Model 523 - Krohn-Hite Corporation

Model 523 - Krohn-Hite Corporation
“Quality” in Test and Measurement Since 1949
DC Source/Calibrators, Tunable Electronic Filters,
Wideband Power Amplifiers
Precision Phasemeters, Distortion Analyzers
Function Generators, RC Oscillators
Model 523
DC Voltage/Current Source/Calibrator
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DC Voltage and Current
Relative Accuracy (90 days): ±4ppm
Stability: ±1ppm
Resolution: 7½ Digits
Wideband Noise (100kHz): <7µVrms
Maximum Output Current: 110mA
2 and 4-Wire Output
Auto Zero Offset Calibration (AZOC)
Automated “Covers On Calibration”
Certified to N.I.S.T.
GENERAL DESCRIPTION
The NEW Krohn-Hite Model 523 Precision DC Source is a highly
stable and repeatable dc voltage source and dc current source
providing N.I.S.T. traceable voltages and currents for use in
production, calibration labs, QA and QC departments, design
labs, or any place where an accurate voltage and current source is
needed.
Using Krohn-Hite’s state-of-the-art reference, the 523 provides
accurate and stable voltages from ±10nVdc to ±110.99999Vdc to
within ±4ppm for 90 days (±8ppm for 1 year), and precise currents
from ±10nA to ±110.99999mA to within ±8ppm for 90 days
(±16ppm for 1 year). It is an extremely quiet source with
<7µVrms of noise measured over a 10Hz to 100kHz bandwidth
(<2µVrms 0.1Hz to 10Hz).
The 523 features a user friendly 7½ digit display and a membrane
keyboard entry of all settings. Output settings can be modified
using a plus/minus delta function, multiply/divide function and
curser control keys that allow placing a curser on any digit to
increment or decrement its value. Output 2-wire, 4-wire and
chassis grounding are accomplished with one keystroke or over
the GPIB interface bus. A crowbar function places the output in a
safe mode when desired. The 523 output can be set to 0 volts,
allowing the output sense to maintain a true 4-wire low impedance
zero output. It is also quickly forced to zero before a range change
to prevent any "surprise voltages" from appearing.
An AUTO ZERO OFFSET CALIBRATION (AZOC) returns any
thermally generated offsets to within specified limits and is
accessible via the front panel or over the GPIB interface bus. The
unit is designed for a "Covers On Calibration” using the
KH523CAL Test and Calibration Software Program (Field
Calibration License required). With the KH523CAL program and
either an HP3458 or Fluke 8508A Digital Voltmeter, unattended
calibrations can be made in approximately 15 minutes.
The 523 provides for the storage of up to 31 output settings that
can be recalled at any time. Internal operating temperature, serial
number, last calibration date and firmware version can all be
called to the display for quick access when needed. Error
messages are displayed when incorrect or out-of-range entries are
made.
APPLICATIONS
Krohn-Hite's NEW Model 523 is well suited for many
applications where an extremely accurate and stable dc voltage or
dc current is needed. At a cost much less than most sources in its
class, the 523 can be a valuable asset to any company's production
line, calibration lab, QA and QC department and design lab.
OUTPUT SPECIFICATIONS
The following specifications are with a constant internal operating
temperature equal to 40ºC ±1ºC. The HP3458A NPLC is set for
100 and AUTO CAL cycle (ACAL) run. The Model 523’s
calibration is normally done at a room temperature of 23ºC ±1ºC.
The internal Cal Temp is saved at the time of calibration and can
be displayed with the present internal temperature using the
[TEMP] key.
The 90 day and 1 year specifications are within 24 hours of a zero
CQL (AZOC) cycle,
and a constant internal operating
temperature equal to 40ºC ±1ºC. The zero CAL (AZOC) cycle
takes out the effect of internal DC offset drift.
Krohn-Hite Corporation, 15 Jonathan Drive, Unit 4, Brockton, MA 02301
Tel: 508-580-1660; Fax: 508-583-8989; www.krohn-hite.com; email: sales@krohn-hite.com
Page 1 of 3
523Data.vp
DC Source/Calibrator
Model 523
SPECIFICATIONS
(Specifications apply at an internal temperature of 40ºC ±1ºC, <70% relative humidity.)
