Trek 821HH User Manual

Trek Model 821HH

Hand-Held Electrostatic Voltmeter

Trek’s Model 821HH Infinitron Hand-Held Electrostatic Voltmeter represents the next generation of contacting precision surface voltage measuring instruments, providing input characteristics far beyond the limits of any currently available hand-held voltmeter product.

The Model 821HH can easily measure the voltage level of both conductive and insulative objects and surfaces with virtually zero charge transfer to the measurement probe. This results in stable high accuracy voltage measurement capability for ESDsensitive devices.

Key Specifications

Measurement Range:

Voltage Display Accuracy

Input Characteristics: Resistance greater than 1 x 10 W

Voltage Monitor Output: Scale factor at 1/1000

0 to ±2 kV DC or peak AC Better than 1% of full scale, ±1 digit

Capacitance less than

1 x 10 F

-14

Typical Applications Include

! Semiconductors

LEDs

MR head sensors

Other ESD sensitive devices

Features and Benefits

Probe tip assumes the voltage level of the measured object’s surface as the tip approaches resulting in no current

flow at the time of contact.

Battery or line operation

Easy to read LCD display Records voltage, temperature and humidity

Data graphing capabilities

! !!NIST-traceable Certificate of Calibration provided with each unit

compliant

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

716-438-7555 • 716-201-1804 (fax) • www.trekinc.com • sales@trekinc.com

Features (cont.)

A push-button for entering the menu system to Review Data, Erase Memory and Set Auto Off functions

Mechanical

Dimensions

240 mm H x 140 mm W 52.5 mm D (9.5” H x 6” W x 2” D)

Weight

1.13 kg (2.5 lb)

Ground Reference Receptacle

Banana Jack

Voltage Monitor Connector

2.5 mm plug

Operating Conditions

Temperature

15°C to 35°C (59°F to 95°F)

Relative Humidity

5% to 75%, noncondensing

Altitude

To 2000 meters (6561.68 ft.)

Electrical

Power Requirements

Internal NiMH battery or External 15 V @ 1 A Supply / Charger

Battery Operating Time

Greater than eight hours of continuous operation

Supplied Accessories

Operators’ Manual

PN: 24012 Manual with software

AC/DC Adapter

15 V @ 1 A universal AC/DC adapter

Output Monitor Cable

With 2.5 mm plug

Other

USB Cable

Certifications

Calibration

TREK, INC. certifies that each Model 821HH is tested and calibrated to specifications using measurement equipment traceable the National Institute of Standards and Technology or traceable to consensus standards

CE Compliance

IEC 61010-1

Safety requirements for electrical equipment for measurement, control and laboratory use - Part 1: General Requirements

IEC 61326-1

Electrical equipment for measurement, control and laboratory use - Part 1: General requirements

Model 821HH Specifications

Performance

Measurement Range

0 to ±2 kV DC or peak AC Accuracy

At the Voltage

Monitor Output

Better than ±1% of full scale

At the Voltage

Display

Better than ±1% of full scale, ±1 digit Bandwidth (-3 dB)

1000 V p-p sine wave: better than 1 kHz (-3 dB)

Input Characteristics

Resistance greater than 1 x 10 W

-14

Capacitance less than 1 x 10 F

-14

Current less than 1 x 10 A

Stability Drift with Time (probe in free air)

Less than 2 V/second USB Data Rate

300 ms

Displayed Information

Voltage

0 to ±2000 V with a resolution of 1 V

Zero Offset

Battery Status

Time / Date

Temperature

Maximum and Maximum Readings

Features

Automatic Shutoff

User settable: 5 minutes, 10 minutes, 15 minutes or disabled

Voltage Monitor Output (2.5 mm jack)

An output provides a low-voltage replica of the measured voltage

Scale

1/1000th of the measured voltage

Offset Voltage

Less than ±10 mV

Output Noise

Less than 10 mV rms *

Speed of Response

(10% to 90%)

Less than 500 µS for an input step change of 1 kV

Power ON/OFF

A push-button

Record / Hold

Pressing the Record / Hold push-button will hold the measurement, while pressing and holding the Record / Hold button for a period of greater than 3 seconds will store the measurement

*Measured using the true rms feature of the Hewlett Packard Model 34401A digital multimeter

Measurement and Power Solutions