      2 A.
  • Battery Operation
    Rechargeable battery (internally installed).
    • Operating Time
      Greater than 8 hours from a full charge.
    • Recharge Time
      Less than 3 hours to full charge.
    • Battery Status Indicator
      LCD screen battery status indicator.
  • Operating Conditions
    • Temperature
      5 °C to 35 °C.
    • Relative Humidity
      To 80%, noncondensing.
  • Instrument Dimensions
    102 mm H x 254 mm W x 241 mm D
    (4" H x 10 " W x 9.5 " D).
  • Instrument Weight
    2 kg (4.4 lb).
  • Voltage Monitor Connector
    BNC coaxial connector
  • Ground Receptacle
    Banana jack.
  • Cable from Instrument to Floating Plate
    Coaxial type. Diameter of 4.95 mm (0.195²). Length of 3 meters (10 ft), nominal.
    • Diameter
      4.95 mm (0.195").
    • Length
      3 meters (10 ft), nominal.
  • USB Port Connector
    Standard USB receptacle on Model 157 unit connects to a PC for data exchanges or transfers.
  • COMPUTER REQUIREMENTS
    The Model 157 applications software runs on a PC compatible computer, Pentium class processor or better, Windows 98 or better, 2000, or NT, with 16 Mb of RAM, and an available USB port.
  • ACCESSORIES SUPPLIED
    Operator’s manual for unit, Universal AC Adapter kit (100 to 240 V AC ±10%), PC based computer software, and a 2.7 meter (9 ft.) stackable banana to banana cord, and carrying case.
  • OPTIONAL ACCESSORIES
    Ion Collecting Plate Tripod, Thermohygrometer (Omega Model HH311 and cable), and bar code wand with DB9 connctor.

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CERTIFICATION

TREK, INC. certifies that each Model 157 is tested and calibrated to specifications using measurement equipment traceable to the National Institute of Standards and Technology to traceable to consensus standards. A Certificate of Calibration accompanies each instrument when it is shipped from the factory.

  • Low Voltage Safety Compliance
    • Overvoltage Category
      CAT I: Peripheral level outputs (less than 60 volts).
    • Pollution Category
      Degree 1: Operate in environments where no
      pollution or only dry, nonconductive pollution occurs.

All specifications are subject to change.

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