Absolute Uncertainty±1ºC
from calibration temperature
( see Note 2 )
Relative Uncertainty
±1ºC ( see Note 1 )
90 Days
Range
1 Yr
Res.
24 Hours
-------------------------------
90 Days
Stability
±1ºC *
1 Yr
±(ppm output + µV or nA)
24 Hours
---------------------------
DC Voltage
111.11119mV
1.1111119V
11.111119V
110.99999V
10nV
100nV
1µV
10µV
4+2
4+3
4 + 20
6 + 200
8+2
8+3
8 + 20
10 + 200
3+2
3+2
3 + 10
5 + 100
6+2
6+3
6 + 20
8 + 200
10 + 2
10 + 3
10 + 20
12 + 200
1+1
1+1
1 + 10
1 + 100
1nA
10nA
8 + 40
8 + 200
16 + 40
16 + 200
4 + 20
+44 to -4, ±400
10 + 40
+50 to -10, ±400
18 + 40
+58 to -18, ±400
2 + 20
2 + 100
DC Current
11.111119mA
110.99999mA **
* Non-Additive
** For values between 12mA and 110mA use graph provided with PCR100 Precision Current Resistor.
Note 1: The RELATIVE ACCURACY specifications are to the HP3458A Digital Voltmeter used for calibration.
Note 2: The absolute accuracies and traceability to N.I.S.T. include the traceability accuracies of the calibration standard and
the maintained RELATIVE accuracies of the HP3458A added to the 523 RELATIVE specifications.
Note 3: Current calibration uses an external precision 100-ohm resistor (Krohn-Hite Model PCR100) and measures the
voltage using a 4-wire Kelvin connection to the resistor.
Temperature Coefficient
Range
18ºC - 28ºC
0ºC - 40ºC
Linearity
±1ºC
Noise
0.1Hz - 10Hz
10Hz - 100kHz
p-p
rms
±(ppm output + µV or nA)/ºC
Equivalent
Output Z0
(ohms)
DC Voltage
111.11119mV
1.1111119V
11.111119V
110.99999V
1 + 0.2
1 + 0.5
1+1
2 + 10
2 + 0.2
2 + 0.5
2+1
4 + 10
1+1
1+1
1 + 10
1 + 100
2µV
2µV
4µV
40µV
7µV
7µV
15µV
100µV
0.1µ
1µ
10µ
100µ
2+5
2 + 10
4+5
4 + 10
1 + 20
1 + 100
20nA
200nA
150nA
300nA
10G
1G
DC Current
11.111119mA
110.99999mA
Temperature coefficient is best straight line fit method.
Line Regulation: <±0.1ppm change for a 10% change from
normal line voltage, typically no measurable change.
output impedance; <100nA change for a 100V change in
compliance voltage for output currents ³11.11112mA,
equivalent to >1 Gig-ohm output impedance.
Load Regulation 4-Wire operation: <±0.1ppm change
from no load to 100mA full load, typically no measurable
change. Measurements must be made at sense lead
connection point to the load.
Compliance Voltage Limit: Settable in 1V steps from 1V to
110V. Compliance limits approximately 15% +0.25V above
the setting.
Compliance Voltage Effect On Current Output:
<10nA change for a 100V change in compliance voltage for
output currents <11.11112mA, equivalent to >10 Gig-ohm
Warm-Up Time from a Cold Start: 1 Hour to within 5ppm of
final value. 4 Hours to rated accuracy and final value.
Settling Time: <10ms.
Krohn-Hite Corporation, 15 Jonathan Drive, Unit 4, Brockton, MA 02301
Tel: 508-580-1660; Fax: 508-583-8989; www.krohn-hite.com; email: sales@krohn-hite.com
Page 2 of 3
523Data.vp
DC Source/Calibrator
Maximum Output Current: ±110mA. Output protected
from damage with a current limiter. Output may be shorted
to ground indefinitely.
