Trek 677B User Manual
Trek Model 677B
High-Voltage Power Amplifier / Supply
The Model 677B is a high-voltage power amplifier/supply designed to
provide precise control of output voltages. It can be operated in one of
two modes: as a high-voltage amplifier when it is configured as a
noninverting amplifier with a fixed gain or as high-voltage power
supply that responds to front panel controls to command exact output
voltage or current.
The 677B features an all-solid-state design for wide bandwidth, high
slew rate and low-noise operation. The four-quadrant, active output
stage sinks or sources current into reactive or resistive loads
throughout the output voltage range. This type of output is essential
to achieve an accurate output response and high slew rate demanded
by a variety of loads such as highly capacitive or reactive loads.
Key Specifications
Output Voltage Range:
! 0 to ±2 kV DC or peak AC
!
Output Current Range:
!
Slew Rate: Greater than 1 V/
!
Large Signal Bandwidth (1% distortion): DC to greater than 1.2 kHz
!
DC Voltage Gain : 200 V/V
0 to ±5 mA DC or peak AC
5 µs
Typical Applications Include
! Electrostatic beam deflection
!
Electrooptic modulation
!
Electrophoresis research
!
Piezoelectric poling and driving
Features and Benefits
! Operable as a high-voltage amplifier (in a noninverting configuration) or as a high-voltage power supply
! Four-quadrant output for driving capacitive loads
Closed loop system for high accuracy
!
Short-circuit protected for equipment protection
!
!
All solid-state design for maintenance free operation
!
DC-stable for programmable supply applications
!
Low output noise for ultra-accurate outputs
!
NIST-traceable Certificate of Calibration provided with each unit
compliant
!
TREK, INC. • 190 Walnut St • Lockport, NY 14094 • USA • 800-FOR TREK
(fax) • www.trekinc.com • sales@trekinc.com 716-438-7555 • 716-201-1804
Features
High Voltage On/Off
Local
Individual push-button switches
Remote
TTL high turns OFF the high voltage; TTL low
turns on the high voltage
Current Limit/Trip
Switch selectable for limit or trip. Graduated 1turn potentiometer adjusts from 0 to 40 mA
Out of Regulation
LED illuminates and BNC provides a TTL low
when Model 623B fails to produce HV output
such as during a current limit
Trip Status
LED illuminates and BNC provides a TTL low
when HV is disabled due to the output current
exceeding the current trip level, a high voltage
fault is detected or the top cover is removed
Mechanical
Dimensions
134 mm H x 432 mm W x 439 mm D
(5.25” H x 17” W x 17.25” D)
Weight
13.2 kg (29 lb)
Mode Switch
Selects either Amplifier or Supply operation
HV Connector
Alden High Voltage Connector
BNC Connectors
Voltage monitor, current monitor, remote HV
ON/OFF, out of regulation, fault/trip status
Amplifier Input
3-pin connector may be configured for inverting, noninverting or differential amplification
Operating Conditions
Temperature
0°C to 40°C (32°F to 104°F)
Relative Humidity
To 85%, noncondensing
Altitude
To 2000 meters (6561.68 ft.)
Electrical
Line Voltage
Factory Set for one of two ranges:
90 to 127 V AC or 180 to 250 V AC,
either at 48 to 63 Hz
Power Consumption
220 VA, maximum
Supplied Accessories
Operator’s Manual
PN: 23113
HV Output Cable
PN: 43421 (5 M; other lengths available)
Input Cable
PN: 43418 Connector Assembly
Fuses
PN: H0050: 90-127 V AC; H0049: 180-250 V AC
Line Cord (90 V to
127 V operation)
PN: N5002
Line Cord 230 V AC
Contact factory
Optional Accessories
HV Output Cable
PN: 43406
19” Rack Mount Kit
Model 603RA Full Rack Mounting Kit
Model 603 RA-2 Dual Instrument Full Rack Kit
Model 604RA Metric Rack Mounting Kit
*Measured using the true rms feature of the HP Model 34401A digital multimeter
Model 677B Specifications
Performance
Output Voltage
0 to ±2 kV DC or peak AC
Output Current
0 to ±5 mA DC or peak AC
Input Voltage Range
0 to ±10 V DC or peak AC
Input Impedance
10 kW, nominal
DC Voltage Gain
200 V/V
DC Voltage Gain
Accuracy
Better than 0.1% of full scale
DC Offset Voltage
Less than 5 mV
Output Noise
Less than 100 mV rms*
Slew Rate
(10% to 90%, typical)
Greater than 15 V/µs
Settling Time (to 1%)
Less than 300 µs for a 2 kV step
Large Signal
Bandwidth (1%
distortion)
DC to greater 1.2 kHz
Small Signal
Bandwidth (-3dB)
DC to greater than 5 kHz
Stability
Drift with Time
Less than 100 ppm/hr, noncumulative
Drift with Temp
Less than 350 ppm/°C
Voltage Monitor
Ratio
1/200th of the high-voltage output signal
DC Accuracy
Better than 0.1% of full scale
(May degrade to 0.6% in the presence of RF
fields up to 3 V/m)
DC Offset Voltage
Less than 5 mV
Output Noise
Less than 10 mV rms*
Output Impedance
0.1 W
Current Monitor
Ratio
1 V/mA
DC Accuracy
Better than 1% of full scale
Offset Voltage
Less than 5 mV
Output Noise
Less than 10 mV*
Bandwidth (-3 dB)
DC to greater than 800 Hz
Output Impedance
0.1 W
Features
Dynamics
Adjustments
Graduated 1-turn potentiometer used to
optimize the AC response for various load
parameters
Copyright ã 2013 TREK, INC. All specifications are subject to change. 1330/JRB
Measurement and Power Solutions
www.trek inc.com
TM
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