Trek 542A Non-Contacting Electrostatic Voltmeter for EOS-ESD - Manual (Page 2)

Model 542A Specifications
Performance
Measurement Ranges
Model 542A-1 0 to ±10 kV DC or peak AC
Model 542A-2 0 to ±20 kV DC or peak AC
Speed of Response (10%
to 90%) Less than 50 ms for a ±1 kV step
Accuracy Better than ±5% of the reading ±0.2% of
full scale over a probe-to-surface
separation of:
Model 542A-1 15 mm to 30 mm
Model 542A-2 30 mm to 60 mm
Drift with Time Less than ±1% full scale, non-cumulative
Monitor Output
Model 542A-1 1/1000th of the measured voltage
Model 542A-2 1/2000th of the measured voltage
Output Noise Less than 30 mV rms*
Output Impedance 47 W
Features
Alarms Activated if measured voltage exceeds
preset threshold limits; positive/negative
limits may be programmed separately
Visual Front-panel LED illuminated at threshold
Audible Programmable pulsating or continuous
tone. (+) and (-) alarms have different tone
rates for the pulsating tone selection
Alarm Relay Output Form C relay contact rated at 175 V
maximum, 5 W
Alarm Digital Output TTL output with a TTL low as the alarm
“ON” status
Reset Button Resets Alarms and Peak Hold to zero
Zero Control Adjustable to produce zero volts when
probe coupled to a known zero voltage
source
Alphanumeric LCD Display 20 character by four line (20x4) LCD
displays the present voltage and holds the
most positive and most negative
measured values
Ground Receptacle Banana jack
Serial Port and USB Port Provides control of specific functions and
acquires sensor data utilizing Trek
software and a PC connected to the RS-
232 serial port or the USB Type B port
(connectors for each are on the back
panel)
Features (cont.)
Current Output Provides a current of 4 mA to 20 mA
representing -10 kV to +10 kV (542A-1) and
-20 kV to +20 kV (542A-2)
Menu ↑↓Buttons Used to select and program menu options the
↑↓ set the alarm threshold voltages, alarm
conditions and alarm reset type
Mechanical
Dimensions 97 mm H x 152 mm W x 204 mm D
(3.8” H x 6” W x8” D)
Weight 0.77 kg (1.7 lb.)
Operating Conditions
Temperature 15°C to 35°C (59°F to 95°F)
Relative Humidity 5% to 85% RH, non-condensing
Altitude To 2000 m (6561.68 ft.)
Electrical
Power 15 V DC ±20%, 800 mA, power bus or
AC/DC adapter with a 2.1 mm DC plug.
Positive polarity connected to the center
contact
Power ON/OFF Rear panel switch
Supplied Accessories
Operator’s Manual PN: 24004 (with PN 45833 software CD)
6P/4C Plug PN: N9056
Serial Cable PN: BA108
Ground Cord PN: N9044
Optional Accessories
AC/DC Adapter PN: F5054R
Walking Test Adapter CN: 1K040
Probes**
45º Orientation Model No: 542P-45D. Aperture 3.8 mm (0.15”)
diameter. Dimensions 11 mm dia x 79 mm L
(0.43” dia. x 3.1” L)
Side Orientation Model No: 542P-S. Aperture 4 mm (0.156”)
diameter. Dimensions 13 mm dia x 75 mm L
(0.51” dia x 3” L)
Probe Cable Length 5 meters (16 ft.) nominal
**Vacuum application probes are also available
Copyright ã 2013 TREK, INC. All specifications are subject to change. 1339/JRB
Probe Aperture
79 mm
11 mm 9.7 mm
Probe Aperture
75 mm
13 mm 9.7 mm
Measurement and Power Solutions
TM
*Measured using the true rms feature of the HP Model 34401A digital multimeter