CHARGED-PLATE MONITOR

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.

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.