Trek 157 User Manual

Model 157

Now with Enhanced

Features!

Charged-Plate Monitor

Trek's Model 157 Charged-Plate Monitor offers greater provides high accuracy and virtually infinite impedance
accuracy, stability and bandwidth than conventional loading of the plate, while allowing the ion collecting
designs. It combines Trek's patented precision charge plate to be charged and monitored through the same
measurement capability with features that drive down small-diameter cable connection.
performance testing and maintenance costs.

Flexibility: The measurement capacitance is

Model 157 is suitable for semiconductor, disk drive, independent of the physical size and shape of the ion
LCD and many other manufacturing environments that plate. Therefore, the size and shape of an ion collecting
are sensitive to static charge. It can be used to test all plate, as well as the measurement capacitance, may be
types of ionizers including room ionization systems, AC customized to match a particular ESD-sensitive device
and DC blowers, nuclear ionizers, gun type ionizers, and within a manufacturing process, or be made to conform
pulsed DC ionizers. It is also useful in materials to the ANSI/ESD-STM3.1 standard test method.
evaluation for testing dissipative qualities.

Greater Bandwidth: Trek's technology also provides

Features include a user-friendly menu system with a greater bandwidth enabling "true" responses to be
clear and easy-to-read digital display, powerful graphics observed, avoiding the masking of results which can
display, manual or bar code reading capability for quick occur with other systems.
ionizer identification (and storage of associated tests
results), the capability of storing hundreds of ionizer Balance Tests: The Model 157 resolves 0.1 volts and
tests on board for later download and data analysis, features high accuracy with extremely low offset and
USB port for uploading/downloading test sequences drift, which is ideal for testing ionizers in facilities
an d t e s t r e s u lt s t o a c o m p ute r, op t i on a l requiring critical ion balance such as in GMR and TMR
thermohygrometer to record temp/humidity conditions, manufacturing areas.
and a lightweight static-dissipative enclosure for
optimum ease of transport. Discharge Tests: Start and stop voltages are

programmable in 1 volt increments.

Enhanced features now include the ability to store &
retrieve data as data points or graphs, the option to Ease of use: The Model 157 incorporates a user­record operator comments for future reference, and the friendly menu system. Frequently used functions are a
addition of a "fast" data acquisition mode (1 ms/data keystroke away. A power ful graphics display
point) for rapidly-changing discharge events, to emphasizes important information and provides
complement the "normal" mode (10 ms/data point). operator prompts.

·

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

Techn o l o gy: Trek's Mo d e l 157 e mploy s a Portability: Designed to be small and lightweight, this
revolutionary charged-plate monitor design that utilizes unit is easily moved within a facility.
an ultrahigh-impedance, high-voltage follower to
monitor the ion collecting plate voltage. This technique Battery Life: Features over 8 hours of battery life.

Measurement and Power Solutions

TM

www.trekinc.com

Model 157 Charged-Plate Monitor Specifications

Model 10/40A Specifications

Performance Features (cont.) General

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 less than or equal to 90 V.

Discharge Timer Resolution

0.1 seconds, from 0.1 to 999.9 seconds.

Plate Self-Discharge Rate

Less than 12 volts/minute.

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 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.

Memory

Can store or retrieve as many as
1500 manual tests or up to 1000
automated test sequences.

compliant

TEMP/RH Meter Connector

A connector receives an input from an
optional thermohygrometer 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 Input Connector

A connector receives an input from an
optional bar code reader and enables the
Model 157 to display bar code
identification on the LCD screen and also
save or retrieve the information on test
results.

Data Retrieval and Analysis (USB Port)

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 Factor

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.

Output Impedance

Less than 0.1 W.

LCD Display Screen with LED back light

127 mm x 38 mm (5² x 1.5²) screen
displays all data and program options.

Resolution

240 x 64 pixels.

Ion Collecting Plates (ordered separately)
Other capacitances and sizes available.

Dimensions

150 mm x 150 mm, (6²x 6² square).
25 mm x 25 mm, (1²x 1² square).

Capacitance

20 pF ±2 pF.

Power Requirements

Battery Eliminator/Charger Model 1K010
available for all nominal line voltages.
Contact TREK, INC. or an authorized
service organization for more information.

Output Connector

2.1 mm DC power plug.

Output Voltage

15 V DC.

Output Current

2 A.

Battery Operation

Rechargeable battery, supplied.

Operating Time

Greater than 8 hours from a
full charge (with no LED back light).

Recharge Time

Less than 3 hours to full charge.

Recharge Degree

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

(4² H x 10² W x 9.5² D).

Instrument Weight

2 kg (4.4 lb).

Voltage Monitor Connector

BNC 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.

USB Port Connector

Connects to a PC for data exchanges or
transfers.

Copyright ã 2011 TREK, INC.
All specifications are subject to change.
1124/DEC

Model 157 Ordering Information

Charged-Plate Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Model 157

Charged-Plate Monitor with bar code reader. . . . . . . . . Model 157-1

Ion Collecting Plates

Standard Plates (ordered separately)

150 mm x150 mm (6² x 6² square) plate . . . . . . . . . . . . . . 17397

25 mm x 25 mm (1² x 1² square) plate . . . . . . . . . . . . . . . . 17375

Special Plates (ordered separately)

TREK, INC. • 190 Walnut Street • Lockport, NY 14094 • USA • 800-FOR TREK

(fax) • www.trekinc.com • [e-mail] 716-438-7555 • 716-201-1804

Included Accessories:

Operator’s Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23280

Software CD-ROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45833

Banana to Banana Stackable Cord (9 ft.) . . . . . . . . . . . . . . . . . . N9044

Universal AC Adapter (100 V to 240 V AC ±10%). . . . . . . . . . . . 1K010

USB Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . BA103

Carrying Case for unit and accessories . . . . . . . . . . . . . . . . . . . 43863

Optional Accessories:

Ion Collecting Plate Tripod. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DK142

Thermohygrometer Kit (Omega HH311& cable) . . . . . . . . . . . . 1K028

Bar Code Wand with DB9 Connector . . . . . . . . . . . . . . . . . . . . . M1028