HARDWARE REQUIREMENTS

PC compatible computer, 486DX66 or better, Windows 95 or 98, 16 Mb of RAM, and a high speed communications port (16550 or equivalent UART).Serial Port Connector (156A/1 only)
25 pin receptacle on unit for connection to a high speed communications port (16550 or equivalent UART) for the computer interface.

ION COLLECTING PLATES

Standard Plates (ordered separately) include 15.3 cm x 15.3 cm (6" x 6" square) plate (Model 156AP-C150x150-R3M) and a 25 mm x 25 mm (1" x 1") plate (Model 156P-C25x25-S3M).

Special Plates can be ordered separately. Custom plate sizes are available by special order.

Standard Option
Meets ESD Association Standard ANSI/ESD-STM3.1 requirements for:

• Dimensions
  15.3 cm x 15.3 cm square, (6" x 6" 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%, noncondens

[Low Profile Charge Plate] Model 156P-LP 150mm x 150mm Charge Plate (6" x 6" square).
DI (de-ionized) Water Probes / Low Profile Charged Plate Information (PDF)

Trek's Model 156P-LP Low Profile Charged Plate provides a design used for ESD monitoring of sensitive manufacturing processes in tight spacing situations. The thin plate is under 7 mm in height, light-weight and can be hand-held for easy transport.

• Dimensions
  15.3 cm x 15.3 cm square, (6" x 6" square) ion collecting plate,
  plate hieght is under 7 mm H.
• Cable Length
  2.7 meters
• Capacitance
  20 pF ±5 pF
• Operating range
  5° C to 25° C
• Relative Humidity
  To 70%, noncondensing

• DI Water Probes

Trek's Model PM08035 DI [deionized] probes can be used for electrostatic measurement of de-ionized water. Applications include use during critical wafer sawing processes to monitor charge accumulation. These probes can be used with other applications or processes involving de-ionized water.

Two probe models are available for user defined or application specific purposes:

• Model PM08035A Probe
  0.25 inch sensor.
  
• Model PM08035B Probe
  Independent wire sensor.

Contact factory for more information.
DI (de-ionized) Water Probes / Low Profile Charged Plate Information (PDF)

GENERAL

Power Requirements
Battery Eliminator/Charger
Available for all nominal line voltages.

Output Connector
2.1 mm DC power plug.

Battery Operation
Rechargeable battery, supplied.

Operating Time
More than 8 hours from a full charge (156A).
More than 6 hours from a full charge (156A/1).

Recharge Time
3 hours to full charge.

Other
Low battery indicator.
Full charge indicator.

Operating Conditions

• Temperature
  5 °C to 35 °C.
  Relative Humidity
  To 80%, noncondensing.Instrument
• Dimensions
  83 mm H x 318 mm W x 280 mm D
  (3.25" H x 12.5" W x 11" D).

Instrument Weight
Approx. 2 kg (4.4 lb).

Voltage Monitor Connector
BNC coaxial connector.

Ground Receptacle
Banana jack.

Cable from Instrument to Floating Plate
Coaxial type.

Diameter
4.95 mm (0.195").

Length
3 meters (10 ft), nominal.

PERFORMANCE

Monitored Voltage Range
0 to ±1100 V DC or peak AC.

Small Signal Bandwidth (-3 dB)
DC to 1 kHz (measured at 20 V p-p).

Large Signal Bandwidth
DC to 10 Hz (measured at 2000 V p-p).

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
  156A unit,156A/1 unit and software programmable from 1 to ±1000 V in 1 V increments.
• Start Accuracy
  156A unit,156A/1 unit and software within ±1 V of programmed start voltage.
• Stop Voltage
  156A unit,156A/1 unit and software software programmable from 0 to ±999 V in 1 V increments.
• Stop Accuracy
  156A unit,156A/1 unit and software within ±1 V of programmed stop voltage.

Plate Self-Discharge (unpolarized)
Less than 12 V/minute.

PRODUCT FEATURES

Mode Select
A three-position toggle switch that selects the +Decay, the -Decay, or the Float mode of operation. This switch is also used in combination with the Test/Reset Control switch to program the START and STOP voltages.

Test/Reset Control
A momentary toggle switch used in conjunction with the Mode Select switch to program the START and STOP voltages.

+Decay and -Decay Modes
Sets the plate voltage to a value greater than the programmed start voltage and resets the decay timer to zero.

Float Mode
Sets the plate voltage to 0 V ±2 V.

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.
• 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 Ω.Plate Voltage

Digital Panel Meter
3 1/2 digit red LED display.

• Range
  0 to ±1100 V.
• Resolution
  1 volt.
• Accuracy
  Better than 0.1% of full scale, ±1 count.

Decay Time Digital Panel Meter
4-digit red LED display.

• Range
  0 to 9999 seconds.
• Resolution
  0.1 seconds, from 0.1 to 999.9 seconds;
  1 second, from 1000 to 9999 seconds.
  (The display will indicate "- - - -" when the decay time exceeds 9999 seconds.)

Power On/Off
A two-position rocker switch.

ACCESSORIES

Accessories Supplied

• Operator’s manual for unit, PC based computer software (156A/1 only), and a 2.7 meter (9 ft.) stackable banana to banana cord.
• A computer communications cable for the 156A/1. The cable is a 25 pin (plug) from unit to a 9 pin or 25 pin (receptacle) which connects to a PC laptop or desktop computer.

Accessories Available

• Battery Eliminator/Charger (115 V AC), International AC Adapter Kit (100 to 240 V AC), Ion Collecting Plate Tripod, and Carrying Case.

  
  

CERTIFICATION

TREK, INC. certifies that each Model 156A and Model 156A/1 are tested and calibrated to specifications using measurement equipment traceable to the National Institute of Standards and Technology or traceable to consensus standards A Certificate of Calibration accompanies each instrument when it is shipped from the factory.

All specifications are subject to change.