Calibration: The Model 523 is specified with a 1-year
calibration cycle. An AUTO ZERO OFFSET CALIBRATION
(AZOC) is provided that returns any thermally generated
offset to within specified limits, and can be accessed via
front panel controls or over the GPIB interface bus. The
Model 523 is designed for a “Covers On” calibration using
the KH523CAL Test and Calibration Software Program
(license required). The KH523CAL software, together with
an HP3458A or Fluke 8508A Digital Voltmeter, allows
virtually unattended calibration to be performed in
approximately 15 minutes. The calibration date and internal
temperature is stored in memory and can be called to the
display or over the GPIB interface bus.
Calibration
Temperature
Limits
(“Covers-On
Calibration”): Internal temperature (T Cal), 40ºC ±1ºC;
Ambient temperature
(T Amb), 0ºC to 30ºC.
Model 523
SAFETY
The Model 523 is designed to meet the requirements of the
following standards of safety for electrical equipment for
measurement, control and laboratory use: IEC61010-1,
EN61010-1
ELECTROMAGNETIC COMPATIBILITY
Emissions and Immunity: EN61326-1, EMC, 61000-4-2;
ESD, 61000-4-3; Radiated Immunity, 61000-4-4; EFT,
61000-4-5; Surge, 61000-4-6; Conducted Immunity,
61000-4-8; Magnetic Immunity, 61000-4-11; Voltage
Interuption EN61010-1.
CE Compliant for Class B Equipment.
MECHANICAL
Power Requirements: Selectable 105-130 or 210-260
volts ac, single phase, 50Hz to 60Hz, 60 watts
Dimensions and Weights: 3.5“ (9cm) high, 14" (36cm)
wide, 12.5” (32.13cm) deep; 12 lbs (5.4kg) net, 14 lbs
(6.3kg) shipping.
Protection: Voltage mode, short-circuit and over-load
protected. Current mode, open circuit protected. Indication
by display message. Automatic recovery.
Operating Temperature Range: 0ºC to 50ºC.
GPIB PROGRAMMING
PCR100: 100 Ohm Precision Current Resistor
Switching Time: Typically 300ms.
RK-314: Rack Mount Kit permits the installation of the
Model 523 into a 19” rack spacing.
Subsets: SH1, AH1, T6, SR1, RL1, PP1, DC1, DC1, DT1,
CO, E1.
Line Termination: The GPIB OEI signal is always sent with
the last character on a line.
Talker Function: Allows interrogation of the Model 523 by a
controller.
TERMINALS
Output Terminals are mounted on both the front and rear
panels. Only one set of terminals may be used at a time.
Both terminal sets are configured for remote sensing of the
output as follows:
High Output and High Sense
Low Output and Low Sense
Case Ground.
GENERAL
Display: LCD, 7.5 digits. Displays output settings and other
pertinent information.
Isolation: Power transformer-to-analog output, control
logic-to-analog output, optically isolated.
OPTIONS
KH523CAL: Calibration and Test License - License to
unlock the 523 for calibration with KH523CAL Calibration
Software.
CAB005: Cable, 2 conductor shielded balanced line.
CAB018: Cable: multi-stacking double banana plug.
CAB023: The CAB023 is a low thermal EMF retractable
sheath banana plug patch cord set. These low thermal
cables minimize thermal errors so accurate low voltage
measurements can be made. Each set includes 2 test leads
(one black and one red).
CAB024: The CAB024 is a low thermal EMF spade lug
patch cord set for low voltage measurements. These low
thermal cables minimize thermal errors so accurate low
voltage measurements can be made. Each set includes 2
test leads (one black and one red).
ACCESSORIES
3 terminal line cord.
Operating manual.
Specifications are subject to change without notice.
Krohn-Hite Corporation, 15 Jonathan Drive, Unit 4, Brockton, MA 02301
Tel: 508-580-1660; Fax: 508-583-8989; www.krohn-hite.com; email: sales@krohn-hite.com
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523Data.vp
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